本来要编译MariaDB的，结果使用Ralink的工具链，在链接uClibc++库的时候，因为没有-fPIC导致链接.a文件有异常。
因此只好自己来编译Ralink的工具链了。目前虚拟机使用的是CentOS 7.3.1611 64bit。
前期准备
由于Ralink的工具链比较早一些，而centos7带的一些可执行程序比较新。主要是make以及texinfo。make可以直接从Ubuntu上拷贝一个3.81版本，或者自己去下个3.81版本的编译。而texinfo则使用4.13版本，编译安装。安装后，先拷贝到自己的一个目录，比如~/bin
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export PATH=~/bin:$PATH |
将新编译的加入PATH，这样编译的时候，优先走自己编译的make以及texinfo。
gcc 4.6.3有个BUG，需要先打上补丁。
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tar jxvf buildroot-gcc463-src.tar.bz2 cd buildroot-2012.11.1/dl tar jxvf gcc-4.6.3.tar.bz2 # 解压gcc 4.6.3 vim gcc-4.6.3/gcc/ira-int.h |
补丁如下：
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--- gcc-4.6.3-old/gcc/ira-int.h 2015-07-27 12:51:58.898656272 +0800 +++ gcc-4.6.3/gcc/ira-int.h 2015-07-27 12:53:33.644588455 +0800 @@ -1123,8 +1123,13 @@ ira_allocno_object_iter_cond (ira_allocno_object_iterator *i, ira_allocno_t a, ira_object_t *o) { - *o = ALLOCNO_OBJECT (a, i->n); - return i->n++ < ALLOCNO_NUM_OBJECTS (a); + int n = i->n++; + if (n < ALLOCNO_NUM_OBJECTS (a)) + { + *o = ALLOCNO_OBJECT (a, n); + return true; + } + return false; } /* Loop over all objects associated with allocno A. In each |
重新打包gcc 4.6.3
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rm gcc-4.6.3.tar.bz2 tar cjvf gcc-4.6.3.tar.bz2 gcc-4.6.3 cd .. |
libstdc++编译开启-fPIC
要支持-fPIC的话，需要gcc的编译选项中添加–width-pic才行，具体make menuconfig如下：
或者直接修改.config文件：
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BR2_EXTRA_GCC_CONFIG_OPTIONS="--with-pic" |
开始编译
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make V=1 |
如果没有修改menuconfig中的gcc输出路径，那么gcc路径默认/opt/buildroot-gcc463 成功后，则安装了新的工具链到该路径下。
支持ucontext
后续编译需要用到ucontext，参考了uClibc-ng以及github上的一个uClibc源码。给现有的工程打上补丁：
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diff -auNr uClibc-0.9.33.2.orig/extra/Configs/Config.arm uClibc-0.9.33.2/extra/Configs/Config.arm --- uClibc-0.9.33.2.orig/extra/Configs/Config.arm 2012-05-15 15:20:09.000000000 +0800 +++ uClibc-0.9.33.2/extra/Configs/Config.arm 2017-07-12 11:28:08.118231319 +0800 @@ -11,6 +11,7 @@ bool default y select ARCH_ANY_ENDIAN + select ARCH_HAS_UCONTEXT config CONFIG_ARM_EABI bool "Build for EABI" diff -auNr uClibc-0.9.33.2.orig/extra/Configs/Config.i386 uClibc-0.9.33.2/extra/Configs/Config.i386 --- uClibc-0.9.33.2.orig/extra/Configs/Config.i386 2012-05-15 15:20:09.000000000 +0800 +++ uClibc-0.9.33.2/extra/Configs/Config.i386 2017-07-12 11:28:47.189896934 +0800 @@ -12,6 +12,7 @@ default y select ARCH_LITTLE_ENDIAN select ARCH_HAS_MMU + select ARCH_HAS_UCONTEXT choice prompt "Target x86 Processor Family" diff -auNr uClibc-0.9.33.2.orig/extra/Configs/Config.in uClibc-0.9.33.2/extra/Configs/Config.in --- uClibc-0.9.33.2.orig/extra/Configs/Config.in 2012-05-15 15:20:09.000000000 +0800 +++ uClibc-0.9.33.2/extra/Configs/Config.in 2017-07-12 11:24:16.654753208 +0800 @@ -261,6 +261,9 @@ bool select ARCH_HAS_NO_SHARED +config ARCH_HAS_UCONTEXT + bool + config HAVE_SHARED bool "Enable shared libraries" depends on !ARCH_HAS_NO_SHARED @@ -270,6 +273,8 @@ answer Y here. If you only want to build uClibc as a static library, then answer N. + + config FORCE_SHAREABLE_TEXT_SEGMENTS bool "Only load shared libraries which can share their text segment" depends on HAVE_SHARED @@ -670,6 +675,19 @@ WARNING! ABI incompatibility. +config UCLIBC_HAS_CONTEXT_FUNCS + bool "Use obsolescent context control functions" + depends on UCLIBC_SUSV3_LEGACY && ARCH_HAS_UCONTEXT + help + Add into library the SuSv3 obsolescent functions used for context + control. The setcontext family allows the implementation in C of + advanced control flow patterns such as iterators, fibers, and + coroutines. They may be viewed as an advanced version of + setjmp/longjmp; whereas the latter allows only a single non-local jump + up the stack, setcontext allows the creation of multiple cooperative + threads of control, each with its own stack. + These functions are: setcontext, getcontext, makecontext, swapcontext. + config UCLIBC_SUSV3_LEGACY_MACROS bool "Enable SuSv3 LEGACY macros" help diff -auNr uClibc-0.9.33.2.orig/extra/Configs/Config.mips uClibc-0.9.33.2/extra/Configs/Config.mips --- uClibc-0.9.33.2.orig/extra/Configs/Config.mips 2012-05-15 15:20:09.000000000 +0800 +++ uClibc-0.9.33.2/extra/Configs/Config.mips 2017-07-12 11:29:54.720719706 +0800 @@ -11,6 +11,7 @@ bool default y select ARCH_ANY_ENDIAN + select ARCH_HAS_UCONTEXT choice prompt "Target ABI" diff -auNr uClibc-0.9.33.2.orig/extra/Configs/Config.sparc uClibc-0.9.33.2/extra/Configs/Config.sparc --- uClibc-0.9.33.2.orig/extra/Configs/Config.sparc 2012-05-15 15:20:09.000000000 +0800 +++ uClibc-0.9.33.2/extra/Configs/Config.sparc 2017-07-12 11:30:21.446062749 +0800 @@ -11,6 +11,7 @@ bool default y select ARCH_BIG_ENDIAN + select ARCH_HAS_UCONTEXT choice prompt "Target Processor Type" diff -auNr uClibc-0.9.33.2.orig/extra/Configs/Config.x86_64 uClibc-0.9.33.2/extra/Configs/Config.x86_64 --- uClibc-0.9.33.2.orig/extra/Configs/Config.x86_64 2012-05-15 15:20:09.000000000 +0800 +++ uClibc-0.9.33.2/extra/Configs/Config.x86_64 2017-07-12 11:30:43.520122217 +0800 @@ -12,3 +12,4 @@ default y select ARCH_LITTLE_ENDIAN select ARCH_HAS_MMU + select ARCH_HAS_UCONTEXT diff -auNr uClibc-0.9.33.2.orig/include/ucontext.h uClibc-0.9.33.2/include/ucontext.h --- uClibc-0.9.33.2.orig/include/ucontext.h 2012-05-15 15:20:09.000000000 +0800 +++ uClibc-0.9.33.2/include/ucontext.h 2017-07-12 10:55:40.052036939 +0800 @@ -12,21 +12,46 @@ Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +/* The System V ABI user-level context switching support functions + are marked obsolescent by SuSv3. */ #ifndef _UCONTEXT_H #define _UCONTEXT_H 1 #include <features.h> +#ifdef __UCLIBC_HAS_CONTEXT_FUNCS__ + /* Get machine dependent definition of data structures. */ #include <sys/ucontext.h> -/* The System V ABI user-level context switching support functions - * are marked obsolescent by SuSv3, and are not implemented by - * uClibc. This header is therefore empty. */ +__BEGIN_DECLS + +/* Get user context and store it in variable pointed to by UCP. */ +extern int getcontext (ucontext_t *__ucp) __THROW; + +/* Set user context from information of variable pointed to by UCP. */ +extern int setcontext (const ucontext_t *__ucp) __THROW; + +/* Save current context in context variable pointed to by OUCP and set + context from variable pointed to by UCP. */ +extern int swapcontext (ucontext_t *__restrict __oucp, + const ucontext_t *__restrict __ucp) __THROW; + +/* Manipulate user context UCP to continue with calling functions FUNC + and the ARGC-1 parameters following ARGC when the context is used + the next time in `setcontext' or `swapcontext'. + + We cannot say anything about the parameters FUNC takes; `void' + is as good as any other choice. */ +extern void makecontext (ucontext_t *__ucp, void (*__func) (void), + int __argc, ...) __THROW; + +__END_DECLS +#endif #endif /* ucontext.h */ diff -auNr uClibc-0.9.33.2.orig/libc/sysdeps/linux/arm/getcontext.S uClibc-0.9.33.2/libc/sysdeps/linux/arm/getcontext.S --- uClibc-0.9.33.2.orig/libc/sysdeps/linux/arm/getcontext.S 1970-01-01 08:00:00.000000000 +0800 +++ uClibc-0.9.33.2/libc/sysdeps/linux/arm/getcontext.S 2017-07-12 10:01:16.958007325 +0800 @@ -0,0 +1,80 @@ +/* Copyright (C) 2012 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> + +#include "ucontext_i.h" + + .syntax unified + .text + +/* int getcontext (ucontext_t *ucp) */ + +ENTRY(__getcontext) + /* No need to save r0-r3, d0-d7, or d16-d31. */ + add r1, r0, #MCONTEXT_ARM_R4 + stmia r1, {r4-r11} + + /* Save R13 separately as Thumb can't STM it. */ + str r13, [r0, #MCONTEXT_ARM_SP] + str r14, [r0, #MCONTEXT_ARM_LR] + /* Return to LR */ + str r14, [r0, #MCONTEXT_ARM_PC] + /* Return zero */ + mov r2, #0 + str r2, [r0, #MCONTEXT_ARM_R0] + + /* Save ucontext_t * across the next call. */ + mov r4, r0 + + /* __sigprocmask(SIG_BLOCK, NULL, &(ucontext->uc_sigmask)) */ + mov r0, #SIG_BLOCK + mov r1, #0 + add r2, r4, #UCONTEXT_SIGMASK + bl PLTJMP(sigprocmask) + +#if defined __UCLIBC_HAS_FLOATS__ && ! defined __UCLIBC_HAS_SOFT_FLOAT__ +# ifdef __VFP_FP__ + /* Store the VFP registers. */ + /* Following instruction is fstmiax ip!, {d8-d15}. */ + stc p11, cr8, [r0], #64 + /* Store the floating-point status register. */ + /* Following instruction is fmrx r2, fpscr. */ + mrc p10, 7, r1, cr1, cr0, 0 + str r1, [r0], #4 +# endif +#endif +#ifdef __IWMMXT__ + /* Save the call-preserved iWMMXt registers. */ + /* Following instructions are wstrd wr10, [r0], #8 (etc.) */ + stcl p1, cr10, [r0], #8 + stcl p1, cr11, [r0], #8 + stcl p1, cr12, [r0], #8 + stcl p1, cr13, [r0], #8 + stcl p1, cr14, [r0], #8 + stcl p1, cr15, [r0], #8 +#endif + + /* Restore the clobbered R4 and LR. */ + ldr r14, [r4, #MCONTEXT_ARM_LR] + ldr r4, [r4, #MCONTEXT_ARM_R4] + + mov r0, #0 + DO_RET(r14) + +END(__getcontext) +weak_alias(__getcontext, getcontext) diff -auNr uClibc-0.9.33.2.orig/libc/sysdeps/linux/arm/makecontext.c uClibc-0.9.33.2/libc/sysdeps/linux/arm/makecontext.c --- uClibc-0.9.33.2.orig/libc/sysdeps/linux/arm/makecontext.c 1970-01-01 08:00:00.000000000 +0800 +++ uClibc-0.9.33.2/libc/sysdeps/linux/arm/makecontext.c 2017-07-12 10:01:47.064074100 +0800 @@ -0,0 +1,73 @@ +/* Copyright (C) 2012 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <stdarg.h> +#include <ucontext.h> + +/* Number of arguments that go in registers. */ +#define NREG_ARGS 4 + +/* Take a context previously prepared via getcontext() and set to + call func() with the given int only args. */ +void +__makecontext (ucontext_t *ucp, void (*func) (void), int argc, ...) +{ + extern void __startcontext (void); + unsigned long *funcstack; + va_list vl; + unsigned long *regptr; + unsigned int reg; + int misaligned; + + /* Start at the top of stack. */ + funcstack = (unsigned long *) (ucp->uc_stack.ss_sp + ucp->uc_stack.ss_size); + + /* Ensure the stack stays eight byte aligned. */ + misaligned = ((unsigned long) funcstack & 4) != 0; + + if ((argc > NREG_ARGS) && (argc & 1) != 0) + misaligned = !misaligned; + + if (misaligned) + funcstack -= 1; + + va_start (vl, argc); + + /* Reserve space for the on-stack arguments. */ + if (argc > NREG_ARGS) + funcstack -= (argc - NREG_ARGS); + + ucp->uc_mcontext.arm_sp = (unsigned long) funcstack; + ucp->uc_mcontext.arm_pc = (unsigned long) func; + + /* Exit to startcontext() with the next context in R4 */ + ucp->uc_mcontext.arm_r4 = (unsigned long) ucp->uc_link; + ucp->uc_mcontext.arm_lr = (unsigned long) __startcontext; + + /* The first four arguments go into registers. */ + regptr = &(ucp->uc_mcontext.arm_r0); + + for (reg = 0; (reg < argc) && (reg < NREG_ARGS); reg++) + *regptr++ = va_arg (vl, unsigned long); + + /* And the remainder on the stack. */ + for (; reg < argc; reg++) + *funcstack++ = va_arg (vl, unsigned long); + + va_end (vl); +} +weak_alias (__makecontext, makecontext) diff -auNr uClibc-0.9.33.2.orig/libc/sysdeps/linux/arm/Makefile.arch uClibc-0.9.33.2/libc/sysdeps/linux/arm/Makefile.arch --- uClibc-0.9.33.2.orig/libc/sysdeps/linux/arm/Makefile.arch 2012-05-15 15:20:09.000000000 +0800 +++ uClibc-0.9.33.2/libc/sysdeps/linux/arm/Makefile.arch 2017-07-12 10:56:03.365657878 +0800 @@ -20,6 +20,11 @@ CSRC += posix_fadvise.c posix_fadvise64.c endif +ifeq ($(UCLIBC_HAS_CONTEXT_FUNCS),y) +CSRC += makecontext.c +SSRC += getcontext.S setcontext.S swapcontext.S +endif + # Is our compiler set up for EABI ? IS_EABI:=$(shell $(CC) $(CFLAGS) -x c - -E -dM </dev/null 2>/dev/null \ | grep __ARM_EABI__ 2>&1 >/dev/null && echo 'y' \ diff -auNr uClibc-0.9.33.2.orig/libc/sysdeps/linux/arm/setcontext.S uClibc-0.9.33.2/libc/sysdeps/linux/arm/setcontext.S --- uClibc-0.9.33.2.orig/libc/sysdeps/linux/arm/setcontext.S 1970-01-01 08:00:00.000000000 +0800 +++ uClibc-0.9.33.2/libc/sysdeps/linux/arm/setcontext.S 2017-07-12 10:02:10.185332844 +0800 @@ -0,0 +1,76 @@ +/* Copyright (C) 2012 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> + +#include "ucontext_i.h" + + .syntax unified + .text + +/* int setcontext (const ucontext_t *ucp) */ + +ENTRY(__setcontext) + mov r4, r0 + +#if defined __UCLIBC_HAS_FLOATS__ && ! defined __UCLIBC_HAS_SOFT_FLOAT__ +# ifdef __VFP_FP__ + /* Following instruction is vldmia r0!, {d8-d15}. */ + ldc p11, cr8, [r0], #64 + /* Restore the floating-point status register. */ + ldr r1, [r0], #4 + /* Following instruction is fmxr fpscr, r1. */ + mcr p10, 7, r1, cr1, cr0, 0 +# endif +#endif + +#ifdef __IWMMXT__ + /* Restore the call-preserved iWMMXt registers. */ + /* Following instructions are wldrd wr10, [r0], #8 (etc.) */ + ldcl p1, cr10, [r0], #8 + ldcl p1, cr11, [r0], #8 + ldcl p1, cr12, [r0], #8 + ldcl p1, cr13, [r0], #8 + ldcl p1, cr14, [r0], #8 + ldcl p1, cr15, [r0], #8 +#endif + + /* Now bring back the signal status. */ + mov r0, #SIG_SETMASK + add r1, r4, #UCONTEXT_SIGMASK + mov r2, #0 + bl PLTJMP(sigprocmask) + + /* Loading r0-r3 makes makecontext easier. */ + add r14, r4, #MCONTEXT_ARM_R0 + ldmia r14, {r0-r11} + ldr r13, [r14, #(MCONTEXT_ARM_SP - MCONTEXT_ARM_R0)] + add r14, r14, #(MCONTEXT_ARM_LR - MCONTEXT_ARM_R0) + ldmia r14, {r14, pc} + +END(setcontext) +weak_alias(__setcontext, setcontext) + + /* Called when a makecontext() context returns. Start the + context in R4 or fall through to exit(). */ +ENTRY(__startcontext) + movs r0, r4 + bne PLTJMP(__setcontext) + + @ New context was 0 - exit + b PLTJMP(_exit) +END(__startcontext) diff -auNr uClibc-0.9.33.2.orig/libc/sysdeps/linux/arm/swapcontext.S uClibc-0.9.33.2/libc/sysdeps/linux/arm/swapcontext.S --- uClibc-0.9.33.2.orig/libc/sysdeps/linux/arm/swapcontext.S 1970-01-01 08:00:00.000000000 +0800 +++ uClibc-0.9.33.2/libc/sysdeps/linux/arm/swapcontext.S 2017-07-12 10:02:25.158651583 +0800 @@ -0,0 +1,63 @@ +/* Copyright (C) 2012 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> + +#include "ucontext_i.h" + + .syntax unified + .text + +/* int swapcontext (ucontext_t *oucp, const ucontext_t *ucp) */ + +ENTRY(swapcontext) + + /* Have getcontext() do most of the work then fix up + LR afterwards. Save R3 to keep the stack aligned. */ + push {r0,r1,r3,r14} + cfi_adjust_cfa_offset (16) + cfi_rel_offset (r0,0) + cfi_rel_offset (r1,4) + cfi_rel_offset (r3,8) + cfi_rel_offset (r14,12) + + bl __getcontext + mov r4, r0 + + pop {r0,r1,r3,r14} + cfi_adjust_cfa_offset (-16) + cfi_restore (r0) + cfi_restore (r1) + cfi_restore (r3) + cfi_restore (r14) + + /* Exit if getcontext() failed. */ + cmp r4, #0 + itt ne + movne r0, r4 + RETINSTR(ne, r14) + + /* Fix up LR and the PC. */ + str r13,[r0, #MCONTEXT_ARM_SP] + str r14,[r0, #MCONTEXT_ARM_LR] + str r14,[r0, #MCONTEXT_ARM_PC] + + /* And swap using swapcontext(). */ + mov r0, r1 + b __setcontext + +END(swapcontext) diff -auNr uClibc-0.9.33.2.orig/libc/sysdeps/linux/arm/ucontext_i.sym uClibc-0.9.33.2/libc/sysdeps/linux/arm/ucontext_i.sym --- uClibc-0.9.33.2.orig/libc/sysdeps/linux/arm/ucontext_i.sym 1970-01-01 08:00:00.000000000 +0800 +++ uClibc-0.9.33.2/libc/sysdeps/linux/arm/ucontext_i.sym 2017-07-12 10:02:42.470266666 +0800 @@ -0,0 +1,30 @@ +#include <inttypes.h> +#include <signal.h> +#include <stddef.h> +#include <sys/ucontext.h> + +SIG_BLOCK +SIG_SETMASK + +-- Offsets of the fields in the ucontext_t structure. +#define ucontext(member) offsetof (ucontext_t, member) +#define mcontext(member) ucontext (uc_mcontext.member) + +UCONTEXT_FLAGS ucontext (uc_flags) +UCONTEXT_LINK ucontext (uc_link) +UCONTEXT_STACK ucontext (uc_stack) +UCONTEXT_MCONTEXT ucontext (uc_mcontext) +UCONTEXT_SIGMASK ucontext (uc_sigmask) + +UCONTEXT_REGSPACE ucontext (uc_regspace) + +MCONTEXT_TRAP_NO mcontext (trap_no) +MCONTEXT_ERROR_CODE mcontext (error_code) +MCONTEXT_OLDMASK mcontext (oldmask) +MCONTEXT_ARM_R0 mcontext (arm_r0) +MCONTEXT_ARM_R4 mcontext (arm_r4) +MCONTEXT_ARM_SP mcontext (arm_sp) +MCONTEXT_ARM_LR mcontext (arm_lr) +MCONTEXT_ARM_PC mcontext (arm_pc) +MCONTEXT_ARM_CPSR mcontext (arm_cpsr) +MCONTEXT_FAULT_ADDRESS mcontext (fault_address) diff -auNr uClibc-0.9.33.2.orig/libc/sysdeps/linux/i386/getcontext.S uClibc-0.9.33.2/libc/sysdeps/linux/i386/getcontext.S --- uClibc-0.9.33.2.orig/libc/sysdeps/linux/i386/getcontext.S 1970-01-01 08:00:00.000000000 +0800 +++ uClibc-0.9.33.2/libc/sysdeps/linux/i386/getcontext.S 2017-07-12 10:07:20.875898464 +0800 @@ -0,0 +1,84 @@ +/* Save current context. + Copyright (C) 2001-2012 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@redhat.com>, 2001. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> + +#include "ucontext_i.h" + + +ENTRY(__getcontext) + /* Load address of the context data structure. */ + movl 4(%esp), %eax + + /* Return value of getcontext. EAX is the only register whose + value is not preserved. */ + movl $0, oEAX(%eax) + + /* Save the 32-bit register values and the return address. */ + movl %ecx, oECX(%eax) + movl %edx, oEDX(%eax) + movl %edi, oEDI(%eax) + movl %esi, oESI(%eax) + movl %ebp, oEBP(%eax) + movl (%esp), %ecx + movl %ecx, oEIP(%eax) + leal 4(%esp), %ecx /* Exclude the return address. */ + movl %ecx, oESP(%eax) + movl %ebx, oEBX(%eax) + + /* Save the FS segment register. We don't touch the GS register + since it is used for threads. */ + xorl %edx, %edx + movw %fs, %dx + movl %edx, oFS(%eax) + + /* We have separate floating-point register content memory on the + stack. We use the __fpregs_mem block in the context. Set the + links up correctly. */ + leal oFPREGSMEM(%eax), %ecx + movl %ecx, oFPREGS(%eax) + /* Save the floating-point context. */ + fnstenv (%ecx) + /* And load it right back since the processor changes the mask. + Intel thought this opcode to be used in interrupt handlers which + would block all exceptions. */ + fldenv (%ecx) + + /* Save the current signal mask. */ + pushl %ebx + cfi_adjust_cfa_offset (4) + cfi_rel_offset (ebx, 0) + leal oSIGMASK(%eax), %edx + xorl %ecx, %ecx + movl $SIG_BLOCK, %ebx + movl $__NR_sigprocmask, %eax + ENTER_KERNEL + popl %ebx + cfi_adjust_cfa_offset (-4) + cfi_restore (ebx) + cmpl $-4095, %eax /* Check %eax for error. */ + jae SYSCALL_ERROR_LABEL /* Jump to error handler if error. */ + + /* All done, return 0 for success. */ + xorl %eax, %eax +L(pseudo_end): + ret +PSEUDO_END(__getcontext) + +weak_alias (__getcontext, getcontext) diff -auNr uClibc-0.9.33.2.orig/libc/sysdeps/linux/i386/makecontext.S uClibc-0.9.33.2/libc/sysdeps/linux/i386/makecontext.S --- uClibc-0.9.33.2.orig/libc/sysdeps/linux/i386/makecontext.S 1970-01-01 08:00:00.000000000 +0800 +++ uClibc-0.9.33.2/libc/sysdeps/linux/i386/makecontext.S 2017-07-12 10:07:27.001392617 +0800 @@ -0,0 +1,123 @@ +/* Create new context. + Copyright (C) 2001,2002,2005,2007,2008,2009 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@redhat.com>, 2001. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> + +#include "ucontext_i.h" + + +ENTRY(__makecontext) + movl 4(%esp), %eax + + /* Load the address of the function we are supposed to run. */ + movl 8(%esp), %ecx + + /* Compute the address of the stack. The information comes from + to us_stack element. */ + movl oSS_SP(%eax), %edx + movl %ecx, oEIP(%eax) + addl oSS_SIZE(%eax), %edx + + /* Remember the number of parameters for the exit handler since + it has to remove them. We store the number in the EBX register + which the function we will call must preserve. */ + movl 12(%esp), %ecx + movl %ecx, oEBX(%eax) + + /* Make room on the new stack for the parameters. + Room for the arguments, return address (== L(exitcode)) and + oLINK pointer is needed. One of the pointer sizes is subtracted + after aligning the stack. */ + negl %ecx + leal -4(%edx,%ecx,4), %edx + negl %ecx + + /* Align the stack. */ + andl $0xfffffff0, %edx + subl $4, %edx + + /* Store the future stack pointer. */ + movl %edx, oESP(%eax) + + /* Put the next context on the new stack (from the uc_link + element). */ + movl oLINK(%eax), %eax + movl %eax, 4(%edx,%ecx,4) + + /* Copy all the parameters. */ + jecxz 2f +1: movl 12(%esp,%ecx,4), %eax + movl %eax, (%edx,%ecx,4) + decl %ecx + jnz 1b +2: + + /* If the function we call returns we must continue with the + context which is given in the uc_link element. To do this + set the return address for the function the user provides + to a little bit of helper code which does the magic (see + below). */ +#ifdef __PIC__ + call 1f + cfi_adjust_cfa_offset (4) +1: popl %ecx + cfi_adjust_cfa_offset (-4) + addl $L(exitcode)-1b, %ecx + movl %ecx, (%edx) +#else + movl $L(exitcode), (%edx) +#endif + /* 'makecontext' returns no value. */ +L(pseudo_end): + ret + + /* This is the helper code which gets called if a function which + is registered with 'makecontext' returns. In this case we + have to install the context listed in the uc_link element of + the context 'makecontext' manipulated at the time of the + 'makecontext' call. If the pointer is NULL the process must + terminate. */ + cfi_endproc +L(exitcode): + /* This removes the parameters passed to the function given to + 'makecontext' from the stack. EBX contains the number of + parameters (see above). */ + leal (%esp,%ebx,4), %esp + +#ifdef __PIC__ + call 1f +1: popl %ebx + addl $_GLOBAL_OFFSET_TABLE_+[.