1999-04-16 09:35:26 +08:00
|
|
|
|
/* Low level Alpha interface, for GDB when running native.
|
|
|
|
|
Copyright 1993, 1995, 1996, 1998 Free Software Foundation, Inc.
|
|
|
|
|
|
1999-07-08 04:19:36 +08:00
|
|
|
|
This file is part of GDB.
|
1999-04-16 09:35:26 +08:00
|
|
|
|
|
1999-07-08 04:19:36 +08:00
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
|
|
|
it under the terms of the GNU General Public License as published by
|
|
|
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
|
|
|
(at your option) any later version.
|
1999-04-16 09:35:26 +08:00
|
|
|
|
|
1999-07-08 04:19:36 +08:00
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
|
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
|
|
|
GNU General Public License for more details.
|
1999-04-16 09:35:26 +08:00
|
|
|
|
|
1999-07-08 04:19:36 +08:00
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
|
|
|
along with this program; if not, write to the Free Software
|
|
|
|
|
Foundation, Inc., 59 Temple Place - Suite 330,
|
|
|
|
|
Boston, MA 02111-1307, USA. */
|
1999-04-16 09:35:26 +08:00
|
|
|
|
|
|
|
|
|
#include "defs.h"
|
|
|
|
|
#include "inferior.h"
|
|
|
|
|
#include "gdbcore.h"
|
|
|
|
|
#include "target.h"
|
|
|
|
|
#include <sys/ptrace.h>
|
|
|
|
|
#ifdef __linux__
|
1999-07-08 04:19:36 +08:00
|
|
|
|
#include <asm/reg.h>
|
|
|
|
|
#include <alpha/ptrace.h>
|
1999-04-16 09:35:26 +08:00
|
|
|
|
#else
|
1999-07-08 04:19:36 +08:00
|
|
|
|
#include <machine/reg.h>
|
1999-04-16 09:35:26 +08:00
|
|
|
|
#endif
|
|
|
|
|
#include <sys/user.h>
|
|
|
|
|
|
|
|
|
|
/* Prototypes for local functions. */
|
|
|
|
|
|
|
|
|
|
static void fetch_osf_core_registers PARAMS ((char *,
|
|
|
|
|
unsigned, int, CORE_ADDR));
|
|
|
|
|
static void fetch_elf_core_registers PARAMS ((char *,
|
|
|
|
|
unsigned, int, CORE_ADDR));
|
|
|
|
|
|
|
|
|
|
/* Size of elements in jmpbuf */
|
|
|
|
|
|
|
|
|
|
#define JB_ELEMENT_SIZE 8
|
|
|
|
|
|
|
|
|
|
/* The definition for JB_PC in machine/reg.h is wrong.
|
|
|
|
|
And we can't get at the correct definition in setjmp.h as it is
|
|
|
|
|
not always available (eg. if _POSIX_SOURCE is defined which is the
|
|
|
|
|
default). As the defintion is unlikely to change (see comment
|
|
|
|
|
in <setjmp.h>, define the correct value here. */
|
|
|
|
|
|
|
|
|
|
#undef JB_PC
|
|
|
|
|
#define JB_PC 2
|
|
|
|
|
|
|
|
|
|
/* Figure out where the longjmp will land.
|
|
|
|
|
We expect the first arg to be a pointer to the jmp_buf structure from which
|
|
|
|
|
we extract the pc (JB_PC) that we will land at. The pc is copied into PC.
|
|
|
|
|
This routine returns true on success. */
|
|
|
|
|
|
|
|
|
|
int
|
|
|
|
|
get_longjmp_target (pc)
|
|
|
|
|
CORE_ADDR *pc;
|
|
|
|
|
{
|
|
|
|
|
CORE_ADDR jb_addr;
|
|
|
|
|
char raw_buffer[MAX_REGISTER_RAW_SIZE];
|
|
|
|
|
|
1999-07-08 04:19:36 +08:00
|
|
|
|
jb_addr = read_register (A0_REGNUM);
|
1999-04-16 09:35:26 +08:00
|
|
|
|
|
1999-07-08 04:19:36 +08:00
|
|
|
|
if (target_read_memory (jb_addr + JB_PC * JB_ELEMENT_SIZE, raw_buffer,
|
|
|
|
|
sizeof (CORE_ADDR)))
|
1999-04-16 09:35:26 +08:00
|
|
|
|
return 0;
|
|
|
|
|
|
1999-07-08 04:19:36 +08:00
|
|
|
|
*pc = extract_address (raw_buffer, sizeof (CORE_ADDR));
|
1999-04-16 09:35:26 +08:00
|
|
|
|
return 1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Extract the register values out of the core file and store
|
|
|
|
|
them where `read_register' will find them.
