#include "arch-utils.h"
#include "osabi.h"
#include "block.h"
+#include "infcall.h"
#include "elf-bfd.h"
#include "alpha-tdep.h"
\f
+/* Return the name of the REGNO register.
+
+ An empty name corresponds to a register number that used to
+ be used for a virtual register. That virtual register has
+ been removed, but the index is still reserved to maintain
+ compatibility with existing remote alpha targets. */
+
static const char *
alpha_register_name (int regno)
{
static int
alpha_cannot_fetch_register (int regno)
{
- return regno == ALPHA_ZERO_REGNUM;
+ return (regno == ALPHA_ZERO_REGNUM
+ || strlen (alpha_register_name (regno)) == 0);
}
static int
alpha_cannot_store_register (int regno)
{
- return regno == ALPHA_ZERO_REGNUM;
+ return (regno == ALPHA_ZERO_REGNUM
+ || strlen (alpha_register_name (regno)) == 0);
}
static struct type *
return (regno * 8);
}
-static int
-alpha_register_raw_size (int regno)
-{
- return 8;
-}
-
-static int
-alpha_register_virtual_size (int regno)
-{
- return 8;
-}
-
/* The following represents exactly the conversion performed by
the LDS instruction. This applies to both single-precision
floating point and 32-bit integers. */
/* Similarly, this represents exactly the conversion performed by
the STS instruction. */
-static inline void
+static void
alpha_sts (void *out, const void *in)
{
ULONGEST reg, mem;
registers is different. */
static int
-alpha_convert_register_p (int regno)
+alpha_convert_register_p (int regno, struct type *type)
{
return (regno >= ALPHA_FP0_REGNUM && regno < ALPHA_FP0_REGNUM + 31);
}
static void
-alpha_register_to_value (int regnum, struct type *valtype, char *in, char *out)
+alpha_register_to_value (struct frame_info *frame, int regnum,
+ struct type *valtype, void *out)
{
+ char in[MAX_REGISTER_SIZE];
+ frame_register_read (frame, regnum, in);
switch (TYPE_LENGTH (valtype))
{
case 4:
memcpy (out, in, 8);
break;
default:
- error ("Cannot retrieve value from floating point register");
+ error (_("Cannot retrieve value from floating point register"));
}
}
static void
-alpha_value_to_register (struct type *valtype, int regnum, char *in, char *out)
+alpha_value_to_register (struct frame_info *frame, int regnum,
+ struct type *valtype, const void *in)
{
+ char out[MAX_REGISTER_SIZE];
switch (TYPE_LENGTH (valtype))
{
case 4:
memcpy (out, in, 8);
break;
default:
- error ("Cannot store value in floating point register");
+ error (_("Cannot store value in floating point register"));
}
+ put_frame_register (frame, regnum, out);
}
\f
structure to be returned is passed as a hidden first argument. */
static CORE_ADDR
-alpha_push_dummy_call (struct gdbarch *gdbarch, CORE_ADDR func_addr,
+alpha_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
struct regcache *regcache, CORE_ADDR bp_addr,
int nargs, struct value **args, CORE_ADDR sp,
int struct_return, CORE_ADDR struct_addr)
};
struct alpha_arg *alpha_args
= (struct alpha_arg *) alloca (nargs * sizeof (struct alpha_arg));
- register struct alpha_arg *m_arg;
+ struct alpha_arg *m_arg;
char arg_reg_buffer[ALPHA_REGISTER_SIZE * ALPHA_NUM_ARG_REGS];
int required_arg_regs;
+ CORE_ADDR func_addr = find_function_addr (function, NULL);
/* The ABI places the address of the called function in T12. */
regcache_cooked_write_signed (regcache, ALPHA_T12_REGNUM, func_addr);
for (i = 0, m_arg = alpha_args; i < nargs; i++, m_arg++)
{
struct value *arg = args[i];
