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-rw-r--r--main/libc0.9.32/0002-libc-sysdeps-add-get-make-set-swap-context-for-x86_6.patch633
1 files changed, 0 insertions, 633 deletions
diff --git a/main/libc0.9.32/0002-libc-sysdeps-add-get-make-set-swap-context-for-x86_6.patch b/main/libc0.9.32/0002-libc-sysdeps-add-get-make-set-swap-context-for-x86_6.patch
deleted file mode 100644
index ded1b2e893..0000000000
--- a/main/libc0.9.32/0002-libc-sysdeps-add-get-make-set-swap-context-for-x86_6.patch
+++ /dev/null
@@ -1,633 +0,0 @@
-From f231ba278e7820f5b73cde16f17f227118d9bafc Mon Sep 17 00:00:00 2001
-From: Natanael Copa <ncopa@alpinelinux.org>
-Date: Mon, 29 Oct 2012 14:33:26 +0000
-Subject: [PATCH 2/2] libc/sysdeps: add {get,make,set,swap}context for x86_64
-
----
- libc/sysdeps/linux/x86_64/Makefile.arch | 39 +++++++++
- libc/sysdeps/linux/x86_64/__start_context.S | 49 +++++++++++
- libc/sysdeps/linux/x86_64/getcontext.S | 88 ++++++++++++++++++++
- libc/sysdeps/linux/x86_64/makecontext.c | 121 ++++++++++++++++++++++++++++
- libc/sysdeps/linux/x86_64/setcontext.S | 103 +++++++++++++++++++++++
- libc/sysdeps/linux/x86_64/swapcontext.S | 121 ++++++++++++++++++++++++++++
- libc/sysdeps/linux/x86_64/ucontext_i.sym | 37 +++++++++
- 7 files changed, 558 insertions(+)
- create mode 100644 libc/sysdeps/linux/x86_64/__start_context.S
- create mode 100644 libc/sysdeps/linux/x86_64/getcontext.S
- create mode 100644 libc/sysdeps/linux/x86_64/makecontext.c
- create mode 100644 libc/sysdeps/linux/x86_64/setcontext.S
- create mode 100644 libc/sysdeps/linux/x86_64/swapcontext.S
- create mode 100644 libc/sysdeps/linux/x86_64/ucontext_i.sym
-
-diff --git a/libc/sysdeps/linux/x86_64/Makefile.arch b/libc/sysdeps/linux/x86_64/Makefile.arch
-index 3243d86..bcf8096 100644
---- a/libc/sysdeps/linux/x86_64/Makefile.arch
-+++ b/libc/sysdeps/linux/x86_64/Makefile.arch
-@@ -10,6 +10,9 @@ CSRC := brk.c __syscall_error.c sigaction.c mmap.c
- SSRC := \
- __longjmp.S setjmp.S syscall.S bsd-setjmp.S bsd-_setjmp.S
-
-+LIBC_ARCH_DIR := $(top_srcdir)/libc/sysdeps/linux/$(TARGET_ARCH)
-+LIBC_ARCH_OUT := $(top_builddir)/libc/sysdeps/linux/$(TARGET_ARCH)
-+
- ifneq ($(UCLIBC_HAS_THREADS_NATIVE),y)
- SSRC += vfork.S clone.S
- endif
-@@ -20,3 +23,39 @@ ifeq ($(UCLIBC_HAS_TLS),y)
- SSRC += sched_getcpu.S
- endif
- endif
-+
-+ifeq ($(UCLIBC_SUSV4_LEGACY),y)
-+CSRC += makecontext.c
-+
-+SSRC += setcontext.S getcontext.S swapcontext.S __start_context.S
-+
-+ASFLAGS-setcontext.S := -D_LIBC_REENTRANT
-+ASFLAGS-getcontext.S := -D_LIBC_REENTRANT
-+ASFLAGS-swapcontext.S := -D_LIBC_REENTRANT
-+
-+ifeq ($(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/x86_64/__start_context.S b/libc/sysdeps/linux/x86_64/__start_context.S
-new file mode 100644
-index 0000000..9f2ee23
---- /dev/null
-+++ b/libc/sysdeps/linux/x86_64/__start_context.S
-@@ -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 --git a/libc/sysdeps/linux/x86_64/getcontext.S b/libc/sysdeps/linux/x86_64/getcontext.S
-new file mode 100644
-index 0000000..dcebc4f
---- /dev/null
-+++ b/libc/sysdeps/linux/x86_64/getcontext.S
-@@ -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 --git a/libc/sysdeps/linux/x86_64/makecontext.c b/libc/sysdeps/linux/x86_64/makecontext.c
-new file mode 100644
-index 0000000..5473031
---- /dev/null
-+++ b/libc/sysdeps/linux/x86_64/makecontext.c
-@@ -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 --git a/libc/sysdeps/linux/x86_64/setcontext.S b/libc/sysdeps/linux/x86_64/setcontext.S
-new file mode 100644
-index 0000000..561ab9f
---- /dev/null
-+++ b/libc/sysdeps/linux/x86_64/setcontext.S
-@@ -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 --git a/libc/sysdeps/linux/x86_64/swapcontext.S b/libc/sysdeps/linux/x86_64/swapcontext.S
-new file mode 100644
-index 0000000..6d2ebb8
---- /dev/null
-+++ b/libc/sysdeps/linux/x86_64/swapcontext.S
-@@ -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 --git a/libc/sysdeps/linux/x86_64/ucontext_i.sym b/libc/sysdeps/linux/x86_64/ucontext_i.sym
-new file mode 100644
-index 0000000..af3e0e5
---- /dev/null
-+++ b/libc/sysdeps/linux/x86_64/ucontext_i.sym
-@@ -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)
---
-1.8.0
-
generated by cgit v1.2.3 (git 2.25.1) at 2024-09-30 21:30:48 +0000