/* Target-dependent code for the ALPHA architecture, for GDB, the GNU Debugger.
Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
- 2003, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
+ 2003, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
This file is part of GDB.
#include "osabi.h"
#include "block.h"
#include "infcall.h"
+#include "trad-frame.h"
#include "elf-bfd.h"
alpha_register_type (struct gdbarch *gdbarch, int regno)
{
if (regno == ALPHA_SP_REGNUM || regno == ALPHA_GP_REGNUM)
- return builtin_type_void_data_ptr;
+ return builtin_type (gdbarch)->builtin_data_ptr;
if (regno == ALPHA_PC_REGNUM)
- return builtin_type_void_func_ptr;
+ return builtin_type (gdbarch)->builtin_func_ptr;
/* Don't need to worry about little vs big endian until
some jerk tries to port to alpha-unicosmk. */
}
static enum return_value_convention
-alpha_return_value (struct gdbarch *gdbarch, struct type *type,
- struct regcache *regcache, gdb_byte *readbuf,
- const gdb_byte *writebuf)
+alpha_return_value (struct gdbarch *gdbarch, struct type *func_type,
+ struct type *type, struct regcache *regcache,
+ gdb_byte *readbuf, const gdb_byte *writebuf)
{
enum type_code code = TYPE_CODE (type);
gdb_byte buf[ALPHA_INSN_SIZE];
int status;
- status = read_memory_nobpt (pc, buf, sizeof (buf));
+ status = target_read_memory (pc, buf, sizeof (buf));
if (status)
memory_error (status, pc);
return extract_unsigned_integer (buf, sizeof (buf));
};
static struct alpha_sigtramp_unwind_cache *
-alpha_sigtramp_frame_unwind_cache (struct frame_info *next_frame,
+alpha_sigtramp_frame_unwind_cache (struct frame_info *this_frame,
void **this_prologue_cache)
{
struct alpha_sigtramp_unwind_cache *info;
info = FRAME_OBSTACK_ZALLOC (struct alpha_sigtramp_unwind_cache);
*this_prologue_cache = info;
- tdep = gdbarch_tdep (get_frame_arch (next_frame));
- info->sigcontext_addr = tdep->sigcontext_addr (next_frame);
+ tdep = gdbarch_tdep (get_frame_arch (this_frame));
+ info->sigcontext_addr = tdep->sigcontext_addr (this_frame);
return info;
}
all arithmetic, it doesn't seem worthwhile to cache it. */
static CORE_ADDR
-alpha_sigtramp_register_address (CORE_ADDR sigcontext_addr, int regnum)
+alpha_sigtramp_register_address (struct gdbarch *gdbarch,
+ CORE_ADDR sigcontext_addr, int regnum)
{
- struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
if (regnum >= 0 && regnum < 32)
return sigcontext_addr + tdep->sc_regs_offset + regnum * 8;
frame. This will be used to create a new GDB frame struct. */
static void
-alpha_sigtramp_frame_this_id (struct frame_info *next_frame,
+alpha_sigtramp_frame_this_id (struct frame_info *this_frame,
void **this_prologue_cache,
struct frame_id *this_id)
{
+ struct gdbarch *gdbarch = get_frame_arch (this_frame);
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
struct alpha_sigtramp_unwind_cache *info
- = alpha_sigtramp_frame_unwind_cache (next_frame, this_prologue_cache);
- struct gdbarch_tdep *tdep;
+ = alpha_sigtramp_frame_unwind_cache (this_frame, this_prologue_cache);
CORE_ADDR stack_addr, code_addr;
/* If the OSABI couldn't locate the sigcontext, give up. */
/* If we have dynamic signal trampolines, find their start.