- struct type *arg_type = check_typedef (VALUE_TYPE (arg));
+ struct type *arg_type = check_typedef (value_type (arg));
/* Cast argument to long if necessary as the compiler does it too. */
switch (TYPE_CODE (arg_type))
break;
default:
- internal_error (__FILE__, __LINE__, "unknown floating point width");
+ internal_error (__FILE__, __LINE__, _("unknown floating point width"));
}
break;
break;
default:
- internal_error (__FILE__, __LINE__, "unknown floating point width");
+ internal_error (__FILE__, __LINE__, _("unknown floating point width"));
}
break;
/* FIXME: 128-bit long doubles are returned like structures:
by writing into indirect storage provided by the caller
as the first argument. */
- error ("Cannot set a 128-bit long double return value.");
+ error (_("Cannot set a 128-bit long double return value."));
default:
- internal_error (__FILE__, __LINE__, "unknown floating point width");
+ internal_error (__FILE__, __LINE__, _("unknown floating point width"));
}
break;
/* FIXME: 128-bit long doubles are returned like structures:
by writing into indirect storage provided by the caller
as the first argument. */
- error ("Cannot set a 128-bit long double return value.");
+ error (_("Cannot set a 128-bit long double return value."));
default:
- internal_error (__FILE__, __LINE__, "unknown floating point width");
+ internal_error (__FILE__, __LINE__, _("unknown floating point width"));
}
break;
}
}
-static int
-alpha_use_struct_convention (int gcc_p, struct type *type)
-{
- /* Structures are returned by ref in extra arg0. */
- return 1;
-}
-
\f
static const unsigned char *
alpha_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenptr)
char buf[4];
int status;
- status = read_memory_nobpt (pc, buf, 4);
+ status = deprecated_read_memory_nobpt (pc, buf, 4);
if (status)
memory_error (status, pc);
return extract_unsigned_integer (buf, 4);
return info;
}
-/* Return the address of REGNO in a sigtramp frame. Since this is all
- arithmetic, it doesn't seem worthwhile to cache it. */
-
-#ifndef SIGFRAME_PC_OFF
-#define SIGFRAME_PC_OFF (2 * 8)
-#define SIGFRAME_REGSAVE_OFF (4 * 8)
-#define SIGFRAME_FPREGSAVE_OFF (SIGFRAME_REGSAVE_OFF + 32 * 8 + 8)
-#endif
+/* Return the address of REGNUM in a sigtramp frame. Since this is
+ all arithmetic, it doesn't seem worthwhile to cache it. */
static CORE_ADDR
-alpha_sigtramp_register_address (CORE_ADDR sigcontext_addr, unsigned int regno)
+alpha_sigtramp_register_address (CORE_ADDR sigcontext_addr, int regnum)
{
- if (regno < 32)
- return sigcontext_addr + SIGFRAME_REGSAVE_OFF + regno * 8;
- if (regno >= ALPHA_FP0_REGNUM && regno < ALPHA_FP0_REGNUM + 32)
- return sigcontext_addr + SIGFRAME_FPREGSAVE_OFF + regno * 8;
- if (regno == ALPHA_PC_REGNUM)
- return sigcontext_addr + SIGFRAME_PC_OFF;
+ struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
+
+ if (regnum >= 0 && regnum < 32)
+ return sigcontext_addr + tdep->sc_regs_offset + regnum * 8;
+ else if (regnum >= ALPHA_FP0_REGNUM && regnum < ALPHA_FP0_REGNUM + 32)
+ return sigcontext_addr + tdep->sc_fpregs_offset + regnum * 8;
+ else if (regnum == ALPHA_PC_REGNUM)
+ return sigcontext_addr + tdep->sc_pc_offset;
return 0;
}
};
static const struct frame_unwind *
-alpha_sigtramp_frame_p (CORE_ADDR pc)
+alpha_sigtramp_frame_sniffer (struct frame_info *next_frame)
{
+ CORE_ADDR pc = frame_pc_unwind (next_frame);
char *name;
- /* We shouldn't even bother to try if the OSABI didn't register
