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* gdbarch.sh (software_single_step): Remove "insert_breakpoints_p" and

Browse Source 
"sig" arguments, add "regcache" argument.
	* gdbarch.c, gdbarch.h: Regenerate.

	* infrun.c (resume): Update SOFTWARE_SINGLE_STEP call arguments.
	(handle_inferior_event): Call remove_single_step_breakpoints directly
	instead of calling SOFTWARE_SINGLE_STEP to remove breakpoints.

	* alpha-tdep.c (alpha_software_single_step): Update argument list.
	Remove handling of !insert_breakpoints_p case.
	* arm-tdep.c (arm_software_single_step): Likewise.
	* cris-tdep.c (cris_software_single_step): Likewise.
	* mips-tdep.c (mips_software_single_step): Likewise.
	* rs6000-tdep.c (rs6000_software_single_step): Likewise.
	* sparc-tdep.c (sparc_software_single_step): Likewise.
	* spu-tdep.c (spu_software_single_step): Likewise.

	* alpha-tdep.h (alpha_software_single_step): Update prototype.
	* mips-tdep.h (mips_software_single_step): Likewise.
	* rs6000-tdep.h (rs6000_software_single_step): Likewise.
	* sparc-tdep.h (sparc_software_single_step): Likewise.
This commit is contained in:
Ulrich Weigand
2007-04-14 18:10:54 +00:00
parent 06a862851c
commit e0cd558aaa
16 changed files with 145 additions and 173 deletions
Download Patch File Download Diff File Expand all files Collapse all files

24
gdb/ChangeLog
View File

@ -1,3 +1,27 @@
2007-04-14 Ulrich Weigand <uweigand@de.ibm.com>
* gdbarch.sh (software_single_step): Remove "insert_breakpoints_p" and
"sig" arguments, add "regcache" argument.
* gdbarch.c, gdbarch.h: Regenerate.
* infrun.c (resume): Update SOFTWARE_SINGLE_STEP call arguments.
(handle_inferior_event): Call remove_single_step_breakpoints directly
instead of calling SOFTWARE_SINGLE_STEP to remove breakpoints.
* alpha-tdep.c (alpha_software_single_step): Update argument list.
Remove handling of !insert_breakpoints_p case.
* arm-tdep.c (arm_software_single_step): Likewise.
* cris-tdep.c (cris_software_single_step): Likewise.
* mips-tdep.c (mips_software_single_step): Likewise.
* rs6000-tdep.c (rs6000_software_single_step): Likewise.
* sparc-tdep.c (sparc_software_single_step): Likewise.
* spu-tdep.c (spu_software_single_step): Likewise.
* alpha-tdep.h (alpha_software_single_step): Update prototype.
* mips-tdep.h (mips_software_single_step): Likewise.
* rs6000-tdep.h (rs6000_software_single_step): Likewise.
* sparc-tdep.h (sparc_software_single_step): Likewise.
2007-04-14 Ulrich Weigand <uweigand@de.ibm.com>
* alpha-tdep.c (alpha_software_single_step): Do not call write_pc

17
gdb/alpha-tdep.c
View File

@ -1391,10 +1391,7 @@ fp_register_sign_bit (LONGEST reg)
/* alpha_software_single_step() is called just before we want to resume
the inferior, if we want to single-step it but there is no hardware
or kernel single-step support (NetBSD on Alpha, for example). We find
the target of the coming instruction and breakpoint it.
single_step is also called just after the inferior stops. If we had
set up a simulated single-step, we undo our damage. */
the target of the coming instruction and breakpoint it. */
static CORE_ADDR
alpha_next_pc (CORE_ADDR pc)
@ -1519,22 +1516,14 @@ alpha_next_pc (CORE_ADDR pc)
}
int
alpha_software_single_step (enum target_signal sig, int insert_breakpoints_p)
alpha_software_single_step (struct regcache *regcache)
{
CORE_ADDR next_pc;
CORE_ADDR pc;
CORE_ADDR pc, next_pc;
if (insert_breakpoints_p)
{
pc = read_pc ();
next_pc = alpha_next_pc (pc);
insert_single_step_breakpoint (next_pc);
}
else
{
remove_single_step_breakpoints ();
}
return 1;
}

2
gdb/alpha-tdep.h
View File

@ -107,7 +107,7 @@ struct gdbarch_tdep
};
extern unsigned int alpha_read_insn (CORE_ADDR pc);
extern int alpha_software_single_step (enum target_signal, int);
extern int alpha_software_single_step (struct regcache *regcache);
extern CORE_ADDR alpha_after_prologue (CORE_ADDR pc);
extern void alpha_mdebug_init_abi (struct gdbarch_info, struct gdbarch *);

13
gdb/arm-tdep.c
View File

@ -1902,26 +1902,17 @@ arm_get_next_pc (CORE_ADDR pc)
/* single_step() is called just before we want to resume the inferior,
if we want to single-step it but there is no hardware or kernel
single-step support. We find the target of the coming instruction
and breakpoint it.
single_step() is also called just after the inferior stops. If we
had set up a simulated single-step, we undo our damage. */
and breakpoint it. */
static int
arm_software_single_step (enum target_signal sig, int insert_bpt)
arm_software_single_step (struct regcache *regcache)
{
/* NOTE: This may insert the wrong breakpoint instruction when
single-stepping over a mode-changing instruction, if the
CPSR heuristics are used. */
if (insert_bpt)
{
CORE_ADDR next_pc = arm_get_next_pc (read_register (ARM_PC_REGNUM));
insert_single_step_breakpoint (next_pc);
}
else
remove_single_step_breakpoints ();
return 1;
}

7
gdb/cris-tdep.c
View File

@ -2120,12 +2120,10 @@ find_step_target (inst_env_type *inst_env)
Either one ordinary target or two targets for branches may be found. */
static int
cris_software_single_step (enum target_signal ignore, int insert_breakpoints)
cris_software_single_step (struct regcache *regcache)
{
inst_env_type inst_env;
if (insert_breakpoints)
{
/* Analyse the present instruction environment and insert
breakpoints. */
int status = find_step_target (&inst_env);
@ -2149,9 +2147,6 @@ cris_software_single_step (enum target_signal ignore, int insert_breakpoints)
insert_single_step_breakpoint (branch_target_address);
}
}
}
else
remove_single_step_breakpoints ();
return 1;
}

8
gdb/gdbarch.c
View File

@ -1522,8 +1522,8 @@ gdbarch_dump (struct gdbarch *current_gdbarch, struct ui_file *file)
#ifdef SOFTWARE_SINGLE_STEP
fprintf_unfiltered (file,
"gdbarch_dump: %s # %s\n",
"SOFTWARE_SINGLE_STEP(sig, insert_breakpoints_p)",
XSTRING (SOFTWARE_SINGLE_STEP (sig, insert_breakpoints_p)));
"SOFTWARE_SINGLE_STEP(regcache)",
XSTRING (SOFTWARE_SINGLE_STEP (regcache)));
#endif
fprintf_unfiltered (file,
"gdbarch_dump: software_single_step = <0x%lx>\n",
@ -3290,13 +3290,13 @@ gdbarch_software_single_step_p (struct gdbarch *gdbarch)
}
int
gdbarch_software_single_step (struct gdbarch *gdbarch, enum target_signal sig, int insert_breakpoints_p)
gdbarch_software_single_step (struct gdbarch *gdbarch, struct regcache *regcache)
{
gdb_assert (gdbarch != NULL);
gdb_assert (gdbarch->software_single_step != NULL);
if (gdbarch_debug >= 2)
fprintf_unfiltered (gdb_stdlog, "gdbarch_software_single_step called\n");
return gdbarch->software_single_step (sig, insert_breakpoints_p);
return gdbarch->software_single_step (regcache);
}
void

