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* mips-tdep.c (mips32_scan_prologue): Add advance declaration.

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Remove sp as a parameter, compute it internally instead. Move
        prologue scanning limit from heuristic_proc_desc to here.
        (mips16_scan_prologue): Likewise.
        (mips_insn16_frame_cache): Replace call to heuristic_proc_desc
        by call to mips16_scan_prologue.
        (mips_insn32_frame_cache): Replace call to heuristic_proc_desc
        by call to mips32_scan_prologue.
        (heuristic_proc_desc): Remove code that's no longer necessary.
        Update calls to mips16_scan_prologue and mips32_scan_prologue.
        (mips_skip_prologue): Update calls to mips16_scan_prologue
        and mips32_scan_prologue.
This commit is contained in:
Joel Brobecker
2004-10-15 07:09:10 +00:00
parent c468c8bcab
commit a65bbe4404
2 changed files with 58 additions and 19 deletions
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15
gdb/ChangeLog
View File

@ -1,3 +1,18 @@
2004-10-14 Joel Brobecker <brobecker@gnat.com>
* mips-tdep.c (mips32_scan_prologue): Add advance declaration.
Remove sp as a parameter, compute it internally instead. Move
prologue scanning limit from heuristic_proc_desc to here.
(mips16_scan_prologue): Likewise.
(mips_insn16_frame_cache): Replace call to heuristic_proc_desc
by call to mips16_scan_prologue.
(mips_insn32_frame_cache): Replace call to heuristic_proc_desc
by call to mips32_scan_prologue.
(heuristic_proc_desc): Remove code that's no longer necessary.
Update calls to mips16_scan_prologue and mips32_scan_prologue.
(mips_skip_prologue): Update calls to mips16_scan_prologue
and mips32_scan_prologue.
2004-10-14 Joel Brobecker <brobecker@gnat.com> 2004-10-14 Joel Brobecker <brobecker@gnat.com>
* mips-tdep.c (mips16_scan_prologue): Merge code from * mips-tdep.c (mips16_scan_prologue): Merge code from

