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* mdebugread.c (parse_procedure): Remove _sigtramp kludges for

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alpha and irix. The _sigtramp case has to be handled properly
	in the tdep files if we have no ecoff debugging info.
	* alpha-tdep.c (alpha_frame_saved_pc, alpha_frame_chain),
	mips-tdep.c (mips_frame_saved_pc):  Handle signal handler frames
	without PC_REGNUM kludge.
	* mdebugread.c (fixup_sigtramp), mips-tdep.c (read_next_frame_reg):
	Clean up handling of mips sigtramp frames, improve comments.
This commit is contained in:
Peter Schauer
1994-01-31 16:23:48 +00:00
parent ede7bc1c60
commit 0434c1a0c9
4 changed files with 54 additions and 30 deletions
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25
gdb/alpha-tdep.c
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@@ -1,5 +1,5 @@
/* Target-dependent code for the ALPHA architecture, for GDB, the GNU Debugger.
Copyright 1993 Free Software Foundation, Inc.
Copyright 1993, 1994 Free Software Foundation, Inc.
This file is part of GDB.
@@ -165,7 +165,10 @@ alpha_frame_saved_pc(frame)
FRAME frame;
{
alpha_extra_func_info_t proc_desc = frame->proc_desc;
int pcreg = proc_desc ? PROC_PC_REG(proc_desc) : RA_REGNUM;
/* We have to get the saved pc from the sigcontext
if it is a signal handler frame. */
int pcreg = frame->signal_handler_caller ? PC_REGNUM
: (proc_desc ? PROC_PC_REG(proc_desc) : RA_REGNUM);
if (proc_desc && PROC_DESC_IS_DUMMY(proc_desc))
return read_memory_integer(frame->frame - 8, 8);
@@ -428,17 +431,23 @@ alpha_frame_chain(frame)
we loop forever if we see a zero size frame. */
if (PROC_FRAME_REG (proc_desc) == SP_REGNUM
&& PROC_FRAME_OFFSET (proc_desc) == 0
/* The alpha __sigtramp routine is frameless and has a frame size
of zero. Luckily it is the only procedure which has PC_REGNUM
as PROC_PC_REG. */
&& PROC_PC_REG (proc_desc) != PC_REGNUM
/* The previous frame from a sigtramp frame might be frameless
and have frame size zero. */
&& !frame->signal_handler_caller)
return 0;
{
/* The alpha __sigtramp routine is frameless and has a frame size
of zero, but we are able to backtrace through it. */
char *name;
find_pc_partial_function (saved_pc, &name,
(CORE_ADDR *)NULL, (CORE_ADDR *)NULL);
if (IN_SIGTRAMP (saved_pc, name))
return frame->frame;
else
return 0;
}
else
return read_next_frame_reg(frame, PROC_FRAME_REG(proc_desc))
+ PROC_FRAME_OFFSET(proc_desc);
+ PROC_FRAME_OFFSET(proc_desc);
}
void