6
gdb/gdbarch.h
View File

@ -1173,14 +1173,14 @@ extern int gdbarch_software_single_step_p (struct gdbarch *gdbarch);
#define SOFTWARE_SINGLE_STEP_P() (gdbarch_software_single_step_p (current_gdbarch))
#endif
typedef int (gdbarch_software_single_step_ftype) (enum target_signal sig, int insert_breakpoints_p);
extern int gdbarch_software_single_step (struct gdbarch *gdbarch, enum target_signal sig, int insert_breakpoints_p);
typedef int (gdbarch_software_single_step_ftype) (struct regcache *regcache);
extern int gdbarch_software_single_step (struct gdbarch *gdbarch, struct regcache *regcache);
extern void set_gdbarch_software_single_step (struct gdbarch *gdbarch, gdbarch_software_single_step_ftype *software_single_step);
#if !defined (GDB_TM_FILE) && defined (SOFTWARE_SINGLE_STEP)
#error "Non multi-arch definition of SOFTWARE_SINGLE_STEP"
#endif
#if !defined (SOFTWARE_SINGLE_STEP)
#define SOFTWARE_SINGLE_STEP(sig, insert_breakpoints_p) (gdbarch_software_single_step (current_gdbarch, sig, insert_breakpoints_p))
#define SOFTWARE_SINGLE_STEP(regcache) (gdbarch_software_single_step (current_gdbarch, regcache))
#endif
/* Return non-zero if the processor is executing a delay slot and a

2
gdb/gdbarch.sh
View File

@ -628,7 +628,7 @@ f:=:CORE_ADDR:smash_text_address:CORE_ADDR addr:addr::core_addr_identity::0
#
# A return value of 1 means that the software_single_step breakpoints
# were inserted; 0 means they were not.
F:=:int:software_single_step:enum target_signal sig, int insert_breakpoints_p:sig, insert_breakpoints_p
F:=:int:software_single_step:struct regcache *regcache:regcache
# Return non-zero if the processor is executing a delay slot and a
# further single-step is needed before the instruction finishes.

8
gdb/infrun.c
View File

@ -548,7 +548,7 @@ resume (int step, enum target_signal sig)
if (SOFTWARE_SINGLE_STEP_P () && step)
{
/* Do it the hard way, w/temp breakpoints */
if (SOFTWARE_SINGLE_STEP (sig, 1 /*insert-breakpoints */ ))
if (SOFTWARE_SINGLE_STEP (current_regcache))
{
/* ...and don't ask hardware to do it. */
step = 0;
@ -1571,7 +1571,7 @@ handle_inferior_event (struct execution_control_state *ecs)
if (debug_infrun)
fprintf_unfiltered (gdb_stdlog, "infrun: stepping_past_singlestep_breakpoint\n");
/* Pull the single step breakpoints out of the target. */
(void) SOFTWARE_SINGLE_STEP (0, 0);
remove_single_step_breakpoints ();
singlestep_breakpoints_inserted_p = 0;
ecs->random_signal = 0;
@ -1680,7 +1680,7 @@ handle_inferior_event (struct execution_control_state *ecs)
if (SOFTWARE_SINGLE_STEP_P () && singlestep_breakpoints_inserted_p)
{
/* Pull the single step breakpoints out of the target. */
(void) SOFTWARE_SINGLE_STEP (0, 0);
remove_single_step_breakpoints ();
singlestep_breakpoints_inserted_p = 0;
}
@ -1751,7 +1751,7 @@ handle_inferior_event (struct execution_control_state *ecs)
if (SOFTWARE_SINGLE_STEP_P () && singlestep_breakpoints_inserted_p)
{
/* Pull the single step breakpoints out of the target. */
(void) SOFTWARE_SINGLE_STEP (0, 0);
remove_single_step_breakpoints ();
singlestep_breakpoints_inserted_p = 0;
}

13
gdb/mips-tdep.c
View File

@ -2199,26 +2199,17 @@ mips_addr_bits_remove (CORE_ADDR addr)
/* mips_software_single_step() is called just before we want to resume
the inferior, if we want to single-step it but there is no hardware
or kernel single-step support (MIPS on GNU/Linux for example). We find
the target of the coming instruction and breakpoint it.
single_step is also called just after the inferior stops. If we had
set up a simulated single-step, we undo our damage. */
the target of the coming instruction and breakpoint it. */
int
mips_software_single_step (enum target_signal sig, int insert_breakpoints_p)
mips_software_single_step (struct regcache *regcache)
{
CORE_ADDR pc, next_pc;
if (insert_breakpoints_p)
{
pc = read_register (mips_regnum (current_gdbarch)->pc);
next_pc = mips_next_pc (pc);
insert_single_step_breakpoint (next_pc);
}
else
remove_single_step_breakpoints ();
return 1;
}

2
gdb/mips-tdep.h
View File

@ -100,7 +100,7 @@ enum
};
/* Single step based on where the current instruction will take us. */
extern int mips_software_single_step (enum target_signal, int);
extern int mips_software_single_step (struct regcache *regcache);
/* Tell if the program counter value in MEMADDR is in a MIPS16
function. */

