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https://sourceware.org/git/binutils-gdb.git
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Sparc version of remote-inflow.c. Hasn't been made portable yet.
This commit is contained in:
Stu Grossman
parent
b8f64f2068
commit
799d5b6a5b
451
gdb/gdbserver/remote-inflow-sparc.c
Normal file
451
gdb/gdbserver/remote-inflow-sparc.c
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@ -0,0 +1,451 @@
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/* Low level interface to ptrace, for GDB when running under Unix.
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Copyright (C) 1986, 1987 Free Software Foundation, Inc.
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*/
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#include "defs.h"
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#include "wait.h"
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#include "frame.h"
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#include "inferior.h"
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/***************************
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#include "initialize.h"
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****************************/
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#include <stdio.h>
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#include <sys/param.h>
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#include <sys/dir.h>
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#include <sys/user.h>
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#include <signal.h>
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#include <sys/ioctl.h>
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#include <sgtty.h>
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#include <fcntl.h>
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/***************Begin MY defs*********************/
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int quit_flag = 0;
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char registers[REGISTER_BYTES];
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/* Index within `registers' of the first byte of the space for
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register N. */
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char buf2[MAX_REGISTER_RAW_SIZE];
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/***************End MY defs*********************/
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#include <sys/ptrace.h>
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#include <machine/reg.h>
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extern char **environ;
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extern int errno;
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extern int inferior_pid;
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void error (), quit (), perror_with_name ();
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int query ();
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void supply_register (), write_register ();
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CORE_ADDR read_register ();
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/* Nonzero if we are debugging an attached outside process
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rather than an inferior. */
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/* Start an inferior process and returns its pid.
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ALLARGS is a vector of program-name and args.
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ENV is the environment vector to pass. */
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int
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create_inferior (allargs, env)
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char **allargs;
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char **env;
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{
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int pid;
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extern int sys_nerr;
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extern char *sys_errlist[];
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extern int errno;
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char status;
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char execbuf[1024];
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/* exec is said to fail if the executable is open. */
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/****************close_exec_file ();*****************/
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sprintf (execbuf, "exec %s", allargs);
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pid = vfork ();
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if (pid < 0)
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perror_with_name ("vfork");
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if (pid == 0)
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{
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/* Run inferior in a separate process group. */
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setpgrp (getpid (), getpid ());
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errno = 0;
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ptrace (PTRACE_TRACEME);
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execle ("/bin/sh", "sh", "-c", execbuf, 0, env);
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fprintf (stderr, "Cannot exec /bin/sh: %s.\n",
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errno < sys_nerr ? sys_errlist[errno] : "unknown error");
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fflush (stderr);
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_exit (0177);
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}
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return pid;
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}
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/* Kill the inferior process. Make us have no inferior. */
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void
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kill_inferior ()
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{
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if (inferior_pid == 0)
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return;
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ptrace (8, inferior_pid, 0, 0);
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wait (0);
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/*************inferior_died ();****VK**************/
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}
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/* Resume execution of the inferior process.
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If STEP is nonzero, single-step it.
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If SIGNAL is nonzero, give it that signal. */
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unsigned char
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myresume (step, signal, status)
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int step;
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int signal;
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char *status;
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{
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int pid;
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WAITTYPE w;
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errno = 0;
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ptrace (step ? 9 : 7, inferior_pid, 1, signal);
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if (errno)
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perror_with_name ("ptrace");
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pid = wait (&w);
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if (pid != inferior_pid)
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perror_with_name ("wait");
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fetch_inferior_registers (0);
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if (WIFEXITED (w))
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{
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printf ("\nChild exited with retcode = %x \n", WEXITSTATUS (w));
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*status = 'E';
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return ((unsigned char) WEXITSTATUS (w));
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}
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else if (!WIFSTOPPED (w))
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{
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printf ("\nChild terminated with signal = %x \n", WTERMSIG (w));
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*status = 'T';
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return ((unsigned char) WTERMSIG (w));
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}
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else
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{
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printf ("\nChild stopped with signal = %x \n", WSTOPSIG (w));
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*status = 'S';
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return ((unsigned char) WSTOPSIG (w));
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}
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}
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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 (ignored)
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int ignored;
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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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/* 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 (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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/* Floating point registers */
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if (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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/* 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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read_inferior_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));
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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 (ignored)
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int ignored;
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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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CORE_ADDR sp = *(CORE_ADDR *)®isters[REGISTER_BYTE (SP_REGNUM)];
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write_inferior_memory (sp, ®isters[REGISTER_BYTE (L0_REGNUM)],
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16*REGISTER_RAW_SIZE (L0_REGNUM));
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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 (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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memcpy (&inferior_fp_registers, ®isters[REGISTER_BYTE (FP0_REGNUM)],
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sizeof inferior_fp_registers.fpu_fr);
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if (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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#if 0
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void
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fetch_inferior_registers ()
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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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extern char registers[];
