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* gdbarch.sh (displaced_step_hw_singlestep): New callback.

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* gdbarch.c, gdbarch.h: Regenerate.
	* arch-utils.c (default_displaced_step_hw_singlestep): New function.
	* arch-utils.h (default_displaced_step_hw_singlestep): Add prototype.

	* ppc-linux-tdep.c (ppc_displaced_step_hw_singlestep): New function.
	(rs6000_gdbarch_init): Install it.

	* infrun.c (displaced_step_fixup): Use new callback to determine
	whether to "step" or "continue" displaced copy.
	(resume): Likewise.  Do not call maybe_software_singlestep
	for displaced stepping.
	(maybe_software_singlestep): Do not handle displaced stepping.
This commit is contained in:
Ulrich Weigand
2009-09-29 00:53:04 +00:00
parent 69368a60a4
commit 99e4058030
8 changed files with 103 additions and 16 deletions
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14
gdb/gdbarch.h
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@@ -734,6 +734,20 @@ typedef struct displaced_step_closure * (gdbarch_displaced_step_copy_insn_ftype)
extern struct displaced_step_closure * gdbarch_displaced_step_copy_insn (struct gdbarch *gdbarch, CORE_ADDR from, CORE_ADDR to, struct regcache *regs);
extern void set_gdbarch_displaced_step_copy_insn (struct gdbarch *gdbarch, gdbarch_displaced_step_copy_insn_ftype *displaced_step_copy_insn);
/* Return true if GDB should use hardware single-stepping to execute
the displaced instruction identified by CLOSURE. If false,
GDB will simply restart execution at the displaced instruction
location, and it is up to the target to ensure GDB will receive
control again (e.g. by placing a software breakpoint instruction
into the displaced instruction buffer).
The default implementation returns false on all targets that
provide a gdbarch_software_single_step routine, and true otherwise. */
typedef int (gdbarch_displaced_step_hw_singlestep_ftype) (struct gdbarch *gdbarch, struct displaced_step_closure *closure);
extern int gdbarch_displaced_step_hw_singlestep (struct gdbarch *gdbarch, struct displaced_step_closure *closure);
extern void set_gdbarch_displaced_step_hw_singlestep (struct gdbarch *gdbarch, gdbarch_displaced_step_hw_singlestep_ftype *displaced_step_hw_singlestep);
/* Fix up the state resulting from successfully single-stepping a
displaced instruction, to give the result we would have gotten from
stepping the instruction in its original location.