-1b], %ebx +#endif + cmpl $0, (%esp) /* Check the next context. */ + je 2f /* If it is zero exit. */ + + call JUMPTARGET(__setcontext) + /* If this returns (which can happen if the syscall fails) we'll + exit the program with the return error value (-1). */ + + movl %eax, (%esp) +2: call HIDDEN_JUMPTARGET(exit) + /* The 'exit' call should never return. In case it does cause + the process to terminate. */ + hlt + cfi_startproc +END(__makecontext) + +weak_alias (__makecontext, makecontext) diff -auNr uClibc-0.9.33.2.orig/libc/sysdeps/linux/i386/Makefile.arch uClibc-0.9.33.2/libc/sysdeps/linux/i386/Makefile.arch --- uClibc-0.9.33.2.orig/libc/sysdeps/linux/i386/Makefile.arch 2012-05-15 15:20:09.000000000 +0800 +++ uClibc-0.9.33.2/libc/sysdeps/linux/i386/Makefile.arch 2017-07-12 10:56:36.151422861 +0800 @@ -15,3 +15,10 @@ ifneq ($(UCLIBC_HAS_THREADS_NATIVE),y) SSRC += vfork.S clone.S endif + + +ifeq ($(UCLIBC_HAS_CONTEXT_FUNCS),y) +CSRC += makecontext.c +SSRC += getcontext.S setcontext.S swapcontext.S +endif + diff -auNr uClibc-0.9.33.2.orig/libc/sysdeps/linux/i386/setcontext.S uClibc-0.9.33.2/libc/sysdeps/linux/i386/setcontext.S --- uClibc-0.9.33.2.orig/libc/sysdeps/linux/i386/setcontext.S 1970-01-01 08:00:00.000000000 +0800 +++ uClibc-0.9.33.2/libc/sysdeps/linux/i386/setcontext.S 2017-07-12 10:07:37.907760254 +0800 @@ -0,0 +1,96 @@ +/* Install given context. + Copyright (C) 2001-2012 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@redhat.com>, 2001. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> + +#include "ucontext_i.h" + + +ENTRY(__setcontext) + /* Load address of the context data structure. */ + movl 4(%esp), %eax + + /* Get the current signal mask. Note that we preserve EBX in case + the system call fails and we return from the function with an + error. */ + pushl %ebx + cfi_adjust_cfa_offset (4) + xorl %edx, %edx + leal oSIGMASK(%eax), %ecx + movl $SIG_SETMASK, %ebx + cfi_rel_offset (ebx, 0) + movl $__NR_sigprocmask, %eax + ENTER_KERNEL + popl %ebx + cfi_adjust_cfa_offset (-4) + cfi_restore (ebx) + cmpl $-4095, %eax /* Check %eax for error. */ + jae SYSCALL_ERROR_LABEL /* Jump to error handler if error. */ + + /* EAX was modified, reload it. */ + movl 4(%esp), %eax + + /* Restore the floating-point context. Not the registers, only the + rest. */ + movl oFPREGS(%eax), %ecx + fldenv (%ecx) + + /* Restore the FS segment register. We don't touch the GS register + since it is used for threads. */ + movl oFS(%eax), %ecx + movw %cx, %fs + + /* Fetch the address to return to. */ + movl oEIP(%eax), %ecx + + /* Load the new stack pointer. */ + cfi_def_cfa (eax, 0) + cfi_offset (edi, oEDI) + cfi_offset (esi, oESI) + cfi_offset (ebp, oEBP) + cfi_offset (ebx, oEBX) + cfi_offset (edx, oEDX) + cfi_offset (ecx, oECX) + movl oESP(%eax), %esp + + /* Push the return address on the new stack so we can return there. */ + pushl %ecx + + /* Load the values of all the 32-bit registers (except ESP). + Since we are loading from EAX, it must be last. */ + movl oEDI(%eax), %edi + movl oESI(%eax), %esi + movl oEBP(%eax), %ebp + movl oEBX(%eax), %ebx + movl oEDX(%eax), %edx + movl oECX(%eax), %ecx + movl oEAX(%eax), %eax + + /* End FDE here, we fall into another context. */ + cfi_endproc + cfi_startproc + + /* The following 'ret' will pop the address of the code and jump + to it. */ + +L(pseudo_end): + ret +PSEUDO_END(__setcontext) + +weak_alias (__setcontext, setcontext) diff -auNr uClibc-0.9.33.2.orig/libc/sysdeps/linux/i386/swapcontext.S uClibc-0.9.33.2/libc/sysdeps/linux/i386/swapcontext.S --- uClibc-0.9.33.2.orig/libc/sysdeps/linux/i386/swapcontext.S 1970-01-01 08:00:00.000000000 +0800 +++ uClibc-0.9.33.2/libc/sysdeps/linux/i386/swapcontext.S 2017-07-12 10:07:45.094110981 +0800 @@ -0,0 +1,110 @@ +/* Save current context and install the given one. + Copyright (C) 2001-2012 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@redhat.com>, 2001. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> + +#include "ucontext_i.h" + + +ENTRY(__swapcontext) + /* Load address of the context data structure we save in. */ + movl 4(%esp), %eax + + /* Return value of swapcontext. EAX is the only register whose + value is not preserved. */ + movl $0, oEAX(%eax) + + /* Save the 32-bit register values and the return address. */ + movl %ecx, oECX(%eax) + movl %edx, oEDX(%eax) + movl %edi, oEDI(%eax) + movl %esi, oESI(%eax) + movl %ebp, oEBP(%eax) + movl (%esp), %ecx + movl %ecx, oEIP(%eax) + leal 4(%esp), %ecx + movl %ecx, oESP(%eax) + movl %ebx, oEBX(%eax) + + /* Save the FS segment register. */ + xorl %edx, %edx + movw %fs, %dx + movl %edx, oFS(%eax) + + /* We have separate floating-point register content memory on the + stack. We use the __fpregs_mem block in the context. Set the + links up correctly. */ + leal oFPREGSMEM(%eax), %ecx + movl %ecx, oFPREGS(%eax) + /* Save the floating-point context. */ + fnstenv (%ecx) + + /* Load address of the context data structure we have to load. */ + movl 8(%esp), %ecx + + /* Save the current signal mask and install the new one. */ + pushl %ebx + leal oSIGMASK(%eax), %edx + leal oSIGMASK(%ecx), %ecx + movl $SIG_SETMASK, %ebx + movl $__NR_sigprocmask, %eax + ENTER_KERNEL + popl %ebx + cmpl $-4095, %eax /* Check %eax for error. */ + jae SYSCALL_ERROR_LABEL /* Jump to error handler if error. */ + + /* EAX was modified, reload it. */ + movl 8(%esp), %eax + + /* Restore the floating-point context. Not the registers, only the + rest. */ + movl oFPREGS(%eax), %ecx + fldenv (%ecx) + + /* Restore the FS segment register. We don't touch the GS register + since it is used for threads. */ + movl oFS(%eax), %edx + movw %dx, %fs + + /* Fetch the address to return to. */ + movl oEIP(%eax), %ecx + + /* Load the new stack pointer. */ + movl oESP(%eax), %esp + + /* Push the return address on the new stack so we can return there. */ + pushl %ecx + + /* Load the values of all the 32-bit registers (except ESP). + Since we are loading from EAX, it must be last. */ + movl oEDI(%eax), %edi + movl oESI(%eax), %esi + movl oEBP(%eax), %ebp + movl oEBX(%eax), %ebx + movl oEDX(%eax), %edx + movl oECX(%eax), %ecx + movl oEAX(%eax), %eax + + /* The following 'ret' will pop the address of the code and jump + to it. */ +L(pseudo_end): + ret +PSEUDO_END(__swapcontext) + +weak_alias (__swapcontext, swapcontext) diff -auNr uClibc-0.9.33.2.orig/libc/sysdeps/linux/i386/ucontext_i.sym uClibc-0.9.33.2/libc/sysdeps/linux/i386/ucontext_i.sym --- uClibc-0.9.33.2.orig/libc/sysdeps/linux/i386/ucontext_i.sym 1970-01-01 08:00:00.000000000 +0800 +++ uClibc-0.9.33.2/libc/sysdeps/linux/i386/ucontext_i.sym 2017-07-12 10:07:50.098586561 +0800 @@ -0,0 +1,30 @@ +#include <stddef.h> +#include <signal.h> +#include <sys/ucontext.h> + +-- + +SIG_BLOCK +SIG_SETMASK + +#define ucontext(member) offsetof (ucontext_t, member) +#define mcontext(member) ucontext (uc_mcontext.member) +#define mreg(reg) mcontext (gregs[REG_##reg]) + +oLINK ucontext (uc_link) +oSS_SP ucontext (uc_stack.ss_sp) +oSS_SIZE ucontext (uc_stack.ss_size) +oGS mreg (GS) +oFS mreg (FS) +oEDI mreg (EDI) +oESI mreg (ESI) +oEBP mreg (EBP) +oESP mreg (ESP) +oEBX mreg (EBX) +oEDX mreg (EDX) +oECX mreg (ECX) +oEAX mreg (EAX) +oEIP mreg (EIP) +oFPREGS mcontext (fpregs) +oSIGMASK ucontext (uc_sigmask) +oFPREGSMEM ucontext (__fpregs_mem) diff -auNr uClibc-0.9.33.2.orig/libc/sysdeps/linux/Makefile.commonarch uClibc-0.9.33.2/libc/sysdeps/linux/Makefile.commonarch --- uClibc-0.9.33.2.orig/libc/sysdeps/linux/Makefile.commonarch 2012-05-15 15:20:09.000000000 +0800 +++ uClibc-0.9.33.2/libc/sysdeps/linux/Makefile.commonarch 2017-07-12 11:55:56.768777061 +0800 @@ -39,3 +39,23 @@ $(do_rm) $(ARCH_HEADERS_OUT) endif + +CFLAGS-ucontext_i.c = -S + +$(ARCH_OUT)/ucontext_i.c: $(ARCH_DIR)/ucontext_i.sym + $(do_awk) $(top_srcdir)extra/scripts/gen-as-const.awk $< > $@ + +$(ARCH_OUT)/ucontext_i.s: $(ARCH_OUT)/ucontext_i.c + $(compile.c) + +$(ARCH_OUT)/ucontext_i.h: $(ARCH_OUT)/ucontext_i.s + $(do_sed) $(PTHREAD_GENERATE_MANGLE) $< > $@ + +pregen-headers-$(UCLIBC_HAS_CONTEXT_FUNCS) += $(ARCH_OUT)/ucontext_i.h + +headers_clean-$(UCLIBC_HAS_CONTEXT_FUNCS) += \ + HEADERCLEAN_$(subst $(top_builddir),,$(ARCH_OUT)/ucontext_i) + +HEADERCLEAN_$(subst $(top_builddir),,$(ARCH_OUT)/ucontext_i): + $(do_rm) $(addprefix $(ARCH_OUT)/ucontext_i., c h s) + diff -auNr uClibc-0.9.33.2.orig/libc/sysdeps/linux/mips/getcontext.S uClibc-0.9.33.2/libc/sysdeps/linux/mips/getcontext.S --- uClibc-0.9.33.2.orig/libc/sysdeps/linux/mips/getcontext.S 1970-01-01 08:00:00.000000000 +0800 +++ uClibc-0.9.33.2/libc/sysdeps/linux/mips/getcontext.S 2017-07-12 10:08:43.355993078 +0800 @@ -0,0 +1,141 @@ +/* Save current context. + Copyright (C) 2009 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Maciej W. Rozycki <macro@codesourcery.com>. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library. If not, see + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> +#include <sys/asm.h> +#include <sys/fpregdef.h> +#include <sys/regdef.h> + +#include "ucontext_i.h" + +/* int getcontext (ucontext_t *ucp) */ + + .text +LOCALSZ = 0 +MASK = 0x00000000 +#ifdef __PIC__ +LOCALSZ = 1 /* save gp */ +# if _MIPS_SIM != _ABIO32 +MASK = 0x10000000 +# endif +#endif +FRAMESZ = ((LOCALSZ * SZREG) + ALSZ) & ALMASK +GPOFF = FRAMESZ - (1 * SZREG) + +NESTED (__getcontext, FRAMESZ, ra) + .mask MASK, 0 + .fmask 0x00000000, 0 + +#ifdef __PIC__ + SETUP_GP + + move a2, sp +# define _SP a2 + +# if _MIPS_SIM != _ABIO32 + move a3, gp +# define _GP a3 +# endif + + PTR_ADDIU sp, -FRAMESZ + SETUP_GP64 (GPOFF, __getcontext) + SAVE_GP (GPOFF) + +#else /* ! __PIC__ */ +# define _SP sp +# define _GP gp + +#endif /* ! __PIC__ */ + + /* Store a magic flag. */ + li v1, 1 + REG_S v1, (0 * SZREG + MCONTEXT_GREGS)(a0) /* zero */ + + REG_S s0, (16 * SZREG + MCONTEXT_GREGS)(a0) + REG_S s1, (17 * SZREG + MCONTEXT_GREGS)(a0) + REG_S s2, (18 * SZREG + MCONTEXT_GREGS)(a0) + REG_S s3, (19 * SZREG + MCONTEXT_GREGS)(a0) + REG_S s4, (20 * SZREG + MCONTEXT_GREGS)(a0) + REG_S s5, (21 * SZREG + MCONTEXT_GREGS)(a0) + REG_S s6, (22 * SZREG + MCONTEXT_GREGS)(a0) + REG_S s7, (23 * SZREG + MCONTEXT_GREGS)(a0) +#if ! defined (__PIC__) || _MIPS_SIM != _ABIO32 + REG_S _GP, (28 * SZREG + MCONTEXT_GREGS)(a0) +#endif + REG_S _SP, (29 * SZREG + MCONTEXT_GREGS)(a0) + REG_S fp, (30 * SZREG + MCONTEXT_GREGS)(a0) + REG_S ra, (31 * SZREG + MCONTEXT_GREGS)(a0) + REG_S ra, MCONTEXT_PC(a0) + +#ifdef __mips_hard_float +# if _MIPS_SIM == _ABI64 + s.d fs0, (24 * SZREG + MCONTEXT_FPREGS)(a0) + s.d fs1, (25 * SZREG + MCONTEXT_FPREGS)(a0) + s.d fs2, (26 * SZREG + MCONTEXT_FPREGS)(a0) + s.d fs3, (27 * SZREG + MCONTEXT_FPREGS)(a0) + s.d fs4, (28 * SZREG + MCONTEXT_FPREGS)(a0) + s.d