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-rw-r--r--gdb/alpha-nat.c278
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diff --git a/gdb/alpha-nat.c b/gdb/alpha-nat.c
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--- a/gdb/alpha-nat.c
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-/* Low level Alpha interface, for GDB when running native.
- Copyright 1993, 1995, 1996, 1998, 1999, 2000, 2001
- Free Software Foundation, Inc.
-
- This file is part of GDB.
-
- 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.
-
- 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.
-
- 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. */
-
-#include "defs.h"
-#include "inferior.h"
-#include "gdbcore.h"
-#include "target.h"
-#include "regcache.h"
-
-#include "alpha-tdep.h"
-
-#include <sys/ptrace.h>
-#ifdef __linux__
-#include <asm/reg.h>
-#include <alpha/ptrace.h>
-#else
-#include <alpha/coreregs.h>
-#endif
-#include <sys/user.h>
-
-/* Prototypes for local functions. */
-
-static void fetch_osf_core_registers (char *, unsigned, int, CORE_ADDR);
-static void fetch_elf_core_registers (char *, unsigned, int, CORE_ADDR);
-
-/* 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
- on machines where they are discontiguous).
- REG_ADDR is the offset from u.u_ar0 to the register values relative to
- 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.
- */
-
-static void
-fetch_osf_core_registers (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. OSF5 uses different names for the register
- enum list, need to handle two cases. The actual values are the
- same. */
- static int core_reg_mapping[ALPHA_NUM_REGS] =
- {
-#ifdef NCF_REGS
-#define EFL NCF_REGS
- CF_V0, CF_T0, CF_T1, CF_T2, CF_T3, CF_T4, CF_T5, CF_T6,
- CF_T7, CF_S0, CF_S1, CF_S2, CF_S3, CF_S4, CF_S5, CF_S6,
- CF_A0, CF_A1, CF_A2, CF_A3, CF_A4, CF_A5, CF_T8, CF_T9,
- CF_T10, CF_T11, CF_RA, CF_T12, CF_AT, CF_GP, CF_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,
- CF_PC, -1
-#else
-#define EFL (EF_SIZE / 8)
- 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
-#endif
- };
- static char zerobuf[ALPHA_MAX_REGISTER_RAW_SIZE] =
- {0};
-
- 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 (char *core_reg_sect, unsigned core_reg_size,
- int which, CORE_ADDR reg_addr)
-{
- if (core_reg_size < 32 * 8)
- {
- error ("Core file register section too small (%u bytes).", core_reg_size);
- return;
- }
-
- if (which == 2)
- {
- /* The FPU Registers. */
- memcpy (&registers[REGISTER_BYTE (FP0_REGNUM)], core_reg_sect, 31 * 8);
- memset (&registers[REGISTER_BYTE (FP0_REGNUM + 31)], 0, 8);
- memset (&register_valid[FP0_REGNUM], 1, 32);
- }
- else
- {
- /* The General Registers. */
- memcpy (&registers[REGISTER_BYTE (ALPHA_V0_REGNUM)], core_reg_sect,
- 31 * 8);
- memcpy (&registers[REGISTER_BYTE (PC_REGNUM)], core_reg_sect + 31 * 8, 8);
- memset (&registers[REGISTER_BYTE (ALPHA_ZERO_REGNUM)], 0, 8);
- memset (&register_valid[ALPHA_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 (int regno, CORE_ADDR blockend)
-{
- return REGISTER_PTRACE_ADDR (regno);
-}
-
-int
-kernel_u_size (void)
-{
- return (sizeof (struct user));
-}
-
-#if defined(USE_PROC_FS) || defined(HAVE_GREGSET_T)
-#include <sys/procfs.h>
-
-/* Prototypes for supply_gregset etc. */
-#include "gregset.h"
-
-/*
- * See the comment in m68k-tdep.c regarding the utility of these functions.
- */
-
-void
-supply_gregset (gdb_gregset_t *gregsetp)
-{
- register int regi;
- register long *regp = ALPHA_REGSET_BASE (gregsetp);
- static char zerobuf[ALPHA_MAX_REGISTER_RAW_SIZE] =
- {0};
-
- for (regi = 0; regi < 31; regi++)
- supply_register (regi, (char *) (regp + regi));
-
- supply_register (PC_REGNUM, (char *) (regp + 31));
-
- /* Fill inaccessible registers with zero. */
- supply_register (ALPHA_ZERO_REGNUM, zerobuf);
- supply_register (FP_REGNUM, zerobuf);
-}
-
-void
-fill_gregset (gdb_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 *) &registers[REGISTER_BYTE (regi)];
-
- if ((regno == -1) || (regno == PC_REGNUM))
- *(regp + 31) = *(long *) &registers[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 (gdb_fpregset_t *fpregsetp)
-{
- register int regi;
- register long *regp = ALPHA_REGSET_BASE (fpregsetp);
-
- for (regi = 0; regi < 32; regi++)
- supply_register (regi + FP0_REGNUM, (char *) (regp + regi));
-}
-
-void
-fill_fpregset (gdb_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 *) &registers[REGISTER_BYTE (regi)];
- }
- }
-}
-#endif
-
-
-/* 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. */
-
- 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 */
-};
-
-static struct core_fns alpha_elf_core_fns =
-{
- 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 */
-};
-
-void
-_initialize_core_alpha (void)
-{
- add_core_fns (&alpha_osf_core_fns);
- add_core_fns (&alpha_elf_core_fns);
-}
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