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* alpha-mdebug-tdep.c (alpha_mdebug_frame_p): Reject prologues.

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(alpha_mdebug_frame_unwind_cache): Don't call the heuristic unwinder.
        (alpha_mdebug_frame_this_id): Likewise.
        (alpha_mdebug_frame_prev_register): Likewise.
        (alpha_mdebug_frame_base_address): Likewise.
        (alpha_mdebug_frame_locals_address): Likewise.
        (alpha_mdebug_frame_args_address): Likewise.
        (struct alpha_mdebug_unwind_cache): Remove in_prologue_cache.
        * alpha-tdep.c (alpha_heuristic_proc_start): Use get_pc_function_start.
        (alpha_heuristic_frame_unwind_cache): Make static; add missing
        loop increment.
        (alpha_heuristic_frame_this_id): Make static.
        (alpha_heuristic_frame_prev_register): Likewise.
        (alpha_heuristic_frame_base_address): Likewise.
        * alpha-tdep.h: Update.
This commit is contained in:
Richard Henderson
2003-05-31 00:27:46 +00:00
parent 86f1d0fbb5
commit fbe586aede
4 changed files with 85 additions and 110 deletions
Download Patch File Download Diff File Expand all files Collapse all files

62
gdb/alpha-mdebug-tdep.c
View File

@@ -174,7 +174,6 @@ struct alpha_mdebug_unwind_cache
alpha_extra_func_info_t proc_desc;
CORE_ADDR vfp;
CORE_ADDR *saved_regs;
void *in_prologue_cache;
};
/* Extract all of the information about the frame from PROC_DESC
@@ -205,21 +204,6 @@ alpha_mdebug_frame_unwind_cache (struct frame_info *next_frame,
info->proc_desc = proc_desc;
gdb_assert (proc_desc != NULL);
/* If we're in the prologue, the PDR for this frame is not yet valid. */
/* ??? We could have said "no" in alpha_mdebug_frame_p, and we'd
walk down the list of unwinders and try the heuristic unwinder
and things would have been fine. However, since we have the PDR,
we know how to skip the search for the start of the procedure,
and all the uncertainty involved there. So instead, arrange for
us to defer to the heuristic unwinder directly. */
if (alpha_mdebug_in_prologue (pc, proc_desc))
{
alpha_heuristic_frame_unwind_cache (next_frame,
&info->in_prologue_cache,
PROC_LOW_ADDR (proc_desc));
return info;
}
info->saved_regs = frame_obstack_zalloc (SIZEOF_FRAME_SAVED_REGS);
/* The VFP of the frame is at FRAME_REG+FRAME_OFFSET. */
@@ -275,12 +259,7 @@ alpha_mdebug_frame_this_id (struct frame_info *next_frame,
struct alpha_mdebug_unwind_cache *info
= alpha_mdebug_frame_unwind_cache (next_frame, this_prologue_cache);
/* If we're in the prologue, defer to the heuristic unwinder. */
if (info->in_prologue_cache)
alpha_heuristic_frame_this_id (next_frame, &info->in_prologue_cache,
this_id);
else
*this_id = frame_id_build (info->vfp, frame_func_unwind (next_frame));
*this_id = frame_id_build (info->vfp, frame_func_unwind (next_frame));
}
/* Retrieve the value of REGNUM in FRAME. Don't give up! */
@@ -295,16 +274,6 @@ alpha_mdebug_frame_prev_register (struct frame_info *next_frame,
struct alpha_mdebug_unwind_cache *info
= alpha_mdebug_frame_unwind_cache (next_frame, this_prologue_cache);
/* If we're in the prologue, defer to the heuristic unwinder. */
if (info->in_prologue_cache)
{
alpha_heuristic_frame_prev_register (next_frame,
&info->in_prologue_cache,
regnum, optimizedp, lvalp,
addrp, realnump, bufferp);
return;
}
/* The PC of the previous frame is stored in the link register of
the current frame. Frob regnum so that we pull the value from
the correct place. */
@@ -359,6 +328,11 @@ alpha_mdebug_frame_p (CORE_ADDR pc)
if (proc_desc == NULL)
return NULL;
/* If we're in the prologue, the PDR for this frame is not yet valid.
Say no here and we'll fall back on the heuristic unwinder. */
if (alpha_mdebug_in_prologue (pc, proc_desc))
return NULL;
return &alpha_mdebug_frame_unwind;
}
@@ -369,11 +343,7 @@ alpha_mdebug_frame_base_address (struct frame_info *next_frame,
struct alpha_mdebug_unwind_cache *info
= alpha_mdebug_frame_unwind_cache (next_frame, this_prologue_cache);
if (info->in_prologue_cache)
return alpha_heuristic_frame_base_address (next_frame,
&info->in_prologue_cache);
else
return info->vfp;
return info->vfp;
}
static CORE_ADDR
@@ -382,15 +352,8 @@ alpha_mdebug_frame_locals_address (struct frame_info *next_frame,
{
struct alpha_mdebug_unwind_cache *info
= alpha_mdebug_frame_unwind_cache (next_frame, this_prologue_cache);
CORE_ADDR vfp;
if (info->in_prologue_cache)
vfp = alpha_heuristic_frame_base_address (next_frame,
&info->in_prologue_cache);
else
vfp = info->vfp;
return vfp - PROC_LOCALOFF (info->proc_desc);
return info->vfp - PROC_LOCALOFF (info->proc_desc);
}
static CORE_ADDR
@@ -399,15 +362,8 @@ alpha_mdebug_frame_args_address (struct frame_info *next_frame,
{
struct alpha_mdebug_unwind_cache *info
= alpha_mdebug_frame_unwind_cache (next_frame, this_prologue_cache);
CORE_ADDR vfp;
if (info->in_prologue_cache)
vfp = alpha_heuristic_frame_base_address (next_frame,
&info->in_prologue_cache);
else
vfp = info->vfp;
return vfp - ALPHA_NUM_ARG_REGS * 8;
return info->vfp - ALPHA_NUM_ARG_REGS * 8;
}
static const struct frame_base alpha_mdebug_frame_base = {