fs5, (29 * SZREG + MCONTEXT_FPREGS)(a0) + s.d fs6, (30 * SZREG + MCONTEXT_FPREGS)(a0) + s.d fs7, (31 * SZREG + MCONTEXT_FPREGS)(a0) + +# else /* _MIPS_SIM != _ABI64 */ + s.d fs0, (20 * SZREG + MCONTEXT_FPREGS)(a0) + s.d fs1, (22 * SZREG + MCONTEXT_FPREGS)(a0) + s.d fs2, (24 * SZREG + MCONTEXT_FPREGS)(a0) + s.d fs3, (26 * SZREG + MCONTEXT_FPREGS)(a0) + s.d fs4, (28 * SZREG + MCONTEXT_FPREGS)(a0) + s.d fs5, (30 * SZREG + MCONTEXT_FPREGS)(a0) + +# endif /* _MIPS_SIM != _ABI64 */ + + cfc1 v1, fcr31 + sw v1, MCONTEXT_FPC_CSR(a0) +#endif /* __mips_hard_float */ + +/* rt_sigprocmask (SIG_BLOCK, NULL, &ucp->uc_sigmask, _NSIG8) */ + li a3, _NSIG8 + PTR_ADDU a2, a0, UCONTEXT_SIGMASK + move a1, zero + li a0, SIG_BLOCK + + li v0, SYS_ify (rt_sigprocmask) + syscall + bnez a3, 99f + +#ifdef __PIC__ + RESTORE_GP64 + PTR_ADDIU sp, FRAMESZ +#endif + move v0, zero + jr ra + +99: +#ifdef __PIC__ + PTR_LA t9, JUMPTARGET (__syscall_error) + RESTORE_GP64 + PTR_ADDIU sp, FRAMESZ + jr t9 + +#else /* ! __PIC__ */ + + j JUMPTARGET (__syscall_error) +#endif /* ! __PIC__ */ +PSEUDO_END (__getcontext) + +weak_alias (__getcontext, getcontext) diff -auNr uClibc-0.9.33.2.orig/libc/sysdeps/linux/mips/kernel_rt_sigframe.h uClibc-0.9.33.2/libc/sysdeps/linux/mips/kernel_rt_sigframe.h --- uClibc-0.9.33.2.orig/libc/sysdeps/linux/mips/kernel_rt_sigframe.h 1970-01-01 08:00:00.000000000 +0800 +++ uClibc-0.9.33.2/libc/sysdeps/linux/mips/kernel_rt_sigframe.h 2017-07-12 12:00:34.373278154 +0800 @@ -0,0 +1,10 @@ +/* Linux kernel RT signal frame. */ +typedef struct kernel_rt_sigframe + { + uint32_t rs_ass[4]; + uint32_t rs_code[2]; + siginfo_t rs_info; + struct ucontext rs_uc; + uint32_t rs_altcode[8] __attribute__ ((__aligned__ (1 << 7))); + } +kernel_rt_sigframe_t; diff -auNr uClibc-0.9.33.2.orig/libc/sysdeps/linux/mips/makecontext.S uClibc-0.9.33.2/libc/sysdeps/linux/mips/makecontext.S --- uClibc-0.9.33.2.orig/libc/sysdeps/linux/mips/makecontext.S 1970-01-01 08:00:00.000000000 +0800 +++ uClibc-0.9.33.2/libc/sysdeps/linux/mips/makecontext.S 2017-07-12 10:08:49.346122734 +0800 @@ -0,0 +1,181 @@ +/* Modify saved context. + Copyright (C) 2009 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Maciej W. Rozycki <macro@codesourcery.com>. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library. If not, see + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> +#include <sys/asm.h> +#include <sys/fpregdef.h> +#include <sys/regdef.h> + +#include "ucontext_i.h" + +/* int makecontext (ucontext_t *ucp, (void *func) (), int argc, ...) */ + + .text +LOCALSZ = 0 +ARGSZ = 0 +MASK = 0x00000000 +#ifdef __PIC__ +LOCALSZ = 1 /* save gp */ +#endif +#if _MIPS_SIM != _ABIO32 +ARGSZ = 5 /* save a3-a7 */ +# ifdef __PIC__ +MASK = 0x10000000 +# endif +#endif +FRAMESZ = (((ARGSZ + LOCALSZ) * SZREG) + ALSZ) & ALMASK +GPOFF = FRAMESZ - ((ARGSZ + 1) * SZREG) +#if _MIPS_SIM != _ABIO32 +A3OFF = FRAMESZ - (5 * SZREG) /* callee-allocated */ +A4OFF = FRAMESZ - (4 * SZREG) +A5OFF = FRAMESZ - (3 * SZREG) +A6OFF = FRAMESZ - (2 * SZREG) +A7OFF = FRAMESZ - (1 * SZREG) +NARGREGS = 8 +#else +A3OFF = FRAMESZ + (3 * SZREG) /* caller-allocated */ +NARGREGS = 4 +#endif + +NESTED (__makecontext, FRAMESZ, ra) + .mask MASK, -(ARGSZ * SZREG) + .fmask 0x00000000, 0 + +98: +#ifdef __PIC__ + SETUP_GP +#endif + + PTR_ADDIU sp, -FRAMESZ + +#ifdef __PIC__ + SETUP_GP64 (GPOFF, __makecontext) + SAVE_GP (GPOFF) +#endif + + /* Store args to be passed. */ + REG_S a3, A3OFF(sp) +#if _MIPS_SIM != _ABIO32 + REG_S a4, A4OFF(sp) + REG_S a5, A5OFF(sp) + REG_S a6, A6OFF(sp) + REG_S a7, A7OFF(sp) +#endif + + /* Store a magic flag. */ + li v1, 1 + REG_S v1, (0 * SZREG + MCONTEXT_GREGS)(a0) /* zero */ + + /* Set up the stack. */ + PTR_L t0, STACK_SP(a0) + PTR_L t2, STACK_SIZE(a0) + PTR_ADDIU t1, sp, A3OFF + PTR_ADDU t0, t2 + and t0, ALMASK + blez a2, 2f /* no arguments */ + + /* Store register arguments. */ + PTR_ADDIU t2, a0, MCONTEXT_GREGS + 4 * SZREG + move t3, zero +0: + addiu t3, 1 + REG_L v1, (t1) + PTR_ADDIU t1, SZREG + REG_S v1, (t2) + PTR_ADDIU t2, SZREG + bgeu t3, a2, 2f /* all done */ + bltu t3, NARGREGS, 0b /* next */ + + /* Make room for stack arguments. */ + PTR_SUBU t2, a2, t3 + PTR_SLL t2, 3 + PTR_SUBU t0, t2 + and t0, ALMASK + + /* Store stack arguments. */ + move t2, t0 +1: + addiu t3, 1 + REG_L v1, (t1) + PTR_ADDIU t1, SZREG + REG_S v1, (t2) + PTR_ADDIU t2, SZREG + bltu t3, a2, 1b /* next */ + +2: +#if _MIPS_SIM == _ABIO32 + /* Make room for a0-a3 storage. */ + PTR_ADDIU t0, -(NARGSAVE * SZREG) +#endif + PTR_L v1, UCONTEXT_LINK(a0) +#ifdef __PIC__ + PTR_ADDIU t9, 99f - 98b +#else + PTR_LA t9, 99f +#endif + REG_S t0, (29 * SZREG + MCONTEXT_GREGS)(a0) /* sp */ + REG_S v1, (16 * SZREG + MCONTEXT_GREGS)(a0) /* s0 */ +#ifdef __PIC__ + REG_S gp, (17 * SZREG + MCONTEXT_GREGS)(a0) /* s1 */ +#endif + REG_S t9, (31 * SZREG + MCONTEXT_GREGS)(a0) /* ra */ + REG_S a1, MCONTEXT_PC(a0) + +#ifdef __PIC__ + RESTORE_GP64 + PTR_ADDIU sp, FRAMESZ +#endif + jr ra + +99: +#ifdef __PIC__ + move gp, s1 +#endif + move a0, zero + beqz s0, 0f + + /* setcontext (ucp) */ + move a0, s0 +#ifdef __PIC__ + PTR_LA t9, JUMPTARGET (__setcontext) + jalr t9 +# if _MIPS_SIM == _ABIO32 + move gp, s1 +# endif +#else + jal JUMPTARGET (__setcontext) +#endif + move a0, v0 + +0: + /* exit (a0) */ +#ifdef __PIC__ + PTR_LA t9, HIDDEN_JUMPTARGET (exit) + jalr t9 +#else + jal HIDDEN_JUMPTARGET (exit) +#endif + + /* You don't exist, you won't feel anything. */ +1: + lb zero, (zero) + b 1b +PSEUDO_END (__makecontext) + +weak_alias (__makecontext, makecontext) diff -auNr uClibc-0.9.33.2.orig/libc/sysdeps/linux/mips/Makefile.arch uClibc-0.9.33.2/libc/sysdeps/linux/mips/Makefile.arch --- uClibc-0.9.33.2.orig/libc/sysdeps/linux/mips/Makefile.arch 2012-05-15 15:20:09.000000000 +0800 +++ uClibc-0.9.33.2/libc/sysdeps/linux/mips/Makefile.arch 2017-07-12 15:07:02.852239337 +0800 @@ -20,6 +20,11 @@ SSRC += vfork.S clone.S endif +ifeq ($(UCLIBC_HAS_CONTEXT_FUNCS),y) +SSRC += makecontext.S setcontext.S getcontext.S \ + swapcontext.S +endif + ASFLAGS-syscall_error.S += -D_LIBC_REENTRANT ARCH_HEADERS := sgidefs.h diff -auNr uClibc-0.9.33.2.orig/libc/sysdeps/linux/mips/setcontext.S uClibc-0.9.33.2/libc/sysdeps/linux/mips/setcontext.S --- uClibc-0.9.33.2.orig/libc/sysdeps/linux/mips/setcontext.S 1970-01-01 08:00:00.000000000 +0800 +++ uClibc-0.9.33.2/libc/sysdeps/linux/mips/setcontext.S 2017-07-12 10:08:56.122369171 +0800 @@ -0,0 +1,184 @@ +/* Set current context. + Copyright (C) 2009 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Maciej W. Rozycki <macro@codesourcery.com>. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library. If not, see + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> +#include <sys/asm.h> +#include <sys/fpregdef.h> +#include <sys/regdef.h> + +#include "ucontext_i.h" + +/* int setcontext (const ucontext_t *ucp) */ + + .text +LOCALSZ = 0 +ARGSZ = 0 +MASK = 0x00000000 +#ifdef __PIC__ +LOCALSZ = 1 /* save gp */ +#endif +#if _MIPS_SIM != _ABIO32 +ARGSZ = 1 /* save a0 */ +# ifdef __PIC__ +MASK = 0x10000000 +# endif +#endif +FRAMESZ = (((ARGSZ + LOCALSZ) * SZREG) + ALSZ) & ALMASK +GPOFF = FRAMESZ - ((ARGSZ + 1) * SZREG) +#if _MIPS_SIM != _ABIO32 +A0OFF = FRAMESZ - (1 * SZREG) /* callee-allocated */ +#else +A0OFF = FRAMESZ + (0 * SZREG) /* caller-allocated */ +#endif + +NESTED (__setcontext, FRAMESZ, ra) + .mask MASK, -(ARGSZ * SZREG) + .fmask 0x00000000, 0 + +#ifdef __PIC__ + SETUP_GP +#endif + + PTR_ADDIU sp, -FRAMESZ + +#ifdef __PIC__ + SETUP_GP64 (GPOFF, __setcontext) + SAVE_GP (GPOFF) +#endif + + /* Check for the magic flag. */ + li v0, 1 + REG_L v1, (0 * SZREG + MCONTEXT_GREGS)(a0) /* zero */ + bne v0, v1, 98f + + REG_S a0, A0OFF(sp) + +/* rt_sigprocmask (SIG_SETMASK, &ucp->uc_sigmask, NULL, _NSIG8) */ + li a3, _NSIG8 + move a2, zero + PTR_ADDU a1, a0, UCONTEXT_SIGMASK + li a0, SIG_SETMASK + + li v0, SYS_ify (rt_sigprocmask) + syscall + bnez a3, 99f + + REG_L v0, A0OFF(sp) + +#ifdef __mips_hard_float +# if _MIPS_SIM == _ABI64 + l.d fs0, (24 * SZREG + MCONTEXT_FPREGS)(v0) + l.d fs1, (25 * SZREG + MCONTEXT_FPREGS)(v0) + l.d fs2, (26 * SZREG + MCONTEXT_FPREGS)(v0) + l.d fs3, (27 * SZREG + MCONTEXT_FPREGS)(v0) + l.d fs4, (28 * SZREG + MCONTEXT_FPREGS)(v0) + l.d fs5, (29 * SZREG + MCONTEXT_FPREGS)(v0) + l.d fs6, (30 * SZREG + MCONTEXT_FPREGS)(v0) + l.d fs7, (31 * SZREG + MCONTEXT_FPREGS)(v0) + +# else /* _MIPS_SIM != _ABI64 */ + l.d fs0, (20 * SZREG + MCONTEXT_FPREGS)(v0) + l.d fs1, (22 * SZREG + MCONTEXT_FPREGS)(v0) + l.d fs2, (24 * SZREG + MCONTEXT_FPREGS)(v0) + l.d fs3, (26 * SZREG + MCONTEXT_FPREGS)(v0) + l.d fs4, (28 * SZREG + MCONTEXT_FPREGS)(v0) + l.d fs5, (30 * SZREG + MCONTEXT_FPREGS)(v0) + +# endif /* _MIPS_SIM != _ABI64 */ + + lw v1, MCONTEXT_FPC_CSR(v0) + ctc1 v1, fcr31 +#endif /* __mips_hard_float */ + + /* Note the contents of argument registers will be random + unless makecontext() has been called. */ + REG_L a0, (4 * SZREG + MCONTEXT_GREGS)(v0) + REG_L a1, (5 * SZREG + MCONTEXT_GREGS)(v0) + REG_L a2, (6 * SZREG + MCONTEXT_GREGS)(v0) + REG_L a3, (7 * SZREG + MCONTEXT_GREGS)(v0) +#if _MIPS_SIM != _ABIO32 + REG_L a4, (8 * SZREG + MCONTEXT_GREGS)(v0) + REG_L a5, (9 * SZREG + MCONTEXT_GREGS)(v0) + REG_L a6, (10 * SZREG + MCONTEXT_GREGS)(v0) + REG_L a7, (11 * SZREG + MCONTEXT_GREGS)(v0) +#endif + + REG_L s0, (16 * SZREG + MCONTEXT_GREGS)(v0) + REG_L s1, (17 * SZREG + MCONTEXT_GREGS)(v0) + REG_L s2, (18 * SZREG + MCONTEXT_GREGS)(v0) + REG_L s3, (19 * SZREG + MCONTEXT_GREGS)(v0) + REG_L s4, (20 * SZREG + MCONTEXT_GREGS)(v0) + REG_L s5, (21 * SZREG + MCONTEXT_GREGS)(v0) + REG_L s6, (22 * SZREG + MCONTEXT_GREGS)(v0) + REG_L s7, (23 * SZREG + MCONTEXT_GREGS)(v0) +#if ! defined (__PIC__) || _MIPS_SIM != _ABIO32 + REG_L gp, (28 * SZREG + MCONTEXT_GREGS)(v0) +#endif + REG_L sp, (29 * SZREG + MCONTEXT_GREGS)(v0) + REG_L fp, (30 * SZREG + MCONTEXT_GREGS)(v0) + REG_L ra, (31 * SZREG + MCONTEXT_GREGS)(v0) + REG_L t9, MCONTEXT_PC(v0) + + move v0, zero + jr t9 + +98: + /* This is a context obtained from a signal handler. + Perform a full restore by pushing the context + passed onto a simulated signal frame on the stack + and call the signal return syscall as if a signal + handler exited normally. */ + PTR_ADDIU sp, -((RT_SIGFRAME_SIZE + ALSZ) & ALMASK) + + /* Only ucontext is referred to from rt_sigreturn, + copy it. */ + PTR_ADDIU t1, sp, RT_SIGFRAME_UCONTEXT + li t3, ((UCONTEXT_SIZE + SZREG - 1) / SZREG) - 1 +0: + REG_L t2, (a0) + PTR_ADDIU a0, SZREG + REG_S t2, (t1) + PTR_ADDIU t1, SZREG + .set noreorder + bgtz t3, 0b + addiu t3, -1 + .set reorder + +/* rt_sigreturn () -- no arguments, sp points to struct rt_sigframe. */ + li v0, SYS_ify (rt_sigreturn) + syscall + + /* Restore the stack and fall through to the error + path. Successful rt_sigreturn never returns to + its calling place. */ + PTR_ADDIU sp, ((RT_SIGFRAME_SIZE + ALSZ) & ALMASK) +99: +#ifdef __PIC__ + PTR_LA t9, JUMPTARGET (__syscall_error) + RESTORE_GP64 + PTR_ADDIU sp, FRAMESZ + jr t9 + +#else /* ! __PIC__ */ + + j JUMPTARGET (__syscall_error) +#endif /* ! __PIC__ */ +PSEUDO_END (__setcontext) + +weak_alias (__setcontext, setcontext) diff -auNr uClibc-0.9.33.2.orig/libc/sysdeps/linux/mips/swapcontext.S uClibc-0.9.33.2/libc/sysdeps/linux/mips/swapcontext.S --- uClibc-0.9.33.2.orig/libc/sysdeps/linux/mips/swapcontext.S 1970-01-01 08:00:00.000000000 +0800 +++ uClibc-0.9.33.2/libc/sysdeps/linux/mips/swapcontext.S 2017-07-12 10:09:03.159317602 +0800 @@ -0,0 +1,204 @@ +/* Save and set current context. + Copyright (C) 2009 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Maciej W. Rozycki <macro@codesourcery.com>. