[thirdparty/gcc.git] / libgcc / config / i386 / sol2-unwind.h

/* DWARF2 EH unwinding support for AMD x86-64 and x86.
   Copyright (C) 2009, 2010 Free Software Foundation, Inc.

This file is part of GCC.

GCC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.

GCC 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 General Public License for more details.

Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.

You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
<http://www.gnu.org/licenses/>.  */

/* Do code reading to identify a signal frame, and set the frame
   state data appropriately.  See unwind-dw2.c for the structs.  */

#include <ucontext.h>
#include <sys/frame.h>

#ifdef __x86_64__

#define MD_FALLBACK_FRAME_STATE_FOR x86_64_fallback_frame_state

static _Unwind_Reason_Code
x86_64_fallback_frame_state (struct _Unwind_Context *context,
			     _Unwind_FrameState *fs)
{
  unsigned char *pc = context->ra;
  mcontext_t *mctx;
  long new_cfa;

  if (/* Solaris 10+
	------------
	<__sighndlr+0>:      push   %rbp
	<__sighndlr+1>:      mov    %rsp,%rbp
	<__sighndlr+4>:      callq  *%rcx
	<__sighndlr+6>:      leaveq           <--- PC
	<__sighndlr+7>:      retq  */
      *(unsigned long *)(pc - 6) == 0xc3c9d1ffe5894855)

    /* We need to move up three frames:

		<signal handler>	<-- context->cfa
		__sighndlr
		call_user_handler
		sigacthandler
		<kernel>

       context->cfa points into the frame after the saved frame pointer and
       saved pc (struct frame).

       The ucontext_t structure is in the kernel frame after the signal
       number and a siginfo_t *.  Since the frame sizes vary even within
       Solaris 10 updates, we need to walk the stack to get there.  */
    {
      struct frame *fp = (struct frame *) context->cfa - 1;
      struct handler_args {
	int signo;
	siginfo_t *sip;
	ucontext_t ucontext;
      } *handler_args;
      ucontext_t *ucp;

      /* Next frame: __sighndlr frame pointer.  */
      fp = (struct frame *) fp->fr_savfp;
      /* call_user_handler frame pointer.  */
      fp = (struct frame *) fp->fr_savfp;
      /* sigacthandler frame pointer.  */
      fp = (struct frame *) fp->fr_savfp;

      /* The argument area precedes the struct frame.  */
      handler_args = (struct handler_args *) (fp + 1);
      ucp = &handler_args->ucontext;
      mctx = &ucp->uc_mcontext;
    }
  else
    return _URC_END_OF_STACK;

  new_cfa = mctx->gregs[REG_RSP];

  fs->regs.cfa_how = CFA_REG_OFFSET;
  fs->regs.cfa_reg = 7;
  fs->regs.cfa_offset = new_cfa - (long) context->cfa;