62
gdb/mips-tdep.c
View File

@ -442,6 +442,17 @@ static struct type *mips_double_register_type (void);
static struct cmd_list_element *setmipscmdlist = NULL; static struct cmd_list_element *setmipscmdlist = NULL;
static struct cmd_list_element *showmipscmdlist = NULL; static struct cmd_list_element *showmipscmdlist = NULL;
/* FIXME: brobecker/2004-10-15: I suspect these two declarations can
be removed by a better ordering of the functions below. But I want
to do that as a separate change later in order to separate real
changes and changes that just move some code around. */
static CORE_ADDR mips32_scan_prologue (CORE_ADDR start_pc, CORE_ADDR limit_pc,
struct frame_info *next_frame,
struct mips_frame_cache *this_cache);
static CORE_ADDR mips16_scan_prologue (CORE_ADDR start_pc, CORE_ADDR limit_pc,
struct frame_info *next_frame,
struct mips_frame_cache *this_cache);
/* Integer registers 0 thru 31 are handled explicitly by /* Integer registers 0 thru 31 are handled explicitly by
mips_register_name(). Processor specific registers 32 and above mips_register_name(). Processor specific registers 32 and above
are listed in the followign tables. */ are listed in the followign tables. */
@ -1738,7 +1749,7 @@ mips_insn16_frame_cache (struct frame_info *next_frame, void **this_cache)
if (start_addr == 0) if (start_addr == 0)
return cache; return cache;
heuristic_proc_desc (start_addr, pc, next_frame, *this_cache); mips16_scan_prologue (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. */
@ -1841,7 +1852,7 @@ mips_insn32_frame_cache (struct frame_info *next_frame, void **this_cache)
if (start_addr == 0) if (start_addr == 0)
return cache; return cache;
heuristic_proc_desc (start_addr, pc, next_frame, *this_cache); mips32_scan_prologue (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. */
@ -2258,12 +2269,13 @@ mips16_get_imm (unsigned short prev_inst, /* previous instruction */
Return the address of the first instruction past the prologue. */ Return the address of the first instruction past the prologue. */
static CORE_ADDR static CORE_ADDR
mips16_scan_prologue (CORE_ADDR start_pc, CORE_ADDR limit_pc, CORE_ADDR sp, mips16_scan_prologue (CORE_ADDR start_pc, CORE_ADDR limit_pc,
struct frame_info *next_frame, struct frame_info *next_frame,
struct mips_frame_cache *this_cache) struct mips_frame_cache *this_cache)
{ {
CORE_ADDR cur_pc; CORE_ADDR cur_pc;
CORE_ADDR frame_addr = 0; /* Value of $r17, used as frame pointer */ CORE_ADDR frame_addr = 0; /* Value of $r17, used as frame pointer */
CORE_ADDR sp;
long frame_offset = 0; /* Size of stack frame. */ long frame_offset = 0; /* Size of stack frame. */
long frame_adjust = 0; /* Offset of FP from SP. */ long frame_adjust = 0; /* Offset of FP from SP. */
int frame_reg = MIPS_SP_REGNUM; int frame_reg = MIPS_SP_REGNUM;
@ -2276,6 +2288,16 @@ mips16_scan_prologue (CORE_ADDR start_pc, CORE_ADDR limit_pc, CORE_ADDR sp,
int prev_extend_bytes; int prev_extend_bytes;
CORE_ADDR end_prologue_addr = 0; CORE_ADDR end_prologue_addr = 0;
/* Can be called when there's no process, and hence when there's no
NEXT_FRAME. */
if (next_frame != NULL)
sp = read_next_frame_reg (next_frame, NUM_REGS + MIPS_SP_REGNUM);
else
sp = 0;
if (limit_pc > start_pc + 200)
limit_pc = start_pc + 200;
for (cur_pc = start_pc; cur_pc < limit_pc; cur_pc += MIPS16_INSTLEN) for (cur_pc = start_pc; cur_pc < limit_pc; cur_pc += MIPS16_INSTLEN)
{ {
/* Save the previous instruction. If it's an EXTEND, we'll extract /* Save the previous instruction. If it's an EXTEND, we'll extract
@ -2464,12 +2486,13 @@ reset_saved_regs (struct mips_frame_cache *this_cache)
Return the address of the first instruction past the prologue. */ Return the address of the first instruction past the prologue. */
static CORE_ADDR static CORE_ADDR
mips32_scan_prologue (CORE_ADDR start_pc, CORE_ADDR limit_pc, CORE_ADDR sp, mips32_scan_prologue (CORE_ADDR start_pc, CORE_ADDR limit_pc,
struct frame_info *next_frame, struct frame_info *next_frame,
struct mips_frame_cache *this_cache) struct mips_frame_cache *this_cache)
{ {
CORE_ADDR cur_pc; CORE_ADDR cur_pc;
CORE_ADDR frame_addr = 0; /* Value of $r30. Used by gcc for frame-pointer */ CORE_ADDR frame_addr = 0; /* Value of $r30. Used by gcc for frame-pointer */
CORE_ADDR sp;
long frame_offset; long frame_offset;
int frame_reg = MIPS_SP_REGNUM; int frame_reg = MIPS_SP_REGNUM;
@ -2477,6 +2500,16 @@ mips32_scan_prologue (CORE_ADDR start_pc, CORE_ADDR limit_pc, CORE_ADDR sp,
int seen_sp_adjust = 0; int seen_sp_adjust = 0;
int load_immediate_bytes = 0; int load_immediate_bytes = 0;
/* Can be called when there's no process, and hence when there's no
NEXT_FRAME. */
if (next_frame != NULL)
sp = read_next_frame_reg (next_frame, NUM_REGS + MIPS_SP_REGNUM);
else
sp = 0;
if (limit_pc > start_pc + 200)
limit_pc = start_pc + 200;
restart: restart:
frame_offset = 0; frame_offset = 0;
@ -2650,28 +2683,19 @@ heuristic_proc_desc (CORE_ADDR start_pc, CORE_ADDR limit_pc,
struct frame_info *next_frame, struct frame_info *next_frame,
struct mips_frame_cache *this_cache) struct mips_frame_cache *this_cache)
{ {
CORE_ADDR sp;
/* Can be called when there's no process, and hence when there's no
NEXT_FRAME. */
if (next_frame != NULL)
sp = read_next_frame_reg (next_frame, NUM_REGS + MIPS_SP_REGNUM);
else
sp = 0;
if (start_pc == 0) if (start_pc == 0)
return NULL; return NULL;
memset (&temp_proc_desc, '\0', sizeof (temp_proc_desc)); memset (&temp_proc_desc, '\0', sizeof (temp_proc_desc));
PROC_LOW_ADDR (&temp_proc_desc) = start_pc; PROC_LOW_ADDR (&temp_proc_desc) = start_pc;
PROC_FRAME_REG (&temp_proc_desc) = MIPS_SP_REGNUM; PROC_FRAME_REG (&temp_proc_desc) = MIPS_SP_REGNUM;
PROC_PC_REG (&temp_proc_desc) = RA_REGNUM; PROC_PC_REG (&temp_proc_desc) = RA_REGNUM;
if (start_pc + 200 < limit_pc)
limit_pc = start_pc + 200;
if (pc_is_mips16 (start_pc)) if (pc_is_mips16 (start_pc))
mips16_scan_prologue (start_pc, limit_pc, sp, next_frame, this_cache); mips16_scan_prologue (start_pc, limit_pc, next_frame, this_cache);
else else
mips32_scan_prologue (start_pc, limit_pc, sp, next_frame, this_cache); mips32_scan_prologue (start_pc, limit_pc, next_frame, this_cache);
return &temp_proc_desc; return &temp_proc_desc;
} }
@ -4995,9 +5019,9 @@ mips_skip_prologue (CORE_ADDR pc)
limit_pc = pc + 100; /* Magic. */ limit_pc = pc + 100; /* Magic. */
if (pc_is_mips16 (pc)) if (pc_is_mips16 (pc))
return mips16_scan_prologue (pc, limit_pc, 0, NULL, NULL); return mips16_scan_prologue (pc, limit_pc, NULL, NULL);
else else
return mips32_scan_prologue (pc, limit_pc, 0, NULL, NULL); return mips32_scan_prologue (pc, limit_pc, NULL, NULL);
} }
/* Root of all "set mips "/"show mips " commands. This will eventually be /* Root of all "set mips "/"show mips " commands. This will eventually be