Change gdbarch software_single_step frame_info to regcache

This patch changes gdbarch method software_single_step's parameter from
"struct frame_info *" to "struct regcache *, IOW, software_single_step
starts to use current regcache rather than current frame for software
single.

gdb:

2016-11-22  Yao Qi  <yao.qi@linaro.org>

	* gdbarch.sh (software_single_step): Change parameter from frame_info
	to regcache.
	* gdbarch.c, gdbarch.h: Regenerated.
	* aarch64-tdep.c (aarch64_software_single_step): Change parameter
	from frame_info to regcache.  Don't call get_current_regcache.
	* alpha-tdep.c (alpha_deal_with_atomic_sequence): Likewise.
	(alpha_software_single_step): Likewise.
	* alpha-tdep.h (alpha_software_single_step): Update declaration.
	* arm-linux-tdep.c (arm_linux_software_single_step): Likewise.
	* arm-tdep.c (arm_software_single_step): Likewise.
	* arm-tdep.h (arm_software_single_step): Likewise.
	* breakpoint.c (insert_single_step_breakpoint): Pass regcache to
	gdbarch_software_single_step.
	* cris-tdep.c (cris_software_single_step): Change parameter from
	frame_info to regcache.  Don't call get_current_regcache.
	* mips-tdep.c (mips_software_single_step): Likewise.
	* mips-tdep.h (mips_software_single_step): Update declaration.
	* moxie-tdep.c (moxie_software_single_step): Likewise.
	* nios2-tdep.c (nios2_software_single_step): Likewise.
	* ppc-tdep.h (ppc_deal_with_atomic_sequence): Update declaration.
	* rs6000-aix-tdep.c (rs6000_software_single_step): Likewise.
	* rs6000-tdep.c (ppc_deal_with_atomic_sequence): Likewise.
	* s390-linux-tdep.c (s390_software_single_step): Likewise.
	* sparc-tdep.c (sparc_software_single_step): Likewise.
	* spu-tdep.c (spu_software_single_step): Likewise.
	* tic6x-tdep.c (tic6x_software_single_step): Likewise.

23 files changed, 57 insertions, 42 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index d28552b..9749031 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,34 @@
 2016-11-22  Yao Qi  <yao.qi@linaro.org>
 
+	* gdbarch.sh (software_single_step): Change parameter from frame_info
+	to regcache.
+	* gdbarch.c, gdbarch.h: Regenerated.
+	* aarch64-tdep.c (aarch64_software_single_step): Change parameter
+	from frame_info to regcache.  Don't call get_current_regcache.
+	* alpha-tdep.c (alpha_deal_with_atomic_sequence): Likewise.
+	(alpha_software_single_step): Likewise.
+	* alpha-tdep.h (alpha_software_single_step): Update declaration.
+	* arm-linux-tdep.c (arm_linux_software_single_step): Likewise.
+	* arm-tdep.c (arm_software_single_step): Likewise.
+	* arm-tdep.h (arm_software_single_step): Likewise.
+	* breakpoint.c (insert_single_step_breakpoint): Pass regcache to
+	gdbarch_software_single_step.
+	* cris-tdep.c (cris_software_single_step): Change parameter from
+	frame_info to regcache.  Don't call get_current_regcache.
+	* mips-tdep.c (mips_software_single_step): Likewise.
+	* mips-tdep.h (mips_software_single_step): Update declaration.
+	* moxie-tdep.c (moxie_software_single_step): Likewise.
+	* nios2-tdep.c (nios2_software_single_step): Likewise.
+	* ppc-tdep.h (ppc_deal_with_atomic_sequence): Update declaration.
+	* rs6000-aix-tdep.c (rs6000_software_single_step): Likewise.
+	* rs6000-tdep.c (ppc_deal_with_atomic_sequence): Likewise.
+	* s390-linux-tdep.c (s390_software_single_step): Likewise.
+	* sparc-tdep.c (sparc_software_single_step): Likewise.
+	* spu-tdep.c (spu_software_single_step): Likewise.
+	* tic6x-tdep.c (tic6x_software_single_step): Likewise.
+
+2016-11-22  Yao Qi  <yao.qi@linaro.org>
+
 	* spu-tdep.c (spu_software_single_step): Call get_regcache_arch
 	instead of get_frame_arch.  Call regcache_read_pc instead of
 	get_frame_pc.  Call regcache_raw_get_unsigned instead of
diff --git a/gdb/aarch64-tdep.c b/gdb/aarch64-tdep.c
index 62ee3c5..6b95d7c 100644
--- a/gdb/aarch64-tdep.c
+++ b/gdb/aarch64-tdep.c
@@ -2225,9 +2225,8 @@ value_of_aarch64_user_reg (struct frame_info *frame, const void *baton)
    single step through atomic sequences on AArch64.  */
 