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library. If not, see + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> +#include <sys/asm.h> +#include <sys/fpregdef.h> +#include <sys/regdef.h> + +#include "ucontext_i.h" + +/* int swapcontext (ucontext_t *oucp, const ucontext_t *ucp) */ + + .text +LOCALSZ = 0 +ARGSZ = 0 +MASK = 0x00000000 +#ifdef __PIC__ +LOCALSZ = 1 /* save gp */ +#endif +#if _MIPS_SIM != _ABIO32 +ARGSZ = 1 /* save a1 */ +# ifdef __PIC__ +MASK = 0x10000000 +# endif +#endif +FRAMESZ = (((ARGSZ + LOCALSZ) * SZREG) + ALSZ) & ALMASK +GPOFF = FRAMESZ - ((ARGSZ + 1) * SZREG) +#if _MIPS_SIM != _ABIO32 +A1OFF = FRAMESZ - (1 * SZREG) /* callee-allocated */ +#else +A1OFF = FRAMESZ + (1 * SZREG) /* caller-allocated */ +#endif + +NESTED (__swapcontext, FRAMESZ, ra) + .mask MASK, -(ARGSZ * SZREG) + .fmask 0x00000000, 0 + +#ifdef __PIC__ + SETUP_GP + + move a2, sp +# define _SP a2 + +# if _MIPS_SIM != _ABIO32 + move a3, gp +# define _GP a3 +# endif + + PTR_ADDIU sp, -FRAMESZ + SETUP_GP64 (GPOFF, __swapcontext) + SAVE_GP (GPOFF) + +#else /* ! __PIC__ */ +# define _SP sp +# define _GP gp + +#endif /* ! __PIC__ */ + + /* Store a magic flag. */ + li v1, 1 + REG_S v1, (0 * SZREG + MCONTEXT_GREGS)(a0) /* zero */ + + REG_S s0, (16 * SZREG + MCONTEXT_GREGS)(a0) + REG_S s1, (17 * SZREG + MCONTEXT_GREGS)(a0) + REG_S s2, (18 * SZREG + MCONTEXT_GREGS)(a0) + REG_S s3, (19 * SZREG + MCONTEXT_GREGS)(a0) + REG_S s4, (20 * SZREG + MCONTEXT_GREGS)(a0) + REG_S s5, (21 * SZREG + MCONTEXT_GREGS)(a0) + REG_S s6, (22 * SZREG + MCONTEXT_GREGS)(a0) + REG_S s7, (23 * SZREG + MCONTEXT_GREGS)(a0) +#if ! defined (__PIC__) || _MIPS_SIM != _ABIO32 + REG_S _GP, (28 * SZREG + MCONTEXT_GREGS)(a0) +#endif + REG_S _SP, (29 * SZREG + MCONTEXT_GREGS)(a0) + REG_S fp, (30 * SZREG + MCONTEXT_GREGS)(a0) + REG_S ra, (31 * SZREG + MCONTEXT_GREGS)(a0) + REG_S ra, MCONTEXT_PC(a0) + +#ifdef __mips_hard_float +# if _MIPS_SIM == _ABI64 + s.d fs0, (24 * SZREG + MCONTEXT_FPREGS)(a0) + s.d fs1, (25 * SZREG + MCONTEXT_FPREGS)(a0) + s.d fs2, (26 * SZREG + MCONTEXT_FPREGS)(a0) + s.d fs3, (27 * SZREG + MCONTEXT_FPREGS)(a0) + s.d fs4, (28 * SZREG + MCONTEXT_FPREGS)(a0) + s.d fs5, (29 * SZREG + MCONTEXT_FPREGS)(a0) + s.d fs6, (30 * SZREG + MCONTEXT_FPREGS)(a0) + s.d fs7, (31 * SZREG + MCONTEXT_FPREGS)(a0) + +# else /* _MIPS_SIM != _ABI64 */ + s.d fs0, (20 * SZREG + MCONTEXT_FPREGS)(a0) + s.d fs1, (22 * SZREG + MCONTEXT_FPREGS)(a0) + s.d fs2, (24 * SZREG + MCONTEXT_FPREGS)(a0) + s.d fs3, (26 * SZREG + MCONTEXT_FPREGS)(a0) + s.d fs4, (28 * SZREG + MCONTEXT_FPREGS)(a0) + s.d fs5, (30 * SZREG + MCONTEXT_FPREGS)(a0) + +# endif /* _MIPS_SIM != _ABI64 */ + + cfc1 v1, fcr31 + sw v1, MCONTEXT_FPC_CSR(a0) +#endif /* __mips_hard_float */ + + REG_S a1, A1OFF(sp) + +/* rt_sigprocmask (SIG_SETMASK, &ucp->uc_sigmask, &oucp->uc_sigmask, _NSIG8) */ + li a3, _NSIG8 + PTR_ADDU a2, a0, UCONTEXT_SIGMASK + PTR_ADDU a1, a1, UCONTEXT_SIGMASK + li a0, SIG_SETMASK + + li v0, SYS_ify (rt_sigprocmask) + syscall + bnez a3, 99f + + REG_L v0, A1OFF(sp) + +#ifdef __mips_hard_float +# if _MIPS_SIM == _ABI64 + l.d fs0, (24 * SZREG + MCONTEXT_FPREGS)(v0) + l.d fs1, (25 * SZREG + MCONTEXT_FPREGS)(v0) + l.d fs2, (26 * SZREG + MCONTEXT_FPREGS)(v0) + l.d fs3, (27 * SZREG + MCONTEXT_FPREGS)(v0) + l.d fs4, (28 * SZREG + MCONTEXT_FPREGS)(v0) + l.d fs5, (29 * SZREG + MCONTEXT_FPREGS)(v0) + l.d fs6, (30 * SZREG + MCONTEXT_FPREGS)(v0) + l.d fs7, (31 * SZREG + MCONTEXT_FPREGS)(v0) + +# else /* _MIPS_SIM != _ABI64 */ + l.d fs0, (20 * SZREG + MCONTEXT_FPREGS)(v0) + l.d fs1, (22 * SZREG + MCONTEXT_FPREGS)(v0) + l.d fs2, (24 * SZREG + MCONTEXT_FPREGS)(v0) + l.d fs3, (26 * SZREG + MCONTEXT_FPREGS)(v0) + l.d fs4, (28 * SZREG + MCONTEXT_FPREGS)(v0) + l.d fs5, (30 * SZREG + MCONTEXT_FPREGS)(v0) + +# endif /* _MIPS_SIM != _ABI64 */ + + lw v1, MCONTEXT_FPC_CSR(v0) + ctc1 v1, fcr31 +#endif /* __mips_hard_float */ + + /* Note the contents of argument registers will be random + unless makecontext() has been called. */ + REG_L a0, (4 * SZREG + MCONTEXT_GREGS)(v0) + REG_L a1, (5 * SZREG + MCONTEXT_GREGS)(v0) + REG_L a2, (6 * SZREG + MCONTEXT_GREGS)(v0) + REG_L a3, (7 * SZREG + MCONTEXT_GREGS)(v0) +#if _MIPS_SIM != _ABIO32 + REG_L a4, (8 * SZREG + MCONTEXT_GREGS)(v0) + REG_L a5, (9 * SZREG + MCONTEXT_GREGS)(v0) + REG_L a6, (10 * SZREG + MCONTEXT_GREGS)(v0) + REG_L a7, (11 * SZREG + MCONTEXT_GREGS)(v0) +#endif + + REG_L s0, (16 * SZREG + MCONTEXT_GREGS)(v0) + REG_L s1, (17 * SZREG + MCONTEXT_GREGS)(v0) + REG_L s2, (18 * SZREG + MCONTEXT_GREGS)(v0) + REG_L s3, (19 * SZREG + MCONTEXT_GREGS)(v0) + REG_L s4, (20 * SZREG + MCONTEXT_GREGS)(v0) + REG_L s5, (21 * SZREG + MCONTEXT_GREGS)(v0) + REG_L s6, (22 * SZREG + MCONTEXT_GREGS)(v0) + REG_L s7, (23 * SZREG + MCONTEXT_GREGS)(v0) +#if ! defined (__PIC__) || _MIPS_SIM != _ABIO32 + REG_L gp, (28 * SZREG + MCONTEXT_GREGS)(v0) +#endif + REG_L sp, (29 * SZREG + MCONTEXT_GREGS)(v0) + REG_L fp, (30 * SZREG + MCONTEXT_GREGS)(v0) + REG_L ra, (31 * SZREG + MCONTEXT_GREGS)(v0) + REG_L t9, MCONTEXT_PC(v0) + + move v0, zero + jr t9 + +99: +#ifdef __PIC__ + PTR_LA t9, JUMPTARGET (__syscall_error) + RESTORE_GP64 + PTR_ADDIU sp, FRAMESZ + jr t9 + +#else /* ! __PIC__ */ + + j JUMPTARGET (__syscall_error) +#endif /* ! __PIC__ */ +PSEUDO_END (__swapcontext) + +weak_alias (__swapcontext, swapcontext) diff -auNr uClibc-0.9.33.2.orig/libc/sysdeps/linux/mips/ucontext_i.sym uClibc-0.9.33.2/libc/sysdeps/linux/mips/ucontext_i.sym --- uClibc-0.9.33.2.orig/libc/sysdeps/linux/mips/ucontext_i.sym 1970-01-01 08:00:00.000000000 +0800 +++ uClibc-0.9.33.2/libc/sysdeps/linux/mips/ucontext_i.sym 2017-07-12 10:09:06.933480311 +0800 @@ -0,0 +1,52 @@ +#include <inttypes.h> +#include <signal.h> +#include <stddef.h> +#include <sys/ucontext.h> + +#include <kernel_rt_sigframe.h> + +-- Constants used by the rt_sigprocmask call. + +SIG_BLOCK +SIG_SETMASK + +_NSIG8 (_NSIG / 8) + +-- Offsets of the fields in the kernel rt_sigframe_t structure. +#define rt_sigframe(member) offsetof (kernel_rt_sigframe_t, member) + +RT_SIGFRAME_UCONTEXT rt_sigframe (rs_uc) + +RT_SIGFRAME_SIZE sizeof (kernel_rt_sigframe_t) + +-- Offsets of the fields in the ucontext_t structure. +#define ucontext(member) offsetof (ucontext_t, member) +#define stack(member) ucontext (uc_stack.member) +#define mcontext(member) ucontext (uc_mcontext.member) + +UCONTEXT_FLAGS ucontext (uc_flags) +UCONTEXT_LINK ucontext (uc_link) +UCONTEXT_STACK ucontext (uc_stack) +UCONTEXT_MCONTEXT ucontext (uc_mcontext) +UCONTEXT_SIGMASK ucontext (uc_sigmask) + +STACK_SP stack (ss_sp) +STACK_SIZE stack (ss_size) +STACK_FLAGS stack (ss_flags) + +MCONTEXT_GREGS mcontext (gregs) +MCONTEXT_FPREGS mcontext (fpregs) +MCONTEXT_MDHI mcontext (mdhi) +MCONTEXT_HI1 mcontext (hi1) +MCONTEXT_HI2 mcontext (hi2) +MCONTEXT_HI3 mcontext (hi3) +MCONTEXT_MDLO mcontext (mdlo) +MCONTEXT_LO1 mcontext (lo1) +MCONTEXT_LO2 mcontext (lo2) +MCONTEXT_LO3 mcontext (lo3) +MCONTEXT_PC mcontext (pc) +MCONTEXT_FPC_CSR mcontext (fpc_csr) +MCONTEXT_USED_MATH mcontext (used_math) +MCONTEXT_DSP mcontext (dsp) + +UCONTEXT_SIZE sizeof (ucontext_t) diff -auNr uClibc-0.9.33.2.orig/libc/sysdeps/linux/sparc/getcontext.S uClibc-0.9.33.2/libc/sysdeps/linux/sparc/getcontext.S --- uClibc-0.9.33.2.orig/libc/sysdeps/linux/sparc/getcontext.S 1970-01-01 08:00:00.000000000 +0800 +++ uClibc-0.9.33.2/libc/sysdeps/linux/sparc/getcontext.S 2017-07-12 10:16:48.516671818 +0800 @@ -0,0 +1,84 @@ +/* Save current context. + Copyright (C) 2008-2016 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by David S. Miller <davem@davemloft.net>, 2008. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> + +#include "ucontext_i.h" + +/* int __getcontext (ucontext_t *ucp) + + Saves the machine context in UCP such that when it is activated, + it appears as if __getcontext() returned again. + + This implementation is intended to be used for *synchronous* context + switches only. Therefore, it does not have to save anything + other than the PRESERVED state. */ + + +ENTRY(__getcontext) + save %sp, -112, %sp + st %g0, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_PSR] + + /* In reality, we only use the GREG_PC value when setting + or swapping contexts. But we fill in NPC for completeness. */ + add %i7, 8, %o0 + st %o0, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_PC] + add %o0, 4, %o0 + st %o0, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_NPC] + + rd %y, %o1 + st %o1, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_Y] + + st %g1, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G1] + st %g2, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G2] + st %g3, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G3] + st %g4, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G4] + st %g5, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G5] + st %g6, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G6] + st %g7, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G7] + + mov SIG_BLOCK, %o0 + clr %o1 + add %i0, UC_SIGMASK, %o2 + mov 8, %o3 + mov __NR_rt_sigprocmask, %g1 + ta 0x10 + + /* Zero, success, return value. */ + st %g0, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O0] + st %i1, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O1] + st %i2, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O2] + st %i3, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O3] + st %i4, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O4] + st %i5, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O5] + st %i6, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O6] + st %i7, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O7] + + st %g0, [%i0 + UC_MCONTEXT + MC_GWINS] + + /* Do not save FPU state, it is volatile across calls. */ + stb %g0, [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_EN] + + st %g0, [%i0 + UC_MCONTEXT + MC_XRS + XRS_ID] + st %g0, [%i0 + UC_MCONTEXT + MC_XRS + XRS_PTR] + jmpl %i7 + 8, %g0 + restore %g0, %g0, %o0 +END(__getcontext) + +weak_alias (__getcontext, getcontext) diff -auNr uClibc-0.9.33.2.orig/libc/sysdeps/linux/sparc/makecontext.c uClibc-0.9.33.2/libc/sysdeps/linux/sparc/makecontext.c --- uClibc-0.9.33.2.orig/libc/sysdeps/linux/sparc/makecontext.c 1970-01-01 08:00:00.000000000 +0800 +++ uClibc-0.9.33.2/libc/sysdeps/linux/sparc/makecontext.c 2017-07-12 10:17:56.762437575 +0800 @@ -0,0 +1,92 @@ +/* Create new context. + Copyright (C) 2008-2016 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by David S. Miller <davem@davemloft.net>, 2008. