* [PATCH 2/2] Remove argument pc in get_next_pcs
2016-01-15 9:57 [PATCH 0/2] Remove argument pc in get_next_pcs Yao Qi
@ 2016-01-15 9:57 ` Yao Qi
2016-01-15 9:57 ` [PATCH 1/2] [GDBserver] Use regcache_read_pc in install_software_single_step_breakpoints Yao Qi
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: Yao Qi @ 2016-01-15 9:57 UTC (permalink / raw)
To: gdb-patches
Nowadays, get_next_pcs in linux_target_ops has two parameters PC
and REGCACHE. Parameter PC looks redundant because it can be go
from REGCACHE. The patch is to remove PC from the arguments for
various functions.
gdb:
2016-01-15 Yao Qi <yao.qi@linaro.org>
* arch/arm-get-next-pcs.c (thumb_deal_with_atomic_sequence_raw):
Remove argument pc. Get pc by regcache_read_pc. Callers updated.
(arm_deal_with_atomic_sequence_raw): Likewise.
(thumb_get_next_pcs_raw): Likewise.
(arm_get_next_pcs_raw): Likewise.
(arm_get_next_pcs): Remove argument pc. Callers updated.
* arch/arm-get-next-pcs.h (arm_get_next_pcs): Update declaration.
gdb/gdbserver:
2016-01-15 Yao Qi <yao.qi@linaro.org>
* linux-arm-low.c (arm_gdbserver_get_next_pcs): Remove argument pc.
* linux-low.c (install_software_single_step_breakpoints): Don't
call regcache_read_pc.
* linux-low.h (struct linux_target_ops) <get_next_pcs>: Remove
argument pc.
---
gdb/arch/arm-get-next-pcs.c | 24 +++++++++++++-----------
gdb/arch/arm-get-next-pcs.h | 3 +--
gdb/arm-linux-tdep.c | 2 +-
gdb/arm-tdep.c | 2 +-
gdb/gdbserver/linux-arm-low.c | 4 ++--
gdb/gdbserver/linux-low.c | 4 +---
gdb/gdbserver/linux-low.h | 2 +-
7 files changed, 20 insertions(+), 21 deletions(-)
diff --git a/gdb/arch/arm-get-next-pcs.c b/gdb/arch/arm-get-next-pcs.c
index 6b8f38a..e840147 100644
--- a/gdb/arch/arm-get-next-pcs.c
+++ b/gdb/arch/arm-get-next-pcs.c
@@ -46,11 +46,11 @@ arm_get_next_pcs_ctor (struct arm_get_next_pcs *self,
added to the next_pcs list. */
static VEC (CORE_ADDR) *
-thumb_deal_with_atomic_sequence_raw (struct arm_get_next_pcs *self,
- CORE_ADDR pc)
+thumb_deal_with_atomic_sequence_raw (struct arm_get_next_pcs *self)
{
int byte_order_for_code = self->byte_order_for_code;
CORE_ADDR breaks[2] = {-1, -1};
+ CORE_ADDR pc = regcache_read_pc (self->regcache);
CORE_ADDR loc = pc;
unsigned short insn1, insn2;
int insn_count;
@@ -183,11 +183,11 @@ thumb_deal_with_atomic_sequence_raw (struct arm_get_next_pcs *self,
added to the next_pcs list. */
static VEC (CORE_ADDR) *
-arm_deal_with_atomic_sequence_raw (struct arm_get_next_pcs *self,
- CORE_ADDR pc)
+arm_deal_with_atomic_sequence_raw (struct arm_get_next_pcs *self)
{
int byte_order_for_code = self->byte_order_for_code;
CORE_ADDR breaks[2] = {-1, -1};
+ CORE_ADDR pc = regcache_read_pc (self->regcache);
CORE_ADDR loc = pc;
unsigned int insn;
int insn_count;
@@ -261,10 +261,11 @@ arm_deal_with_atomic_sequence_raw (struct arm_get_next_pcs *self,
/* Find the next possible PCs for thumb mode. */
static VEC (CORE_ADDR) *
-thumb_get_next_pcs_raw (struct arm_get_next_pcs *self, CORE_ADDR pc)
+thumb_get_next_pcs_raw (struct arm_get_next_pcs *self)
{
int byte_order = self->byte_order;
int byte_order_for_code = self->byte_order_for_code;
+ CORE_ADDR pc = regcache_read_pc (self->regcache);
unsigned long pc_val = ((unsigned long) pc) + 4; /* PC after prefetch */
unsigned short inst1;