If we do not, then we must assume there is a symbol record
that can provide the start address. */
- tdep = gdbarch_tdep (get_frame_arch (next_frame));
if (tdep->dynamic_sigtramp_offset)
{
int offset;
- code_addr = frame_pc_unwind (next_frame);
+ code_addr = get_frame_pc (this_frame);
offset = tdep->dynamic_sigtramp_offset (code_addr);
if (offset >= 0)
code_addr -= offset;
code_addr = 0;
}
else
- code_addr = frame_func_unwind (next_frame, SIGTRAMP_FRAME);
+ code_addr = get_frame_func (this_frame);
/* The stack address is trivially read from the sigcontext. */
- stack_addr = alpha_sigtramp_register_address (info->sigcontext_addr,
+ stack_addr = alpha_sigtramp_register_address (gdbarch, info->sigcontext_addr,
ALPHA_SP_REGNUM);
- stack_addr = get_frame_memory_unsigned (next_frame, stack_addr,
+ stack_addr = get_frame_memory_unsigned (this_frame, stack_addr,
ALPHA_REGISTER_SIZE);
*this_id = frame_id_build (stack_addr, code_addr);
/* Retrieve the value of REGNUM in FRAME. Don't give up! */
-static void
-alpha_sigtramp_frame_prev_register (struct frame_info *next_frame,
- void **this_prologue_cache,
- int regnum, int *optimizedp,
- enum lval_type *lvalp, CORE_ADDR *addrp,
- int *realnump, gdb_byte *bufferp)
+static struct value *
+alpha_sigtramp_frame_prev_register (struct frame_info *this_frame,
+ void **this_prologue_cache, int regnum)
{
struct alpha_sigtramp_unwind_cache *info
- = alpha_sigtramp_frame_unwind_cache (next_frame, this_prologue_cache);
+ = alpha_sigtramp_frame_unwind_cache (this_frame, this_prologue_cache);
CORE_ADDR addr;
if (info->sigcontext_addr != 0)
{
/* All integer and fp registers are stored in memory. */
- addr = alpha_sigtramp_register_address (info->sigcontext_addr, regnum);
+ addr = alpha_sigtramp_register_address (get_frame_arch (this_frame),
+ info->sigcontext_addr, regnum);
if (addr != 0)
- {
- *optimizedp = 0;
- *lvalp = lval_memory;
- *addrp = addr;
- *realnump = -1;
- if (bufferp != NULL)
- get_frame_memory (next_frame, addr, bufferp, ALPHA_REGISTER_SIZE);
- return;
- }
+ return frame_unwind_got_memory (this_frame, regnum, addr);
}
/* This extra register may actually be in the sigcontext, but our
current description of it in alpha_sigtramp_frame_unwind_cache
doesn't include it. Too bad. Fall back on whatever's in the
outer frame. */
- *optimizedp = 0;
- *lvalp = lval_register;
- *addrp = 0;
- *realnump = regnum;
- if (bufferp)
- frame_unwind_register (next_frame, *realnump, bufferp);
+ return frame_unwind_got_register (this_frame, regnum, regnum);
}
-static const struct frame_unwind alpha_sigtramp_frame_unwind = {
- SIGTRAMP_FRAME,
- alpha_sigtramp_frame_this_id,
- alpha_sigtramp_frame_prev_register
-};
-
-static const struct frame_unwind *
-alpha_sigtramp_frame_sniffer (struct frame_info *next_frame)
+static int
+alpha_sigtramp_frame_sniffer (const struct frame_unwind *self,
+ struct frame_info *this_frame,
+ void **this_prologue_cache)
{
- struct gdbarch *gdbarch = get_frame_arch (next_frame);
- CORE_ADDR pc = frame_pc_unwind (next_frame);
+ struct gdbarch *gdbarch = get_frame_arch (this_frame);
+ CORE_ADDR pc = get_frame_pc (this_frame);
char *name;
/* NOTE: cagney/2004-04-30: Do not copy/clone this code. Instead
/* We shouldn't even bother to try if the OSABI didn't register a
sigcontext_addr handler or pc_in_sigtramp hander. */
if (gdbarch_tdep (gdbarch)->sigcontext_addr == NULL)
- return NULL;
+ return 0;
if (gdbarch_tdep (gdbarch)->pc_in_sigtramp == NULL)
- return NULL;
+ return 0;
/* Otherwise we should be in a signal frame. */
find_pc_partial_function (pc, &name, NULL, NULL);
if (gdbarch_tdep (gdbarch)->pc_in_sigtramp (pc, name))
- return &alpha_sigtramp_frame_unwind;
+ return 1;
- return NULL;
+ return 0;
}
-\f
-/* Fallback alpha frame unwinder. Uses instruction scanning and knows
- something about the traditional layout of alpha stack frames. */
-struct alpha_heuristic_unwind_cache
-{
- CORE_ADDR *saved_regs;
- CORE_ADDR vfp;
- CORE_ADDR start_pc;
- int return_reg;
+static const struct frame_unwind alpha_sigtramp_frame_unwind = {
+ SIGTRAMP_FRAME,
