Sources for 32-bit solaris were added4.0.94.0.74.0.64.0.10

4 files changed, 412 insertions, 9 deletions

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 19b108bd..eaedc2a8 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -64,7 +64,6 @@ set(libunwind_sources_x8664_32
     elf32.c
     x86/is_fpreg.c
     x86/regname.c
-    x86/setcontext.c
     x86/Lcreate_addr_space.c
     x86/Lget_save_loc.c
     x86/Lglobal.c
@@ -74,23 +73,40 @@ set(libunwind_sources_x8664_32
     x86/Lget_proc_info.c
     x86/Lregs.c
     x86/Lresume.c
-    x86/getcontext.c
     x86/Lstep.c
-    x86/Los-linux.c
+    ${CMAKE_CURRENT_BINARY_DIR}/getcontext-32.o
    )
 
+if("${CMAKE_SYSTEM_NAME}" MATCHES "Linux")
+    list(APPEND libunwind_sources_x8664_32 x86/Los-linux.c)
+    set(x8664_32_getcontext ${CMAKE_CURRENT_SOURCE_DIR}/x86/getcontext-linux.S)
+elseif("${CMAKE_SYSTEM_NAME}" MATCHES "SunOS")
+    list(APPEND libunwind_sources_x8664_32 x86/Los-solaris.c)
+    set(x8664_32_getcontext ${CMAKE_CURRENT_SOURCE_DIR}/x86/getcontext-solaris.S)
+endif()
+
+
 string(REPLACE " " ";" c_flags "${CMAKE_C_FLAGS}")
 
-add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/getcontext.o
+
+add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/getcontext-32.o
+                   COMMAND ${CMAKE_C_COMPILER} ${c_flags}
+                           -c ${x8664_32_getcontext}
+                           -o ${CMAKE_CURRENT_BINARY_DIR}/getcontext-32.o
+                   DEPENDS ${x8664_32_getcontext})
+
+
+add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/getcontext-64.o
                    COMMAND ${CMAKE_C_COMPILER} ${c_flags}
                            -c ${CMAKE_CURRENT_SOURCE_DIR}/x86_64/getcontext.S
-                           -o ${CMAKE_CURRENT_BINARY_DIR}/getcontext.o
+                           -o ${CMAKE_CURRENT_BINARY_DIR}/getcontext-64.o
                    DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/x86_64/getcontext.S)
 
-add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/setcontext.o
+
+add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/setcontext-64.o
                    COMMAND ${CMAKE_C_COMPILER} ${c_flags}
                            -c ${CMAKE_CURRENT_SOURCE_DIR}/x86_64/setcontext.S
-                           -o ${CMAKE_CURRENT_BINARY_DIR}/setcontext.o
+                           -o ${CMAKE_CURRENT_BINARY_DIR}/setcontext-64.o
                    DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/x86_64/setcontext.S)
 
 
@@ -108,8 +124,8 @@ set(libunwind_sources_x8664_64
     x86_64/Lregs.c
     x86_64/Lresume.c
     x86_64/Lstep.c
-    ${CMAKE_CURRENT_BINARY_DIR}/getcontext.o
-    ${CMAKE_CURRENT_BINARY_DIR}/setcontext.o
+    ${CMAKE_CURRENT_BINARY_DIR}/getcontext-64.o
+    ${CMAKE_CURRENT_BINARY_DIR}/setcontext-64.o
    )
 
 
@@ -136,6 +152,7 @@ include_directories(.
 # TODO: add checks for all platforms
 if("${CMAKE_C_FLAGS}" MATCHES "-m32")
     set(target "x8664_32")
+    include_directories(../include/tdep-x86)
 elseif("${CMAKE_C_FLAGS}" MATCHES "-m64")
     set(target "x8664_64")
     include_directories(../include/tdep-x86_64)
diff --git a/src/x86/Gos-solaris.c b/src/x86/Gos-solaris.c
new file mode 100644
index 00000000..31f83bae
--- /dev/null
+++ b/src/x86/Gos-solaris.c
@@ -0,0 +1,307 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2002-2004 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind_i.h"
+#include "offsets.h"
+
+PROTECTED int
+unw_is_signal_frame (unw_cursor_t *cursor)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  unw_word_t w0, w1, ip;
+  unw_addr_space_t as;
+  unw_accessors_t *a;
+  void *arg;
+  int ret;
+
+  as = c->dwarf.as;
+  a = unw_get_accessors (as);
+  arg = c->dwarf.as_arg;
+
+  /* Check if EIP points at sigreturn() sequence.  On Linux, this is:
+
+    __restore:
+	0x58				pop %eax
+	0xb8 0x77 0x00 0x00 0x00	movl 0x77,%eax
+	0xcd 0x80			int 0x80
+
+     without SA_SIGINFO, and
+
+    __restore_rt:
+       0xb8 0xad 0x00 0x00 0x00        movl 0xad,%eax
+       0xcd 0x80                       int 0x80
+       0x00                            
+
+     if SA_SIGINFO is specified.
