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[ARM] Remove field syscall_next_pc in struct gdbarch_tdep 

Field syscall_next_pc in struct gdbarch_tdep was to calculate the
next pc of syscall instruction.  On linux target, syscall_next_pc
is set to arm_linux_syscall_next_pc, to do linux specific things.
However, after we have struct arm_get_next_pcs_ops, we can do the
same thing in struct arm_get_next_pcs_ops field syscall_next_pc,
so syscall_next_pc in struct gdbarch_tdep is not needed any more.

gdb:

2016-01-14  Yao Qi  <yao.qi@linaro.org>

	* arm-linux-tdep.c (arm_linux_get_next_pcs_syscall_next_pc):
	Declare.
	(arm_linux_get_next_pcs_ops): Install
	arm_linux_get_next_pcs_syscall_next_pc.
	(arm_linux_syscall_next_pc): Change to ...
	(arm_linux_get_next_pcs_syscall_next_pc): ... it.
	(arm_linux_init_abi): Don't set tdep->syscall_next_pc.
	* arm-tdep.c (arm_get_next_pcs_syscall_next_pc): Declare.
	(arm_get_next_pcs_syscall_next_pc): Make it static.  Don't
	call tdep->syscall_next_pc.
	* arm-tdep.h (struct gdbarch_tdep) <syscall_next_pc>: Remove.
	(arm_get_next_pcs_syscall_next_pc): Remove.
This commit is contained in:
Yao Qi 2016-01-14 14:54:24 +00:00
parent c0518081f0
commit e7cf25a8ab
4 changed files with 36 additions and 29 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
gdb/ChangeLog
View File

@ -1,3 +1,18 @@
2016-01-14 Yao Qi <yao.qi@linaro.org>
* arm-linux-tdep.c (arm_linux_get_next_pcs_syscall_next_pc):
Declare.
(arm_linux_get_next_pcs_ops): Install
arm_linux_get_next_pcs_syscall_next_pc.
(arm_linux_syscall_next_pc): Change to ...
(arm_linux_get_next_pcs_syscall_next_pc): ... it.
(arm_linux_init_abi): Don't set tdep->syscall_next_pc.
* arm-tdep.c (arm_get_next_pcs_syscall_next_pc): Declare.
(arm_get_next_pcs_syscall_next_pc): Make it static. Don't
call tdep->syscall_next_pc.
* arm-tdep.h (struct gdbarch_tdep) <syscall_next_pc>: Remove.
(arm_get_next_pcs_syscall_next_pc): Remove.
2016-01-14 Yao Qi <yao.qi@linaro.org> 2016-01-14 Yao Qi <yao.qi@linaro.org>
* remote.c (remote_set_syscall_catchpoint): Cast to char *. * remote.c (remote_set_syscall_catchpoint): Cast to char *.

27
gdb/arm-linux-tdep.c
View File

@ -265,10 +265,14 @@ static const gdb_byte arm_linux_thumb2_le_breakpoint[] = { 0xf0, 0xf7, 0x00, 0xa
/* Syscall number for rt_sigreturn. */ /* Syscall number for rt_sigreturn. */
#define ARM_RT_SIGRETURN 173 #define ARM_RT_SIGRETURN 173
static CORE_ADDR
arm_linux_get_next_pcs_syscall_next_pc (struct arm_get_next_pcs *self,
CORE_ADDR pc);
/* Operation function pointers for get_next_pcs. */ /* Operation function pointers for get_next_pcs. */
static struct arm_get_next_pcs_ops arm_linux_get_next_pcs_ops = { static struct arm_get_next_pcs_ops arm_linux_get_next_pcs_ops = {
arm_get_next_pcs_read_memory_unsigned_integer, arm_get_next_pcs_read_memory_unsigned_integer,
arm_get_next_pcs_syscall_next_pc, arm_linux_get_next_pcs_syscall_next_pc,
arm_get_next_pcs_addr_bits_remove, arm_get_next_pcs_addr_bits_remove,
arm_get_next_pcs_is_thumb arm_get_next_pcs_is_thumb
}; };
@ -859,26 +863,23 @@ arm_linux_get_syscall_number (struct gdbarch *gdbarch,
return svc_number; return svc_number;
} }
/* When the processor is at a syscall instruction, return the PC of the
next instruction to be executed. */
static CORE_ADDR static CORE_ADDR
arm_linux_syscall_next_pc (struct regcache *regcache) arm_linux_get_next_pcs_syscall_next_pc (struct arm_get_next_pcs *self,
CORE_ADDR pc)
{ {
CORE_ADDR pc = regcache_read_pc (regcache);
CORE_ADDR next_pc = 0; CORE_ADDR next_pc = 0;
int is_thumb = arm_is_thumb (regcache); int is_thumb = arm_is_thumb (self->regcache);
ULONGEST svc_number = 0; ULONGEST svc_number = 0;
struct gdbarch *gdbarch = get_regcache_arch (regcache); struct gdbarch *gdbarch = get_regcache_arch (self->regcache);
if (is_thumb) if (is_thumb)
{ {
svc_number = regcache_raw_get_unsigned (regcache, 7); svc_number = regcache_raw_get_unsigned (self->regcache, 7);
next_pc = pc + 2; next_pc = pc + 2;
} }
else else
{ {
struct gdbarch *gdbarch = get_regcache_arch (regcache); struct gdbarch *gdbarch = get_regcache_arch (self->regcache);
enum bfd_endian byte_order_for_code = enum bfd_endian byte_order_for_code =
gdbarch_byte_order_for_code (gdbarch); gdbarch_byte_order_for_code (gdbarch);
unsigned long this_instr = unsigned long this_instr =
@ -891,14 +892,14 @@ arm_linux_syscall_next_pc (struct regcache *regcache)
} }
else /* EABI. */ else /* EABI. */
{ {
svc_number = regcache_raw_get_unsigned (regcache, 7); svc_number = regcache_raw_get_unsigned (self->regcache, 7);
} }
next_pc = pc + 4; next_pc = pc + 4;
} }
if (svc_number == ARM_SIGRETURN || svc_number == ARM_RT_SIGRETURN) if (svc_number == ARM_SIGRETURN || svc_number == ARM_RT_SIGRETURN)
next_pc = arm_linux_sigreturn_next_pc (regcache, svc_number); next_pc = arm_linux_sigreturn_next_pc (self->regcache, svc_number);
/* Addresses for calling Thumb functions have the bit 0 set. */ /* Addresses for calling Thumb functions have the bit 0 set. */
if (is_thumb) if (is_thumb)
@ -1485,8 +1486,6 @@ arm_linux_init_abi (struct gdbarch_info info,
set_gdbarch_stap_parse_special_token (gdbarch, set_gdbarch_stap_parse_special_token (gdbarch,
arm_stap_parse_special_token); arm_stap_parse_special_token);
tdep->syscall_next_pc = arm_linux_syscall_next_pc;
/* `catch syscall' */ /* `catch syscall' */
set_xml_syscall_file_name (gdbarch, "syscalls/arm-linux.xml"); set_xml_syscall_file_name (gdbarch, "syscalls/arm-linux.xml");
set_gdbarch_get_syscall_number (gdbarch, arm_linux_get_syscall_number); set_gdbarch_get_syscall_number (gdbarch, arm_linux_get_syscall_number);

16
gdb/arm-tdep.c
View File

@ -237,6 +237,11 @@ static void arm_neon_quad_write (struct gdbarch *gdbarch,
struct regcache *regcache, struct regcache *regcache,
int regnum, const gdb_byte *buf); int regnum, const gdb_byte *buf);
static CORE_ADDR
arm_get_next_pcs_syscall_next_pc (struct arm_get_next_pcs *self,
CORE_ADDR pc);
/* get_next_pcs operations. */ /* get_next_pcs operations. */
static struct arm_get_next_pcs_ops arm_get_next_pcs_ops = { static struct arm_get_next_pcs_ops arm_get_next_pcs_ops = {
arm_get_next_pcs_read_memory_unsigned_integer, arm_get_next_pcs_read_memory_unsigned_integer,
@ -6142,15 +6147,10 @@ arm_get_next_pcs_addr_bits_remove (struct arm_get_next_pcs *self,
/* Wrapper over syscall_next_pc for use in get_next_pcs. */ /* Wrapper over syscall_next_pc for use in get_next_pcs. */
CORE_ADDR static CORE_ADDR
arm_get_next_pcs_syscall_next_pc (struct arm_get_next_pcs *self, CORE_ADDR pc) arm_get_next_pcs_syscall_next_pc (struct arm_get_next_pcs *self,
CORE_ADDR pc)
{ {
struct gdbarch_tdep *tdep;
tdep = gdbarch_tdep (get_regcache_arch (self->regcache));
if (tdep->syscall_next_pc != NULL)
return tdep->syscall_next_pc (self->regcache);
return 0; return 0;
} }

7
gdb/arm-tdep.h
View File

@ -138,10 +138,6 @@ struct gdbarch_tdep
struct type *neon_double_type; struct type *neon_double_type;
struct type *neon_quad_type; struct type *neon_quad_type;
/* Return the expected next PC if the program is stopped at a syscall
instruction. */
CORE_ADDR (*syscall_next_pc) (struct regcache *regcache);
/* syscall record. */ /* syscall record. */
int (*arm_syscall_record) (struct regcache *regcache, unsigned long svc_number); int (*arm_syscall_record) (struct regcache *regcache, unsigned long svc_number);
}; };
@ -261,9 +257,6 @@ ULONGEST arm_get_next_pcs_read_memory_unsigned_integer (CORE_ADDR memaddr,
CORE_ADDR arm_get_next_pcs_addr_bits_remove (struct arm_get_next_pcs *self, CORE_ADDR arm_get_next_pcs_addr_bits_remove (struct arm_get_next_pcs *self,
CORE_ADDR val); CORE_ADDR val);
CORE_ADDR arm_get_next_pcs_syscall_next_pc (struct arm_get_next_pcs *self,
CORE_ADDR pc);
int arm_get_next_pcs_is_thumb (struct arm_get_next_pcs *self); int arm_get_next_pcs_is_thumb (struct arm_get_next_pcs *self);
void arm_insert_single_step_breakpoint (struct gdbarch *, void arm_insert_single_step_breakpoint (struct gdbarch *,