|
|
|
|
|
|
|
|
|
|
CORE_REG_SECT points to the register values themselves, read into memory.
|
|
|
|
|
CORE_REG_SIZE is the size of that area.
|
|
|
|
|
WHICH says which set of registers we are handling (0 = int, 2 = float
|
1999-07-08 04:19:36 +08:00
|
|
|
|
on machines where they are discontiguous).
|
1999-04-16 09:35:26 +08:00
|
|
|
|
REG_ADDR is the offset from u.u_ar0 to the register values relative to
|
1999-07-08 04:19:36 +08:00
|
|
|
|
core_reg_sect. This is used with old-fashioned core files to
|
|
|
|
|
locate the registers in a large upage-plus-stack ".reg" section.
|
|
|
|
|
Original upage address X is at location core_reg_sect+x+reg_addr.
|
1999-04-16 09:35:26 +08:00
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
fetch_osf_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
|
|
|
|
|
char *core_reg_sect;
|
|
|
|
|
unsigned core_reg_size;
|
|
|
|
|
int which;
|
|
|
|
|
CORE_ADDR reg_addr;
|
|
|
|
|
{
|
|
|
|
|
register int regno;
|
|
|
|
|
register int addr;
|
|
|
|
|
int bad_reg = -1;
|
|
|
|
|
|
|
|
|
|
/* Table to map a gdb regnum to an index in the core register section.
|
|
|
|
|
The floating point register values are garbage in OSF/1.2 core files. */
|
|
|
|
|
static int core_reg_mapping[NUM_REGS] =
|
|
|
|
|
{
|
|
|
|
|
#define EFL (EF_SIZE / 8)
|
1999-07-08 04:19:36 +08:00
|
|
|
|
EF_V0, EF_T0, EF_T1, EF_T2, EF_T3, EF_T4, EF_T5, EF_T6,
|
|
|
|
|
EF_T7, EF_S0, EF_S1, EF_S2, EF_S3, EF_S4, EF_S5, EF_S6,
|
|
|
|
|
EF_A0, EF_A1, EF_A2, EF_A3, EF_A4, EF_A5, EF_T8, EF_T9,
|
|
|
|
|
EF_T10, EF_T11, EF_RA, EF_T12, EF_AT, EF_GP, EF_SP, -1,
|
|
|
|
|
EFL + 0, EFL + 1, EFL + 2, EFL + 3, EFL + 4, EFL + 5, EFL + 6, EFL + 7,
|
|
|
|
|
EFL + 8, EFL + 9, EFL + 10, EFL + 11, EFL + 12, EFL + 13, EFL + 14, EFL + 15,
|
|
|
|
|
EFL + 16, EFL + 17, EFL + 18, EFL + 19, EFL + 20, EFL + 21, EFL + 22, EFL + 23,
|
|
|
|
|
EFL + 24, EFL + 25, EFL + 26, EFL + 27, EFL + 28, EFL + 29, EFL + 30, EFL + 31,
|
|
|
|
|
EF_PC, -1
|
1999-04-16 09:35:26 +08:00
|
|
|
|
};
|
1999-07-08 04:19:36 +08:00
|
|
|
|
static char zerobuf[MAX_REGISTER_RAW_SIZE] =
|
|
|
|
|
{0};
|
1999-04-16 09:35:26 +08:00
|
|
|
|
|
|
|
|
|
for (regno = 0; regno < NUM_REGS; regno++)
|
|
|
|
|
{
|
|
|
|
|
if (CANNOT_FETCH_REGISTER (regno))
|
|
|
|
|
{
|
|
|
|
|
supply_register (regno, zerobuf);
|
|
|
|
|
continue;
|
|
|
|
|
}
|
|
|
|
|
addr = 8 * core_reg_mapping[regno];
|
|
|
|
|
if (addr < 0 || addr >= core_reg_size)
|
|
|
|
|
{
|
|
|
|
|
if (bad_reg < 0)
|
|
|
|
|
bad_reg = regno;
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