- a sigcontext_addr handler. */
- if (!gdbarch_tdep (current_gdbarch)->sigcontext_addr)
+ /* NOTE: cagney/2004-04-30: Do not copy/clone this code. Instead
+ look at tramp-frame.h and other simplier per-architecture
+ sigtramp unwinders. */
+
+ /* 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 (current_gdbarch)->sigcontext_addr == NULL)
+ return NULL;
+ if (gdbarch_tdep (current_gdbarch)->pc_in_sigtramp == NULL)
return NULL;
/* Otherwise we should be in a signal frame. */
find_pc_partial_function (pc, &name, NULL, NULL);
- if (PC_IN_SIGTRAMP (pc, name))
+ if (gdbarch_tdep (current_gdbarch)->pc_in_sigtramp (pc, name))
return &alpha_sigtramp_frame_unwind;
return NULL;
static int blurb_printed = 0;
if (fence == tdep->vm_min_address)
- warning ("Hit beginning of text section without finding");
+ warning (_("Hit beginning of text section without finding \
+enclosing function for address 0x%s"), paddr_nz (orig_pc));
else
- warning ("Hit heuristic-fence-post without finding");
- warning ("enclosing function for address 0x%s", paddr_nz (orig_pc));
+ warning (_("Hit heuristic-fence-post without finding \
+enclosing function for address 0x%s"), paddr_nz (orig_pc));
if (!blurb_printed)
{
- printf_filtered ("\
+ printf_filtered (_("\
This warning occurs if you are debugging a function without any symbols\n\
(for example, in a stripped executable). In that case, you may wish to\n\
increase the size of the search with the `set heuristic-fence-post' command.\n\
\n\
Otherwise, you told GDB there was a function where there isn't one, or\n\
-(more likely) you have encountered a bug in GDB.\n");
+(more likely) you have encountered a bug in GDB.\n"));
blurb_printed = 1;
}
}
{
reg = (word & 0x03e00000) >> 21;
+ /* Ignore this instruction if we have already encountered
+ an instruction saving the same register earlier in the
+ function code. The current instruction does not tell
+ us where the original value upon function entry is saved.
+ 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])
+ continue;
+
if (reg == 31)
continue;
struct alpha_heuristic_unwind_cache *info
= alpha_heuristic_frame_unwind_cache (next_frame, this_prologue_cache, 0);
- /* This is meant to halt the backtrace at "_start". Make sure we
- don't halt it at a generic dummy frame. */
- if (inside_entry_file (info->start_pc))
- return;
-
*this_id = frame_id_build (info->vfp, info->start_pc);
}
}
/* Otherwise assume the next frame has the same register value. */
- frame_register (next_frame, regnum, optimizedp, lvalp, addrp,
- realnump, bufferp);
+ frame_register_unwind (next_frame, regnum, optimizedp, lvalp, addrp,
+ realnump, bufferp);
}
static const struct frame_unwind alpha_heuristic_frame_unwind = {
};
static const struct frame_unwind *
-alpha_heuristic_frame_p (CORE_ADDR pc)
+alpha_heuristic_frame_sniffer (struct frame_info *next_frame)
{
return &alpha_heuristic_frame_unwind;
}
}
\f
-/* ALPHA stack frames are almost impenetrable. When execution stops,
- we basically have to look at symbol information for the function
- that we stopped in, which tells us *which* register (if any) is
- the base of the frame pointer, and what offset from that register
- the frame itself is at.
-
- This presents a problem when trying to examine a stack in memory
- (that isn't executing at the moment), using the "frame" command. We
- don't have a PC, nor do we have any registers except SP.