+  */
+  ip = c->dwarf.ip;
+  if ((ret = (*a->access_mem) (as, ip, &w0, 0, arg)) < 0
+      || (ret = (*a->access_mem) (as, ip + 4, &w1, 0, arg)) < 0)
+    return ret;
+  ret = ((w0 == 0x0077b858 && w1 == 0x80cd0000)
+	 || (w0 == 0x0000adb8 && (w1 & 0xffffff) == 0x80cd00));
+  Debug (16, "returning %d\n", ret);
+  return ret;
+}
+
+PROTECTED int
+unw_handle_signal_frame (unw_cursor_t *cursor)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  int ret;
+
+  /* c->esp points at the arguments to the handler.  Without
+     SA_SIGINFO, the arguments consist of a signal number
+     followed by a struct sigcontext.  With SA_SIGINFO, the
+     arguments consist a signal number, a siginfo *, and a
+     ucontext *. */
+  unw_word_t sc_addr;
+  unw_word_t siginfo_ptr_addr = c->dwarf.cfa + 4;
+  unw_word_t sigcontext_ptr_addr = c->dwarf.cfa + 8;
+  unw_word_t siginfo_ptr, sigcontext_ptr;
+  struct dwarf_loc esp_loc, siginfo_ptr_loc, sigcontext_ptr_loc;
+
+  siginfo_ptr_loc = DWARF_LOC (siginfo_ptr_addr, 0);
+  sigcontext_ptr_loc = DWARF_LOC (sigcontext_ptr_addr, 0);
+  ret = (dwarf_get (&c->dwarf, siginfo_ptr_loc, &siginfo_ptr)
+	 | dwarf_get (&c->dwarf, sigcontext_ptr_loc, &sigcontext_ptr));
+  if (ret < 0)
+    {
+      Debug (2, "returning 0\n");
+      return 0;
+    }
+  if (siginfo_ptr < c->dwarf.cfa
+      || siginfo_ptr > c->dwarf.cfa + 256
+      || sigcontext_ptr < c->dwarf.cfa
+      || sigcontext_ptr > c->dwarf.cfa + 256)
+    {
+      /* Not plausible for SA_SIGINFO signal */
+      c->sigcontext_format = X86_SCF_LINUX_SIGFRAME;
+      c->sigcontext_addr = sc_addr = c->dwarf.cfa + 4;
+    }
+  else
+    {
+      /* If SA_SIGINFO were not specified, we actually read
+	 various segment pointers instead.  We believe that at
+	 least fs and _fsh are always zero for linux, so it is
+	 not just unlikely, but impossible that we would end
+	 up here. */
+      c->sigcontext_format = X86_SCF_LINUX_RT_SIGFRAME;
+      c->sigcontext_addr = sigcontext_ptr;
+      sc_addr = sigcontext_ptr + LINUX_UC_MCONTEXT_OFF;
+    }
+  esp_loc = DWARF_LOC (sc_addr + LINUX_SC_ESP_OFF, 0);
+  ret = dwarf_get (&c->dwarf, esp_loc, &c->dwarf.cfa);
+  if (ret < 0)
+    {
+      Debug (2, "returning 0\n");
+      return 0;
+    }
+
+  c->dwarf.loc[EAX] = DWARF_LOC (sc_addr + LINUX_SC_EAX_OFF, 0);
+  c->dwarf.loc[ECX] = DWARF_LOC (sc_addr + LINUX_SC_ECX_OFF, 0);
+  c->dwarf.loc[EDX] = DWARF_LOC (sc_addr + LINUX_SC_EDX_OFF, 0);
+  c->dwarf.loc[EBX] = DWARF_LOC (sc_addr + LINUX_SC_EBX_OFF, 0);
+  c->dwarf.loc[EBP] = DWARF_LOC (sc_addr + LINUX_SC_EBP_OFF, 0);
+  c->dwarf.loc[ESI] = DWARF_LOC (sc_addr + LINUX_SC_ESI_OFF, 0);
+  c->dwarf.loc[EDI] = DWARF_LOC (sc_addr + LINUX_SC_EDI_OFF, 0);
+  c->dwarf.loc[EFLAGS] = DWARF_NULL_LOC;
+  c->dwarf.loc[TRAPNO] = DWARF_NULL_LOC;
