OpenE2K/binutils-gdb
12
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

* rs6000-tdep.c (frame_initial_stack_address): Use

Browse Source 
frame_register_read to read the alloca_reg.
This commit is contained in:
Andrew Cagney 2002-04-17 23:28:38 +00:00
parent ffa554edd7
commit 953836b25a
2 changed files with 21 additions and 35 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
gdb/ChangeLog
View File

@ -1,3 +1,8 @@
2002-04-17 Andrew Cagney <ac131313@redhat.com>
* rs6000-tdep.c (frame_initial_stack_address): Use
frame_register_read to read the alloca_reg.
2002-04-17 Andrew Cagney <ac131313@redhat.com>
* frame.c (find_saved_register): Find saved registers in the next

51
gdb/rs6000-tdep.c
View File

@ -1488,41 +1488,22 @@ frame_initial_stack_address (struct frame_info *fi)
return fi->extra_info->initial_sp;
}
/* This function has an alloca register. If this is the top-most frame
(with the lowest address), the value in alloca register is good. */
if (!fi->next)
return fi->extra_info->initial_sp = read_register (fdata.alloca_reg);
/* Otherwise, this is a caller frame. Callee has usually already saved
registers, but there are exceptions (such as when the callee
has no parameters). Find the address in which caller's alloca
register is saved. */
for (callee_fi = fi->next; callee_fi; callee_fi = callee_fi->next)
{
if (!callee_fi->saved_regs)
frame_get_saved_regs (callee_fi, NULL);
/* this is the address in which alloca register is saved. */
tmpaddr = callee_fi->saved_regs[fdata.alloca_reg];
if (tmpaddr)
{
fi->extra_info->initial_sp =
read_memory_addr (tmpaddr, TDEP->wordsize);
return fi->extra_info->initial_sp;
}
/* Go look into deeper levels of the frame chain to see if any one of
the callees has saved alloca register. */
}
/* If alloca register was not saved, by the callee (or any of its callees)
then the value in the register is still good. */
fi->extra_info->initial_sp = read_register (fdata.alloca_reg);
/* There is an alloca register, use its value, in the current frame,
as the initial stack pointer. */
{
char *tmpbuf = alloca (MAX_REGISTER_RAW_SIZE);
if (frame_register_read (fi, fdata.alloca_reg, tmpbuf))
{
fi->extra_info->initial_sp
= extract_unsigned_integer (tmpbuf,
REGISTER_RAW_SIZE (fdata.alloca_reg));
}
else
/* NOTE: cagney/2002-04-17: At present the only time
frame_register_read will fail is when the register isn't
available. If that does happen, use the frame. */
fi->extra_info->initial_sp = fi->frame;
}
return fi->extra_info->initial_sp;
}