  /* The SVR4 register numbering macros aren't usable in libgcc.  */
  fs->regs.reg[0].how = REG_SAVED_OFFSET;
  fs->regs.reg[0].loc.offset = (long)&mctx->gregs[REG_RAX] - new_cfa;
  fs->regs.reg[1].how = REG_SAVED_OFFSET;
  fs->regs.reg[1].loc.offset = (long)&mctx->gregs[REG_RDX] - new_cfa;
  fs->regs.reg[2].how = REG_SAVED_OFFSET;
  fs->regs.reg[2].loc.offset = (long)&mctx->gregs[REG_RCX] - new_cfa;
  fs->regs.reg[3].how = REG_SAVED_OFFSET;
  fs->regs.reg[3].loc.offset = (long)&mctx->gregs[REG_RBX] - new_cfa;
  fs->regs.reg[4].how = REG_SAVED_OFFSET;
  fs->regs.reg[4].loc.offset = (long)&mctx->gregs[REG_RSI] - new_cfa;
  fs->regs.reg[5].how = REG_SAVED_OFFSET;
  fs->regs.reg[5].loc.offset = (long)&mctx->gregs[REG_RDI] - new_cfa;
  fs->regs.reg[6].how = REG_SAVED_OFFSET;
  fs->regs.reg[6].loc.offset = (long)&mctx->gregs[REG_RBP] - new_cfa;
  fs->regs.reg[8].how = REG_SAVED_OFFSET;
  fs->regs.reg[8].loc.offset = (long)&mctx->gregs[REG_R8] - new_cfa;
  fs->regs.reg[9].how = REG_SAVED_OFFSET;
  fs->regs.reg[9].loc.offset = (long)&mctx->gregs[REG_R9] - new_cfa;
  fs->regs.reg[10].how = REG_SAVED_OFFSET;
  fs->regs.reg[10].loc.offset = (long)&mctx->gregs[REG_R10] - new_cfa;
  fs->regs.reg[11].how = REG_SAVED_OFFSET;
  fs->regs.reg[11].loc.offset = (long)&mctx->gregs[REG_R11] - new_cfa;
  fs->regs.reg[12].how = REG_SAVED_OFFSET;
  fs->regs.reg[12].loc.offset = (long)&mctx->gregs[REG_R12] - new_cfa;
  fs->regs.reg[13].how = REG_SAVED_OFFSET;
  fs->regs.reg[13].loc.offset = (long)&mctx->gregs[REG_R13] - new_cfa;
  fs->regs.reg[14].how = REG_SAVED_OFFSET;
  fs->regs.reg[14].loc.offset = (long)&mctx->gregs[REG_R14] - new_cfa;
  fs->regs.reg[15].how = REG_SAVED_OFFSET;
  fs->regs.reg[15].loc.offset = (long)&mctx->gregs[REG_R15] - new_cfa;
  fs->regs.reg[16].how = REG_SAVED_OFFSET;
  fs->regs.reg[16].loc.offset = (long)&mctx->gregs[REG_RIP] - new_cfa;
  fs->retaddr_column = 16;
  fs->signal_frame = 1;

  return _URC_NO_REASON;
}

#else

#define MD_FALLBACK_FRAME_STATE_FOR x86_fallback_frame_state

static _Unwind_Reason_Code
x86_fallback_frame_state (struct _Unwind_Context *context,
			  _Unwind_FrameState *fs)
{
  unsigned char *pc = context->ra;
  mcontext_t *mctx;
  long new_cfa;

  if (/* Solaris 8 - single-threaded
	----------------------------
	<sigacthandler+17>:  mov    0x10(%ebp),%esi
	<sigacthandler+20>:  push   %esi
	<sigacthandler+21>:  pushl  0xc(%ebp)
	<sigacthandler+24>:  mov    0x8(%ebp),%ecx
	<sigacthandler+27>:  push   %ecx
	<sigacthandler+28>:  mov    offset(%ebx),%eax
	<sigacthandler+34>:  call   *(%eax,%ecx,4)
	<sigacthandler+37>:  add    $0xc,%esp        <--- PC
	<sigacthandler+40>:  push   %esi ... */
      (*(unsigned long *)(pc - 20) == 0x5610758b
       && *(unsigned long *)(pc - 16) == 0x8b0c75ff
       && *(unsigned long *)(pc - 12) == 0x8b51084d
       && *(unsigned char *)(pc - 8)  == 0x83
       && *(unsigned long *)(pc - 4)  == 0x8814ff00
       && *(unsigned long *)(pc - 0)  == 0x560cc483)

