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https://sourceware.org/git/binutils-gdb.git
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199b2450f6
Change all references to stdout/stderr to gdb_stdout/gdb_stderr. Replace all calls to stdio output functions with calls to corresponding _unfiltered functions (`fprintf_unfiltered') Replaced calls to fopen for output to gdb_fopen. Added sufficient goo to utils.c and defs.h to make the above work. The net effect is that stdio output functions are only directly used in utils.c. Elsewhere, the _unfiltered and _filtered functions and GDB_FILE type are used. In the near future, GDB_FILE will stop being equivalant to FILE. The semantics of some commands has changed in a very subtle way: called in the right context, they may cause new occurences of prompt_for_continue() behavior. The testsuite doesn't notice anything like this, though. Please respect this change by not reintroducing stdio output dependencies in the main body of gdb code. All output from commands should go to a GDB_FILE. Target-specific code can still use stdio directly to communicate with targets.
303 lines
9.9 KiB
C
303 lines
9.9 KiB
C
/* Functions specific to running gdb native on a Sun 4 running sunos4.
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Copyright (C) 1989, 1992, Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include "defs.h"
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#include "inferior.h"
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#include "target.h"
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#include <signal.h>
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#include <sys/ptrace.h>
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#include <sys/wait.h>
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#include <machine/reg.h>
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/* We don't store all registers immediately when requested, since they
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get sent over in large chunks anyway. Instead, we accumulate most
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of the changes and send them over once. "deferred_stores" keeps
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track of which sets of registers we have locally-changed copies of,
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so we only need send the groups that have changed. */
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#define INT_REGS 1
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#define STACK_REGS 2
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#define FP_REGS 4
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/* Fetch one or more registers from the inferior. REGNO == -1 to get
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them all. We actually fetch more than requested, when convenient,
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marking them as valid so we won't fetch them again. */
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void
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fetch_inferior_registers (regno)
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int regno;
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{
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struct regs inferior_registers;
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struct fp_status inferior_fp_registers;
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int i;
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/* We should never be called with deferred stores, because a prerequisite
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for writing regs is to have fetched them all (PREPARE_TO_STORE), sigh. */
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if (deferred_stores) abort();
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DO_DEFERRED_STORES;
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/* Global and Out regs are fetched directly, as well as the control
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registers. If we're getting one of the in or local regs,
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and the stack pointer has not yet been fetched,
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we have to do that first, since they're found in memory relative
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to the stack pointer. */
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if (regno < O7_REGNUM /* including -1 */
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|| regno >= Y_REGNUM
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|| (!register_valid[SP_REGNUM] && regno < I7_REGNUM))
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{
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if (0 != ptrace (PTRACE_GETREGS, inferior_pid,
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(PTRACE_ARG3_TYPE) &inferior_registers, 0))
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perror("ptrace_getregs");
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registers[REGISTER_BYTE (0)] = 0;
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memcpy (®isters[REGISTER_BYTE (1)], &inferior_registers.r_g1,
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15 * REGISTER_RAW_SIZE (G0_REGNUM));
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*(int *)®isters[REGISTER_BYTE (PS_REGNUM)] = inferior_registers.r_ps;
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*(int *)®isters[REGISTER_BYTE (PC_REGNUM)] = inferior_registers.r_pc;
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*(int *)®isters[REGISTER_BYTE (NPC_REGNUM)] = inferior_registers.r_npc;
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*(int *)®isters[REGISTER_BYTE (Y_REGNUM)] = inferior_registers.r_y;
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for (i = G0_REGNUM; i <= O7_REGNUM; i++)
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register_valid[i] = 1;
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register_valid[Y_REGNUM] = 1;
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register_valid[PS_REGNUM] = 1;
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register_valid[PC_REGNUM] = 1;
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register_valid[NPC_REGNUM] = 1;
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/* If we don't set these valid, read_register_bytes() rereads
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all the regs every time it is called! FIXME. */
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register_valid[WIM_REGNUM] = 1; /* Not true yet, FIXME */
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register_valid[TBR_REGNUM] = 1; /* Not true yet, FIXME */
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register_valid[FPS_REGNUM] = 1; /* Not true yet, FIXME */
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register_valid[CPS_REGNUM] = 1; /* Not true yet, FIXME */
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}
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/* Floating point registers */
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if (regno == -1 || (regno >= FP0_REGNUM && regno <= FP0_REGNUM + 31))
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{
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if (0 != ptrace (PTRACE_GETFPREGS, inferior_pid,
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(PTRACE_ARG3_TYPE) &inferior_fp_registers,
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0))