-
- This routine takes two arguments, SP and PC, and tries to make the
- cached frames look as if these two arguments defined a frame on the
- cache. This allows the rest of info frame to extract the important
- arguments without difficulty. */
-
-struct frame_info *
-alpha_setup_arbitrary_frame (int argc, CORE_ADDR *argv)
-{
- if (argc != 2)
- error ("ALPHA frame specifications require two arguments: sp and pc");
-
- return create_new_frame (argv[0], argv[1]);
-}
-
/* Assuming NEXT_FRAME->prev is a dummy, return the frame ID of that
dummy frame. The frame ID's base needs to match the TOS value
saved by save_dummy_frame_tos(), and the PC match the dummy frame's
for (i = 0; i < 31; ++i)
if (regno == i || regno == -1)
- supply_register (i, (const char *)r0_r30 + i*8);
+ regcache_raw_supply (current_regcache, i, (const char *)r0_r30 + i*8);
if (regno == ALPHA_ZERO_REGNUM || regno == -1)
- supply_register (ALPHA_ZERO_REGNUM, NULL);
+ regcache_raw_supply (current_regcache, ALPHA_ZERO_REGNUM, NULL);
if (regno == ALPHA_PC_REGNUM || regno == -1)
- supply_register (ALPHA_PC_REGNUM, pc);
+ regcache_raw_supply (current_regcache, ALPHA_PC_REGNUM, pc);
if (regno == ALPHA_UNIQUE_REGNUM || regno == -1)
- supply_register (ALPHA_UNIQUE_REGNUM, unique);
+ regcache_raw_supply (current_regcache, ALPHA_UNIQUE_REGNUM, unique);
}
void
for (i = 0; i < 31; ++i)
if (regno == i || regno == -1)
- regcache_collect (i, (char *)r0_r30 + i*8);
+ regcache_raw_collect (current_regcache, i, (char *)r0_r30 + i*8);
if (regno == ALPHA_PC_REGNUM || regno == -1)
- regcache_collect (ALPHA_PC_REGNUM, pc);
+ regcache_raw_collect (current_regcache, ALPHA_PC_REGNUM, pc);
if (unique && (regno == ALPHA_UNIQUE_REGNUM || regno == -1))
- regcache_collect (ALPHA_UNIQUE_REGNUM, unique);
+ regcache_raw_collect (current_regcache, ALPHA_UNIQUE_REGNUM, unique);
}
void
for (i = ALPHA_FP0_REGNUM; i < ALPHA_FP0_REGNUM + 31; ++i)
if (regno == i || regno == -1)
- supply_register (i, (const char *)f0_f30 + (i - ALPHA_FP0_REGNUM) * 8);
+ regcache_raw_supply (current_regcache, i,
+ (const char *)f0_f30 + (i - ALPHA_FP0_REGNUM) * 8);
if (regno == ALPHA_FPCR_REGNUM || regno == -1)
- supply_register (ALPHA_FPCR_REGNUM, fpcr);
+ regcache_raw_supply (current_regcache, ALPHA_FPCR_REGNUM, fpcr);
}
void
for (i = ALPHA_FP0_REGNUM; i < ALPHA_FP0_REGNUM + 31; ++i)
if (regno == i || regno == -1)
- regcache_collect (i, (char *)f0_f30 + (i - ALPHA_FP0_REGNUM) * 8);
+ regcache_raw_collect (current_regcache, i,
+ (char *)f0_f30 + (i - ALPHA_FP0_REGNUM) * 8);
if (regno == ALPHA_FPCR_REGNUM || regno == -1)
- regcache_collect (ALPHA_FPCR_REGNUM, fpcr);
+ regcache_raw_collect (current_regcache, ALPHA_FPCR_REGNUM, fpcr);
}
\f
/* Lowest text address. This is used by heuristic_proc_start()
to decide when to stop looking. */
- tdep->vm_min_address = (CORE_ADDR) 0x120000000;
+ tdep->vm_min_address = (CORE_ADDR) 0x120000000LL;
tdep->dynamic_sigtramp_offset = NULL;
tdep->sigcontext_addr = NULL;
+ tdep->sc_pc_offset = 2 * 8;
+ tdep->sc_regs_offset = 4 * 8;
+ tdep->sc_fpregs_offset = tdep->sc_regs_offset + 32 * 8 + 8;
tdep->jb_pc = -1; /* longjmp support not enabled by default */
set_gdbarch_fp0_regnum (gdbarch, ALPHA_FP0_REGNUM);
set_gdbarch_register_name (gdbarch, alpha_register_name);
- set_gdbarch_register_byte (gdbarch, alpha_register_byte);
- set_gdbarch_register_raw_size (gdbarch, alpha_register_raw_size);
- set_gdbarch_register_virtual_size (gdbarch, alpha_register_virtual_size);
+ set_gdbarch_deprecated_register_byte (gdbarch, alpha_register_byte);
set_gdbarch_register_type (gdbarch, alpha_register_type);
set_gdbarch_cannot_fetch_register (gdbarch, alpha_cannot_fetch_register);