 static VEC (CORE_ADDR) *
-aarch64_software_single_step (struct frame_info *frame)
+aarch64_software_single_step (struct regcache *regcache)
 {
-  struct regcache *regcache = get_current_regcache ();
   struct gdbarch *gdbarch = get_regcache_arch (regcache);
   enum bfd_endian byte_order_for_code = gdbarch_byte_order_for_code (gdbarch);
   const int insn_size = 4;
diff --git a/gdb/alpha-tdep.c b/gdb/alpha-tdep.c
index 9753c1b..4442d22 100644
--- a/gdb/alpha-tdep.c
+++ b/gdb/alpha-tdep.c
@@ -766,9 +766,8 @@ static const int stq_c_opcode = 0x2f;
    the sequence.  */
 
 static VEC (CORE_ADDR) *
-alpha_deal_with_atomic_sequence (struct frame_info *frame)
+alpha_deal_with_atomic_sequence (struct regcache *regcache)
 {
-  struct regcache *regcache = get_current_regcache ();
   struct gdbarch *gdbarch = get_regcache_arch (regcache);
   CORE_ADDR pc = regcache_read_pc (regcache);
   CORE_ADDR breaks[2] = {-1, -1};
@@ -1719,9 +1718,8 @@ alpha_next_pc (struct regcache *regcache, CORE_ADDR pc)
 }
 
 VEC (CORE_ADDR) *
-alpha_software_single_step (struct frame_info *frame)
+alpha_software_single_step (struct regcache *regcache)
 {
-  struct regcache *regcache = get_current_regcache ();
   struct gdbarch *gdbarch = get_regcache_arch (regcache);
   CORE_ADDR pc;
   VEC (CORE_ADDR) *next_pcs = NULL;
diff --git a/gdb/alpha-tdep.h b/gdb/alpha-tdep.h
index 5b64861..c0f36b9 100644
--- a/gdb/alpha-tdep.h
+++ b/gdb/alpha-tdep.h
@@ -103,7 +103,7 @@ struct gdbarch_tdep
 };
 
 extern unsigned int alpha_read_insn (struct gdbarch *gdbarch, CORE_ADDR pc);
-extern VEC (CORE_ADDR) *alpha_software_single_step (struct frame_info *frame);
+extern VEC (CORE_ADDR) *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 *);
diff --git a/gdb/arm-linux-tdep.c b/gdb/arm-linux-tdep.c
index c621cd6..a30a235 100644
--- a/gdb/arm-linux-tdep.c
+++ b/gdb/arm-linux-tdep.c
@@ -922,9 +922,8 @@ arm_linux_get_next_pcs_syscall_next_pc (struct arm_get_next_pcs *self)
 /* Insert a single step breakpoint at the next executed instruction.  */
 
 static VEC (CORE_ADDR) *
-arm_linux_software_single_step (struct frame_info *frame)
+arm_linux_software_single_step (struct regcache *regcache)
 {
-  struct regcache *regcache = get_current_regcache ();
   struct gdbarch *gdbarch = get_regcache_arch (regcache);
   struct arm_get_next_pcs next_pcs_ctx;
   CORE_ADDR pc;
diff --git a/gdb/arm-tdep.c b/gdb/arm-tdep.c
index 78fc264..0b93df7 100644
--- a/gdb/arm-tdep.c
+++ b/gdb/arm-tdep.c
@@ -6287,9 +6287,8 @@ arm_get_next_pcs_is_thumb (struct arm_get_next_pcs *self)
    and breakpoint them.  */
 
 VEC (CORE_ADDR) *
-arm_software_single_step (struct frame_info *frame)
+arm_software_single_step (struct regcache *regcache)
 {
-  struct regcache *regcache = get_current_regcache ();
   struct gdbarch *gdbarch = get_regcache_arch (regcache);
   struct arm_get_next_pcs next_pcs_ctx;
   CORE_ADDR pc;
diff --git a/gdb/arm-tdep.h b/gdb/arm-tdep.h
index 10ab742..6af44a9f 100644
--- a/gdb/arm-tdep.h
+++ b/gdb/arm-tdep.h
@@ -259,7 +259,7 @@ CORE_ADDR arm_get_next_pcs_addr_bits_remove (struct arm_get_next_pcs *self,
 
 int arm_get_next_pcs_is_thumb (struct arm_get_next_pcs *self);
 