      || /* Solaris 8 - multi-threaded
	   ---------------------------
	   <__sighndlr+0>:      push   %ebp
	   <__sighndlr+1>:      mov    %esp,%ebp
	   <__sighndlr+3>:      pushl  0x10(%ebp)
	   <__sighndlr+6>:      pushl  0xc(%ebp)
	   <__sighndlr+9>:      pushl  0x8(%ebp)
	   <__sighndlr+12>:     call   *0x14(%ebp)
	   <__sighndlr+15>:     leave               <--- PC  */
	 (*(unsigned long *)(pc - 15) == 0xffec8b55
	  && *(unsigned long *)(pc - 11) == 0x75ff1075
	  && *(unsigned long *)(pc - 7)  == 0x0875ff0c
	  && *(unsigned long *)(pc - 3)  == 0xc91455ff)

      || /* Solaris 9 - single-threaded
	   ----------------------------
           <sigacthandler+16>:    mov    0x244(%ebx),%ecx
	   <sigacthandler+22>:    mov    0x8(%ebp),%eax
	   <sigacthandler+25>:    mov    (%ecx,%eax,4),%ecx
	   <sigacthandler+28>:    pushl  0x10(%ebp)
	   <sigacthandler+31>:    pushl  0xc(%ebp)
	   <sigacthandler+34>:    push   %eax
	   <sigacthandler+35>:    call   *%ecx
	   <sigacthandler+37>:    add    $0xc,%esp	<--- PC
	   <sigacthandler+40>:    pushl  0x10(%ebp) */
         (*(unsigned long *)(pc - 21) == 0x2448b8b
	  && *(unsigned long *)(pc - 17) == 0x458b0000
	  && *(unsigned long *)(pc - 13) == 0x810c8b08
	  && *(unsigned long *)(pc - 9)  == 0xff1075ff
	  && *(unsigned long *)(pc - 5)  == 0xff500c75
	  && *(unsigned long *)(pc - 1)  == 0xcc483d1)

      || /* Solaris 9 - multi-threaded, Solaris 10
	   ---------------------------------------
	   <__sighndlr+0>:      push   %ebp
	   <__sighndlr+1>:      mov    %esp,%ebp
	   <__sighndlr+3>:      pushl  0x10(%ebp)
	   <__sighndlr+6>:      pushl  0xc(%ebp)
	   <__sighndlr+9>:      pushl  0x8(%ebp)
	   <__sighndlr+12>:     call   *0x14(%ebp)
	   <__sighndlr+15>:     add    $0xc,%esp     <--- PC
	   <__sighndlr+18>:     leave
	   <__sighndlr+19>:     ret  */
	 (*(unsigned long *)(pc - 15) == 0xffec8b55
	  && *(unsigned long *)(pc - 11) == 0x75ff1075
	  && *(unsigned long *)(pc - 7)  == 0x0875ff0c
	  && *(unsigned long *)(pc - 3)  == 0x831455ff
	  && *(unsigned long *)(pc + 1)  == 0xc3c90cc4)

      || /* Solaris 11 before snv_125
	   --------------------------
	  <__sighndlr+0>       	push   %ebp
	  <__sighndlr+1>       	mov    %esp,%ebp
	  <__sighndlr+4>      	pushl  0x10(%ebp)
	  <__sighndlr+6>      	pushl  0xc(%ebp)
	  <__sighndlr+9>      	pushl  0x8(%ebp)
	  <__sighndlr+12>      	call   *0x14(%ebp)
	  <__sighndlr+15>	add    $0xc,%esp
	  <__sighndlr+18>      	leave                <--- PC
	  <__sighndlr+19>      	ret  */
	 (*(unsigned long *)(pc - 18) == 0xffec8b55
	  && *(unsigned long *)(pc - 14) == 0x7fff107f
	  && *(unsigned long *)(pc - 10)  == 0x0875ff0c
	  && *(unsigned long *)(pc - 6)  == 0x83145fff
	  && *(unsigned long *)(pc - 1)  == 0xc3c90cc4)

