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dbghelp: Implement rudimentary stack walk for ARM.

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André Hentschel 2011-04-27 21:08:49 +02:00 committed by Alexandre Julliard
parent 518675fbb5
commit 7af9179eb9
1 changed files with 108 additions and 3 deletions
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111
dlls/dbghelp/cpu_arm.c
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@ -1,8 +1,8 @@
/*
* File cpu_arm.c
*
* Copyright (C) 2009-2009, Eric Pouech
* Copyright (C) 2010, André Hentschel
* Copyright (C) 2009 Eric Pouech
* Copyright (C) 2010, 2011 André Hentschel
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
@ -46,11 +46,116 @@ static unsigned arm_get_addr(HANDLE hThread, const CONTEXT* ctx,
}
}
#ifdef __arm__
enum st_mode {stm_start, stm_arm, stm_done};
/* indexes in Reserved array */
#define __CurrentModeCount 0
#define curr_mode (frame->Reserved[__CurrentModeCount] & 0x0F)
#define curr_count (frame->Reserved[__CurrentModeCount] >> 4)
#define set_curr_mode(m) {frame->Reserved[__CurrentModeCount] &= ~0x0F; frame->Reserved[__CurrentModeCount] |= (m & 0x0F);}
#define inc_curr_count() (frame->Reserved[__CurrentModeCount] += 0x10)
/* fetch_next_frame()
*
* modify (at least) context.Pc using unwind information
* either out of debug info (dwarf), or simple Lr trace
*/
static BOOL fetch_next_frame(struct cpu_stack_walk* csw,
CONTEXT* context, DWORD_PTR curr_pc)
{
DWORD_PTR xframe;
DWORD oldReturn = context->Lr;
if (dwarf2_virtual_unwind(csw, curr_pc, context, &xframe))
{
context->Sp = xframe;
context->Pc = oldReturn;
return TRUE;
}
if (context->Pc == context->Lr) return FALSE;
context->Pc = oldReturn;
return TRUE;
}
static BOOL arm_stack_walk(struct cpu_stack_walk* csw, LPSTACKFRAME64 frame, CONTEXT* context)
{
FIXME("not done for ARM\n");
unsigned deltapc = curr_count <= 1 ? 0 : 4;
/* sanity check */
if (curr_mode >= stm_done) return FALSE;
TRACE("Enter: PC=%s Frame=%s Return=%s Stack=%s Mode=%s Count=%s\n",
wine_dbgstr_addr(&frame->AddrPC),
wine_dbgstr_addr(&frame->AddrFrame),
wine_dbgstr_addr(&frame->AddrReturn),
wine_dbgstr_addr(&frame->AddrStack),
curr_mode == stm_start ? "start" : "ARM",
wine_dbgstr_longlong(curr_count));
if (curr_mode == stm_start)
{
if ((frame->AddrPC.Mode == AddrModeFlat) &&
(frame->AddrFrame.Mode != AddrModeFlat))
{
WARN("Bad AddrPC.Mode / AddrFrame.Mode combination\n");
goto done_err;
}
/* Init done */
set_curr_mode(stm_arm);
frame->AddrReturn.Mode = frame->AddrStack.Mode = AddrModeFlat;
/* don't set up AddrStack on first call. Either the caller has set it up, or
* we will get it in the next frame
*/
memset(&frame->AddrBStore, 0, sizeof(frame->AddrBStore));
}
else
{
if (context->Sp != frame->AddrStack.Offset) FIXME("inconsistent Stack Pointer\n");
if (context->Pc != frame->AddrPC.Offset) FIXME("inconsistent Program Counter\n");
if (frame->AddrReturn.Offset == 0) goto done_err;
if (!fetch_next_frame(csw, context, frame->AddrPC.Offset - deltapc))
goto done_err;
}
memset(&frame->Params, 0, sizeof(frame->Params));
/* set frame information */
frame->AddrStack.Offset = context->Sp;
frame->AddrReturn.Offset = context->Lr;
frame->AddrFrame.Offset = context->Fp;
frame->AddrPC.Offset = context->Pc;
frame->Far = TRUE;
frame->Virtual = TRUE;
inc_curr_count();
TRACE("Leave: PC=%s Frame=%s Return=%s Stack=%s Mode=%s Count=%s FuncTable=%p\n",
wine_dbgstr_addr(&frame->AddrPC),
wine_dbgstr_addr(&frame->AddrFrame),
wine_dbgstr_addr(&frame->AddrReturn),
wine_dbgstr_addr(&frame->AddrStack),
curr_mode == stm_start ? "start" : "ARM",
wine_dbgstr_longlong(curr_count),
frame->FuncTableEntry);
return TRUE;
done_err:
set_curr_mode(stm_done);
return FALSE;
}
#else
static BOOL arm_stack_walk(struct cpu_stack_walk* csw, LPSTACKFRAME64 frame, CONTEXT* context)
{
return FALSE;
}
#endif
static unsigned arm_map_dwarf_register(unsigned regno)
{