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* i386-tdep.c (i386_frame_prev_register): Unwind SP from memory

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if neither saved value nor register available (e.g. signal frame).
This commit is contained in:
Ulrich Weigand
2011-03-31 16:16:57 +00:00
parent ee6436e3c7
commit fcf250e2ba
2 changed files with 8 additions and 2 deletions
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5
gdb/i386-tdep.c
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@@ -1798,12 +1798,13 @@ i386_frame_prev_register (struct frame_info *this_frame, void **this_cache,
if (regnum == I386_EIP_REGNUM && cache->pc_in_eax)
return frame_unwind_got_register (this_frame, regnum, I386_EAX_REGNUM);
if (regnum == I386_ESP_REGNUM)
if (regnum == I386_ESP_REGNUM
&& (cache->saved_sp != 0 || cache->saved_sp_reg != -1))
{
/* If the SP has been saved, but we don't know where, then this
means that SAVED_SP_REG register was found unavailable back
when we built the cache. */
if (cache->saved_sp == 0 && cache->saved_sp_reg != -1)
if (cache->saved_sp == 0)
return frame_unwind_got_register (this_frame, regnum,
cache->saved_sp_reg);
else