set_gdbarch_print_insn (gdbarch, print_insn_alpha);
/* Call info. */
- set_gdbarch_frame_num_args (gdbarch, frame_num_args_unknown);
- set_gdbarch_frameless_function_invocation (gdbarch,
- generic_frameless_function_invocation_not);
- set_gdbarch_use_struct_convention (gdbarch, alpha_use_struct_convention);
+ set_gdbarch_deprecated_use_struct_convention (gdbarch, always_use_struct_convention);
set_gdbarch_extract_return_value (gdbarch, alpha_extract_return_value);
set_gdbarch_store_return_value (gdbarch, alpha_store_return_value);
- set_gdbarch_extract_struct_value_address (gdbarch,
- alpha_extract_struct_value_address);
+ set_gdbarch_deprecated_extract_struct_value_address (gdbarch, alpha_extract_struct_value_address);
/* Settings for calling functions in the inferior. */
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_save_dummy_frame_tos (gdbarch, generic_save_dummy_frame_tos);
/* Return the unwound PC value. */
set_gdbarch_unwind_pc (gdbarch, alpha_unwind_pc);
set_gdbarch_breakpoint_from_pc (gdbarch, alpha_breakpoint_from_pc);
set_gdbarch_decr_pc_after_break (gdbarch, 4);
- set_gdbarch_function_start_offset (gdbarch, 0);
- set_gdbarch_frame_args_skip (gdbarch, 0);
-
/* Hook in ABI-specific overrides, if they have been registered. */
gdbarch_init_osabi (info, gdbarch);
if (tdep->jb_pc >= 0)
set_gdbarch_get_longjmp_target (gdbarch, alpha_get_longjmp_target);
- frame_unwind_append_predicate (gdbarch, alpha_sigtramp_frame_p);
- frame_unwind_append_predicate (gdbarch, alpha_heuristic_frame_p);
+ frame_unwind_append_sniffer (gdbarch, alpha_sigtramp_frame_sniffer);
+ frame_unwind_append_sniffer (gdbarch, alpha_heuristic_frame_sniffer);
frame_base_set_default (gdbarch, &alpha_heuristic_frame_base);
void
alpha_dwarf2_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
- frame_unwind_append_predicate (gdbarch, dwarf2_frame_p);
- frame_base_append_predicate (gdbarch, dwarf2_frame_base_p);
- set_gdbarch_dwarf2_build_frame_info (gdbarch, dwarf2_build_frame_info);
+ frame_unwind_append_sniffer (gdbarch, dwarf2_frame_sniffer);
+ frame_base_append_sniffer (gdbarch, dwarf2_frame_base_sniffer);
}
+extern initialize_file_ftype _initialize_alpha_tdep; /* -Wmissing-prototypes */
+
void
_initialize_alpha_tdep (void)
{
/* We really would like to have both "0" and "unlimited" work, but
command.c doesn't deal with that. So make it a var_zinteger
because the user can always use "999999" or some such for unlimited. */
- c = add_set_cmd ("heuristic-fence-post", class_support, var_zinteger,
- (char *) &heuristic_fence_post,
- "\
-Set the distance searched for the start of a function.\n\
-If you are debugging a stripped executable, GDB needs to search through the\n\
-program for the start of a function. This command sets the distance of the\n\
-search. The only need to set it is when debugging a stripped executable.",
- &setlist);
/* We need to throw away the frame cache when we set this, since it
might change our ability to get backtraces. */
- set_cmd_sfunc (c, reinit_frame_cache_sfunc);
- add_show_from_set (c, &showlist);
+ add_setshow_zinteger_cmd ("heuristic-fence-post", class_support,
+ &heuristic_fence_post,
+ _("\
+Set the distance searched for the start of a function."),
+ _("\
+Show the distance searched for the start of a function."),
+ _("\
+If you are debugging a stripped executable, GDB needs to search through the\n\
+program for the start of a function. This command sets the distance of the\n\
+search. The only need to set it is when debugging a stripped executable."),
+ _("\
+The distance searched for the start of a function is \"%d\"."),
+ reinit_frame_cache_sfunc, NULL,
+ &setlist, &showlist);
}
projects / deliverable / binutils-gdb.git / blobdiff