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perror("ptrace_getfpregs");
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memcpy (®isters[REGISTER_BYTE (FP0_REGNUM)], &inferior_fp_registers,
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sizeof inferior_fp_registers.fpu_fr);
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/* memcpy (®isters[REGISTER_BYTE (FPS_REGNUM)],
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&inferior_fp_registers.Fpu_fsr,
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sizeof (FPU_FSR_TYPE)); FIXME??? -- gnu@cyg */
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for (i = FP0_REGNUM; i <= FP0_REGNUM+31; i++)
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register_valid[i] = 1;
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register_valid[FPS_REGNUM] = 1;
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}
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/* These regs are saved on the stack by the kernel. Only read them
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all (16 ptrace calls!) if we really need them. */
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if (regno == -1)
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{
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target_xfer_memory (*(CORE_ADDR*)®isters[REGISTER_BYTE (SP_REGNUM)],
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®isters[REGISTER_BYTE (L0_REGNUM)],
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16*REGISTER_RAW_SIZE (L0_REGNUM), 0);
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for (i = L0_REGNUM; i <= I7_REGNUM; i++)
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register_valid[i] = 1;
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}
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else if (regno >= L0_REGNUM && regno <= I7_REGNUM)
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{
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CORE_ADDR sp = *(CORE_ADDR*)®isters[REGISTER_BYTE (SP_REGNUM)];
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i = REGISTER_BYTE (regno);
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if (register_valid[regno])
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printf_unfiltered("register %d valid and read\n", regno);
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target_xfer_memory (sp + i - REGISTER_BYTE (L0_REGNUM),
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®isters[i], REGISTER_RAW_SIZE (regno), 0);
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register_valid[regno] = 1;
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}
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}
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/* Store our register values back into the inferior.
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If REGNO is -1, do this for all registers.
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Otherwise, REGNO specifies which register (so we can save time). */
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void
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store_inferior_registers (regno)
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int regno;
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{
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struct regs inferior_registers;
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struct fp_status inferior_fp_registers;
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int wanna_store = INT_REGS + STACK_REGS + FP_REGS;
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/* First decide which pieces of machine-state we need to modify.
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Default for regno == -1 case is all pieces. */
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if (regno >= 0)
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if (FP0_REGNUM <= regno && regno < FP0_REGNUM + 32)
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{
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wanna_store = FP_REGS;
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}
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else
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{
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if (regno == SP_REGNUM)
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wanna_store = INT_REGS + STACK_REGS;
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else if (regno < L0_REGNUM || regno > I7_REGNUM)
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wanna_store = INT_REGS;
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else
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wanna_store = STACK_REGS;
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}
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/* See if we're forcing the stores to happen now, or deferring. */
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if (regno == -2)
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{
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wanna_store = deferred_stores;
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deferred_stores = 0;
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}
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else
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{
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if (wanna_store == STACK_REGS)
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{
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/* Fall through and just store one stack reg. If we deferred
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it, we'd have to store them all, or remember more info. */
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}
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else
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{
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deferred_stores |= wanna_store;
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return;
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}
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}
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if (wanna_store & STACK_REGS)
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{
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CORE_ADDR sp = *(CORE_ADDR *)®isters[REGISTER_BYTE (SP_REGNUM)];
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if (regno < 0 || regno == SP_REGNUM)
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{
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if (!register_valid[L0_REGNUM+5]) abort();
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target_xfer_memory (sp,
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®isters[REGISTER_BYTE (L0_REGNUM)],
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16*REGISTER_RAW_SIZE (L0_REGNUM), 1);
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}
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else
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{
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if (!register_valid[regno]) abort();
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target_xfer_memory (sp + REGISTER_BYTE (regno) - REGISTER_BYTE (L0_REGNUM),
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®isters[REGISTER_BYTE (regno)],
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REGISTER_RAW_SIZE (regno), 1);
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}
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}