-VEC (CORE_ADDR) *arm_software_single_step (struct frame_info *);
+VEC (CORE_ADDR) *arm_software_single_step (struct regcache *);
 int arm_is_thumb (struct regcache *regcache);
 int arm_frame_is_thumb (struct frame_info *frame);
 
diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c
index d139747..67b610c 100644
--- a/gdb/breakpoint.c
+++ b/gdb/breakpoint.c
@@ -15193,15 +15193,16 @@ insert_single_step_breakpoint (struct gdbarch *gdbarch,
 int
 insert_single_step_breakpoints (struct gdbarch *gdbarch)
 {
-  struct frame_info *frame = get_current_frame ();
+  struct regcache *regcache = get_current_regcache ();
   VEC (CORE_ADDR) * next_pcs;
 
-  next_pcs = gdbarch_software_single_step (gdbarch, frame);
+  next_pcs = gdbarch_software_single_step (gdbarch, regcache);
 
   if (next_pcs != NULL)
     {
       int i;
       CORE_ADDR pc;
+      struct frame_info *frame = get_current_frame ();
       struct address_space *aspace = get_frame_address_space (frame);
 
       for (i = 0; VEC_iterate (CORE_ADDR, next_pcs, i, pc); i++)
diff --git a/gdb/cris-tdep.c b/gdb/cris-tdep.c
index 6b060ea..084ff49 100644
--- a/gdb/cris-tdep.c
+++ b/gdb/cris-tdep.c
@@ -2061,9 +2061,8 @@ find_step_target (struct regcache *regcache, inst_env_type *inst_env)
    Either one ordinary target or two targets for branches may be found.  */
 
 static VEC (CORE_ADDR) *
-cris_software_single_step (struct frame_info *frame)
+cris_software_single_step (struct regcache *regcache)
 {
-  struct regcache *regcache = get_current_regcache ();
   struct gdbarch *gdbarch = get_regcache_arch (regcache);
   inst_env_type inst_env;
   VEC (CORE_ADDR) *next_pcs = NULL;
diff --git a/gdb/gdbarch.c b/gdb/gdbarch.c
index 07b3ce5..20bcfd7 100644
--- a/gdb/gdbarch.c
+++ b/gdb/gdbarch.c
@@ -3164,13 +3164,13 @@ gdbarch_software_single_step_p (struct gdbarch *gdbarch)
 }
 
 VEC (CORE_ADDR) *
-gdbarch_software_single_step (struct gdbarch *gdbarch, struct frame_info *frame)
+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 (frame);
+  return gdbarch->software_single_step (regcache);
 }
 
 void
diff --git a/gdb/gdbarch.h b/gdb/gdbarch.h
index cc95914..3f3c002 100644
--- a/gdb/gdbarch.h
+++ b/gdb/gdbarch.h
@@ -688,8 +688,8 @@ extern void set_gdbarch_addr_bits_remove (struct gdbarch *gdbarch, gdbarch_addr_
 
 extern int gdbarch_software_single_step_p (struct gdbarch *gdbarch);
 
-typedef VEC (CORE_ADDR) * (gdbarch_software_single_step_ftype) (struct frame_info *frame);
-extern VEC (CORE_ADDR) * gdbarch_software_single_step (struct gdbarch *gdbarch, struct frame_info *frame);
+typedef VEC (CORE_ADDR) * (gdbarch_software_single_step_ftype) (struct regcache *regcache);
+extern VEC (CORE_ADDR) * 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);
 
 /* Return non-zero if the processor is executing a delay slot and a
diff --git a/gdb/gdbarch.sh b/gdb/gdbarch.sh
index 28a3478..ba57008 100755
--- a/gdb/gdbarch.sh
+++ b/gdb/gdbarch.sh
@@ -634,7 +634,7 @@ m:CORE_ADDR:addr_bits_remove:CORE_ADDR addr:addr::core_addr_identity::0
 # the condition and only put the breakpoint at the branch destination if
 # the condition is true, so that we ensure forward progress when stepping
 # past a conditional branch to self.
-F:VEC (CORE_ADDR) *:software_single_step:struct frame_info *frame:frame
+F:VEC (CORE_ADDR) *: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.
diff --git a/gdb/mips-tdep.c b/gdb/mips-tdep.c
index ba0d71d..cb4465b 100644
--- a/gdb/mips-tdep.c
+++ b/gdb/mips-tdep.c
@@ -4149,9 +4149,8 @@ deal_with_atomic_sequence (struct gdbarch *gdbarch, CORE_ADDR pc)
    the target of the coming instruction and breakpoint it.  */
 