CORE_ADDR nextpc = pc + 2; /* Default is next instruction. */
@@ -641,7 +642,7 @@ thumb_get_next_pcs_raw (struct arm_get_next_pcs *self, CORE_ADDR pc)
address in GDB and arm_addr_bits_remove in GDBServer. */
static VEC (CORE_ADDR) *
-arm_get_next_pcs_raw (struct arm_get_next_pcs *self, CORE_ADDR pc)
+arm_get_next_pcs_raw (struct arm_get_next_pcs *self)
{
int byte_order = self->byte_order;
int byte_order_for_code = self->byte_order_for_code;
@@ -650,6 +651,7 @@ arm_get_next_pcs_raw (struct arm_get_next_pcs *self, CORE_ADDR pc)
unsigned long status;
CORE_ADDR nextpc;
struct regcache *regcache = self->regcache;
+ CORE_ADDR pc = regcache_read_pc (self->regcache);
VEC (CORE_ADDR) *next_pcs = NULL;
pc_val = (unsigned long) pc;
@@ -904,21 +906,21 @@ arm_get_next_pcs_raw (struct arm_get_next_pcs *self, CORE_ADDR pc)
/* See arm-get-next-pcs.h. */
VEC (CORE_ADDR) *
-arm_get_next_pcs (struct arm_get_next_pcs *self, CORE_ADDR pc)
+arm_get_next_pcs (struct arm_get_next_pcs *self)
{
VEC (CORE_ADDR) *next_pcs = NULL;
if (self->ops->is_thumb (self))
{
- next_pcs = thumb_deal_with_atomic_sequence_raw (self, pc);
+ next_pcs = thumb_deal_with_atomic_sequence_raw (self);
if (next_pcs == NULL)
- next_pcs = thumb_get_next_pcs_raw (self, pc);
+ next_pcs = thumb_get_next_pcs_raw (self);
}
else
{
- next_pcs = arm_deal_with_atomic_sequence_raw (self, pc);
+ next_pcs = arm_deal_with_atomic_sequence_raw (self);
if (next_pcs == NULL)
- next_pcs = arm_get_next_pcs_raw (self, pc);
+ next_pcs = arm_get_next_pcs_raw (self);
}
return next_pcs;
diff --git a/gdb/arch/arm-get-next-pcs.h b/gdb/arch/arm-get-next-pcs.h
index 4a0fc16..7cb0858 100644
--- a/gdb/arch/arm-get-next-pcs.h
+++ b/gdb/arch/arm-get-next-pcs.h
@@ -57,7 +57,6 @@ void arm_get_next_pcs_ctor (struct arm_get_next_pcs *self,
struct regcache *regcache);
/* Find the next possible PCs after the current instruction executes. */
-VEC (CORE_ADDR) *arm_get_next_pcs (struct arm_get_next_pcs *self,
- CORE_ADDR pc);
+VEC (CORE_ADDR) *arm_get_next_pcs (struct arm_get_next_pcs *self);
#endif /* ARM_GET_NEXT_PCS_H */
diff --git a/gdb/arm-linux-tdep.c b/gdb/arm-linux-tdep.c
index 2306bda..7436270 100644
--- a/gdb/arm-linux-tdep.c
+++ b/gdb/arm-linux-tdep.c
@@ -935,7 +935,7 @@ arm_linux_software_single_step (struct frame_info *frame)
1,
regcache);
- next_pcs = arm_get_next_pcs (&next_pcs_ctx, regcache_read_pc (regcache));
+ next_pcs = arm_get_next_pcs (&next_pcs_ctx);
for (i = 0; VEC_iterate (CORE_ADDR, next_pcs, i, pc); i++)
{
diff --git a/gdb/arm-tdep.c b/gdb/arm-tdep.c
index ccc2a03..5a2d490 100644
--- a/gdb/arm-tdep.c
+++ b/gdb/arm-tdep.c
@@ -6186,7 +6186,7 @@ arm_software_single_step (struct frame_info *frame)
0,
regcache);
- next_pcs = arm_get_next_pcs (&next_pcs_ctx, regcache_read_pc (regcache));
+ next_pcs = arm_get_next_pcs (&next_pcs_ctx);
for (i = 0; VEC_iterate (CORE_ADDR, next_pcs, i, pc); i++)
arm_insert_single_step_breakpoint (gdbarch, aspace, pc);
diff --git a/gdb/gdbserver/linux-arm-low.c b/gdb/gdbserver/linux-arm-low.c
index 57cb855..5ec0341 100644
--- a/gdb/gdbserver/linux-arm-low.c
+++ b/gdb/gdbserver/linux-arm-low.c
@@ -913,7 +913,7 @@ arm_arch_setup (void)
/* Fetch the next possible PCs after the current instruction executes. */
static VEC (CORE_ADDR) *
-arm_gdbserver_get_next_pcs (CORE_ADDR pc, struct regcache *regcache)