      || /* Solaris 11 since snv_125
	   -------------------------
	  <__sighndlr+0>       	push   %ebp
	  <__sighndlr+1>       	mov    %esp,%ebp
	  <__sighndlr+3>       	and    $0xfffffff0,%esp
	  <__sighndlr+6>       	sub    $0x4,%esp
	  <__sighndlr+9>      	pushl  0x10(%ebp)
	  <__sighndlr+12>      	pushl  0xc(%ebp)
	  <__sighndlr+15>      	pushl  0x8(%ebp)
	  <__sighndlr+18>      	call   *0x14(%ebp)
	  <__sighndlr+21>      	leave                <--- PC
	  <__sighndlr+22>      	ret  */
	 (*(unsigned long *)(pc - 21) == 0x83ec8b55
	  && *(unsigned long *)(pc - 17) == 0xec83f0e4
	  && *(unsigned long *)(pc - 13)  == 0x1075ff04
	  && *(unsigned long *)(pc - 9)  == 0xff0c75ff
	  && *(unsigned long *)(pc - 5)  == 0x55ff0875
	  && (*(unsigned long *)(pc - 1) & 0x00ffffff) == 0x00c3c914))
    {
      struct handler_args {
	int signo;
	siginfo_t *sip;
	ucontext_t *ucontext;
      } *handler_args = context->cfa;
      mctx = &handler_args->ucontext->uc_mcontext;
    }
  else
    return _URC_END_OF_STACK;

  new_cfa = mctx->gregs[UESP];

  fs->regs.cfa_how = CFA_REG_OFFSET;
  fs->regs.cfa_reg = 4;
  fs->regs.cfa_offset = new_cfa - (long) context->cfa;

  /* The SVR4 register numbering macros aren't usable in libgcc.  */
  fs->regs.reg[0].how = REG_SAVED_OFFSET;
  fs->regs.reg[0].loc.offset = (long)&mctx->gregs[EAX] - new_cfa;
  fs->regs.reg[3].how = REG_SAVED_OFFSET;
  fs->regs.reg[3].loc.offset = (long)&mctx->gregs[EBX] - new_cfa;
  fs->regs.reg[1].how = REG_SAVED_OFFSET;
  fs->regs.reg[1].loc.offset = (long)&mctx->gregs[ECX] - new_cfa;
  fs->regs.reg[2].how = REG_SAVED_OFFSET;
  fs->regs.reg[2].loc.offset = (long)&mctx->gregs[EDX] - new_cfa;
  fs->regs.reg[6].how = REG_SAVED_OFFSET;
  fs->regs.reg[6].loc.offset = (long)&mctx->gregs[ESI] - new_cfa;
  fs->regs.reg[7].how = REG_SAVED_OFFSET;
  fs->regs.reg[7].loc.offset = (long)&mctx->gregs[EDI] - new_cfa;
  fs->regs.reg[5].how = REG_SAVED_OFFSET;
  fs->regs.reg[5].loc.offset = (long)&mctx->gregs[EBP] - new_cfa;
  fs->regs.reg[8].how = REG_SAVED_OFFSET;
  fs->regs.reg[8].loc.offset = (long)&mctx->gregs[EIP] - new_cfa;
  fs->retaddr_column = 8;
  fs->signal_frame = 1;