 VEC (CORE_ADDR) *
-mips_software_single_step (struct frame_info *frame)
+mips_software_single_step (struct regcache *regcache)
 {
-  struct regcache *regcache = get_current_regcache ();
   struct gdbarch *gdbarch = get_regcache_arch (regcache);
   CORE_ADDR pc, next_pc;
   VEC (CORE_ADDR) *next_pcs;
diff --git a/gdb/mips-tdep.h b/gdb/mips-tdep.h
index 8a870aa..3b24394 100644
--- a/gdb/mips-tdep.h
+++ b/gdb/mips-tdep.h
@@ -154,7 +154,7 @@ enum
 };
 
 /* Single step based on where the current instruction will take us.  */
-extern VEC (CORE_ADDR) *mips_software_single_step (struct frame_info *frame);
+extern VEC (CORE_ADDR) *mips_software_single_step (struct regcache *regcache);
 
 /* Strip the ISA (compression) bit off from ADDR.  */
 extern CORE_ADDR mips_unmake_compact_addr (CORE_ADDR addr);
diff --git a/gdb/moxie-tdep.c b/gdb/moxie-tdep.c
index 90a6165..abf2868 100644
--- a/gdb/moxie-tdep.c
+++ b/gdb/moxie-tdep.c
@@ -300,9 +300,8 @@ moxie_process_readu (CORE_ADDR addr, gdb_byte *buf,
 /* Insert a single step breakpoint.  */
 
 static VEC (CORE_ADDR) *
-moxie_software_single_step (struct frame_info *frame)
+moxie_software_single_step (struct regcache *regcache)
 {
-  struct regcache *regcache = get_current_regcache ();
   struct gdbarch *gdbarch = get_regcache_arch (regcache);
   CORE_ADDR addr;
   gdb_byte buf[4];
diff --git a/gdb/nios2-tdep.c b/gdb/nios2-tdep.c
index f03c2df..8b78968 100644
--- a/gdb/nios2-tdep.c
+++ b/gdb/nios2-tdep.c
@@ -2220,9 +2220,8 @@ nios2_get_next_pc (struct regcache *regcache, CORE_ADDR pc)
 /* Implement the software_single_step gdbarch method.  */
 
 static VEC (CORE_ADDR) *
-nios2_software_single_step (struct frame_info *frame)
+nios2_software_single_step (struct regcache *regcache)
 {
-  struct regcache *regcache = get_current_regcache ();
   struct gdbarch *gdbarch = get_regcache_arch (regcache);
   CORE_ADDR next_pc = nios2_get_next_pc (regcache, regcache_read_pc (regcache));
   VEC (CORE_ADDR) *next_pcs = NULL;
diff --git a/gdb/ppc-tdep.h b/gdb/ppc-tdep.h
index 0249456..6f1fe89 100644
--- a/gdb/ppc-tdep.h
+++ b/gdb/ppc-tdep.h
@@ -76,7 +76,7 @@ int ppc_altivec_support_p (struct gdbarch *gdbarch);
 /* Return non-zero if the architecture described by GDBARCH has
    VSX registers (vsr0 --- vsr63).  */
 int vsx_support_p (struct gdbarch *gdbarch);
-VEC (CORE_ADDR) *ppc_deal_with_atomic_sequence (struct frame_info *frame);
+VEC (CORE_ADDR) *ppc_deal_with_atomic_sequence (struct regcache *regcache);
 
 
 /* Register set description.  */
diff --git a/gdb/rs6000-aix-tdep.c b/gdb/rs6000-aix-tdep.c
index 80038a1..2b90cb1 100644
--- a/gdb/rs6000-aix-tdep.c
+++ b/gdb/rs6000-aix-tdep.c
@@ -674,9 +674,8 @@ branch_dest (struct regcache *regcache, int opcode, int instr,
 /* AIX does not support PT_STEP.  Simulate it.  */
 
 static VEC (CORE_ADDR) *
-rs6000_software_single_step (struct frame_info *frame)
+rs6000_software_single_step (struct regcache *regcache)
 {
-  struct regcache *regcache = get_current_regcache ();
   struct gdbarch *gdbarch = get_regcache_arch (regcache);
   enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
   int ii, insn;
@@ -689,7 +688,7 @@ rs6000_software_single_step (struct frame_info *frame)
 
   insn = read_memory_integer (loc, 4, byte_order);
 
