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From Jimi X <jimix@watson.ibm.com>:

Browse Source 
* rs6000-tdep.c (skip_prologue): Improve support for 64-bit code.
This commit is contained in:
Kevin Buettner 2003-05-29 19:47:14 +00:00
parent a197c3519c
commit 98f08d3d9b
2 changed files with 62 additions and 24 deletions
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5
gdb/ChangeLog
View File

@ -1,3 +1,8 @@
2003-05-29 Kevin Buettner <kevinb@redhat.com>
From Jimi X <jimix@watson.ibm.com>:
* rs6000-tdep.c (skip_prologue): Improve support for 64-bit code.
2003-05-28 Jim Blandy <jimb@redhat.com>
* ppc-linux-nat.c (store_altivec_registers): Don't cast fourth

81
gdb/rs6000-tdep.c
View File

@ -526,13 +526,13 @@ skip_prologue (CORE_ADDR pc, CORE_ADDR lim_pc, struct rs6000_framedata *fdata)
if ((op & 0xfc1fffff) == 0x7c0802a6)
{ /* mflr Rx */
lr_reg = (op & 0x03e00000) | 0x90010000;
lr_reg = (op & 0x03e00000);
continue;
}
else if ((op & 0xfc1fffff) == 0x7c000026)
{ /* mfcr Rx */
cr_reg = (op & 0x03e00000) | 0x90010000;
cr_reg = (op & 0x03e00000);
continue;
}
@ -558,7 +558,7 @@ skip_prologue (CORE_ADDR pc, CORE_ADDR lim_pc, struct rs6000_framedata *fdata)
{
fdata->saved_gpr = reg;
if ((op & 0xfc1f0003) == 0xf8010000)
op = (op >> 1) << 1;
op &= ~3UL;
fdata->gpr_offset = SIGNED_SHORT (op) + offset;
}
continue;
@ -590,20 +590,42 @@ skip_prologue (CORE_ADDR pc, CORE_ADDR lim_pc, struct rs6000_framedata *fdata)
continue;
}
else if (lr_reg != -1 && (op & 0xffff0000) == lr_reg)
{ /* st Rx,NUM(r1)
where Rx == lr */
fdata->lr_offset = SIGNED_SHORT (op) + offset;
else if (lr_reg != -1 &&
/* std Rx, NUM(r1) || stdu Rx, NUM(r1) */
(((op & 0xffff0000) == (lr_reg | 0xf8010000)) ||
/* stw Rx, NUM(r1) */
((op & 0xffff0000) == (lr_reg | 0x90010000)) ||
/* stwu Rx, NUM(r1) */
((op & 0xffff0000) == (lr_reg | 0x94010000))))
{ /* where Rx == lr */
fdata->lr_offset = offset;
fdata->nosavedpc = 0;
lr_reg = 0;
if ((op & 0xfc000003) == 0xf8000000 || /* std */
(op & 0xfc000000) == 0x90000000) /* stw */
{
/* Does not update r1, so add displacement to lr_offset. */
fdata->lr_offset += SIGNED_SHORT (op);
}
continue;
}
else if (cr_reg != -1 && (op & 0xffff0000) == cr_reg)
{ /* st Rx,NUM(r1)
where Rx == cr */
fdata->cr_offset = SIGNED_SHORT (op) + offset;
else if (cr_reg != -1 &&
/* std Rx, NUM(r1) || stdu Rx, NUM(r1) */
(((op & 0xffff0000) == (cr_reg | 0xf8010000)) ||
/* stw Rx, NUM(r1) */
((op & 0xffff0000) == (cr_reg | 0x90010000)) ||
/* stwu Rx, NUM(r1) */
((op & 0xffff0000) == (cr_reg | 0x94010000))))
{ /* where Rx == cr */
fdata->cr_offset = offset;
cr_reg = 0;
if ((op & 0xfc000003) == 0xf8000000 ||
(op & 0xfc000000) == 0x90000000)
{
/* Does not update r1, so add displacement to cr_offset. */
fdata->cr_offset += SIGNED_SHORT (op);
}
continue;
}
@ -647,30 +669,41 @@ skip_prologue (CORE_ADDR pc, CORE_ADDR lim_pc, struct rs6000_framedata *fdata)
this branch */
continue;
/* update stack pointer */
}
else if ((op & 0xffff0000) == 0x94210000 || /* stu r1,NUM(r1) */
(op & 0xffff0003) == 0xf8210001) /* stdu r1,NUM(r1) */
{
/* update stack pointer */
else if ((op & 0xfc1f0000) == 0x94010000)
{ /* stu rX,NUM(r1) || stwu rX,NUM(r1) */
fdata->frameless = 0;
if ((op & 0xffff0003) == 0xf8210001)
op = (op >> 1) << 1;
fdata->offset = SIGNED_SHORT (op);
offset = fdata->offset;
continue;
}
else if (op == 0x7c21016e)
{ /* stwux 1,1,0 */
else if ((op & 0xfc1f016a) == 0x7c01016e)
{ /* stwux rX,r1,rY */
/* no way to figure out what r1 is going to be */
fdata->frameless = 0;
offset = fdata->offset;
continue;
/* Load up minimal toc pointer */
}
else if ((op >> 22) == 0x20f
else if ((op & 0xfc1f0003) == 0xf8010001)
{ /* stdu rX,NUM(r1) */
fdata->frameless = 0;
fdata->offset = SIGNED_SHORT (op & ~3UL);
offset = fdata->offset;
continue;
}
else if ((op & 0xfc1f016a) == 0x7c01016a)
{ /* stdux rX,r1,rY */
/* no way to figure out what r1 is going to be */
fdata->frameless = 0;
offset = fdata->offset;
continue;
}
/* Load up minimal toc pointer */
else if (((op >> 22) == 0x20f || /* l r31,... or l r30,... */
(op >> 22) == 0x3af) /* ld r31,... or ld r30,... */
&& !minimal_toc_loaded)
{ /* l r31,... or l r30,... */
{
minimal_toc_loaded = 1;
continue;