+arm_gdbserver_get_next_pcs (struct regcache *regcache)
{
struct arm_get_next_pcs next_pcs_ctx;
VEC (CORE_ADDR) *next_pcs = NULL;
@@ -926,7 +926,7 @@ arm_gdbserver_get_next_pcs (CORE_ADDR pc, struct regcache *regcache)
1,
regcache);
- next_pcs = arm_get_next_pcs (&next_pcs_ctx, pc);
+ next_pcs = arm_get_next_pcs (&next_pcs_ctx);
return next_pcs;
}
diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c
index 9f194c7..d1632f3 100644
--- a/gdb/gdbserver/linux-low.c
+++ b/gdb/gdbserver/linux-low.c
@@ -4107,9 +4107,7 @@ install_software_single_step_breakpoints (struct lwp_info *lwp)
VEC (CORE_ADDR) *next_pcs = NULL;
struct cleanup *old_chain = make_cleanup (VEC_cleanup (CORE_ADDR), &next_pcs);
- pc = regcache_read_pc (regcache);
-
- next_pcs = (*the_low_target.get_next_pcs) (pc, regcache);
+ next_pcs = (*the_low_target.get_next_pcs) (regcache);
for (i = 0; VEC_iterate (CORE_ADDR, next_pcs, i, pc); ++i)
set_reinsert_breakpoint (pc);
diff --git a/gdb/gdbserver/linux-low.h b/gdb/gdbserver/linux-low.h
index 4845862..0d9eb40 100644
--- a/gdb/gdbserver/linux-low.h
+++ b/gdb/gdbserver/linux-low.h
@@ -154,7 +154,7 @@ struct linux_target_ops
const gdb_byte *(*sw_breakpoint_from_kind) (int kind, int *size);
/* Find the next possible PCs after the current instruction executes. */
- VEC (CORE_ADDR) *(*get_next_pcs) (CORE_ADDR pc, struct regcache *regcache);
+ VEC (CORE_ADDR) *(*get_next_pcs) (struct regcache *regcache);
int decr_pc_after_break;
int (*breakpoint_at) (CORE_ADDR pc);
--
1.9.1
^ permalink raw reply [flat|nested] 5+ messages in thread* [PATCH 1/2] [GDBserver] Use regcache_read_pc in install_software_single_step_breakpoints
2016-01-15 9:57 [PATCH 0/2] Remove argument pc in get_next_pcs Yao Qi
2016-01-15 9:57 ` [PATCH 2/2] " Yao Qi
@ 2016-01-15 9:57 ` Yao Qi
2016-01-15 13:14 ` [PATCH 0/2] Remove argument pc in get_next_pcs Antoine Tremblay
2016-01-26 14:09 ` Yao Qi
3 siblings, 0 replies; 5+ messages in thread
From: Yao Qi @ 2016-01-15 9:57 UTC (permalink / raw)
To: gdb-patches
In install_software_single_step_breakpoints, we've got the regcache
of current_thread, so we don't have to bother get_pc to get pc,
instead we can get pc from regcache directly. Note that the callers
of install_software_single_step_breakpoints have already switched
current_thread to LWP.
Since the pc is got from regcache_read_pc, in the next patch, we can
get pc inside the implementation of *the_low_target.get_next_pcs and
stop passing pc to *the_low_target.get_next_pcs.
gdb/gdbserver:
2016-01-15 Yao Qi <yao.qi@linaro.org>
* linux-low.c (install_software_single_step_breakpoints): Call
regcache_read_pc instead of get_pc.
---
gdb/gdbserver/linux-low.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c
index 6082d66..9f194c7 100644
--- a/gdb/gdbserver/linux-low.c
+++ b/gdb/gdbserver/linux-low.c
@@ -4107,7 +4107,8 @@ install_software_single_step_breakpoints (struct lwp_info *lwp)
VEC (CORE_ADDR) *next_pcs = NULL;
struct cleanup *old_chain = make_cleanup (VEC_cleanup (CORE_ADDR), &next_pcs);
- pc = get_pc (lwp);
+ pc = regcache_read_pc (regcache);
+
next_pcs = (*the_low_target.get_next_pcs) (pc, regcache);
for (i = 0; VEC_iterate (CORE_ADDR, next_pcs, i, pc); ++i)
--
1.9.1
^ permalink raw reply [flat|nested] 5+ messages in thread