--- /dev/null
+/* 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 "nm.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");
+ }
+}
+
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