+  c->dwarf.loc[ST0] = DWARF_NULL_LOC;
+  c->dwarf.loc[EIP] = DWARF_LOC (sc_addr + LINUX_SC_EIP_OFF, 0);
+  c->dwarf.loc[ESP] = DWARF_LOC (sc_addr + LINUX_SC_ESP_OFF, 0);
+
+  return 0;
+}
+
+HIDDEN dwarf_loc_t
+x86_get_scratch_loc (struct cursor *c, unw_regnum_t reg)
+{
+  unw_word_t addr = c->sigcontext_addr, fpstate_addr, off;
+  int ret, is_fpstate = 0;
+
+  switch (c->sigcontext_format)
+    {
+    case X86_SCF_NONE:
+      return DWARF_REG_LOC (&c->dwarf, reg);
+
+    case X86_SCF_LINUX_SIGFRAME:
+      break;
+
+    case X86_SCF_LINUX_RT_SIGFRAME:
+      addr += LINUX_UC_MCONTEXT_OFF;
+      break;
+
+    default:
+      return DWARF_NULL_LOC;
+    }
+
+  switch (reg)
+    {
+    case UNW_X86_GS: off = LINUX_SC_GS_OFF; break;
+    case UNW_X86_FS: off = LINUX_SC_FS_OFF; break;
+    case UNW_X86_ES: off = LINUX_SC_ES_OFF; break;
+    case UNW_X86_DS: off = LINUX_SC_DS_OFF; break;
+    case UNW_X86_EDI: off = LINUX_SC_EDI_OFF; break;
+    case UNW_X86_ESI: off = LINUX_SC_ESI_OFF; break;
+    case UNW_X86_EBP: off = LINUX_SC_EBP_OFF; break;
+    case UNW_X86_ESP: off = LINUX_SC_ESP_OFF; break;
+    case UNW_X86_EBX: off = LINUX_SC_EBX_OFF; break;
+    case UNW_X86_EDX: off = LINUX_SC_EDX_OFF; break;
+    case UNW_X86_ECX: off = LINUX_SC_ECX_OFF; break;
+    case UNW_X86_EAX: off = LINUX_SC_EAX_OFF; break;
+    case UNW_X86_TRAPNO: off = LINUX_SC_TRAPNO_OFF; break;
+    case UNW_X86_EIP: off = LINUX_SC_EIP_OFF; break;
+    case UNW_X86_CS: off = LINUX_SC_CS_OFF; break;
+    case UNW_X86_EFLAGS: off = LINUX_SC_EFLAGS_OFF; break;
+    case UNW_X86_SS: off = LINUX_SC_SS_OFF; break;
+
+      /* The following is probably not correct for all possible cases.
+	 Somebody who understands this better should review this for
+	 correctness.  */
+
+    case UNW_X86_FCW: is_fpstate = 1; off = LINUX_FPSTATE_CW_OFF; break;
+    case UNW_X86_FSW: is_fpstate = 1; off = LINUX_FPSTATE_SW_OFF; break;
+    case UNW_X86_FTW: is_fpstate = 1; off = LINUX_FPSTATE_TAG_OFF; break;
+    case UNW_X86_FCS: is_fpstate = 1; off = LINUX_FPSTATE_CSSEL_OFF; break;
+    case UNW_X86_FIP: is_fpstate = 1; off = LINUX_FPSTATE_IPOFF_OFF; break;
+    case UNW_X86_FEA: is_fpstate = 1; off = LINUX_FPSTATE_DATAOFF_OFF; break;
+    case UNW_X86_FDS: is_fpstate = 1; off = LINUX_FPSTATE_DATASEL_OFF; break;
+    case UNW_X86_MXCSR: is_fpstate = 1; off = LINUX_FPSTATE_MXCSR_OFF; break;
+
+      /* stacked fp registers */
+    case UNW_X86_ST0: case UNW_X86_ST1: case UNW_X86_ST2: case UNW_X86_ST3:
+    case UNW_X86_ST4: case UNW_X86_ST5: case UNW_X86_ST6: case UNW_X86_ST7:
+      is_fpstate = 1;
+      off = LINUX_FPSTATE_ST0_OFF + 10*(reg - UNW_X86_ST0);
+      break;
+
+     /* SSE fp registers */
+    case UNW_X86_XMM0_lo: case UNW_X86_XMM0_hi:
+    case UNW_X86_XMM1_lo: case UNW_X86_XMM1_hi:
+    case UNW_X86_XMM2_lo: case UNW_X86_XMM2_hi:
+    case UNW_X86_XMM3_lo: case UNW_X86_XMM3_hi:
+    case UNW_X86_XMM4_lo: case UNW_X86_XMM4_hi:
+    case UNW_X86_XMM5_lo: case UNW_X86_XMM5_hi:
+    case UNW_X86_XMM6_lo: case UNW_X86_XMM6_hi:
+    case UNW_X86_XMM7_lo: case UNW_X86_XMM7_hi:
+      is_fpstate = 1;
+      off = LINUX_FPSTATE_XMM0_OFF + 8*(reg - UNW_X86_XMM0_lo);
+      break;
+    case UNW_X86_XMM0:
+    case UNW_X86_XMM1:
+    case UNW_X86_XMM2:
+    case UNW_X86_XMM3:
+    case UNW_X86_XMM4:
+    case UNW_X86_XMM5:
+    case UNW_X86_XMM6:
+    case UNW_X86_XMM7:
+      is_fpstate = 1;
+      off = LINUX_FPSTATE_XMM0_OFF + 16*(reg - UNW_X86_XMM0);
+      break;
+
+    case UNW_X86_FOP:
+    case UNW_X86_TSS:
+    case UNW_X86_LDT:
+    default:
+      return DWARF_REG_LOC (&c->dwarf, reg);
+    }
+
+  if (is_fpstate)
+    {
+      if ((ret = dwarf_get (&c->dwarf,
+			    DWARF_MEM_LOC (&c->dwarf,
+					   addr + LINUX_SC_FPSTATE_OFF),
+			    &fpstate_addr)) < 0)
+	return DWARF_NULL_LOC;
+
+      if (!fpstate_addr)
+	return DWARF_NULL_LOC;
+
+      return DWARF_MEM_LOC (c, fpstate_addr + off);
+    }
+  else
+    return DWARF_MEM_LOC (c, addr + off);
+}
+
+#ifndef UNW_REMOTE_ONLY
+HIDDEN void *
+x86_r_uc_addr (ucontext_t *uc, int reg)
+{
+  void *addr;
+
+  switch (reg)
+    {
+    case UNW_X86_GS:  addr = &uc->uc_mcontext.gregs[REG_GS]; break;
+    case UNW_X86_FS:  addr = &uc->uc_mcontext.gregs[REG_FS]; break;
+    case UNW_X86_ES:  addr = &uc->uc_mcontext.gregs[REG_ES]; break;
+    case UNW_X86_DS:  addr = &uc->uc_mcontext.gregs[REG_DS]; break;
+    case UNW_X86_EAX: addr = &uc->uc_mcontext.gregs[REG_EAX]; break;
+    case UNW_X86_EBX: addr = &uc->uc_mcontext.gregs[REG_EBX]; break;
+    case UNW_X86_ECX: addr = &uc->uc_mcontext.gregs[REG_ECX]; break;
+    case UNW_X86_EDX: addr = &uc->uc_mcontext.gregs[REG_EDX]; break;
+    case UNW_X86_ESI: addr = &uc->uc_mcontext.gregs[REG_ESI]; break;
+    case UNW_X86_EDI: addr = &uc->uc_mcontext.gregs[REG_EDI]; break;
+    case UNW_X86_EBP: addr = &uc->uc_mcontext.gregs[REG_EBP]; break;
+    case UNW_X86_EIP: addr = &uc->uc_mcontext.gregs[REG_EIP]; break;
+    case UNW_X86_ESP: addr = &uc->uc_mcontext.gregs[REG_ESP]; break;
+    case UNW_X86_TRAPNO:  addr = &uc->uc_mcontext.gregs[REG_TRAPNO]; break;
+    case UNW_X86_CS:  addr = &uc->uc_mcontext.gregs[REG_CS]; break;
+    case UNW_X86_EFLAGS:  addr = &uc->uc_mcontext.gregs[REG_EFL]; break;
+    case UNW_X86_SS:  addr = &uc->uc_mcontext.gregs[REG_SS]; break;
+
+    default:
+      addr = NULL;
+    }
+  return addr;
+}
+
+HIDDEN int
+x86_local_resume (unw_addr_space_t as, unw_cursor_t *cursor, void *arg)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  ucontext_t *uc = c->uc;
+