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> +#include <stdarg.h> +#include <stdint.h> +#include <ucontext.h> + +/* Sets up the outgoing arguments and the program counter for a user + context for the requested function call. + + Returning to the correct parent context is pretty simple on + Sparc. We only need to link up the register windows correctly. + Since global registers are clobbered by calls, we need not be + concerned about those, and thus is all could be worked out without + using a trampoline. + + Except that we must deal with the signal mask, thus a trampoline + is unavoidable. 32-bit stackframe layout: + +-----------------------------------------+ + | 7th and further parameters | + +-----------------------------------------+ + | backup storage for initial 6 parameters | + +-----------------------------------------+ + | struct return pointer | + +-----------------------------------------+ + | 8 incoming registers | + +-----------------------------------------+ + | 8 local registers | + %sp --> +-----------------------------------------+ + +*/ + +void +__makecontext (ucontext_t *ucp, void (*func) (void), int argc, ...) +{ + extern void __start_context (void); + unsigned long int *sp; + va_list ap; + int i; + + sp = (unsigned long int *) (ucp->uc_stack.ss_sp + ucp->uc_stack.ss_size); + sp -= 16 + 7 + argc; + sp = (unsigned long int *) (((uintptr_t) sp) & ~(8 - 1)); + + for (i = 0; i < 8; i++) + sp[i + 8] = ucp->uc_mcontext.gregs[REG_O0 + i]; + + /* The struct return pointer is essentially unused, so we can + place the link there. */ + sp[16] = (unsigned long int) ucp->uc_link; + + va_start (ap, argc); + + /* Fill in outgoing arguments, including those which will + end up being passed on the stack. */ + for (i = 0; i < argc; i++) + { + unsigned long int arg = va_arg (ap, unsigned long int); + if (i < 6) + ucp->uc_mcontext.gregs[REG_O0 + i] = arg; + else + sp[i + 23 - 6] = arg; + } + + va_end (ap); + + ucp->uc_mcontext.gregs[REG_O6] = (unsigned long int) sp; + + ucp->uc_mcontext.gregs[REG_O7] = ((unsigned long int) __start_context) - 8; + + ucp->uc_mcontext.gregs[REG_PC] = (unsigned long int) func; + ucp->uc_mcontext.gregs[REG_nPC] = ucp->uc_mcontext.gregs[REG_PC] + 4; +} + +weak_alias (__makecontext, makecontext) diff -auNr uClibc-0.9.33.2.orig/libc/sysdeps/linux/sparc/Makefile.arch uClibc-0.9.33.2/libc/sysdeps/linux/sparc/Makefile.arch --- uClibc-0.9.33.2.orig/libc/sysdeps/linux/sparc/Makefile.arch 2012-05-15 15:20:09.000000000 +0800 +++ uClibc-0.9.33.2/libc/sysdeps/linux/sparc/Makefile.arch 2017-07-12 10:57:16.335050584 +0800 @@ -15,6 +15,12 @@ SSRC += fork.S vfork.S clone.S endif + +ifeq ($(UCLIBC_HAS_CONTEXT_FUNCS),y) +CSRC += makecontext.c +SSRC += getcontext.S setcontext.S swapcontext.S +endif + # check weather __LONG_DOUBLE_128__ is defined (long double support) UCLIBC_SPARC_HAS_LONG_DOUBLE=$(shell if [ "x`$(CC) -E -dM -xc /dev/null 2>&1 | grep __LONG_DOUBLE_128__`" != "x" ]; then echo "y"; fi) ifeq ($(UCLIBC_SPARC_HAS_LONG_DOUBLE),y) diff -auNr uClibc-0.9.33.2.orig/libc/sysdeps/linux/sparc/setcontext.S uClibc-0.9.33.2/libc/sysdeps/linux/sparc/setcontext.S --- uClibc-0.9.33.2.orig/libc/sysdeps/linux/sparc/setcontext.S 1970-01-01 08:00:00.000000000 +0800 +++ uClibc-0.9.33.2/libc/sysdeps/linux/sparc/setcontext.S 2017-07-12 10:17:49.947085839 +0800 @@ -0,0 +1,118 @@ +/* Install given context. + Copyright (C) 2008-2016 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by David S. Miller <davem@davemloft.net>, 2008. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> + +#include "ucontext_i.h" + +#define ST_FLUSH_WINDOWS 3 + +/* int __setcontext (const ucontext_t *ucp) + + Restores the machine context in UCP and thereby resumes execution + in that context. + + This implementation is intended to be used for *synchronous* context + switches only. Therefore, it does not have to restore anything + other than the PRESERVED state. */ + +ENTRY(__setcontext) + save %sp, -112, %sp + + mov SIG_SETMASK, %o0 + add %i0, UC_SIGMASK, %o1 + clr %o2 + mov 8, %o3 + mov __NR_rt_sigprocmask, %g1 + ta 0x10 + + /* This is a bit on the expensive side, and we could optimize + the unwind similar to how the 32-bit sparc longjmp code + does if performance of this routine really matters. */ + ta ST_FLUSH_WINDOWS + + ldub [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_EN], %g1 + cmp %g1, 0 + be 1f + nop + ld [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_FSR], %fsr + ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D0], %f0 + ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D2], %f2 + ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D4], %f4 + ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D6], %f6 + ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D8], %f8 + ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D10], %f10 + ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D12], %f12 + ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D14], %f14 + ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D16], %f16 + ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D18], %f18 + ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D20], %f20 + ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D22], %f22 + ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D24], %f24 + ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D26], %f26 + ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D28], %f28 + ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D30], %f30 +1: + ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_Y], %g1 + wr %g1, 0x0, %y + + /* We specifically do not restore %g1 since we need it here as + a temporary. */ + ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G2], %g2 + ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G3], %g3 + ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G4], %g4 + ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G5], %g5 + ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G6], %g6 + ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G7], %g7 + ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O1], %i1 + ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O2], %i2 + ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O3], %i3 + ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O4], %i4 + ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O5], %i5 + ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O6], %i6 + restore + ld [%o0 + UC_MCONTEXT + MC_GREGS + GREG_O7], %o7 + ld [%o0 + UC_MCONTEXT + MC_GREGS + GREG_PC], %g1 + jmpl %g1, %g0 + ld [%o0 + UC_MCONTEXT + MC_GREGS + GREG_O0], %o0 +END(__setcontext) + +weak_alias (__setcontext, setcontext) + +/* This is the helper code which gets called if a function which is + registered with 'makecontext' returns. In this case we have to + install the context listed in the uc_link element of the context + 'makecontext' manipulated at the time of the 'makecontext' call. + If the pointer is NULL the process must terminate. */ + +ENTRY(__start_context) + ld [%sp + (16 * 4)], %g1 + cmp %g1, 0 + be,a 1f + clr %o0 + call __setcontext + mov %g1, %o0 + /* If this returns (which can happen if the syscall fails) we'll + exit the program with the return error value (-1). */ +1: call HIDDEN_JUMPTARGET(exit) + nop + /* The 'exit' call should never return. In case it does cause + the process to terminate. */ + unimp +END(__start_context) diff -auNr uClibc-0.9.33.2.orig/libc/sysdeps/linux/sparc/swapcontext.S uClibc-0.9.33.2/libc/sysdeps/linux/sparc/swapcontext.S --- uClibc-0.9.33.2.orig/libc/sysdeps/linux/sparc/swapcontext.S 1970-01-01 08:00:00.000000000 +0800 +++ uClibc-0.9.33.2/libc/sysdeps/linux/sparc/swapcontext.S 2017-07-12 10:18:03.383265516 +0800 @@ -0,0 +1,118 @@ +/* Save current context and install the given one. + Copyright (C) 2008-2016 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by David S. Miller <davem@davemloft.net>, 2008. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> + +#include "ucontext_i.h" + +#define ST_FLUSH_WINDOWS 3 + +/* int __swapcontext (ucontext_t *oucp, const ucontext_t *ucp); + + Saves the machine context in oucp such that when it is activated, + it appears as if __swapcontext() returned again, restores the + machine context in ucp and thereby resumes execution in that + context. + + This implementation is intended to be used for *synchronous* context + switches only. Therefore, it does not have to save anything + other than the PRESERVED state. */ + +ENTRY(__swapcontext) + save %sp, -112, %sp + ta ST_FLUSH_WINDOWS + st %g0, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_PSR] + add %i7, 8, %o0 + st %o0, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_PC] + add %o0, 4, %o0 + st %o0, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_NPC] + rd %y, %o1 + st %o1, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_Y] + st %g1, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G1] + st %g2, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G2] + st %g3, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G3] + st %g4, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G4] + st %g5, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G5] + st %g6, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G6] + st %g7, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G7] + st %g0, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O0] + st %i1, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O1] + st %i2, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O2] + st %i3, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O3] + st %i4, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O4] + st %i5, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O5] + st %i6, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O6] + st %i7, [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O7] + st %g0, [%i0 + UC_MCONTEXT + MC_GWINS] + stb %g0, [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_EN] + st %g0, [%i0 + UC_MCONTEXT + MC_XRS + XRS_ID] + st %g0, [%i0 + UC_MCONTEXT + MC_XRS + XRS_PTR] + + mov SIG_SETMASK, %o0 + add %i1, UC_SIGMASK, %o1 + add %i0, UC_SIGMASK, %o2 + mov 8, %o3 + mov __NR_rt_sigprocmask, %g1 + ta 0x10 + + mov %i1, %i0 + ldub [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_EN], %g1 + cmp %g1, 0 + be 1f + nop + ld [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_FSR], %fsr + ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D0], %f0 + ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D2], %f2 + ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D4], %f4 + ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D6], %f6 + ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D8], %f8 + ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D10], %f10 + ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D12], %f12 + ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D14], %f14 + ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D16], %f16 + ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D18], %f18 + ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D20], %f20 + ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D22], %f22 + ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D24], %f24 + ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D26], %f26 + ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D28], %f28 + ldd [%i0 + UC_MCONTEXT + MC_FPREGS + FPU_D30], %f30 +1: + ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_Y], %g1 + wr %g1, 0x0, %y + ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G2], %g2 + ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G3], %g3 + ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G4], %g4 + ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G5], %g5 + ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G6], %g6 + ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_G7], %g7 + ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O1], %i1 + ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O2], %i2 + ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O3], %i3 + ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O4], %i4 + ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O5], %i5 + ld [%i0 + UC_MCONTEXT + MC_GREGS + GREG_O6], %i6 + restore + ld [%o0 + UC_MCONTEXT + MC_GREGS + GREG_O7], %o7 + ld [%o0 + UC_MCONTEXT + MC_GREGS + GREG_PC], %g1 + jmpl %g1, %g0 + ld [%o0 + UC_MCONTEXT + MC_GREGS + GREG_O0], %o0 +END(__swapcontext) + +weak_alias (__swapcontext, swapcontext) diff -auNr uClibc-0.9.33.2.orig/libc/sysdeps/linux/sparc/ucontext_i.sym uClibc-0.9.33.2/libc/sysdeps/linux/sparc/ucontext_i.sym --- uClibc-0.9.33.2.orig/libc/sysdeps/linux/sparc/ucontext_i.sym 1970-01-01 08:00:00.000000000 +0800 +++ uClibc-0.9.33.2/libc/sysdeps/linux/sparc/ucontext_i.sym 2017-07-12 10:18:08.675515988 +0800 @@ -0,0 +1,61 @@ +#include <stddef.h> +#include <signal.h> +#include <sys/ucontext.h> + +-- + +SIG_BLOCK +SIG_SETMASK + +UC_FLAGS offsetof (ucontext_t, uc_flags) +UC_LINK offsetof (ucontext_t, uc_link) +UC_SIGMASK offsetof (ucontext_t, uc_sigmask) +UC_STACK offsetof (ucontext_t, uc_stack) +UC_MCONTEXT offsetof (ucontext_t, uc_mcontext) +MC_GREGS offsetof (mcontext_t, gregs) +MC_GWINS offsetof (mcontext_t, gwins) +MC_FPREGS offsetof (mcontext_t, fpregs) +MC_XRS offsetof (mcontext_t, xrs) +MC_FILLER offsetof (mcontext_t, filler) +GREG_PSR (REG_PSR * sizeof(greg_t)) +GREG_PC (REG_PC * sizeof(greg_t)) +GREG_NPC (REG_nPC * sizeof(greg_t)) +GREG_Y (REG_Y * sizeof(greg_t)) +GREG_G1 (REG_G1 * sizeof(greg_t)) +GREG_G2 (REG_G2 * sizeof(greg_t)) +GREG_G3 (REG_G3 * sizeof(greg_t)) +GREG_G4 (REG_G4 * sizeof(greg_t)) +GREG_G5 (REG_G5 * sizeof(greg_t)) +GREG_G6 (REG_G6 * sizeof(greg_t)) +GREG_G7 (REG_G7 * sizeof(greg_t)) +GREG_O0 (REG_O0 * sizeof(greg_t)) +GREG_O1 (REG_O1 * sizeof(greg_t)) +GREG_O2 (REG_O2 * sizeof(greg_t)) +GREG_O3 (REG_O3 * sizeof(greg_t)) +GREG_O4 (REG_O4 * sizeof(greg_t)) +GREG_O5 (REG_O5 * sizeof(greg_t)) +GREG_O6 (REG_O6 * sizeof(greg_t)) +GREG_O7 (REG_O7 * sizeof(greg_t)) +FPU_D0 offsetof (fpregset_t, fpu_fr.fpu_dregs[0]) +FPU_D2 offsetof (fpregset_t, fpu_fr.fpu_dregs[1]) +FPU_D4 offsetof (fpregset_t, fpu_fr.fpu_dregs[2]) +FPU_D6 offsetof (fpregset_t, fpu_fr.fpu_dregs[3]) +FPU_D8 offsetof (fpregset_t, fpu_fr.fpu_dregs[4]) +FPU_D10 offsetof (fpregset_t, fpu_fr.fpu_dregs[5]) +FPU_D12 offsetof (fpregset_t, fpu_fr.fpu_dregs[6]) +FPU_D14 offsetof (fpregset_t, fpu_fr.fpu_dregs[7]) +FPU_D16 offsetof (fpregset_t, fpu_fr.fpu_dregs[8]) +FPU_D18 offsetof (fpregset_t, fpu_fr.fpu_dregs[9]) +FPU_D20 offsetof (fpregset_t, fpu_fr.fpu_dregs[10]) +FPU_D22 offsetof (fpregset_t, fpu_fr.fpu_dregs[11]) +FPU_D24 offsetof (fpregset_t, fpu_fr.fpu_dregs[12]) +FPU_D26 offsetof (fpregset_t, fpu_fr.fpu_dregs[13]) +FPU_D28 offsetof (fpregset_t, fpu_fr.fpu_dregs[14]) +FPU_D30 offsetof (fpregset_t, fpu_fr.fpu_dregs[15]) +FPU_Q offsetof (fpregset_t, fpu_q) +FPU_FSR offsetof (fpregset_t, fpu_fsr) +FPU_QCNT offsetof (fpregset_t, fpu_qcnt) +FPU_Q_ENTRY_SZ offsetof (fpregset_t, fpu_q_entrysize) +FPU_EN offsetof (fpregset_t, fpu_en) +XRS_ID offsetof (xrs_t, xrs_id) +XRS_PTR offsetof (xrs_t, xrs_ptr) diff -auNr uClibc-0.9.33.2.orig/libc/sysdeps/linux/x86_64/getcontext.S uClibc-0.9.33.2/libc/sysdeps/linux/x86_64/getcontext.S --- uClibc-0.9.33.2.orig/libc/sysdeps/linux/x86_64/getcontext.S 1970-01-01 08:00:00.000000000 +0800 +++ uClibc-0.9.33.2/libc/sysdeps/linux/x86_64/getcontext.S 2017-07-12 10:20:37.753940299 +0800 @@ -0,0 +1,88 @@ +/* Save current context. + Copyright (C) 2002-2012 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Andreas Jaeger <aj@suse.de>, 2002. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> + +#include "ucontext_i.h" + +/* int __getcontext (ucontext_t *ucp) + + Saves the machine context in UCP such that when it is activated, + it appears as if __getcontext() returned again. + + This implementation is intended to be used for *synchronous* context + switches only. Therefore, it does not have to save anything + other than the PRESERVED state. */ + + +ENTRY(__getcontext) + /* Save the preserved registers, the registers used for passing + args, and the return address. */ + movq %rbx, oRBX(%rdi) + movq %rbp, oRBP(%rdi) + movq %r12, oR12(%rdi) + movq %r13, oR13(%rdi) + movq %r14, oR14(%rdi) + movq %r15, oR15(%rdi) + + movq %rdi, oRDI(%rdi) + movq %rsi, oRSI(%rdi) + movq %rdx, oRDX(%rdi) + movq %rcx, oRCX(%rdi) + movq %r8, oR8(%rdi) + movq %r9, oR9(%rdi) + + movq (%rsp), %rcx + movq %rcx, oRIP(%rdi) + leaq 8(%rsp), %rcx /* Exclude the return address. */ + movq %rcx, oRSP(%rdi) + + /* We have separate floating-point register content memory on the + stack. We use the __fpregs_mem block in the context. Set the + links up correctly. */ + + leaq oFPREGSMEM(%rdi), %rcx + movq %rcx, oFPREGS(%rdi) + /* Save the floating-point environment. */ + fnstenv (%rcx) + fldenv (%rcx) + stmxcsr oMXCSR(%rdi) + + /* Save the current signal mask with + rt_sigprocmask (SIG_BLOCK, NULL, set,_NSIG/8). */ + leaq oSIGMASK(%rdi), %rdx + xorl %esi,%esi +#if SIG_BLOCK == 0 + xorl %edi, %edi +#else + movl $SIG_BLOCK, %edi +#endif + movl $_NSIG8,%r10d + movl $__NR_rt_sigprocmask, %eax + syscall + cmpq $-4095, %rax /* Check %rax for error. */ + jae SYSCALL_ERROR_LABEL /* Jump to error handler if error. */ + + /* All done, return 0 for success. */ + xorl %eax, %eax +L(pseudo_end): + ret +PSEUDO_END(__getcontext) + +weak_alias (__getcontext, getcontext) diff -auNr uClibc-0.9.33.2.orig/libc/sysdeps/linux/x86_64/makecontext.c uClibc-0.9.33.2/libc/sysdeps/linux/x86_64/makecontext.c --- uClibc-0.9.33.2.orig/libc/sysdeps/linux/x86_64/makecontext.c 1970-01-01 08:00:00.000000000 +0800 +++ uClibc-0.9.33.2/libc/sysdeps/linux/x86_64/makecontext.c 2017-07-12 10:20:41.662464805 +0800 @@ -0,0 +1,121 @@ +/* Create new context. + Copyright (C) 2002, 2004, 2005, 2008 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Andreas Jaeger <aj@suse.de>, 2002. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> +#include <stdarg.h> +#include <stdint.h> +#include <ucontext.h> + +#include "ucontext_i.h" + +/* This implementation can handle any ARGC value but only + normal integer parameters. + makecontext sets up a stack and the registers for the + user context. The stack looks like this: + +-----------------------+ + | next context | + +-----------------------+ + | parameter 7-n | + +-----------------------+ + | trampoline address | + %rsp -> +-----------------------+ + + The registers are set up like this: + %rdi,%rsi,%rdx,%rcx,%r8,%r9: parameter 1 to 6 + %rbx : address of next context + %rsp : stack pointer. +*/ + +/* XXX: This implementation currently only handles integer arguments. + To handle long int and pointer arguments the va_arg arguments needs + to be changed to long and also the stdlib/tst-setcontext.c file needs + to be changed to pass long arguments to makecontext. */ + + +void +__makecontext (ucontext_t *ucp, void (*func) (void), int argc, ...) +{ + extern void __start_context (void); + greg_t *sp; + unsigned int idx_uc_link; + va_list ap; + int i; + + /* Generate room on stack for parameter if needed and uc_link. */ + sp = (greg_t *) ((uintptr_t) ucp->uc_stack.ss_sp + + ucp->uc_stack.ss_size); + sp -= (argc > 6 ? argc - 6 : 0) + 1; + /* Align stack and make space for trampoline address. */ + sp = (greg_t *) ((((uintptr_t) sp) & -16L) - 8); + + idx_uc_link = (argc > 6 ? argc - 6 : 0) + 1; + + /* Setup context ucp. */ + /* Address to jump to. */ + ucp->uc_mcontext.gregs[REG_RIP] = (uintptr_t) func; + /* Setup rbx.