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Diffstat (limited to 'gdb/nat-sparc.c')
| -rw-r--r-- | gdb/nat-sparc.c | 297 |
1 files changed, 0 insertions, 297 deletions
diff --git a/gdb/nat-sparc.c b/gdb/nat-sparc.c index fb78d2d..e69de29 100644 --- a/gdb/nat-sparc.c +++ b/gdb/nat-sparc.c @@ -1,297 +0,0 @@ -/* Functions specific to running gdb native on a Sun 4 running sunos4. - Copyright (C) 1989, 1992, 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ - -#include "defs.h" -#include "inferior.h" -#include "target.h" -#include "nat.h" - -#include <signal.h> -#include <sys/ptrace.h> -#include <sys/wait.h> -#include <machine/reg.h> - -/* We don't store all registers immediately when requested, since they - get sent over in large chunks anyway. Instead, we accumulate most - of the changes and send them over once. "deferred_stores" keeps - track of which sets of registers we have locally-changed copies of, - so we only need send the groups that have changed. */ - -#define INT_REGS 1 -#define STACK_REGS 2 -#define FP_REGS 4 - -/* Fetch one or more registers from the inferior. REGNO == -1 to get - them all. We actually fetch more than requested, when convenient, - marking them as valid so we won't fetch them again. */ - -void -fetch_inferior_registers (regno) - int regno; -{ - struct regs inferior_registers; - struct fp_status inferior_fp_registers; - int i; - - /* We should never be called with deferred stores, because a prerequisite - for writing regs is to have fetched them all (PREPARE_TO_STORE), sigh. */ - if (deferred_stores) abort(); - - DO_DEFERRED_STORES; - - /* Global and Out regs are fetched directly, as well as the control - registers. If we're getting one of the in or local regs, - and the stack pointer has not yet been fetched, - we have to do that first, since they're found in memory relative - to the stack pointer. */ - if (regno < O7_REGNUM /* including -1 */ - || regno >= Y_REGNUM - || (!register_valid[SP_REGNUM] && regno < I7_REGNUM)) - { - if (0 != ptrace (PTRACE_GETREGS, inferior_pid, - (PTRACE_ARG3_TYPE) &inferior_registers, 0)) - perror("ptrace_getregs"); - - registers[REGISTER_BYTE (0)] = 0; - memcpy (®isters[REGISTER_BYTE (1)], &inferior_registers.r_g1, - 15 * REGISTER_RAW_SIZE (G0_REGNUM)); - *(int *)®isters[REGISTER_BYTE (PS_REGNUM)] = inferior_registers.r_ps; - *(int *)®isters[REGISTER_BYTE (PC_REGNUM)] = inferior_registers.r_pc; - *(int *)®isters[REGISTER_BYTE (NPC_REGNUM)] = inferior_registers.r_npc; - *(int *)®isters[REGISTER_BYTE (Y_REGNUM)] = inferior_registers.r_y; - - for (i = G0_REGNUM; i <= O7_REGNUM; i++) - register_valid[i] = 1; - register_valid[Y_REGNUM] = 1; - register_valid[PS_REGNUM] = 1; - register_valid[PC_REGNUM] = 1; - register_valid[NPC_REGNUM] = 1; - /* If we don't set these valid, read_register_bytes() rereads - all the regs every time it is called! FIXME. */ - register_valid[WIM_REGNUM] = 1; /* Not true yet, FIXME */ - register_valid[TBR_REGNUM] = 1; /* Not true yet, FIXME */ - register_valid[FPS_REGNUM] = 1; /* Not true yet, FIXME */ - register_valid[CPS_REGNUM] = 1; /* Not true yet, FIXME */ - } - - /* Floating point registers */ - if (regno == -1 || (regno >= FP0_REGNUM && regno <= FP0_REGNUM + 31)) - { - if (0 != ptrace (PTRACE_GETFPREGS, inferior_pid, - (PTRACE_ARG3_TYPE) &inferior_fp_registers, - 0)) - perror("ptrace_getfpregs"); - memcpy (®isters[REGISTER_BYTE (FP0_REGNUM)], &inferior_fp_registers, - sizeof inferior_fp_registers.fpu_fr); - /* bcopy (&inferior_fp_registers.Fpu_fsr, - ®isters[REGISTER_BYTE (FPS_REGNUM)], - sizeof (FPU_FSR_TYPE)); FIXME??? -- gnu@cyg */ - for (i = FP0_REGNUM; i <= FP0_REGNUM+31; i++) - register_valid[i] = 1; - register_valid[FPS_REGNUM] = 1; - } - - /* These regs are saved on the stack by the kernel. Only read them - all (16 ptrace calls!) if we really need them. */ - if (regno == -1) - { - target_xfer_memory (*(CORE_ADDR*)®isters[REGISTER_BYTE (SP_REGNUM)], - ®isters[REGISTER_BYTE (L0_REGNUM)], - 16*REGISTER_RAW_SIZE (L0_REGNUM), 0); - for (i = L0_REGNUM; i <= I7_REGNUM; i++) - register_valid[i] = 1; - } - else if (regno >= L0_REGNUM && regno <= I7_REGNUM) - { - CORE_ADDR sp = *(CORE_ADDR*)®isters[REGISTER_BYTE (SP_REGNUM)]; - i = REGISTER_BYTE (regno); - if (register_valid[regno]) - printf("register %d valid and read\n", regno); - target_xfer_memory (sp + i - REGISTER_BYTE (L0_REGNUM), - ®isters[i], REGISTER_RAW_SIZE (regno), 0); - register_valid[regno] = 1; - } -} - -/* Store our register values back into the inferior. - If REGNO is -1, do this for all registers. - Otherwise, REGNO specifies which register (so we can save time). */ - -void -store_inferior_registers (regno) - int regno; -{ - struct regs inferior_registers; - struct fp_status inferior_fp_registers; - int wanna_store = INT_REGS + STACK_REGS + FP_REGS; - - /* First decide which pieces of machine-state we need to modify. - Default for regno == -1 case is all pieces. */ - if (regno >= 0) - if (FP0_REGNUM <= regno && regno < FP0_REGNUM + 32) - { - wanna_store = FP_REGS; - } - else - { - if (regno == SP_REGNUM) - wanna_store = INT_REGS + STACK_REGS; - else if (regno < L0_REGNUM || regno > I7_REGNUM) - wanna_store = INT_REGS; - else - wanna_store = STACK_REGS; - } - - /* See if we're forcing the stores to happen now, or deferring. */ - if (regno == -2) - { - wanna_store = deferred_stores; - deferred_stores = 0; - } - else - { - if (wanna_store == STACK_REGS) - { - /* Fall through and just store one stack reg. If we deferred - it, we'd have to store them all, or remember more info. */ - } - else - { - deferred_stores |= wanna_store; - return; - } - } - - if (wanna_store & STACK_REGS) - { - CORE_ADDR sp = *(CORE_ADDR *)®isters[REGISTER_BYTE (SP_REGNUM)]; - - if (regno < 0 || regno == SP_REGNUM) - { - if (!register_valid[L0_REGNUM+5]) abort(); - target_xfer_memory (sp, - ®isters[REGISTER_BYTE (L0_REGNUM)], - 16*REGISTER_RAW_SIZE (L0_REGNUM), 1); - } - else - { - if (!register_valid[regno]) abort(); - target_xfer_memory (sp + REGISTER_BYTE (regno) - REGISTER_BYTE (L0_REGNUM), - ®isters[REGISTER_BYTE (regno)], - REGISTER_RAW_SIZE (regno), 1); - } - - } - - if (wanna_store & INT_REGS) - { - if (!register_valid[G1_REGNUM]) abort(); - - memcpy (&inferior_registers.r_g1, ®isters[REGISTER_BYTE (G1_REGNUM)], - 15 * REGISTER_RAW_SIZE (G1_REGNUM)); - - inferior_registers.r_ps = - *(int *)®isters[REGISTER_BYTE (PS_REGNUM)]; - inferior_registers.r_pc = - *(int *)®isters[REGISTER_BYTE (PC_REGNUM)]; - inferior_registers.r_npc = - *(int *)®isters[REGISTER_BYTE (NPC_REGNUM)]; - inferior_registers.r_y = - *(int *)®isters[REGISTER_BYTE (Y_REGNUM)]; - - if (0 != ptrace (PTRACE_SETREGS, inferior_pid, - (PTRACE_ARG3_TYPE) &inferior_registers, 0)) - perror("ptrace_setregs"); - } - - if (wanna_store & FP_REGS) - { - if (!register_valid[FP0_REGNUM+9]) abort(); - memcpy (&inferior_fp_registers, ®isters[REGISTER_BYTE (FP0_REGNUM)], - sizeof inferior_fp_registers.fpu_fr); - -/* memcpy (&inferior_fp_registers.Fpu_fsr, - ®isters[REGISTER_BYTE (FPS_REGNUM)], sizeof (FPU_FSR_TYPE)); -****/ - if (0 != - ptrace (PTRACE_SETFPREGS, inferior_pid, - (PTRACE_ARG3_TYPE) &inferior_fp_registers, 0)) - perror("ptrace_setfpregs"); - } -} - - -void -fetch_core_registers (core_reg_sect, core_reg_size, which, ignore) - char *core_reg_sect; - unsigned core_reg_size; - int which; - unsigned int ignore; /* reg addr, unused in this version */ -{ - - if (which == 0) { - - /* Integer registers */ - -#define gregs ((struct regs *)core_reg_sect) - /* G0 *always* holds 0. */ - *(int *)®isters[REGISTER_BYTE (0)] = 0; - - /* The globals and output registers. */ - memcpy (®isters[REGISTER_BYTE (G1_REGNUM)], &gregs->r_g1, - 15 * REGISTER_RAW_SIZE (G1_REGNUM)); - *(int *)®isters[REGISTER_BYTE (PS_REGNUM)] = gregs->r_ps; - *(int *)®isters[REGISTER_BYTE (PC_REGNUM)] = gregs->r_pc; - *(int *)®isters[REGISTER_BYTE (NPC_REGNUM)] = gregs->r_npc; - *(int *)®isters[REGISTER_BYTE (Y_REGNUM)] = gregs->r_y; - - /* My best guess at where to get the locals and input - registers is exactly where they usually are, right above - the stack pointer. If the core dump was caused by a bus error - from blowing away the stack pointer (as is possible) then this - won't work, but it's worth the try. */ - { - int sp; - - sp = *(int *)®isters[REGISTER_BYTE (SP_REGNUM)]; - if (0 != target_read_memory (sp, ®isters[REGISTER_BYTE (L0_REGNUM)], - 16 * REGISTER_RAW_SIZE (L0_REGNUM))) - { - /* fprintf so user can still use gdb */ - fprintf (stderr, - "Couldn't read input and local registers from core file\n"); - } - } - } else if (which == 2) { - - /* Floating point registers */ - -#define fpuregs ((struct fpu *) core_reg_sect) - if (core_reg_size >= sizeof (struct fpu)) - { - memcpy (®isters[REGISTER_BYTE (FP0_REGNUM)], fpuregs->fpu_regs, - sizeof (fpuregs->fpu_regs)); - memcpy (®isters[REGISTER_BYTE (FPS_REGNUM)], &fpuregs->fpu_fsr, - sizeof (FPU_FSR_TYPE)); - } - else - fprintf (stderr, "Couldn't read float regs from core file\n"); - } -} - |