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[AArch64] Implement gdbarch_gen_return_address gdbarch method

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This patch implements the 'collect $_ret' command to collect the return
address of a function in a tracepoint.  It marks the LR register for
collection.

gdb/ChangeLog:

	* aarch64-tdep.c: Add ax.h and ax-gdb.h includes.
	(aarch64_gen_return_address): New function.
	(aarch64_gdbarch_init): Hook it.
This commit is contained in:
Pierre Langlois
2015-07-09 16:35:11 +01:00
parent 02a2a705aa
commit ea873d8ea6
2 changed files with 22 additions and 0 deletions
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6
gdb/ChangeLog
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@ -1,3 +1,9 @@
2015-07-09 Pierre Langlois <pierre.langlois@arm.com>
* aarch64-tdep.c: Add ax.h and ax-gdb.h includes.
(aarch64_gen_return_address): New function.
(aarch64_gdbarch_init): Hook it.
2015-07-09 Pierre Langlois <pierre.langlois@arm.com> 2015-07-09 Pierre Langlois <pierre.langlois@arm.com>
* aarch64-tdep.c (aarch64_make_stub_cache): Set available_p and * aarch64-tdep.c (aarch64_make_stub_cache): Set available_p and

16
gdb/aarch64-tdep.c
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@ -42,6 +42,8 @@
#include "user-regs.h" #include "user-regs.h"
#include "language.h" #include "language.h"
#include "infcall.h" #include "infcall.h"
#include "ax.h"
#include "ax-gdb.h"
#include "aarch64-tdep.h" #include "aarch64-tdep.h"
@ -2273,6 +2275,18 @@ aarch64_get_longjmp_target (struct frame_info *frame, CORE_ADDR *pc)
*pc = extract_unsigned_integer (buf, X_REGISTER_SIZE, byte_order); *pc = extract_unsigned_integer (buf, X_REGISTER_SIZE, byte_order);
return 1; return 1;
} }
/* Implement the "gen_return_address" gdbarch method. */
static void
aarch64_gen_return_address (struct gdbarch *gdbarch,
struct agent_expr *ax, struct axs_value *value,
CORE_ADDR scope)
{
value->type = register_type (gdbarch, AARCH64_LR_REGNUM);
value->kind = axs_lvalue_register;
value->u.reg = AARCH64_LR_REGNUM;
}
/* Return the pseudo register name corresponding to register regnum. */ /* Return the pseudo register name corresponding to register regnum. */
@ -2842,6 +2856,8 @@ aarch64_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
if (tdep->jb_pc >= 0) if (tdep->jb_pc >= 0)
set_gdbarch_get_longjmp_target (gdbarch, aarch64_get_longjmp_target); set_gdbarch_get_longjmp_target (gdbarch, aarch64_get_longjmp_target);
set_gdbarch_gen_return_address (gdbarch, aarch64_gen_return_address);
tdesc_use_registers (gdbarch, tdesc, tdesc_data); tdesc_use_registers (gdbarch, tdesc, tdesc_data);
/* Add standard register aliases. */ /* Add standard register aliases. */