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Detect end of stack in x86-64 rbp-based walk.

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Lassi Tuura 2010-04-20 23:13:18 +02:00 committed by Arun Sharma
parent 92cc7fd78a
commit d4fbc8326a
1 changed files with 7 additions and 1 deletions
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8
src/x86_64/Gstep.c
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@ -116,6 +116,11 @@ unw_step (unw_cursor_t *cursor)
c->dwarf.loc[RIP] = DWARF_LOC (c->dwarf.cfa, 0); c->dwarf.loc[RIP] = DWARF_LOC (c->dwarf.cfa, 0);
c->dwarf.cfa += 8; c->dwarf.cfa += 8;
} }
else if (DWARF_IS_NULL_LOC (c->dwarf.loc[RBP]))
{
for (i = 0; i < DWARF_NUM_PRESERVED_REGS; ++i)
c->dwarf.loc[i] = DWARF_NULL_LOC;
}
else else
{ {
unw_word_t rbp; unw_word_t rbp;
@ -123,7 +128,8 @@ unw_step (unw_cursor_t *cursor)
ret = dwarf_get (&c->dwarf, c->dwarf.loc[RBP], &rbp); ret = dwarf_get (&c->dwarf, c->dwarf.loc[RBP], &rbp);
if (ret < 0) if (ret < 0)
{ {
Debug (2, "returning %d\n", ret); Debug (2, "returning %d [RBP=0x%lx]\n", ret,
DWARF_GET_LOC (c->dwarf.loc[RBP]));
return ret; return ret;
} }