8
gdb/rs6000-tdep.c
View File

@ -723,8 +723,7 @@ rs6000_breakpoint_from_pc (CORE_ADDR *bp_addr, int *bp_size)
/* AIX does not support PT_STEP. Simulate it. */
int
rs6000_software_single_step (enum target_signal signal,
int insert_breakpoints_p)
rs6000_software_single_step (struct regcache *regcache)
{
CORE_ADDR dummy;
int breakp_sz;
@ -734,8 +733,6 @@ rs6000_software_single_step (enum target_signal signal,
CORE_ADDR breaks[2];
int opcode;
if (insert_breakpoints_p)
{
loc = read_pc ();
insn = read_memory_integer (loc, 4);
@ -755,9 +752,6 @@ rs6000_software_single_step (enum target_signal signal,
continue;
insert_single_step_breakpoint (breaks[ii]);
}
}
else
remove_single_step_breakpoints ();
errno = 0; /* FIXME, don't ignore errors! */
/* What errors? {read,write}_memory call error(). */

3
gdb/rs6000-tdep.h
View File

@ -21,8 +21,7 @@
#include "defs.h"
extern int rs6000_software_single_step (enum target_signal signal,
int insert_breakpoints_p);
extern int rs6000_software_single_step (struct regcache *regcache);
/* Hook in rs6000-tdep.c for determining the TOC address when
calling functions in the inferior. */

7
gdb/sparc-tdep.c
View File

@ -1330,14 +1330,12 @@ sparc_step_trap (unsigned long insn)
}
int
sparc_software_single_step (enum target_signal sig, int insert_breakpoints_p)
sparc_software_single_step (struct regcache *regcache)
{
struct gdbarch *arch = current_gdbarch;
struct gdbarch_tdep *tdep = gdbarch_tdep (arch);
CORE_ADDR npc, nnpc;
if (insert_breakpoints_p)
{
CORE_ADDR pc, orig_npc;
pc = sparc_address_from_register (tdep->pc_regnum);
@ -1356,9 +1354,6 @@ sparc_software_single_step (enum target_signal sig, int insert_breakpoints_p)
from here straight to NULL, i.e. a call or jump to 0. */
gdb_assert (npc != 0 || nnpc != 0 || orig_npc == 0);
gdb_assert (nnpc != npc || orig_npc == 0);
}
else
remove_single_step_breakpoints ();
return 1;
}

3
gdb/sparc-tdep.h
View File

@ -167,8 +167,7 @@ extern struct sparc_frame_cache *
extern int sparc_software_single_step (enum target_signal sig,
int insert_breakpoints_p);
extern int sparc_software_single_step (struct regcache *regcache);
extern void sparc_supply_rwindow (struct regcache *regcache,
CORE_ADDR sp, int regnum);

11
gdb/spu-tdep.c
View File

@ -1079,16 +1079,14 @@ spu_breakpoint_from_pc (CORE_ADDR * pcptr, int *lenptr)
/* Software single-stepping support. */
int
spu_software_single_step (enum target_signal signal, int insert_breakpoints_p)
spu_software_single_step (struct regcache *regcache)
{
if (insert_breakpoints_p)
{
CORE_ADDR pc, next_pc;
unsigned int insn;
int offset, reg;
gdb_byte buf[4];
regcache_cooked_read (current_regcache, SPU_PC_REGNUM, buf);
regcache_cooked_read (regcache, SPU_PC_REGNUM, buf);
/* Mask off interrupt enable bit. */
pc = extract_unsigned_integer (buf, 4) & -4;
@ -1114,7 +1112,7 @@ spu_software_single_step (enum target_signal signal, int insert_breakpoints_p)
target += pc;
else if (reg != -1)
{
regcache_cooked_read_part (current_regcache, reg, 0, 4, buf);
regcache_cooked_read_part (regcache, reg, 0, 4, buf);
target += extract_unsigned_integer (buf, 4) & -4;
}
@ -1122,9 +1120,6 @@ spu_software_single_step (enum target_signal signal, int insert_breakpoints_p)
if (target != next_pc)
insert_single_step_breakpoint (target);
}
}
else
remove_single_step_breakpoints ();
return 1;
}