+  /* Ensure c->pi is up-to-date.  On x86, it's relatively common to be
+     missing DWARF unwind info.  We don't want to fail in that case,
+     because the frame-chain still would let us do a backtrace at
+     least.  */
+  dwarf_make_proc_info (&c->dwarf);
+
+  if (unlikely (c->sigcontext_format != X86_SCF_NONE))
+    {
+      struct sigcontext *sc = (struct sigcontext *) c->sigcontext_addr;
+
+      Debug (8, "resuming at ip=%x via sigreturn(%p)\n", c->dwarf.ip, sc);
+      sigreturn (sc);
+    }
+  else
+    {
+      Debug (8, "resuming at ip=%x via setcontext()\n", c->dwarf.ip);
+      setcontext (uc);
+    }
+  return -UNW_EINVAL;
+}
+#endif
diff --git a/src/x86/Los-solaris.c b/src/x86/Los-solaris.c
new file mode 100644
index 00000000..be64b2c6
--- /dev/null
+++ b/src/x86/Los-solaris.c
@@ -0,0 +1,5 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#if defined(UNW_LOCAL_ONLY) && !defined(UNW_REMOTE_ONLY)
+#include "Gos-solaris.c"
+#endif
diff --git a/src/x86/getcontext-solaris.S b/src/x86/getcontext-solaris.S
new file mode 100644
index 00000000..c469dadb
--- /dev/null
+++ b/src/x86/getcontext-solaris.S
@@ -0,0 +1,74 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2009 Google, Inc
+	Contributed by Paul Pluzhnikov <ppluzhnikov@google.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "offsets.h"
+
+/*  int _Ux86_getcontext (ucontext_t *ucp)
+
+  Saves the machine context in UCP necessary for libunwind.
+  Unlike the libc implementation, we don't save the signal mask
+  and hence avoid the cost of a system call per unwind.
+
+*/
+
+	.global _Ux86_getcontext
+	.type _Ux86_getcontext, @function
+_Ux86_getcontext:
+	.cfi_startproc
+	mov	4(%esp),%eax  /* ucontext_t* */
+
+	/* EAX is not preserved. */
+	movl	$0, (LINUX_UC_MCONTEXT_OFF+LINUX_SC_EAX_OFF)(%eax)
+
+	movl	%ebx, (LINUX_UC_MCONTEXT_OFF+LINUX_SC_EBX_OFF)(%eax)
+	movl	%ecx, (LINUX_UC_MCONTEXT_OFF+LINUX_SC_ECX_OFF)(%eax)
+	movl	%edx, (LINUX_UC_MCONTEXT_OFF+LINUX_SC_EDX_OFF)(%eax)
+	movl	%edi, (LINUX_UC_MCONTEXT_OFF+LINUX_SC_EDI_OFF)(%eax)
+	movl	%esi, (LINUX_UC_MCONTEXT_OFF+LINUX_SC_ESI_OFF)(%eax)
+	movl	%ebp, (LINUX_UC_MCONTEXT_OFF+LINUX_SC_EBP_OFF)(%eax)
+
+	movl	(%esp), %ecx
+	movl	%ecx, (LINUX_UC_MCONTEXT_OFF+LINUX_SC_EIP_OFF)(%eax)
+
+	leal	4(%esp), %ecx		/* Exclude the return address.  */
+	movl	%ecx, (LINUX_UC_MCONTEXT_OFF+LINUX_SC_ESP_OFF)(%eax)
+
+	/* glibc getcontext saves FS, but not GS */
+	xorl	%ecx, %ecx
+	movw	%fs, %cx
+	movl	%ecx, (LINUX_UC_MCONTEXT_OFF+LINUX_SC_FS_OFF)(%eax)
+
+	leal	LINUX_UC_FPREGS_MEM_OFF(%eax), %ecx
+	movl	%ecx, (LINUX_UC_MCONTEXT_OFF+LINUX_SC_FPSTATE_OFF)(%eax)
+	fnstenv	(%ecx)
+	fldenv	(%ecx)
+
+	xor	%eax, %eax
+	ret
+	.cfi_endproc
+	.size	_Ux86_getcontext, . - _Ux86_getcontext
+
+	/* We do not need executable stack.  */
+	.section        .note.GNU-stack,"",@progbits