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[AArch64] Refactor aarch64_make_prologue_cache

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We would previously have to make sure the frame cache was not already
created before calling aarch64_make_prologue_cache.  This patch makes
this function check it so that the caller does not need to do so.

gdb/ChangeLog:

	* aarch64-tdep.c (aarch64_make_prologue_cache): Update comment.
	New argument this_cache.  Return early if this_cache is already
	set.  Set this_cache.
	(aarch64_prologue_this_id): Update call to
	aarch64_make_prologue_cache.
	(aarch64_prologue_prev_register): Likewise.
	(aarch64_normal_frame_base): Likewise.
This commit is contained in:
Pierre Langlois 2015-07-09 16:35:10 +01:00
parent 3350cc01de
commit 7c8edfae86
2 changed files with 25 additions and 18 deletions
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10
gdb/ChangeLog
View File

@ -1,3 +1,13 @@
2015-07-09 Pierre Langlois <pierre.langlois@arm.com>
* aarch64-tdep.c (aarch64_make_prologue_cache): Update comment.
New argument this_cache. Return early if this_cache is already
set. Set this_cache.
(aarch64_prologue_this_id): Update call to
aarch64_make_prologue_cache.
(aarch64_prologue_prev_register): Likewise.
(aarch64_normal_frame_base): Likewise.
2015-07-09 Simon Marchi <simon.marchi@ericsson.com>
* c-valprint.c (c_val_print): Factor out memberptr printing code

33
gdb/aarch64-tdep.c
View File

@ -930,18 +930,24 @@ aarch64_scan_prologue (struct frame_info *this_frame,
}
}
/* Allocate an aarch64_prologue_cache and fill it with information
about the prologue of *THIS_FRAME. */
/* Allocate and fill in *THIS_CACHE with information about the prologue of
*THIS_FRAME. Do not do this is if *THIS_CACHE was already allocated.
Return a pointer to the current aarch64_prologue_cache in
*THIS_CACHE. */
static struct aarch64_prologue_cache *
aarch64_make_prologue_cache (struct frame_info *this_frame)
aarch64_make_prologue_cache (struct frame_info *this_frame, void **this_cache)
{
struct aarch64_prologue_cache *cache;
CORE_ADDR unwound_fp;
int reg;
if (*this_cache != NULL)
return *this_cache;
cache = FRAME_OBSTACK_ZALLOC (struct aarch64_prologue_cache);
cache->saved_regs = trad_frame_alloc_saved_regs (this_frame);
*this_cache = cache;
aarch64_scan_prologue (this_frame, cache);
@ -970,14 +976,11 @@ static void
aarch64_prologue_this_id (struct frame_info *this_frame,
void **this_cache, struct frame_id *this_id)
{
struct aarch64_prologue_cache *cache;
struct aarch64_prologue_cache *cache
= aarch64_make_prologue_cache (this_frame, this_cache);
struct frame_id id;
CORE_ADDR pc, func;
if (*this_cache == NULL)
*this_cache = aarch64_make_prologue_cache (this_frame);
cache = *this_cache;
/* This is meant to halt the backtrace at "_start". */
pc = get_frame_pc (this_frame);
if (pc <= gdbarch_tdep (get_frame_arch (this_frame))->lowest_pc)
@ -999,11 +1002,8 @@ aarch64_prologue_prev_register (struct frame_info *this_frame,
void **this_cache, int prev_regnum)
{
struct gdbarch *gdbarch = get_frame_arch (this_frame);
struct aarch64_prologue_cache *cache;
if (*this_cache == NULL)
*this_cache = aarch64_make_prologue_cache (this_frame);
cache = *this_cache;
struct aarch64_prologue_cache *cache
= aarch64_make_prologue_cache (this_frame, this_cache);
/* If we are asked to unwind the PC, then we need to return the LR
instead. The prologue may save PC, but it will point into this
@ -1120,11 +1120,8 @@ struct frame_unwind aarch64_stub_unwind =
static CORE_ADDR
aarch64_normal_frame_base (struct frame_info *this_frame, void **this_cache)
{
struct aarch64_prologue_cache *cache;
if (*this_cache == NULL)
*this_cache = aarch64_make_prologue_cache (this_frame);
cache = *this_cache;
struct aarch64_prologue_cache *cache
= aarch64_make_prologue_cache (this_frame, this_cache);
return cache->prev_sp - cache->framesize;
}