  return _URC_NO_REASON;
}

#endif
Commit	Line	Data
8d232178	1	/* DWARF2 EH unwinding support for AMD x86-64 and x86.
ea2d8f12	2	Copyright (C) 2009, 2010 Free Software Foundation, Inc.
8d232178 OH	3
	4	This file is part of GCC.
	5
	6	GCC is free software; you can redistribute it and/or modify
	7	it under the terms of the GNU General Public License as published by
	8	the Free Software Foundation; either version 3, or (at your option)
	9	any later version.
	10
	11	GCC is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	GNU General Public License for more details.
	15
	16	Under Section 7 of GPL version 3, you are granted additional
	17	permissions described in the GCC Runtime Library Exception, version
	18	3.1, as published by the Free Software Foundation.
	19
	20	You should have received a copy of the GNU General Public License and
	21	a copy of the GCC Runtime Library Exception along with this program;
	22	see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
	23	<http://www.gnu.org/licenses/>. */
	24
	25	/* Do code reading to identify a signal frame, and set the frame
	26	state data appropriately. See unwind-dw2.c for the structs. */
	27
	28	#include <ucontext.h>
ea2d8f12	29	#include <sys/frame.h>
8d232178 OH	30
	31	#ifdef __x86_64__
	32
	33	#define MD_FALLBACK_FRAME_STATE_FOR x86_64_fallback_frame_state
	34
	35	static _Unwind_Reason_Code
	36	x86_64_fallback_frame_state (struct _Unwind_Context *context,
	37	_Unwind_FrameState *fs)
	38	{
	39	unsigned char *pc = context->ra;
	40	mcontext_t *mctx;
	41	long new_cfa;
	42
ea2d8f12	43	if (/* Solaris 10+
8d232178 OH	44	------------
	45	<__sighndlr+0>: push %rbp
	46	<__sighndlr+1>: mov %rsp,%rbp
	47	<__sighndlr+4>: callq *%rcx
	48	<__sighndlr+6>: leaveq <--- PC
	49	<__sighndlr+7>: retq */
	50	(unsigned long )(pc - 6) == 0xc3c9d1ffe5894855)
ea2d8f12 RO	51
	52	/* We need to move up three frames:
	53
	54	<signal handler> <-- context->cfa
	55	__sighndlr
	56	call_user_handler
	57	sigacthandler
	58	<kernel>
	59
	60	context->cfa points into the frame after the saved frame pointer and
	61	saved pc (struct frame).
	62
	63	The ucontext_t structure is in the kernel frame after the signal
	64	number and a siginfo_t *. Since the frame sizes vary even within
	65	Solaris 10 updates, we need to walk the stack to get there. */
8d232178	66	{
ea2d8f12 RO	67	struct frame fp = (struct frame ) context->cfa - 1;
	68	struct handler_args {
	69	int signo;
	70	siginfo_t *sip;
	71	ucontext_t ucontext;
	72	} *handler_args;
	73	ucontext_t *ucp;
	74
	75	/* Next frame: __sighndlr frame pointer. */
	76	fp = (struct frame *) fp->fr_savfp;
	77	/* call_user_handler frame pointer. */
	78	fp = (struct frame *) fp->fr_savfp;
	79	/* sigacthandler frame pointer. */
	80	fp = (struct frame *) fp->fr_savfp;
	81
