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(tdep_access_reg): When writing RAX/RDX, update eh_args[] and

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eh_valid_mask instead.  When reading and the corresponding
	eh_valid_mask bit is set, read from eh_args[] instead.

2004/11/17 02:43:39-08:00 mostang.com!davidm
(tdep_access_reg): Treat UNW_X86_64_RSP exactly like UNW_X86_64_CFA.

(Logical change 1.290)
This commit is contained in:
hp.com!davidm 2005-05-03 09:13:17 +00:00
parent 5b0507c432
commit 555bae8aa3
1 changed files with 21 additions and 10 deletions
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31
src/x86_64/Gregs.c
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@ -62,6 +62,8 @@ tdep_access_reg (struct cursor *c, unw_regnum_t reg, unw_word_t *valp,
int write) int write)
{ {
dwarf_loc_t loc = DWARF_NULL_LOC; dwarf_loc_t loc = DWARF_NULL_LOC;
unsigned int mask;
int arg_num;
switch (reg) switch (reg)
{ {
@ -73,25 +75,34 @@ tdep_access_reg (struct cursor *c, unw_regnum_t reg, unw_word_t *valp,
break; break;
case UNW_X86_64_CFA: case UNW_X86_64_CFA:
case UNW_X86_64_RSP:
if (write) if (write)
return -UNW_EREADONLYREG; return -UNW_EREADONLYREG;
*valp = c->dwarf.cfa; *valp = c->dwarf.cfa;
return 0; return 0;
case UNW_X86_64_RAX: loc = c->dwarf.loc[RAX]; break; case UNW_X86_64_RAX:
case UNW_X86_64_RCX: loc = c->dwarf.loc[RCX]; break; case UNW_X86_64_RDX:
case UNW_X86_64_RDX: loc = c->dwarf.loc[RDX]; break; arg_num = reg - UNW_X86_64_RAX;
case UNW_X86_64_RBX: loc = c->dwarf.loc[RBX]; break; mask = (1 << arg_num);
case UNW_X86_64_RSP: if (write)
if (c->dwarf.cfa_is_sp)
{ {
if (write) c->dwarf.eh_args[arg_num] = *valp;
return -UNW_EREADONLYREG; c->dwarf.eh_valid_mask |= mask;
*valp = c->dwarf.cfa;
return 0; return 0;
} }
loc = c->dwarf.loc[RSP]; else if ((c->dwarf.eh_valid_mask & mask) != 0)
{
*valp = c->dwarf.eh_args[arg_num];
return 0;
}
else
loc = c->dwarf.loc[(reg == UNW_X86_64_RAX) ? RAX : RDX];
break; break;
case UNW_X86_64_RCX: loc = c->dwarf.loc[RCX]; break;
case UNW_X86_64_RBX: loc = c->dwarf.loc[RBX]; break;
case UNW_X86_64_RBP: loc = c->dwarf.loc[RBP]; break; case UNW_X86_64_RBP: loc = c->dwarf.loc[RBP]; break;
case UNW_X86_64_RSI: loc = c->dwarf.loc[RSI]; break; case UNW_X86_64_RSI: loc = c->dwarf.loc[RSI]; break;
case UNW_X86_64_RDI: loc = c->dwarf.loc[RDI]; break; case UNW_X86_64_RDI: loc = c->dwarf.loc[RDI]; break;