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if (wanna_store & INT_REGS)
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{
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if (!register_valid[G1_REGNUM]) abort();
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memcpy (&inferior_registers.r_g1, ®isters[REGISTER_BYTE (G1_REGNUM)],
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15 * REGISTER_RAW_SIZE (G1_REGNUM));
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inferior_registers.r_ps =
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*(int *)®isters[REGISTER_BYTE (PS_REGNUM)];
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inferior_registers.r_pc =
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*(int *)®isters[REGISTER_BYTE (PC_REGNUM)];
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inferior_registers.r_npc =
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*(int *)®isters[REGISTER_BYTE (NPC_REGNUM)];
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inferior_registers.r_y =
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*(int *)®isters[REGISTER_BYTE (Y_REGNUM)];
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if (0 != ptrace (PTRACE_SETREGS, inferior_pid,
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(PTRACE_ARG3_TYPE) &inferior_registers, 0))
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perror("ptrace_setregs");
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}
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if (wanna_store & FP_REGS)
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{
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if (!register_valid[FP0_REGNUM+9]) abort();
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/* Initialize inferior_fp_registers members that gdb doesn't set
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by reading them from the inferior. */
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if (0 !=
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ptrace (PTRACE_GETFPREGS, inferior_pid,
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(PTRACE_ARG3_TYPE) &inferior_fp_registers, 0))
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perror("ptrace_getfpregs");
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memcpy (&inferior_fp_registers, ®isters[REGISTER_BYTE (FP0_REGNUM)],
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sizeof inferior_fp_registers.fpu_fr);
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/* memcpy (&inferior_fp_registers.Fpu_fsr,
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®isters[REGISTER_BYTE (FPS_REGNUM)], sizeof (FPU_FSR_TYPE));
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****/
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if (0 !=
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ptrace (PTRACE_SETFPREGS, inferior_pid,
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(PTRACE_ARG3_TYPE) &inferior_fp_registers, 0))
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perror("ptrace_setfpregs");
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}
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}
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void
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fetch_core_registers (core_reg_sect, core_reg_size, which, ignore)
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char *core_reg_sect;
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unsigned core_reg_size;
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int which;
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unsigned int ignore; /* reg addr, unused in this version */
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{
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if (which == 0) {
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/* Integer registers */
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#define gregs ((struct regs *)core_reg_sect)
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/* G0 *always* holds 0. */
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*(int *)®isters[REGISTER_BYTE (0)] = 0;
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/* The globals and output registers. */
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memcpy (®isters[REGISTER_BYTE (G1_REGNUM)], &gregs->r_g1,
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15 * REGISTER_RAW_SIZE (G1_REGNUM));
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*(int *)®isters[REGISTER_BYTE (PS_REGNUM)] = gregs->r_ps;
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*(int *)®isters[REGISTER_BYTE (PC_REGNUM)] = gregs->r_pc;
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*(int *)®isters[REGISTER_BYTE (NPC_REGNUM)] = gregs->r_npc;
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*(int *)®isters[REGISTER_BYTE (Y_REGNUM)] = gregs->r_y;
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/* My best guess at where to get the locals and input
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registers is exactly where they usually are, right above
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the stack pointer. If the core dump was caused by a bus error
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from blowing away the stack pointer (as is possible) then this
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won't work, but it's worth the try. */
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{
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int sp;
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sp = *(int *)®isters[REGISTER_BYTE (SP_REGNUM)];
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if (0 != target_read_memory (sp, ®isters[REGISTER_BYTE (L0_REGNUM)],
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16 * REGISTER_RAW_SIZE (L0_REGNUM)))
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{
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/* fprintf_unfiltered so user can still use gdb */
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fprintf_unfiltered (gdb_stderr,
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"Couldn't read input and local registers from core file\n");
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}
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}
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} else if (which == 2) {
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/* Floating point registers */
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#define fpuregs ((struct fpu *) core_reg_sect)
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if (core_reg_size >= sizeof (struct fpu))
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{
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memcpy (®isters[REGISTER_BYTE (FP0_REGNUM)], fpuregs->fpu_regs,
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sizeof (fpuregs->fpu_regs));
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memcpy (®isters[REGISTER_BYTE (FPS_REGNUM)], &fpuregs->fpu_fsr,
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sizeof (FPU_FSR_TYPE));
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}
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else
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fprintf_unfiltered (gdb_stderr, "Couldn't read float regs from core file\n");
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}
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}
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