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authorStan Shebs <shebs@codesourcery.com>1999-04-16 01:34:07 +0000
committerStan Shebs <shebs@codesourcery.com>1999-04-16 01:34:07 +0000
commit071ea11e85eb9d529cc5eb3d35f6247466a21b99 (patch)
tree5deda65b8d7b04d1f4cbc534c3206d328e1267ec /gdb/alpha-nat.c
parent1730ec6b1848f0f32154277f788fb29f88d8475b (diff)
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Initial creation of sourceware repository
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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 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 <sys/ptrace.h>
-#ifdef __linux__
-# include <asm/reg.h>
-# include <alpha/ptrace.h>
-#else
-# include <machine/reg.h>
-#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];
-
- jb_addr = read_register(A0_REGNUM);
-
- if (target_read_memory(jb_addr + JB_PC * JB_ELEMENT_SIZE, raw_buffer,
- sizeof(CORE_ADDR)))
- return 0;
-
- *pc = extract_address (raw_buffer, sizeof(CORE_ADDR));
- 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
- 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 (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)
- 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
- };
- static char zerobuf[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 (core_reg_sect, core_reg_size, which, reg_addr)
- 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 (V0_REGNUM)], core_reg_sect, 31*8);
- memcpy (&registers[REGISTER_BYTE (PC_REGNUM)], core_reg_sect+31*8, 8);
- memset (&registers[REGISTER_BYTE (ZERO_REGNUM)], 0, 8);
- memset (&register_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.
- */
-
-void
-supply_gregset (gregsetp)
- gregset_t *gregsetp;
-{
- register int regi;
- register long *regp = ALPHA_REGSET_BASE (gregsetp);
- static char zerobuf[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 (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 *) &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 (fpregsetp)
- 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 (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 *) &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,
- fetch_osf_core_registers,
- NULL
-};
-
-static struct core_fns alpha_elf_core_fns =
-{
- bfd_target_elf_flavour,
- fetch_elf_core_registers,
- NULL
-};
-
-void
-_initialize_core_alpha ()
-{
- add_core_fns (&alpha_osf_core_fns);
- add_core_fns (&alpha_elf_core_fns);
-}