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If r1 has been saved in an ABI-specific frame

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(such as an interrupt frame), access the saved
value.  Otherwise, pick it up from the unwind-info
for the matching IP.

(Logical change 1.300)
This commit is contained in:
hp.com!davidm 2005-05-20 14:50:54 +00:00
parent 5b1dfeca70
commit f5de64f9f7
1 changed files with 43 additions and 14 deletions
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57
src/ia64/Gregs.c
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@ -127,7 +127,16 @@ linux_scratch_loc (struct cursor *c, unw_regnum_t reg, uint8_t *nat_bitnr)
case UNW_IA64_AR_BSPSTORE: addr += LINUX_PT_BSPSTORE_OFF; break;
case UNW_IA64_PR: addr += LINUX_PT_PR_OFF; break;
case UNW_IA64_BR + 0: addr += LINUX_PT_B0_OFF; break;
case UNW_IA64_GR + 1: addr += LINUX_PT_R1_OFF; break;
case UNW_IA64_GR + 1:
/* The saved r1 value is valid only in the frame in which
it was saved; for everything else we need to look up
the appropriate gp value. */
if (c->sigcontext_addr != c->sp + 0x10)
return IA64_NULL_LOC;
addr += LINUX_PT_R1_OFF;
break;
case UNW_IA64_GR + 12: addr += LINUX_PT_R12_OFF; break;
case UNW_IA64_GR + 13: addr += LINUX_PT_R13_OFF; break;
case UNW_IA64_AR_FPSR: addr += LINUX_PT_FPSR_OFF; break;
@ -157,8 +166,17 @@ linux_scratch_loc (struct cursor *c, unw_regnum_t reg, uint8_t *nat_bitnr)
{
switch (reg)
{
case UNW_IA64_GR + 1 ... UNW_IA64_GR + 3:
addr += LINUX_OLD_PT_R1_OFF + 8 * (reg - (UNW_IA64_GR + 1));
case UNW_IA64_GR + 1:
/* The saved r1 value is valid only in the frame in which
it was saved; for everything else we need to look up
the appropriate gp value. */
if (c->sigcontext_addr != c->sp + 0x10)
return IA64_NULL_LOC;
addr += LINUX_OLD_PT_R1_OFF;
break;
case UNW_IA64_GR + 2 ... UNW_IA64_GR + 3:
addr += LINUX_OLD_PT_R2_OFF + 8 * (reg - (UNW_IA64_GR + 2));
break;
case UNW_IA64_GR + 8 ... UNW_IA64_GR + 11:
@ -460,26 +478,24 @@ tdep_access_reg (struct cursor *c, unw_regnum_t reg, unw_word_t *valp,
*valp = 0;
return 0;
case UNW_IA64_GR + 1: /* global pointer */
if (write)
return -UNW_EREADONLYREG;
/* ensure c->pi is up-to-date: */
if ((ret = ia64_make_proc_info (c)) < 0)
return ret;
*valp = c->pi.gp;
return 0;
case UNW_IA64_NAT + 0:
case UNW_IA64_NAT + 1: /* global pointer */
if (write)
return -UNW_EREADONLYREG;
*valp = 0;
return 0;
case UNW_IA64_NAT + 1:
case UNW_IA64_NAT + 2 ... UNW_IA64_NAT + 3:
case UNW_IA64_NAT + 8 ... UNW_IA64_NAT + 31:
loc = ia64_scratch_loc (c, reg, &nat_bitnr);
if (IA64_IS_NULL_LOC (loc) && reg == UNW_IA64_NAT + 1)
{
/* access to GP */
if (write)
return -UNW_EREADONLYREG;
*valp = 0;
return 0;
}
if (!(IA64_IS_REG_LOC (loc) || IA64_IS_UC_LOC (loc)
|| IA64_IS_FP_LOC (loc)))
{
@ -520,6 +536,7 @@ tdep_access_reg (struct cursor *c, unw_regnum_t reg, unw_word_t *valp,
loc = ia64_scratch_loc (c, reg, NULL);
break;
case UNW_IA64_GR + 1: /* global pointer */
case UNW_IA64_GR + 2 ... UNW_IA64_GR + 3:
case UNW_IA64_GR + 8 ... UNW_IA64_GR + 14:
case UNW_IA64_GR + 19 ... UNW_IA64_GR + 31:
@ -531,6 +548,18 @@ tdep_access_reg (struct cursor *c, unw_regnum_t reg, unw_word_t *valp,
case UNW_IA64_AR_SSD:
case UNW_IA64_AR_CCV:
loc = ia64_scratch_loc (c, reg, NULL);
if (IA64_IS_NULL_LOC (loc) && reg == UNW_IA64_GR + 1)
{
/* access to GP */
if (write)
return -UNW_EREADONLYREG;
/* ensure c->pi is up-to-date: */
if ((ret = ia64_make_proc_info (c)) < 0)
return ret;
*valp = c->pi.gp;
return 0;
}
break;
default: