| /* Low level Alpha interface, for GDB when running native. |
| Copyright 1993, 1995, 1996, 1998, 1999, 2000, 2001, 2003 |
| 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 "gdb_string.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 const 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 |
| }; |
| |
| for (regno = 0; regno < ALPHA_NUM_REGS; regno++) |
| { |
| if (CANNOT_FETCH_REGISTER (regno)) |
| { |
| supply_register (regno, NULL); |
| continue; |
| } |
| addr = 8 * core_reg_mapping[regno]; |
| if (addr < 0 || addr >= core_reg_size) |
| { |
| /* ??? UNIQUE is a new addition. Don't generate an error. */ |
| if (regno == ALPHA_UNIQUE_REGNUM) |
| { |
| supply_register (regno, NULL); |
| continue; |
| } |
| 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; |
| } |
| |
| switch (which) |
| { |
| case 0: /* integer registers */ |
| /* PC is in slot 32; UNIQUE is in slot 33, if present. */ |
| alpha_supply_int_regs (-1, core_reg_sect, core_reg_sect + 31*8, |
| (core_reg_size >= 33 * 8 |
| ? core_reg_sect + 32*8 : NULL)); |
| break; |
| |
| case 2: /* floating-point registers */ |
| /* FPCR is in slot 32. */ |
| alpha_supply_fp_regs (-1, core_reg_sect, core_reg_sect + 31*8); |
| break; |
| |
| default: |
| break; |
| } |
| } |
| |
| |
| /* Map gdb internal register number to a ptrace ``address''. |
| These ``addresses'' are defined in <sys/ptrace.h>, with |
| the exception of ALPHA_UNIQUE_PTRACE_ADDR. */ |
| |
| #ifndef ALPHA_UNIQUE_PTRACE_ADDR |
| #define ALPHA_UNIQUE_PTRACE_ADDR 0 |
| #endif |
| |
| CORE_ADDR |
| register_addr (int regno, CORE_ADDR blockend) |
| { |
| if (regno == PC_REGNUM) |
| return PC; |
| if (regno == ALPHA_UNIQUE_REGNUM) |
| return ALPHA_UNIQUE_PTRACE_ADDR; |
| if (regno < FP0_REGNUM) |
| return GPR_BASE + regno; |
| else |
| return FPR_BASE + regno - FP0_REGNUM; |
| } |
| |
| 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" |
| |
| /* Locate the UNIQUE value within the gregset_t. */ |
| #ifndef ALPHA_REGSET_UNIQUE |
| #define ALPHA_REGSET_UNIQUE(ptr) NULL |
| #endif |
| |
| /* |
| * See the comment in m68k-tdep.c regarding the utility of these functions. |
| */ |
| |
| void |
| supply_gregset (gdb_gregset_t *gregsetp) |
| { |
| register long *regp = ALPHA_REGSET_BASE (gregsetp); |
| void *unique = ALPHA_REGSET_UNIQUE (gregsetp); |
| |
| /* PC is in slot 32. */ |
| alpha_supply_int_regs (-1, regp, regp + 31, unique); |
| } |
| |
| void |
| fill_gregset (gdb_gregset_t *gregsetp, int regno) |
| { |
| register long *regp = ALPHA_REGSET_BASE (gregsetp); |
| void *unique = ALPHA_REGSET_UNIQUE (gregsetp); |
| |
| /* PC is in slot 32. */ |
| alpha_fill_int_regs (regno, regp, regp + 31, unique); |
| } |
| |
| /* |
| * 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 long *regp = ALPHA_REGSET_BASE (fpregsetp); |
| |
| /* FPCR is in slot 32. */ |
| alpha_supply_fp_regs (-1, regp, regp + 31); |
| } |
| |
| void |
| fill_fpregset (gdb_fpregset_t *fpregsetp, int regno) |
| { |
| register long *regp = ALPHA_REGSET_BASE (fpregsetp); |
| |
| /* FPCR is in slot 32. */ |
| alpha_fill_fp_regs (regno, regp, regp + 31); |
| } |
| #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); |
| } |