*/ + ucp->uc_mcontext.gregs[REG_RBX] = (uintptr_t) &sp[idx_uc_link]; + ucp->uc_mcontext.gregs[REG_RSP] = (uintptr_t) sp; + + /* Setup stack. */ + sp[0] = (uintptr_t) &__start_context; + sp[idx_uc_link] = (uintptr_t) ucp->uc_link; + + va_start (ap, argc); + /* Handle arguments. + + The standard says the parameters must all be int values. This is + an historic accident and would be done differently today. For + x86-64 all integer values are passed as 64-bit values and + therefore extending the API to copy 64-bit values instead of + 32-bit ints makes sense. It does not break existing + functionality and it does not violate the standard which says + that passing non-int values means undefined behavior. */ + for (i = 0; i < argc; ++i) + switch (i) + { + case 0: + ucp->uc_mcontext.gregs[REG_RDI] = va_arg (ap, greg_t); + break; + case 1: + ucp->uc_mcontext.gregs[REG_RSI] = va_arg (ap, greg_t); + break; + case 2: + ucp->uc_mcontext.gregs[REG_RDX] = va_arg (ap, greg_t); + break; + case 3: + ucp->uc_mcontext.gregs[REG_RCX] = va_arg (ap, greg_t); + break; + case 4: + ucp->uc_mcontext.gregs[REG_R8] = va_arg (ap, greg_t); + break; + case 5: + ucp->uc_mcontext.gregs[REG_R9] = va_arg (ap, greg_t); + break; + default: + /* Put value on stack. */ + sp[i - 5] = va_arg (ap, greg_t); + break; + } + va_end (ap); + +} + + +weak_alias (__makecontext, makecontext) diff -auNr uClibc-0.9.33.2.orig/libc/sysdeps/linux/x86_64/Makefile.arch uClibc-0.9.33.2/libc/sysdeps/linux/x86_64/Makefile.arch --- uClibc-0.9.33.2.orig/libc/sysdeps/linux/x86_64/Makefile.arch 2012-05-15 15:20:09.000000000 +0800 +++ uClibc-0.9.33.2/libc/sysdeps/linux/x86_64/Makefile.arch 2017-07-12 10:57:32.977050182 +0800 @@ -14,6 +14,11 @@ SSRC += vfork.S clone.S endif +ifeq ($(UCLIBC_HAS_CONTEXT_FUNCS),y) +CSRC += makecontext.c +SSRC += getcontext.S setcontext.S swapcontext.S +endif + ifeq ($(UCLIBC_LINUX_SPECIFIC),y) ARCH_OBJ_FILTEROUT = sched_getcpu.c ifeq ($(UCLIBC_HAS_TLS),y) diff -auNr uClibc-0.9.33.2.orig/libc/sysdeps/linux/x86_64/setcontext.S uClibc-0.9.33.2/libc/sysdeps/linux/x86_64/setcontext.S --- uClibc-0.9.33.2.orig/libc/sysdeps/linux/x86_64/setcontext.S 1970-01-01 08:00:00.000000000 +0800 +++ uClibc-0.9.33.2/libc/sysdeps/linux/x86_64/setcontext.S 2017-07-12 10:20:46.996828676 +0800 @@ -0,0 +1,103 @@ +/* Install given context. + Copyright (C) 2002-2012 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Andreas Jaeger <aj@suse.de>, 2002. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> + +#include "ucontext_i.h" + + +/* int __setcontext (const ucontext_t *ucp) + + Restores the machine context in UCP and thereby resumes execution + in that context. + + This implementation is intended to be used for *synchronous* context + switches only. Therefore, it does not have to restore anything + other than the PRESERVED state. */ + +ENTRY(__setcontext) + /* Save argument since syscall will destroy it. */ + pushq %rdi + cfi_adjust_cfa_offset(8) + + /* Set the signal mask with + rt_sigprocmask (SIG_SETMASK, mask, NULL, _NSIG/8). */ + leaq oSIGMASK(%rdi), %rsi + xorl %edx, %edx + movl $SIG_SETMASK, %edi + movl $_NSIG8,%r10d + movl $__NR_rt_sigprocmask, %eax + syscall + popq %rdi /* Reload %rdi, adjust stack. */ + cfi_adjust_cfa_offset(-8) + cmpq $-4095, %rax /* Check %rax for error. */ + jae SYSCALL_ERROR_LABEL /* Jump to error handler if error. */ + + /* Restore the floating-point context. Not the registers, only the + rest. */ + movq oFPREGS(%rdi), %rcx + fldenv (%rcx) + ldmxcsr oMXCSR(%rdi) + + + /* Load the new stack pointer, the preserved registers and + registers used for passing args. */ + cfi_def_cfa(%rdi, 0) + cfi_offset(%rbx,oRBX) + cfi_offset(%rbp,oRBP) + cfi_offset(%r12,oR12) + cfi_offset(%r13,oR13) + cfi_offset(%r14,oR14) + cfi_offset(%r15,oR15) + cfi_offset(%rsp,oRSP) + cfi_offset(%rip,oRIP) + + movq oRSP(%rdi), %rsp + movq oRBX(%rdi), %rbx + movq oRBP(%rdi), %rbp + movq oR12(%rdi), %r12 + movq oR13(%rdi), %r13 + movq oR14(%rdi), %r14 + movq oR15(%rdi), %r15 + + /* The following ret should return to the address set with + getcontext. Therefore push the address on the stack. */ + movq oRIP(%rdi), %rcx + pushq %rcx + + movq oRSI(%rdi), %rsi + movq oRDX(%rdi), %rdx + movq oRCX(%rdi), %rcx + movq oR8(%rdi), %r8 + movq oR9(%rdi), %r9 + + /* Setup finally %rdi. */ + movq oRDI(%rdi), %rdi + + /* End FDE here, we fall into another context. */ + cfi_endproc + cfi_startproc + + /* Clear rax to indicate success. */ + xorl %eax, %eax +L(pseudo_end): + ret +PSEUDO_END(__setcontext) + +weak_alias (__setcontext, setcontext) diff -auNr uClibc-0.9.33.2.orig/libc/sysdeps/linux/x86_64/__start_context.S uClibc-0.9.33.2/libc/sysdeps/linux/x86_64/__start_context.S --- uClibc-0.9.33.2.orig/libc/sysdeps/linux/x86_64/__start_context.S 1970-01-01 08:00:00.000000000 +0800 +++ uClibc-0.9.33.2/libc/sysdeps/linux/x86_64/__start_context.S 2017-07-12 10:21:17.456848543 +0800 @@ -0,0 +1,49 @@ +/* Copyright (C) 2002-2012 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Andreas Jaeger <aj@suse.de>, 2002. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> + +/* This is the helper code which gets called if a function which is + registered with 'makecontext' returns. In this case we have to + install the context listed in the uc_link element of the context + 'makecontext' manipulated at the time of the 'makecontext' call. + If the pointer is NULL the process must terminate. */ + + +ENTRY(__start_context) + /* This removes the parameters passed to the function given to + 'makecontext' from the stack. RBX contains the address + on the stack pointer for the next context. */ + movq %rbx, %rsp + + popq %rdi /* This is the next context. */ + cfi_adjust_cfa_offset(-8) + testq %rdi, %rdi + je 2f /* If it is zero exit. */ + + call JUMPTARGET(__setcontext) + /* If this returns (which can happen if the syscall fails) we'll + exit the program with the return error value (-1). */ + movq %rax,%rdi + +2: + call HIDDEN_JUMPTARGET(exit) + /* The 'exit' call should never return. In case it does cause + the process to terminate. */ + hlt +END(__start_context) diff -auNr uClibc-0.9.33.2.orig/libc/sysdeps/linux/x86_64/swapcontext.S uClibc-0.9.33.2/libc/sysdeps/linux/x86_64/swapcontext.S --- uClibc-0.9.33.2.orig/libc/sysdeps/linux/x86_64/swapcontext.S 1970-01-01 08:00:00.000000000 +0800 +++ uClibc-0.9.33.2/libc/sysdeps/linux/x86_64/swapcontext.S 2017-07-12 10:20:50.874269483 +0800 @@ -0,0 +1,121 @@ +/* Save current context and install the given one. + Copyright (C) 2002-2012 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Andreas Jaeger <aj@suse.de>, 2002. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> + +#include "ucontext_i.h" + + +/* int __swapcontext (ucontext_t *oucp, const ucontext_t *ucp); + + Saves the machine context in oucp such that when it is activated, + it appears as if __swapcontextt() returned again, restores the + machine context in ucp and thereby resumes execution in that + context. + + This implementation is intended to be used for *synchronous* context + switches only. Therefore, it does not have to save anything + other than the PRESERVED state. */ + +ENTRY(__swapcontext) + /* Save the preserved registers, the registers used for passing args, + and the return address. */ + movq %rbx, oRBX(%rdi) + movq %rbp, oRBP(%rdi) + movq %r12, oR12(%rdi) + movq %r13, oR13(%rdi) + movq %r14, oR14(%rdi) + movq %r15, oR15(%rdi) + + movq %rdi, oRDI(%rdi) + movq %rsi, oRSI(%rdi) + movq %rdx, oRDX(%rdi) + movq %rcx, oRCX(%rdi) + movq %r8, oR8(%rdi) + movq %r9, oR9(%rdi) + + movq (%rsp), %rcx + movq %rcx, oRIP(%rdi) + leaq 8(%rsp), %rcx /* Exclude the return address. */ + movq %rcx, oRSP(%rdi) + + /* We have separate floating-point register content memory on the + stack. We use the __fpregs_mem block in the context. Set the + links up correctly. */ + leaq oFPREGSMEM(%rdi), %rcx + movq %rcx, oFPREGS(%rdi) + /* Save the floating-point environment. */ + fnstenv (%rcx) + stmxcsr oMXCSR(%rdi) + + + /* The syscall destroys some registers, save them. */ + movq %rsi, %r12 + + /* Save the current signal mask and install the new one with + rt_sigprocmask (SIG_BLOCK, newset, oldset,_NSIG/8). */ + leaq oSIGMASK(%rdi), %rdx + leaq oSIGMASK(%rsi), %rsi + movl $SIG_SETMASK, %edi + movl $_NSIG8,%r10d + movl $__NR_rt_sigprocmask, %eax + syscall + cmpq $-4095, %rax /* Check %rax for error. */ + jae SYSCALL_ERROR_LABEL /* Jump to error handler if error. */ + + /* Restore destroyed registers. */ + movq %r12, %rsi + + /* Restore the floating-point context. Not the registers, only the + rest. */ + movq oFPREGS(%rsi), %rcx + fldenv (%rcx) + ldmxcsr oMXCSR(%rsi) + + /* Load the new stack pointer and the preserved registers. */ + movq oRSP(%rsi), %rsp + movq oRBX(%rsi), %rbx + movq oRBP(%rsi), %rbp + movq oR12(%rsi), %r12 + movq oR13(%rsi), %r13 + movq oR14(%rsi), %r14 + movq oR15(%rsi), %r15 + + /* The following ret should return to the address set with + getcontext. Therefore push the address on the stack. */ + movq oRIP(%rsi), %rcx + pushq %rcx + + /* Setup registers used for passing args. */ + movq oRDI(%rsi), %rdi + movq oRDX(%rsi), %rdx + movq oRCX(%rsi), %rcx + movq oR8(%rsi), %r8 + movq oR9(%rsi), %r9 + + /* Setup finally %rsi. */ + movq oRSI(%rsi), %rsi + + /* Clear rax to indicate success. */ + xorl %eax, %eax +L(pseudo_end): + ret +PSEUDO_END(__swapcontext) + +weak_alias (__swapcontext, swapcontext) diff -auNr uClibc-0.9.33.2.orig/libc/sysdeps/linux/x86_64/ucontext_i.sym uClibc-0.9.33.2/libc/sysdeps/linux/x86_64/ucontext_i.sym --- uClibc-0.9.33.2.orig/libc/sysdeps/linux/x86_64/ucontext_i.sym 1970-01-01 08:00:00.000000000 +0800 +++ uClibc-0.9.33.2/libc/sysdeps/linux/x86_64/ucontext_i.sym 2017-07-12 10:20:54.252365702 +0800 @@ -0,0 +1,37 @@ +#include <stddef.h> +#include <signal.h> +#include <sys/ucontext.h> + +-- + +SIG_BLOCK +SIG_SETMASK + +_NSIG8 (_NSIG / 8) + +#define ucontext(member) offsetof (ucontext_t, member) +#define mcontext(member) ucontext (uc_mcontext.member) +#define mreg(reg) mcontext (gregs[REG_##reg]) + +oRBP mreg (RBP) +oRSP mreg (RSP) +oRBX mreg (RBX) +oR8 mreg (R8) +oR9 mreg (R9) +oR10 mreg (R10) +oR11 mreg (R11) +oR12 mreg (R12) +oR13 mreg (R13) +oR14 mreg (R14) +oR15 mreg (R15) +oRDI mreg (RDI) +oRSI mreg (RSI) +oRDX mreg (RDX) +oRAX mreg (RAX) +oRCX mreg (RCX) +oRIP mreg (RIP) +oEFL mreg (EFL) +oFPREGS mcontext (fpregs) +oSIGMASK ucontext (uc_sigmask) +oFPREGSMEM ucontext (__fpregs_mem) +oMXCSR ucontext (__fpregs_mem.mxcsr) diff -auNr uClibc-0.9.33.2.orig/Rules.mak uClibc-0.9.33.2/Rules.mak --- uClibc-0.9.33.2.orig/Rules.mak 2012-05-15 15:20:09.000000000 +0800 +++ uClibc-0.9.33.2/Rules.mak 2017-07-12 14:38:34.340616675 +0800 @@ -795,3 +795,4 @@ endif LOCAL_INSTALL_PATH := install_dir +PTHREAD_GENERATE_MANGLE ?= -n "s/^.*@@@name@@@\([^@]*\)@@@value@@@[^0-9Xxa-fA-F-]*\([0-9Xxa-fA-F-][0-9Xxa-fA-F-]*\).*@@@end@@@.*\$$/\#define \1 \2/p" |
将uClibc clean掉，并重新make，开启：
|
1 2 3 |
ARCH_HAS_UCONTEXT=y UCLIBC_SUSV3_LEGACY=y UCLIBC_HAS_CONTEXT_FUNCS=y |
这样uClibc就可以支持ucontext的相关函数了。
参考资料：
Ralink SDK 64-bit cross-compiler on Ubuntu 15.04
How do I compile gnu libstdc++.a with PIC?
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本文链接地址: 在CentOS7上编译Ralink SDK 64-bit工具链
