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* rs6000-tdep.c (skip_prologue): Recognize moves from argument

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registers to temp register r0 and byte stores as prologue
instructions.
This commit is contained in:
Jim Blandy 2004-03-29 03:41:56 +00:00
parent 72c8f5e391
commit e802b91571
2 changed files with 19 additions and 4 deletions
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6
gdb/ChangeLog
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@ -1,3 +1,9 @@
2004-03-28 Jim Blandy <jimb@redhat.com>
* rs6000-tdep.c (skip_prologue): Recognize moves from argument
registers to temp register r0 and byte stores as prologue
instructions.
2004-03-28 Andrew Cagney <cagney@redhat.com>
* PROBLEMS (Stack backtraces): Rewrite. Remove reference to

17
gdb/rs6000-tdep.c
View file

@ -700,6 +700,14 @@ skip_prologue (CORE_ADDR pc, CORE_ADDR lim_pc, struct rs6000_framedata *fdata)
/* store parameters in stack */
}
/* Move parameters from argument registers to temporary register. */
else if ((op & 0xfc0007fe) == 0x7c000378 && /* mr(.) Rx,Ry */
(((op >> 21) & 31) >= 3) && /* R3 >= Ry >= R10 */
(((op >> 21) & 31) <= 10) &&
(((op >> 16) & 31) == 0)) /* Rx: scratch register r0 */
{
continue;
}
else if ((op & 0xfc1f0003) == 0xf8010000 || /* std rx,NUM(r1) */
(op & 0xfc1f0000) == 0xd8010000 || /* stfd Rx,NUM(r1) */
(op & 0xfc1f0000) == 0xfc010000) /* frsp, fp?,NUM(r1) */
@ -709,10 +717,11 @@ skip_prologue (CORE_ADDR pc, CORE_ADDR lim_pc, struct rs6000_framedata *fdata)
/* store parameters in stack via frame pointer */
}
else if (framep &&
((op & 0xfc1f0000) == 0x901f0000 || /* st rx,NUM(r1) */
(op & 0xfc1f0000) == 0xd81f0000 || /* stfd Rx,NUM(r1) */
(op & 0xfc1f0000) == 0xfc1f0000))
{ /* frsp, fp?,NUM(r1) */
((op & 0xfc1f0000) == 0x901f0000 || /* st rx,NUM(r31) */
(op & 0xfc1f0000) == 0x981f0000 || /* stb Rx,NUM(r31) */
(op & 0xfc1f0000) == 0xd81f0000 || /* stfd Rx,NUM(r31) */
(op & 0xfc1f0000) == 0xfc1f0000)) /* frsp, fp?,NUM(r31) */
{
continue;
/* Set up frame pointer */