+ alpha_sigtramp_frame_this_id,
+ alpha_sigtramp_frame_prev_register,
+ NULL,
+ alpha_sigtramp_frame_sniffer
};
+\f
+
/* Heuristic_proc_start may hunt through the text section for a long
time across a 2400 baud serial line. Allows the user to limit this
search. */
function. But we're guessing anyway... */
static CORE_ADDR
-alpha_heuristic_proc_start (CORE_ADDR pc)
+alpha_heuristic_proc_start (struct gdbarch *gdbarch, CORE_ADDR pc)
{
- struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
CORE_ADDR last_non_nop = pc;
CORE_ADDR fence = pc - heuristic_fence_post;
CORE_ADDR orig_pc = pc;
CORE_ADDR func;
+ struct inferior *inf;
if (pc == 0)
return 0;
}
}
+ inf = current_inferior ();
+
/* It's not clear to me why we reach this point when stopping quietly,
but with this test, at least we don't print out warnings for every
child forked (eg, on decstation). 22apr93 rich@cygnus.com. */
- if (stop_soon == NO_STOP_QUIETLY)
+ if (inf->stop_soon == NO_STOP_QUIETLY)
{
static int blurb_printed = 0;
return 0;
}
+/* Fallback alpha frame unwinder. Uses instruction scanning and knows
+ something about the traditional layout of alpha stack frames. */
+
+struct alpha_heuristic_unwind_cache
+{
+ CORE_ADDR vfp;
+ CORE_ADDR start_pc;
+ struct trad_frame_saved_reg *saved_regs;
+ int return_reg;
+};
+
static struct alpha_heuristic_unwind_cache *
-alpha_heuristic_frame_unwind_cache (struct frame_info *next_frame,
+alpha_heuristic_frame_unwind_cache (struct frame_info *this_frame,
void **this_prologue_cache,
CORE_ADDR start_pc)
{
+ struct gdbarch *gdbarch = get_frame_arch (this_frame);
struct alpha_heuristic_unwind_cache *info;
ULONGEST val;
CORE_ADDR limit_pc, cur_pc;
info = FRAME_OBSTACK_ZALLOC (struct alpha_heuristic_unwind_cache);
*this_prologue_cache = info;
- info->saved_regs = frame_obstack_zalloc (SIZEOF_FRAME_SAVED_REGS);
+ info->saved_regs = trad_frame_alloc_saved_regs (this_frame);
- limit_pc = frame_pc_unwind (next_frame);
+ limit_pc = get_frame_pc (this_frame);
if (start_pc == 0)
- start_pc = alpha_heuristic_proc_start (limit_pc);
+ start_pc = alpha_heuristic_proc_start (gdbarch, limit_pc);
info->start_pc = start_pc;
frame_reg = ALPHA_SP_REGNUM;
All it says is that the function we are scanning reused
that register for some computation of its own, and is now
saving its result. */
- if (info->saved_regs[reg])
+ if (trad_frame_addr_p(info->saved_regs, reg))
continue;
if (reg == 31)
pointer or not. */
/* Hack: temporarily add one, so that the offset is non-zero
and we can tell which registers have save offsets below. */
- info->saved_regs[reg] = (word & 0xffff) + 1;
+ info->saved_regs[reg].addr = (word & 0xffff) + 1;
/* Starting with OSF/1-3.2C, the system libraries are shipped
without local symbols, but they still contain procedure
return_reg = ALPHA_RA_REGNUM;
info->return_reg = return_reg;
- val = frame_unwind_register_unsigned (next_frame, frame_reg);
+ val = get_frame_register_unsigned (this_frame, frame_reg);
info->vfp = val + frame_size;
/* Convert offsets to absolute addresses. See above about adding
one to the offsets to make all detected offsets non-zero. */
for (reg = 0; reg < ALPHA_NUM_REGS; ++reg)
- if (info->saved_regs[reg])
- info->saved_regs[reg] += val - 1;
+ if (trad_frame_addr_p(info->saved_regs, reg))
+ info->saved_regs[reg].addr += val - 1;
+
+ /* The stack pointer of the previous frame is computed by popping
+ the current stack frame. */
+ if (!trad_frame_addr_p (info->saved_regs, ALPHA_SP_REGNUM))
+ trad_frame_set_value (info->saved_regs, ALPHA_SP_REGNUM, info->vfp);
return info;
}
frame. This will be used to create a new GDB frame struct. */
static void
-alpha_heuristic_frame_this_id (struct frame_info *next_frame,
- void **this_prologue_cache,
- struct frame_id *this_id)
+alpha_heuristic_frame_this_id (struct frame_info *this_frame,
+ void **this_prologue_cache,
+ struct frame_id *this_id)
{
struct alpha_heuristic_unwind_cache *info
- = alpha_heuristic_frame_unwind_cache (next_frame, this_prologue_cache, 0);
+ = alpha_heuristic_frame_unwind_cache (this_frame, this_prologue_cache, 0);