supply_register (regno, core_reg_sect + addr);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
if (bad_reg >= 0)
|
|
|
|
|
{
|
|
|
|
|
error ("Register %s not found in core file.", REGISTER_NAME (bad_reg));
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
fetch_elf_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
|
|
|
|
|
char *core_reg_sect;
|
|
|
|
|
unsigned core_reg_size;
|
|
|
|
|
int which;
|
|
|
|
|
CORE_ADDR reg_addr;
|
|
|
|
|
{
|
1999-07-08 04:19:36 +08:00
|
|
|
|
if (core_reg_size < 32 * 8)
|
1999-04-16 09:35:26 +08:00
|
|
|
|
{
|
|
|
|
|
error ("Core file register section too small (%u bytes).", core_reg_size);
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (which == 2)
|
|
|
|
|
{
|
|
|
|
|
/* The FPU Registers. */
|
1999-07-08 04:19:36 +08:00
|
|
|
|
memcpy (®isters[REGISTER_BYTE (FP0_REGNUM)], core_reg_sect, 31 * 8);
|
|
|
|
|
memset (®isters[REGISTER_BYTE (FP0_REGNUM + 31)], 0, 8);
|
1999-04-16 09:35:26 +08:00
|
|
|
|
memset (®ister_valid[FP0_REGNUM], 1, 32);
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
/* The General Registers. */
|
1999-07-08 04:19:36 +08:00
|
|
|
|
memcpy (®isters[REGISTER_BYTE (V0_REGNUM)], core_reg_sect, 31 * 8);
|
|
|
|
|
memcpy (®isters[REGISTER_BYTE (PC_REGNUM)], core_reg_sect + 31 * 8, 8);
|
1999-04-16 09:35:26 +08:00
|
|
|
|
memset (®isters[REGISTER_BYTE (ZERO_REGNUM)], 0, 8);
|
|
|
|
|
memset (®ister_valid[V0_REGNUM], 1, 32);
|
|
|
|
|
register_valid[PC_REGNUM] = 1;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* Map gdb internal register number to a ptrace ``address''.
|
|
|
|
|
These ``addresses'' are defined in <sys/ptrace.h> */
|
|
|
|
|
|
|
|
|
|
#define REGISTER_PTRACE_ADDR(regno) \
|
|
|
|
|
(regno < FP0_REGNUM ? GPR_BASE + (regno) \
|
|
|
|
|
: regno == PC_REGNUM ? PC \
|
|
|
|
|
: regno >= FP0_REGNUM ? FPR_BASE + ((regno) - FP0_REGNUM) \
|
|
|
|
|
: 0)
|
|
|
|
|
|
|
|
|
|
/* Return the ptrace ``address'' of register REGNO. */
|
|
|
|
|
|
|
|
|
|
CORE_ADDR
|
|
|
|
|
register_addr (regno, blockend)
|
|
|
|
|
int regno;
|
|
|
|
|
CORE_ADDR blockend;
|
|
|
|
|
{
|
|
|
|
|
return REGISTER_PTRACE_ADDR (regno);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
int
|
|
|
|
|
kernel_u_size ()
|
|
|
|
|
{
|
|
|
|
|
return (sizeof (struct user));
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#if defined(USE_PROC_FS) || defined(HAVE_GREGSET_T)
|
|
|
|
|
#include <sys/procfs.h>
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* See the comment in m68k-tdep.c regarding the utility of these functions.
