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2009-10-21 Maxim Grigoriev <maxim2405@gmail.com> 

* xtensa-tdep.c (XTENSA_ISA_BADPC): New.
	(xtensa_scan_prologue): Replace read_memory with target_read_memory.
	(call0_analyze_prologue): Use XTENSA_ISA_BADPC instead of "0".
	(call0_frame_cache): Check error conditions on call0_analyze_prologue.
This commit is contained in:
Maxim Grigoriev 2009-10-21 18:51:42 +00:00
parent 56ee5e00a8
commit d470961845
2 changed files with 18 additions and 3 deletions
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7
gdb/ChangeLog
View File

@ -1,3 +1,10 @@
2009-10-21 Maxim Grigoriev <maxim2405@gmail.com>
* xtensa-tdep.c (XTENSA_ISA_BADPC): New.
(xtensa_scan_prologue): Replace read_memory with target_read_memory.
(call0_analyze_prologue): Use XTENSA_ISA_BADPC instead of "0".
(call0_frame_cache): Check error conditions on call0_analyze_prologue.
2009-10-21 Paul Pluzhnikov <ppluzhnikov@google.com>
* defs.h (pc_prefix): New prototype.

14
gdb/xtensa-tdep.c
View File

@ -1046,7 +1046,8 @@ xtensa_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame)
/* Returns the best guess about which register is a frame pointer
for the function containing CURRENT_PC. */
#define XTENSA_ISA_BSZ 32 /* Instruction buffer size. */
#define XTENSA_ISA_BSZ 32 /* Instruction buffer size. */
#define XTENSA_ISA_BADPC ((CORE_ADDR)0) /* Bad PC value. */
static unsigned int
xtensa_scan_prologue (struct gdbarch *gdbarch, CORE_ADDR current_pc)
@ -1083,7 +1084,8 @@ xtensa_scan_prologue (struct gdbarch *gdbarch, CORE_ADDR current_pc)
ba = ia;
bt = (ba + XTENSA_ISA_BSZ) < current_pc
? ba + XTENSA_ISA_BSZ : current_pc;
read_memory (ba, ibuf, bt - ba);
if (target_read_memory (ba, ibuf, bt - ba) != 0)
RETURN_FP;
}
xtensa_insnbuf_from_chars (isa, ins, &ibuf[ia-ba], 0);
@ -2171,6 +2173,8 @@ call0_analyze_prologue (struct gdbarch *gdbarch,
ba = ia;
bt = (ba + XTENSA_ISA_BSZ) < body_pc ? ba + XTENSA_ISA_BSZ : body_pc;
read_memory (ba, ibuf, bt - ba);
/* If there is a memory reading error read_memory () will report it
and then throw an exception, stopping command execution. */
}
/* Decode format information. */
@ -2290,7 +2294,7 @@ done:
(unsigned)ia, fail ? "failed" : "succeeded");
xtensa_insnbuf_free(isa, slot);
xtensa_insnbuf_free(isa, ins);
return fail ? 0 : ia;
return fail ? XTENSA_ISA_BADPC : ia;
}
/* Initialize frame cache for the current frame in CALL0 ABI. */
@ -2315,6 +2319,10 @@ call0_frame_cache (struct frame_info *this_frame,
C0_NREGS,
&cache->c0.c0_rt[0],
&cache->call0);
if (body_pc == XTENSA_ISA_BADPC)
error (_("Xtensa-specific internal error: CALL0 prologue \
analysis failed in this frame. GDB command execution stopped."));
}
sp = get_frame_register_unsigned