*this_id = frame_id_build (info->vfp, info->start_pc);
}
/* Retrieve the value of REGNUM in FRAME. Don't give up! */
-static void
-alpha_heuristic_frame_prev_register (struct frame_info *next_frame,
- void **this_prologue_cache,
- int regnum, int *optimizedp,
- enum lval_type *lvalp, CORE_ADDR *addrp,
- int *realnump, gdb_byte *bufferp)
+static struct value *
+alpha_heuristic_frame_prev_register (struct frame_info *this_frame,
+ void **this_prologue_cache, int regnum)
{
struct alpha_heuristic_unwind_cache *info
- = alpha_heuristic_frame_unwind_cache (next_frame, this_prologue_cache, 0);
+ = alpha_heuristic_frame_unwind_cache (this_frame, this_prologue_cache, 0);
/* 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
if (regnum == ALPHA_PC_REGNUM)
regnum = info->return_reg;
- /* For all registers known to be saved in the current frame,
- do the obvious and pull the value out. */
- if (info->saved_regs[regnum])
- {
- *optimizedp = 0;
- *lvalp = lval_memory;
- *addrp = info->saved_regs[regnum];
- *realnump = -1;
- if (bufferp != NULL)
- get_frame_memory (next_frame, *addrp, bufferp, ALPHA_REGISTER_SIZE);
- return;
- }
-
- /* The stack pointer of the previous frame is computed by popping
- the current stack frame. */
- if (regnum == ALPHA_SP_REGNUM)
- {
- *optimizedp = 0;
- *lvalp = not_lval;
- *addrp = 0;
- *realnump = -1;
- if (bufferp != NULL)
- store_unsigned_integer (bufferp, ALPHA_REGISTER_SIZE, info->vfp);
- return;
- }
-
- /* Otherwise assume the next frame has the same register value. */
- *optimizedp = 0;
- *lvalp = lval_register;
- *addrp = 0;
- *realnump = regnum;
- if (bufferp)
- frame_unwind_register (next_frame, *realnump, bufferp);
+ return trad_frame_get_prev_register (this_frame, info->saved_regs, regnum);
}
static const struct frame_unwind alpha_heuristic_frame_unwind = {
NORMAL_FRAME,
alpha_heuristic_frame_this_id,
- alpha_heuristic_frame_prev_register
+ alpha_heuristic_frame_prev_register,
+ NULL,
+ default_frame_sniffer
};
-static const struct frame_unwind *
-alpha_heuristic_frame_sniffer (struct frame_info *next_frame)
-{
- return &alpha_heuristic_frame_unwind;
-}
-
static CORE_ADDR
-alpha_heuristic_frame_base_address (struct frame_info *next_frame,
+alpha_heuristic_frame_base_address (struct frame_info *this_frame,
void **this_prologue_cache)
{
struct alpha_heuristic_unwind_cache *info
- = alpha_heuristic_frame_unwind_cache (next_frame, this_prologue_cache, 0);
+ = alpha_heuristic_frame_unwind_cache (this_frame, this_prologue_cache, 0);
return info->vfp;
}
breakpoint. */
static struct frame_id
-alpha_unwind_dummy_id (struct gdbarch *gdbarch, struct frame_info *next_frame)
+alpha_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame)
{
ULONGEST base;
- base = frame_unwind_register_unsigned (next_frame, ALPHA_SP_REGNUM);
- return frame_id_build (base, frame_pc_unwind (next_frame));
+ base = get_frame_register_unsigned (this_frame, ALPHA_SP_REGNUM);
+ return frame_id_build (base, get_frame_pc (this_frame));
}
static CORE_ADDR
set_gdbarch_push_dummy_call (gdbarch, alpha_push_dummy_call);
/* Methods for saving / extracting a dummy frame's ID. */
- set_gdbarch_unwind_dummy_id (gdbarch, alpha_unwind_dummy_id);
+ set_gdbarch_dummy_id (gdbarch, alpha_dummy_id);
/* Return the unwound PC value. */
set_gdbarch_unwind_pc (gdbarch, alpha_unwind_pc);
if (tdep->jb_pc >= 0)
set_gdbarch_get_longjmp_target (gdbarch, alpha_get_longjmp_target);
- frame_unwind_append_sniffer (gdbarch, alpha_sigtramp_frame_sniffer);
- frame_unwind_append_sniffer (gdbarch, alpha_heuristic_frame_sniffer);
+ frame_unwind_append_unwinder (gdbarch, &alpha_sigtramp_frame_unwind);
+ frame_unwind_append_unwinder (gdbarch, &alpha_heuristic_frame_unwind);
frame_base_set_default (gdbarch, &alpha_heuristic_frame_base);
void
alpha_dwarf2_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
- frame_unwind_append_sniffer (gdbarch, dwarf2_frame_sniffer);
+ dwarf2_append_unwinders (gdbarch);
frame_base_append_sniffer (gdbarch, dwarf2_frame_base_sniffer);
}
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