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2005-05-27 Orjan Friberg <orjanf@axis.com>

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* cris-tdep.c (crisv32_scan_prologue): Add.
	(cris_frame_unwind_cache, cris_skip_prologue): Call
	crisv32_scan_prologue when debugging CRISv32.
This commit is contained in:
Orjan Friberg 2005-05-27 14:36:13 +00:00
parent fafb59f131
commit 5114e29d63
2 changed files with 55 additions and 2 deletions
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6
gdb/ChangeLog
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@ -1,3 +1,9 @@
2005-05-27 Orjan Friberg <orjanf@axis.com>
* cris-tdep.c (crisv32_scan_prologue): Add.
(cris_frame_unwind_cache, cris_skip_prologue): Call
crisv32_scan_prologue when debugging CRISv32.
2005-05-27 Orjan Friberg <orjanf@axis.com>
* cris-tdep.c (cris_sigtramp_start, cris_rt_sigtramp_start)

51
gdb/cris-tdep.c
View file

@ -724,6 +724,10 @@ static CORE_ADDR cris_scan_prologue (CORE_ADDR pc,
struct frame_info *next_frame,
struct cris_unwind_cache *info);
static CORE_ADDR crisv32_scan_prologue (CORE_ADDR pc,
struct frame_info *next_frame,
struct cris_unwind_cache *info);
static CORE_ADDR cris_unwind_pc (struct gdbarch *gdbarch,
struct frame_info *next_frame);
@ -795,7 +799,10 @@ cris_frame_unwind_cache (struct frame_info *next_frame,
info->leaf_function = 0;
/* Prologue analysis does the rest... */
cris_scan_prologue (frame_func_unwind (next_frame), next_frame, info);
if (cris_version () == 32)
crisv32_scan_prologue (frame_func_unwind (next_frame), next_frame, info);
else
cris_scan_prologue (frame_func_unwind (next_frame), next_frame, info);
return info;
}
@ -1375,6 +1382,42 @@ cris_scan_prologue (CORE_ADDR pc, struct frame_info *next_frame,
return pc;
}
static CORE_ADDR
crisv32_scan_prologue (CORE_ADDR pc, struct frame_info *next_frame,
struct cris_unwind_cache *info)
{
ULONGEST this_base;
/* Unlike the CRISv10 prologue scanner (cris_scan_prologue), this is not
meant to be a full-fledged prologue scanner. It is only needed for
the cases where we end up in code always lacking DWARF-2 CFI, notably:
* PLT stubs (library calls)
* call dummys
* signal trampolines
For those cases, it is assumed that there is no actual prologue; that
the stack pointer is not adjusted, and (as a consequence) the return
address is not pushed onto the stack. */
/* We only want to know the end of the prologue when next_frame and info
are NULL (called from cris_skip_prologue i.e.). */
if (next_frame == NULL && info == NULL)
{
return pc;
}
/* The SP is assumed to be unaltered. */
frame_unwind_unsigned_register (next_frame, SP_REGNUM, &this_base);
info->base = this_base;
info->prev_sp = this_base;
/* The PC is assumed to be found in SRP. */
info->saved_regs[PC_REGNUM] = info->saved_regs[SRP_REGNUM];
return pc;
}
/* Advance pc beyond any function entry prologue instructions at pc
to reach some "real" code. */
@ -1397,7 +1440,11 @@ cris_skip_prologue (CORE_ADDR pc)
return sal.end;
}
pc_after_prologue = cris_scan_prologue (pc, NULL, NULL);
if (cris_version () == 32)
pc_after_prologue = crisv32_scan_prologue (pc, NULL, NULL);
else
pc_after_prologue = cris_scan_prologue (pc, NULL, NULL);
return pc_after_prologue;
}