	82	/* The argument area precedes the struct frame. */
	83	handler_args = (struct handler_args *) (fp + 1);
	84	ucp = &handler_args->ucontext;
	85	mctx = &ucp->uc_mcontext;
8d232178 OH	86	}
	87	else
	88	return _URC_END_OF_STACK;
	89
	90	new_cfa = mctx->gregs[REG_RSP];
	91
	92	fs->regs.cfa_how = CFA_REG_OFFSET;
	93	fs->regs.cfa_reg = 7;
	94	fs->regs.cfa_offset = new_cfa - (long) context->cfa;
	95
	96	/* The SVR4 register numbering macros aren't usable in libgcc. */
	97	fs->regs.reg[0].how = REG_SAVED_OFFSET;
	98	fs->regs.reg[0].loc.offset = (long)&mctx->gregs[REG_RAX] - new_cfa;
	99	fs->regs.reg[1].how = REG_SAVED_OFFSET;
	100	fs->regs.reg[1].loc.offset = (long)&mctx->gregs[REG_RDX] - new_cfa;
	101	fs->regs.reg[2].how = REG_SAVED_OFFSET;
	102	fs->regs.reg[2].loc.offset = (long)&mctx->gregs[REG_RCX] - new_cfa;
	103	fs->regs.reg[3].how = REG_SAVED_OFFSET;
	104	fs->regs.reg[3].loc.offset = (long)&mctx->gregs[REG_RBX] - new_cfa;
	105	fs->regs.reg[4].how = REG_SAVED_OFFSET;
	106	fs->regs.reg[4].loc.offset = (long)&mctx->gregs[REG_RSI] - new_cfa;
	107	fs->regs.reg[5].how = REG_SAVED_OFFSET;
	108	fs->regs.reg[5].loc.offset = (long)&mctx->gregs[REG_RDI] - new_cfa;
	109	fs->regs.reg[6].how = REG_SAVED_OFFSET;
	110	fs->regs.reg[6].loc.offset = (long)&mctx->gregs[REG_RBP] - new_cfa;
	111	fs->regs.reg[8].how = REG_SAVED_OFFSET;
	112	fs->regs.reg[8].loc.offset = (long)&mctx->gregs[REG_R8] - new_cfa;
	113	fs->regs.reg[9].how = REG_SAVED_OFFSET;
	114	fs->regs.reg[9].loc.offset = (long)&mctx->gregs[REG_R9] - new_cfa;
	115	fs->regs.reg[10].how = REG_SAVED_OFFSET;
	116	fs->regs.reg[10].loc.offset = (long)&mctx->gregs[REG_R10] - new_cfa;
	117	fs->regs.reg[11].how = REG_SAVED_OFFSET;
	118	fs->regs.reg[11].loc.offset = (long)&mctx->gregs[REG_R11] - new_cfa;
	119	fs->regs.reg[12].how = REG_SAVED_OFFSET;
	120	fs->regs.reg[12].loc.offset = (long)&mctx->gregs[REG_R12] - new_cfa;
	121	fs->regs.reg[13].how = REG_SAVED_OFFSET;
	122	fs->regs.reg[13].loc.offset = (long)&mctx->gregs[REG_R13] - new_cfa;
	123	fs->regs.reg[14].how = REG_SAVED_OFFSET;
	124	fs->regs.reg[14].loc.offset = (long)&mctx->gregs[REG_R14] - new_cfa;
	125	fs->regs.reg[15].how = REG_SAVED_OFFSET;
	126	fs->regs.reg[15].loc.offset = (long)&mctx->gregs[REG_R15] - new_cfa;
	127	fs->regs.reg[16].how = REG_SAVED_OFFSET;
	128	fs->regs.reg[16].loc.offset = (long)&mctx->gregs[REG_RIP] - new_cfa;
	129	fs->retaddr_column = 16;
	130	fs->signal_frame = 1;
	131
	132	return _URC_NO_REASON;
	133	}
	134
	135	#else
	136
	137	#define MD_FALLBACK_FRAME_STATE_FOR x86_fallback_frame_state
	138
	139	static _Unwind_Reason_Code
	140	x86_fallback_frame_state (struct _Unwind_Context *context,
	141	_Unwind_FrameState *fs)
	142	{
	143	unsigned char *pc = context->ra;
	144	mcontext_t *mctx;
	145	long new_cfa;
	146
ea2d8f12 RO	147	if (/* Solaris 8 - single-threaded
