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2004-09-03 Andrew Cagney <cagney@gnu.org> 

* mips-tdep.c (mips_mdebug_frame_cache): Delete code handling
	non-kernel trap prologues.
This commit is contained in:
Andrew Cagney 2004-09-03 23:00:18 +00:00
parent 0d5febcc7c
commit 9733cfe12b
2 changed files with 8 additions and 46 deletions
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5
gdb/ChangeLog
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@ -1,12 +1,15 @@
2004-09-03 Andrew Cagney <cagney@gnu.org>
* mips-tdep.c (mips_mdebug_frame_cache): Delete code handling
non-kernel trap prologues.
* mips-tdep.c (find_proc_desc): Delete function.
(mips_mdebug_frame_cache): Inline call to find_proc_desc,
simplify.
(mips_insn16_frame_cache): Replace find_proc_desc with code from
mips_insn32_frame_cache.
* mips-tdep.c (find_proc_desc): Inline call to find_proc_desc.
* mips-tdep.c (after_prologue): Inline call to find_proc_desc.
Simplify as NEXT_FRAME is NULL.
(find_proc_desc): Simplify as NEXT_FRAME is non-NULL.

49
gdb/mips-tdep.c
View File

@ -1587,51 +1587,10 @@ mips_mdebug_frame_cache (struct frame_info *next_frame, void **this_cache)
gen_mask = kernel_trap ? 0xFFFFFFFF : PROC_REG_MASK (proc_desc);
float_mask = kernel_trap ? 0xFFFFFFFF : PROC_FREG_MASK (proc_desc);
/* In any frame other than the innermost or a frame interrupted by a
signal, we assume that all registers have been saved. This
assumes that all register saves in a function happen before the
first function call. */
if (in_prologue (frame_pc_unwind (next_frame), PROC_LOW_ADDR (proc_desc))
/* Not sure exactly what kernel_trap means, but if it means the
kernel saves the registers without a prologue doing it, we
better not examine the prologue to see whether registers
have been saved yet. */
&& !kernel_trap)
{
/* We need to figure out whether the registers that the
proc_desc claims are saved have been saved yet. */
CORE_ADDR addr;
/* Bitmasks; set if we have found a save for the register. */
unsigned long gen_save_found = 0;
unsigned long float_save_found = 0;
int mips16;
/* If the address is odd, assume this is MIPS16 code. */
addr = PROC_LOW_ADDR (proc_desc);
mips16 = pc_is_mips16 (addr);
/* Scan through this function's instructions preceding the
current PC, and look for those that save registers. */
while (addr < frame_pc_unwind (next_frame))
{
if (mips16)
{
mips16_decode_reg_save (mips16_fetch_instruction (addr),
&gen_save_found);
addr += MIPS16_INSTLEN;
}
else
{
mips32_decode_reg_save (mips32_fetch_instruction (addr),
&gen_save_found, &float_save_found);
addr += MIPS_INSTLEN;
}
}
gen_mask = gen_save_found;
float_mask = float_save_found;
}
/* Must be true. The in_prologue case is left for the heuristic
unwinder. This is always used on kernel traps. */
gdb_assert (!in_prologue (frame_pc_unwind (next_frame), PROC_LOW_ADDR (proc_desc))
|| kernel_trap);
/* Fill in the offsets for the registers which gen_mask says were
saved. */