-  next_pcs = ppc_deal_with_atomic_sequence (frame);
+  next_pcs = ppc_deal_with_atomic_sequence (regcache);
   if (next_pcs != NULL)
     return next_pcs;
   
diff --git a/gdb/rs6000-tdep.c b/gdb/rs6000-tdep.c
index 629d4c2..1c26e1e 100644
--- a/gdb/rs6000-tdep.c
+++ b/gdb/rs6000-tdep.c
@@ -1144,9 +1144,8 @@ ppc_displaced_step_hw_singlestep (struct gdbarch *gdbarch,
    the sequence.  */
 
 VEC (CORE_ADDR) *
-ppc_deal_with_atomic_sequence (struct frame_info *frame)
+ppc_deal_with_atomic_sequence (struct regcache *regcache)
 {
-  struct regcache *regcache = get_current_regcache ();
   struct gdbarch *gdbarch = get_regcache_arch (regcache);
   enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
   CORE_ADDR pc = regcache_read_pc (regcache);
diff --git a/gdb/s390-linux-tdep.c b/gdb/s390-linux-tdep.c
index dc5c674..aabbbc2 100644
--- a/gdb/s390-linux-tdep.c
+++ b/gdb/s390-linux-tdep.c
@@ -723,9 +723,8 @@ s390_is_partial_instruction (struct gdbarch *gdbarch, CORE_ADDR loc, int *len)
    complexity.  */
 
 static VEC (CORE_ADDR) *
-s390_software_single_step (struct frame_info *frame)
+s390_software_single_step (struct regcache *regcache)
 {
-  struct regcache *regcache = get_current_regcache ();
   struct gdbarch *gdbarch = get_regcache_arch (regcache);
   CORE_ADDR loc = regcache_read_pc (regcache);
   enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
diff --git a/gdb/sparc-tdep.c b/gdb/sparc-tdep.c
index 18b627d..7532bc2 100644
--- a/gdb/sparc-tdep.c
+++ b/gdb/sparc-tdep.c
@@ -1603,9 +1603,8 @@ sparc_step_trap (struct frame_info *frame, unsigned long insn)
 }
 
 static VEC (CORE_ADDR) *
-sparc_software_single_step (struct frame_info *frame)
+sparc_software_single_step (struct regcache *regcache)
 {
-  struct regcache *regcache = get_current_regcache ();
   struct gdbarch *arch = get_regcache_arch (regcache);
   struct gdbarch_tdep *tdep = gdbarch_tdep (arch);
   CORE_ADDR npc, nnpc;
diff --git a/gdb/spu-tdep.c b/gdb/spu-tdep.c
index d16b68f..a7c2bf0 100644
--- a/gdb/spu-tdep.c
+++ b/gdb/spu-tdep.c
@@ -1611,9 +1611,8 @@ spu_memory_remove_breakpoint (struct gdbarch *gdbarch,
 /* Software single-stepping support.  */
 
 static VEC (CORE_ADDR) *
-spu_software_single_step (struct frame_info *frame)
+spu_software_single_step (struct regcache *regcache)
 {
-  struct regcache *regcache = get_current_regcache ();
   struct gdbarch *gdbarch = get_regcache_arch (regcache);
   enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
   CORE_ADDR pc, next_pc;
diff --git a/gdb/tic6x-tdep.c b/gdb/tic6x-tdep.c
index 145534a..de6bc6a 100644
--- a/gdb/tic6x-tdep.c
+++ b/gdb/tic6x-tdep.c
@@ -700,9 +700,8 @@ tic6x_get_next_pc (struct regcache *regcache, CORE_ADDR pc)
 /* This is the implementation of gdbarch method software_single_step.  */
 
 static VEC (CORE_ADDR) *
-tic6x_software_single_step (struct frame_info *frame)
+tic6x_software_single_step (struct regcache *regcache)
 {
-  struct regcache *regcache = get_current_regcache ();
   CORE_ADDR next_pc = tic6x_get_next_pc (regcache, regcache_read_pc (regcache));
   VEC (CORE_ADDR) *next_pcs = NULL;