ea2d8f12 RO	148	----------------------------
8d232178 OH	149	<sigacthandler+17>: mov 0x10(%ebp),%esi
	150	<sigacthandler+20>: push %esi
	151	<sigacthandler+21>: pushl 0xc(%ebp)
	152	<sigacthandler+24>: mov 0x8(%ebp),%ecx
	153	<sigacthandler+27>: push %ecx
	154	<sigacthandler+28>: mov offset(%ebx),%eax
	155	<sigacthandler+34>: call *(%eax,%ecx,4)
	156	<sigacthandler+37>: add $0xc,%esp <--- PC
	157	<sigacthandler+40>: push %esi ... */
	158	((unsigned long )(pc - 20) == 0x5610758b
	159	&& (unsigned long )(pc - 16) == 0x8b0c75ff
	160	&& (unsigned long )(pc - 12) == 0x8b51084d
	161	&& (unsigned char )(pc - 8) == 0x83
	162	&& (unsigned long )(pc - 4) == 0x8814ff00
	163	&& (unsigned long )(pc - 0) == 0x560cc483)
	164
ea2d8f12	165	\|\| /* Solaris 8 - multi-threaded
8d232178 OH	166	---------------------------
	167	<__sighndlr+0>: push %ebp
	168	<__sighndlr+1>: mov %esp,%ebp
	169	<__sighndlr+3>: pushl 0x10(%ebp)
	170	<__sighndlr+6>: pushl 0xc(%ebp)
	171	<__sighndlr+9>: pushl 0x8(%ebp)
	172	<__sighndlr+12>: call *0x14(%ebp)
	173	<__sighndlr+15>: leave <--- PC */
	174	((unsigned long )(pc - 15) == 0xffec8b55
	175	&& (unsigned long )(pc - 11) == 0x75ff1075
	176	&& (unsigned long )(pc - 7) == 0x0875ff0c
	177	&& (unsigned long )(pc - 3) == 0xc91455ff)
	178
ea2d8f12 RO	179	\|\| /* Solaris 9 - single-threaded
	180	----------------------------
	181	<sigacthandler+16>: mov 0x244(%ebx),%ecx
	182	<sigacthandler+22>: mov 0x8(%ebp),%eax
	183	<sigacthandler+25>: mov (%ecx,%eax,4),%ecx
	184	<sigacthandler+28>: pushl 0x10(%ebp)
	185	<sigacthandler+31>: pushl 0xc(%ebp)
	186	<sigacthandler+34>: push %eax
	187	<sigacthandler+35>: call *%ecx
	188	<sigacthandler+37>: add $0xc,%esp <--- PC
	189	<sigacthandler+40>: pushl 0x10(%ebp) */
	190	((unsigned long )(pc - 21) == 0x2448b8b
	191	&& (unsigned long )(pc - 17) == 0x458b0000
	192	&& (unsigned long )(pc - 13) == 0x810c8b08
	193	&& (unsigned long )(pc - 9) == 0xff1075ff
	194	&& (unsigned long )(pc - 5) == 0xff500c75
	195	&& (unsigned long )(pc - 1) == 0xcc483d1)
	196
	197	\|\| /* Solaris 9 - multi-threaded, Solaris 10
	198	---------------------------------------
8d232178 OH	199	<__sighndlr+0>: push %ebp
	200	<__sighndlr+1>: mov %esp,%ebp
	201	<__sighndlr+3>: pushl 0x10(%ebp)
	202	<__sighndlr+6>: pushl 0xc(%ebp)
	203	<__sighndlr+9>: pushl 0x8(%ebp)
	204	<__sighndlr+12>: call *0x14(%ebp)
	205	<__sighndlr+15>: add $0xc,%esp <--- PC
	206	<__sighndlr+18>: leave
	207	<__sighndlr+19>: ret */
	208	((unsigned long )(pc - 15) == 0xffec8b55
	209	&& (unsigned long )(pc - 11) == 0x75ff1075
	210	&& (unsigned long )(pc - 7) == 0x0875ff0c
	211	&& (unsigned long )(pc - 3) == 0x831455ff
ea2d8f12 RO	212	&& (unsigned long )(pc + 1) == 0xc3c90cc4)
	213
	214	\|\| /* Solaris 11 before snv_125
	215	--------------------------