|
|
|
|
|
*/
|
|
|
|
|
|
1999-07-08 04:19:36 +08:00
|
|
|
|
void
|
1999-04-16 09:35:26 +08:00
|
|
|
|
supply_gregset (gregsetp)
|
|
|
|
|
gregset_t *gregsetp;
|
|
|
|
|
{
|
|
|
|
|
register int regi;
|
|
|
|
|
register long *regp = ALPHA_REGSET_BASE (gregsetp);
|
1999-07-08 04:19:36 +08:00
|
|
|
|
static char zerobuf[MAX_REGISTER_RAW_SIZE] =
|
|
|
|
|
{0};
|
1999-04-16 09:35:26 +08:00
|
|
|
|
|
|
|
|
|
for (regi = 0; regi < 31; regi++)
|
1999-07-08 04:19:36 +08:00
|
|
|
|
supply_register (regi, (char *) (regp + regi));
|
1999-04-16 09:35:26 +08:00
|
|
|
|
|
1999-07-08 04:19:36 +08:00
|
|
|
|
supply_register (PC_REGNUM, (char *) (regp + 31));
|
1999-04-16 09:35:26 +08:00
|
|
|
|
|
|
|
|
|
/* Fill inaccessible registers with zero. */
|
|
|
|
|
supply_register (ZERO_REGNUM, zerobuf);
|
|
|
|
|
supply_register (FP_REGNUM, zerobuf);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
void
|
|
|
|
|
fill_gregset (gregsetp, regno)
|
|
|
|
|
gregset_t *gregsetp;
|
|
|
|
|
int regno;
|
|
|
|
|
{
|
|
|
|
|
int regi;
|
|
|
|
|
register long *regp = ALPHA_REGSET_BASE (gregsetp);
|
|
|
|
|
|
|
|
|
|
for (regi = 0; regi < 31; regi++)
|
|
|
|
|
if ((regno == -1) || (regno == regi))
|
|
|
|
|
*(regp + regi) = *(long *) ®isters[REGISTER_BYTE (regi)];
|
|
|
|
|
|
|
|
|
|
if ((regno == -1) || (regno == PC_REGNUM))
|
|
|
|
|
*(regp + 31) = *(long *) ®isters[REGISTER_BYTE (PC_REGNUM)];
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Now we do the same thing for floating-point registers.
|
|
|
|
|
* Again, see the comments in m68k-tdep.c.
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
void
|
|
|
|
|
supply_fpregset (fpregsetp)
|
|
|
|
|
fpregset_t *fpregsetp;
|
|
|
|
|
{
|
|
|
|
|
register int regi;
|
|
|
|
|
register long *regp = ALPHA_REGSET_BASE (fpregsetp);
|
|
|
|
|
|
|
|
|
|
for (regi = 0; regi < 32; regi++)
|
1999-07-08 04:19:36 +08:00
|
|
|
|
supply_register (regi + FP0_REGNUM, (char *) (regp + regi));
|
1999-04-16 09:35:26 +08:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
void
|
|
|
|
|
fill_fpregset (fpregsetp, regno)
|
|
|
|
|
fpregset_t *fpregsetp;
|
|
|
|
|
int regno;
|
|
|
|
|
{
|
|
|
|
|
int regi;
|
|
|
|
|
register long *regp = ALPHA_REGSET_BASE (fpregsetp);
|
|
|
|
|
|
|
|
|
|
for (regi = FP0_REGNUM; regi < FP0_REGNUM + 32; regi++)
|
|
|
|
|
{
|
|
|
|
|
if ((regno == -1) || (regno == regi))
|
|
|
|
|
{
|
|
|
|
|
*(regp + regi - FP0_REGNUM) =
|
|
|
|
|
*(long *) ®isters[REGISTER_BYTE (regi)];
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
#endif
|
|
|
|
|
|
1999-07-08 04:19:36 +08:00
|
|
|
|
|
1999-04-16 09:35:26 +08:00
|
|
|
|
/* Register that we are able to handle alpha core file formats. */
|
|
|
|
|
|
|
|
|
|
static struct core_fns alpha_osf_core_fns =
|
|
|
|
|
{
|
|
|
|
|
/* This really is bfd_target_unknown_flavour. */
|
|
|
|
|
|
1999-10-06 07:13:56 +08:00
|
|
|
|
bfd_target_unknown_flavour, /* core_flavour */
|
|
|
|
|
default_check_format, /* check_format */
|
|
|
|
|
default_core_sniffer, /* core_sniffer */
|
|
|
|
|
fetch_osf_core_registers, /* core_read_registers */
|
|
|
|
|
NULL /* next */
|
1999-04-16 09:35:26 +08:00
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
static struct core_fns alpha_elf_core_fns =
|
|
|
|
|
{
|
1999-10-06 07:13:56 +08:00
|
|
|
|
bfd_target_elf_flavour, /* core_flavour */
|
|
|
|
|
default_check_format, /* check_format */
|
|
|
|
|
default_core_sniffer, /* core_sniffer */
|
|
|
|
|
fetch_elf_core_registers, /* core_read_registers */
|
|
|
|
|
NULL /* next */
|
1999-04-16 09:35:26 +08:00
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
void
|
|
|
|
|
_initialize_core_alpha ()
|
|
|
|
|
{
|
|
|
|
|
add_core_fns (&alpha_osf_core_fns);
|
|
|
|
|
add_core_fns (&alpha_elf_core_fns);
|
|
|
|
|
}
|