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* mips-tdep.c (mips_insn16_frame_cache): Remove unused variables.

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Update comments. Also immediately return empty cache when the start
        address of our function could not be found.
        (mips_insn32_frame_cache): Likewise.
This commit is contained in:
Joel Brobecker
2004-10-11 02:04:23 +00:00
parent 1da212d6fb
commit c68a414253
2 changed files with 19 additions and 24 deletions
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7
gdb/ChangeLog
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@ -1,3 +1,10 @@
2004-10-10 Joel Brobecker <brobecker@gnat.com>
* mips-tdep.c (mips_insn16_frame_cache): Remove unused variables.
Update comments. Also immediately return empty cache when the start
address of our function could not be found.
(mips_insn32_frame_cache): Likewise.
2004-10-10 Joel Brobecker <brobecker@gnat.com> 2004-10-10 Joel Brobecker <brobecker@gnat.com>
* mips-tdep.c (mips16_decode_reg_save): Delete, no longer used. * mips-tdep.c (mips16_decode_reg_save): Delete, no longer used.

36
gdb/mips-tdep.c
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@ -1717,14 +1717,7 @@ mips_mdebug_frame_base_sniffer (struct frame_info *next_frame)
static struct mips_frame_cache * static struct mips_frame_cache *
mips_insn16_frame_cache (struct frame_info *next_frame, void **this_cache) mips_insn16_frame_cache (struct frame_info *next_frame, void **this_cache)
{ {
mips_extra_func_info_t proc_desc;
struct mips_frame_cache *cache; struct mips_frame_cache *cache;
struct gdbarch *gdbarch = get_frame_arch (next_frame);
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
/* r0 bit means kernel trap */
int kernel_trap;
/* What registers have been saved? Bitmasks. */
unsigned long gen_mask, float_mask;
if ((*this_cache) != NULL) if ((*this_cache) != NULL)
return (*this_cache); return (*this_cache);
@ -1732,7 +1725,7 @@ mips_insn16_frame_cache (struct frame_info *next_frame, void **this_cache)
(*this_cache) = cache; (*this_cache) = cache;
cache->saved_regs = trad_frame_alloc_saved_regs (next_frame); cache->saved_regs = trad_frame_alloc_saved_regs (next_frame);
/* Synthesize a proc descriptor. */ /* Analyze the function prologue. */
{ {
const CORE_ADDR pc = frame_pc_unwind (next_frame); const CORE_ADDR pc = frame_pc_unwind (next_frame);
CORE_ADDR start_addr; CORE_ADDR start_addr;
@ -1740,8 +1733,12 @@ mips_insn16_frame_cache (struct frame_info *next_frame, void **this_cache)
find_pc_partial_function (pc, NULL, &start_addr, NULL); find_pc_partial_function (pc, NULL, &start_addr, NULL);
if (start_addr == 0) if (start_addr == 0)
start_addr = heuristic_proc_start (pc); start_addr = heuristic_proc_start (pc);
/* We can't analyze the prologue if we couldn't find the begining
of the function. */
if (start_addr == 0)
return cache;
proc_desc = heuristic_proc_desc (start_addr, pc, next_frame, *this_cache); heuristic_proc_desc (start_addr, pc, next_frame, *this_cache);
} }
/* SP_REGNUM, contains the value and not the address. */ /* SP_REGNUM, contains the value and not the address. */
@ -1822,14 +1819,7 @@ mips_insn16_frame_base_sniffer (struct frame_info *next_frame)
static struct mips_frame_cache * static struct mips_frame_cache *
mips_insn32_frame_cache (struct frame_info *next_frame, void **this_cache) mips_insn32_frame_cache (struct frame_info *next_frame, void **this_cache)
{ {
mips_extra_func_info_t proc_desc;
struct mips_frame_cache *cache; struct mips_frame_cache *cache;
struct gdbarch *gdbarch = get_frame_arch (next_frame);
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
/* r0 bit means kernel trap */
int kernel_trap;
/* What registers have been saved? Bitmasks. */
unsigned long gen_mask, float_mask;
if ((*this_cache) != NULL) if ((*this_cache) != NULL)
return (*this_cache); return (*this_cache);
@ -1838,7 +1828,7 @@ mips_insn32_frame_cache (struct frame_info *next_frame, void **this_cache)
(*this_cache) = cache; (*this_cache) = cache;
cache->saved_regs = trad_frame_alloc_saved_regs (next_frame); cache->saved_regs = trad_frame_alloc_saved_regs (next_frame);
/* Synthesize a proc descriptor. */ /* Analyze the function prologue. */
{ {
const CORE_ADDR pc = frame_pc_unwind (next_frame); const CORE_ADDR pc = frame_pc_unwind (next_frame);
CORE_ADDR start_addr; CORE_ADDR start_addr;
@ -1846,16 +1836,14 @@ mips_insn32_frame_cache (struct frame_info *next_frame, void **this_cache)
find_pc_partial_function (pc, NULL, &start_addr, NULL); find_pc_partial_function (pc, NULL, &start_addr, NULL);
if (start_addr == 0) if (start_addr == 0)
start_addr = heuristic_proc_start (pc); start_addr = heuristic_proc_start (pc);
/* We can't analyze the prologue if we couldn't find the begining
of the function. */
if (start_addr == 0)
return cache;
proc_desc = heuristic_proc_desc (start_addr, pc, next_frame, *this_cache); heuristic_proc_desc (start_addr, pc, next_frame, *this_cache);
} }
if (proc_desc == NULL)
/* I'm not sure how/whether this can happen. Normally when we
can't find a proc_desc, we "synthesize" one using
heuristic_proc_desc and set the saved_regs right away. */
return cache;
/* SP_REGNUM, contains the value and not the address. */ /* SP_REGNUM, contains the value and not the address. */
trad_frame_set_value (cache->saved_regs, NUM_REGS + MIPS_SP_REGNUM, cache->base); trad_frame_set_value (cache->saved_regs, NUM_REGS + MIPS_SP_REGNUM, cache->base);