	216	<__sighndlr+0> push %ebp
	217	<__sighndlr+1> mov %esp,%ebp
	218	<__sighndlr+4> pushl 0x10(%ebp)
	219	<__sighndlr+6> pushl 0xc(%ebp)
	220	<__sighndlr+9> pushl 0x8(%ebp)
	221	<__sighndlr+12> call *0x14(%ebp)
	222	<__sighndlr+15> add $0xc,%esp
	223	<__sighndlr+18> leave <--- PC
	224	<__sighndlr+19> ret */
	225	((unsigned long )(pc - 18) == 0xffec8b55
	226	&& (unsigned long )(pc - 14) == 0x7fff107f
	227	&& (unsigned long )(pc - 10) == 0x0875ff0c
	228	&& (unsigned long )(pc - 6) == 0x83145fff
	229	&& (unsigned long )(pc - 1) == 0xc3c90cc4)
	230
	231	\|\| /* Solaris 11 since snv_125
	232	-------------------------
	233	<__sighndlr+0> push %ebp
	234	<__sighndlr+1> mov %esp,%ebp
	235	<__sighndlr+3> and $0xfffffff0,%esp
	236	<__sighndlr+6> sub $0x4,%esp
	237	<__sighndlr+9> pushl 0x10(%ebp)
	238	<__sighndlr+12> pushl 0xc(%ebp)
	239	<__sighndlr+15> pushl 0x8(%ebp)
	240	<__sighndlr+18> call *0x14(%ebp)
	241	<__sighndlr+21> leave <--- PC
	242	<__sighndlr+22> ret */
	243	((unsigned long )(pc - 21) == 0x83ec8b55
	244	&& (unsigned long )(pc - 17) == 0xec83f0e4
	245	&& (unsigned long )(pc - 13) == 0x1075ff04
	246	&& (unsigned long )(pc - 9) == 0xff0c75ff
	247	&& (unsigned long )(pc - 5) == 0x55ff0875
	248	&& ((unsigned long )(pc - 1) & 0x00ffffff) == 0x00c3c914))
8d232178 OH	249	{
	250	struct handler_args {
	251	int signo;
	252	siginfo_t *sip;
	253	ucontext_t *ucontext;
	254	} *handler_args = context->cfa;
	255	mctx = &handler_args->ucontext->uc_mcontext;
	256	}
	257	else
	258	return _URC_END_OF_STACK;
	259
	260	new_cfa = mctx->gregs[UESP];
	261
	262	fs->regs.cfa_how = CFA_REG_OFFSET;
	263	fs->regs.cfa_reg = 4;
	264	fs->regs.cfa_offset = new_cfa - (long) context->cfa;
	265
	266	/* The SVR4 register numbering macros aren't usable in libgcc. */
	267	fs->regs.reg[0].how = REG_SAVED_OFFSET;
	268	fs->regs.reg[0].loc.offset = (long)&mctx->gregs[EAX] - new_cfa;
	269	fs->regs.reg[3].how = REG_SAVED_OFFSET;
	270	fs->regs.reg[3].loc.offset = (long)&mctx->gregs[EBX] - new_cfa;
	271	fs->regs.reg[1].how = REG_SAVED_OFFSET;
	272	fs->regs.reg[1].loc.offset = (long)&mctx->gregs[ECX] - new_cfa;
	273	fs->regs.reg[2].how = REG_SAVED_OFFSET;
	274	fs->regs.reg[2].loc.offset = (long)&mctx->gregs[EDX] - new_cfa;
	275	fs->regs.reg[6].how = REG_SAVED_OFFSET;
	276	fs->regs.reg[6].loc.offset = (long)&mctx->gregs[ESI] - new_cfa;
	277	fs->regs.reg[7].how = REG_SAVED_OFFSET;
	278	fs->regs.reg[7].loc.offset = (long)&mctx->gregs[EDI] - new_cfa;
	279	fs->regs.reg[5].how = REG_SAVED_OFFSET;
	280	fs->regs.reg[5].loc.offset = (long)&mctx->gregs[EBP] - new_cfa;
	281	fs->regs.reg[8].how = REG_SAVED_OFFSET;
	282	fs->regs.reg[8].loc.offset = (long)&mctx->gregs[EIP] - new_cfa;
	283	fs->retaddr_column = 8;
	284	fs->signal_frame = 1;
	285
	286	return _URC_NO_REASON;
	287	}
	288
	289	#endif