diff options
Diffstat (limited to 'main/libc0.9.32/0001-libc-sysdeps-get-make-set-swap-context-for-i386.patch')
| -rw-r--r-- | main/libc0.9.32/0001-libc-sysdeps-get-make-set-swap-context-for-i386.patch | 562 |
1 files changed, 0 insertions, 562 deletions
diff --git a/main/libc0.9.32/0001-libc-sysdeps-get-make-set-swap-context-for-i386.patch b/main/libc0.9.32/0001-libc-sysdeps-get-make-set-swap-context-for-i386.patch deleted file mode 100644 index 54038d59f4..0000000000 --- a/main/libc0.9.32/0001-libc-sysdeps-get-make-set-swap-context-for-i386.patch +++ /dev/null @@ -1,562 +0,0 @@ -From cb079bffc0b93c75f2118f101add4d7d2259440b Mon Sep 17 00:00:00 2001 -From: Natanael Copa <ncopa@alpinelinux.org> -Date: Mon, 29 Oct 2012 13:24:05 +0000 -Subject: [PATCH] libc/sysdeps: {get,make,set,swap}context for i386 - -imported from glibc - -Signed-off-by: Natanael Copa <ncopa@alpinelinux.org> - -Conflicts: - libc/sysdeps/linux/i386/Makefile.arch ---- - .gitignore | 1 + - libc/sysdeps/linux/i386/Makefile.arch | 36 ++++++++++ - libc/sysdeps/linux/i386/getcontext.S | 84 ++++++++++++++++++++++ - libc/sysdeps/linux/i386/makecontext.S | 123 +++++++++++++++++++++++++++++++++ - libc/sysdeps/linux/i386/setcontext.S | 96 +++++++++++++++++++++++++ - libc/sysdeps/linux/i386/swapcontext.S | 110 +++++++++++++++++++++++++++++ - libc/sysdeps/linux/i386/ucontext_i.sym | 30 ++++++++ - 7 files changed, 480 insertions(+) - create mode 100644 libc/sysdeps/linux/i386/getcontext.S - create mode 100644 libc/sysdeps/linux/i386/makecontext.S - create mode 100644 libc/sysdeps/linux/i386/setcontext.S - create mode 100644 libc/sysdeps/linux/i386/swapcontext.S - create mode 100644 libc/sysdeps/linux/i386/ucontext_i.sym - -diff --git a/.gitignore b/.gitignore -index c2603a0..a980db6 100644 ---- a/.gitignore -+++ b/.gitignore -@@ -18,6 +18,7 @@ install_dir/ - .*.dep - /*.log - cscope.* -+ucontext_i.[chs] - - # - # Debugging files -diff --git a/libc/sysdeps/linux/i386/Makefile.arch b/libc/sysdeps/linux/i386/Makefile.arch -index 966f8b5..64f8110 100644 ---- a/libc/sysdeps/linux/i386/Makefile.arch -+++ b/libc/sysdeps/linux/i386/Makefile.arch -@@ -11,7 +11,43 @@ SSRC := \ - __longjmp.S setjmp.S bsd-setjmp.S bsd-_setjmp.S \ - sync_file_range.S syscall.S mmap.S mmap64.S posix_fadvise64.S - -+LIBC_ARCH_DIR := $(top_srcdir)/libc/sysdeps/linux/$(TARGET_ARCH) -+LIBC_ARCH_OUT := $(top_builddir)/libc/sysdeps/linux/$(TARGET_ARCH) - - ifneq ($(UCLIBC_HAS_THREADS_NATIVE),y) - SSRC += vfork.S clone.S - endif -+ -+ifeq ($(UCLIBC_SUSV4_LEGACY),y) -+SSRC += makecontext.S setcontext.S getcontext.S swapcontext.S -+ -+ASFLAGS-setcontext.S := -D_LIBC_REENTRANT -+ASFLAGS-getcontext.S := -D_LIBC_REENTRANT -+ASFLAGS-swapcontext.S := -D_LIBC_REENTRANT -+ -+ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y) -+#Needed to use the correct SYSCALL_ERROR_HANDLER -+ASFLAGS-setcontext.S += -DUSE___THREAD -+ASFLAGS-getcontext.S += -DUSE___THREAD -+ASFLAGS-swapcontext.S += -DUSE___THREAD -+endif -+ -+pregen-headers-$(UCLIBC_SUSV4_LEGACY) += $(LIBC_ARCH_OUT)/ucontext_i.h -+ -+headers_clean-y += libc_arch_headers_clean -+ -+CFLAGS-ucontext_i.c = -S -+ -+$(LIBC_ARCH_OUT)/ucontext_i.c: $(LIBC_ARCH_DIR)/ucontext_i.sym -+ $(do_awk) $(top_srcdir)extra/scripts/gen-as-const.awk $< > $@ -+ -+$(LIBC_ARCH_OUT)/ucontext_i.s: $(LIBC_ARCH_OUT)/ucontext_i.c -+ $(compile.c) -+ -+$(LIBC_ARCH_OUT)/ucontext_i.h: $(LIBC_ARCH_OUT)/ucontext_i.s -+ $(do_sed) -n "s/^.*@@@name@@@\([^@]*\)@@@value@@@[^0-9Xxa-fA-F-]*\([0-9Xxa-fA-F-][0-9Xxa-fA-F-]*\).*@@@end@@@.*$\/#define \1 \2/p" $< > $@ -+ -+libc_arch_headers_clean: -+ $(do_rm) $(addprefix $(LIBC_ARCH_OUT)/ucontext_i., c h s) -+endif -+ -diff --git a/libc/sysdeps/linux/i386/getcontext.S b/libc/sysdeps/linux/i386/getcontext.S -new file mode 100644 -index 0000000..3221b59 ---- /dev/null -+++ b/libc/sysdeps/linux/i386/getcontext.S -@@ -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 --git a/libc/sysdeps/linux/i386/makecontext.S b/libc/sysdeps/linux/i386/makecontext.S -new file mode 100644 -index 0000000..d12799d ---- /dev/null -+++ b/libc/sysdeps/linux/i386/makecontext.S -@@ -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 --git a/libc/sysdeps/linux/i386/setcontext.S b/libc/sysdeps/linux/i386/setcontext.S -new file mode 100644 -index 0000000..ae953cc ---- /dev/null -+++ b/libc/sysdeps/linux/i386/setcontext.S -@@ -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 --git a/libc/sysdeps/linux/i386/swapcontext.S b/libc/sysdeps/linux/i386/swapcontext.S -new file mode 100644 -index 0000000..ee5d0e4 ---- /dev/null -+++ b/libc/sysdeps/linux/i386/swapcontext.S -@@ -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 --git a/libc/sysdeps/linux/i386/ucontext_i.sym b/libc/sysdeps/linux/i386/ucontext_i.sym -new file mode 100644 -index 0000000..b11a550 ---- /dev/null -+++ b/libc/sysdeps/linux/i386/ucontext_i.sym -@@ -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) --- -1.8.0 - |