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ptrace (PTRACE_GETREGS, inferior_pid, &inferior_registers);
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if (errno)
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perror_with_name ("ptrace");
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/**********debugging begin **********/
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print_some_registers (&inferior_registers);
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/**********debugging end **********/
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ptrace (PTRACE_GETFPREGS, inferior_pid, &inferior_fp_registers);
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if (errno)
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perror_with_name ("ptrace");
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bcopy (&inferior_registers, registers, 16 * 4);
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bcopy (&inferior_fp_registers, ®isters[REGISTER_BYTE (FP0_REGNUM)],
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sizeof inferior_fp_registers.fpu_regs);
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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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bcopy (&inferior_fp_registers.fpu_flags,
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®isters[REGISTER_BYTE (FPC_REGNUM)],
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sizeof inferior_fp_registers - sizeof inferior_fp_registers.fpu_regs);
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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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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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extern char registers[];
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bcopy (registers, &inferior_registers, 16 * 4);
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bcopy (®isters[REGISTER_BYTE (FP0_REGNUM)], &inferior_fp_registers,
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sizeof inferior_fp_registers.fps_regs);
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inferior_registers.r_ps = *(int *) ®isters[REGISTER_BYTE (PS_REGNUM)];
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inferior_registers.r_pc = *(int *) ®isters[REGISTER_BYTE (PC_REGNUM)];
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bcopy (®isters[REGISTER_BYTE (FPC_REGNUM)],
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&inferior_fp_registers.fps_control,
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sizeof inferior_fp_registers - sizeof inferior_fp_registers.fps_regs);
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ptrace (PTRACE_SETREGS, inferior_pid, &inferior_registers);
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if (errno)
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perror_with_name ("ptrace");
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ptrace (PTRACE_SETFPREGS, inferior_pid, &inferior_fp_registers);
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if (errno)
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perror_with_name ("ptrace");
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}
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#endif /* 0 */
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/* NOTE! I tried using PTRACE_READDATA, etc., to read and write memory
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in the NEW_SUN_PTRACE case.
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It ought to be straightforward. But it appears that writing did
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not write the data that I specified. I cannot understand where
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it got the data that it actually did write. */
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/* Copy LEN bytes from inferior's memory starting at MEMADDR
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to debugger memory starting at MYADDR. */
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read_inferior_memory (memaddr, myaddr, len)
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CORE_ADDR memaddr;
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char *myaddr;
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int len;
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{
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register int i;
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/* Round starting address down to longword boundary. */
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register CORE_ADDR addr = memaddr & -sizeof (int);
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/* Round ending address up; get number of longwords that makes. */
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register int count
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= (((memaddr + len) - addr) + sizeof (int) - 1) / sizeof (int);
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/* Allocate buffer of that many longwords. */
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register int *buffer = (int *) alloca (count * sizeof (int));
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/* Read all the longwords */
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for (i = 0; i < count; i++, addr += sizeof (int))
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{
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buffer[i] = ptrace (1, inferior_pid, addr, 0);
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}
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/* Copy appropriate bytes out of the buffer. */
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bcopy ((char *) buffer + (memaddr & (sizeof (int) - 1)), myaddr, len);
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}
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/* Copy LEN bytes of data from debugger memory at MYADDR
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to inferior's memory at MEMADDR.
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On failure (cannot write the inferior)
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returns the value of errno. */
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int
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write_inferior_memory (memaddr, myaddr, len)
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CORE_ADDR memaddr;
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char *myaddr;
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int len;
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{
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register int i;
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/* Round starting address down to longword boundary. */
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register CORE_ADDR addr = memaddr & -sizeof (int);
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/* Round ending address up; get number of longwords that makes. */
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register int count
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= (((memaddr + len) - addr) + sizeof (int) - 1) / sizeof (int);
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/* Allocate buffer of that many longwords. */
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register int *buffer = (int *) alloca (count * sizeof (int));
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extern int errno;
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/* Fill start and end extra bytes of buffer with existing memory data. */
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buffer[0] = ptrace (1, inferior_pid, addr, 0);
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if (count > 1)
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{
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buffer[count - 1]
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= ptrace (1, inferior_pid,
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addr + (count - 1) * sizeof (int), 0);
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}
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/* Copy data to be written over corresponding part of buffer */
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bcopy (myaddr, (char *) buffer + (memaddr & (sizeof (int) - 1)), len);
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/* Write the entire buffer. */
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for (i = 0; i < count; i++, addr += sizeof (int))
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{
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errno = 0;
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ptrace (4, inferior_pid, addr, buffer[i]);
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if (errno)
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return errno;
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}
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return 0;
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}
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void
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try_writing_regs_command ()
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{
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register int i;
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register int val;
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if (inferior_pid == 0)
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error ("There is no inferior process now.");
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fetch_inferior_registers (0);
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for (i = 0; i < 18; i++)
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{
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QUIT;
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errno = 0;
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val = read_register (i);
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write_register (i, val);
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if (errno == 0)
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{
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printf (" Succeeded with register %d; value 0x%x (%d).\n",
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i, val, val);
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}
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else
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printf (" Failed with register %d.\n", i);
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}
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}
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void
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initialize ()
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{
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inferior_pid = 0;
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}
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/* Return the contents of register REGNO,
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regarding it as an integer. */
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CORE_ADDR
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read_register (regno)
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int regno;
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{
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/* This loses when REGISTER_RAW_SIZE (regno) != sizeof (int) */
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return *(int *) ®isters[REGISTER_BYTE (regno)];
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}
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/* Store VALUE in the register number REGNO, regarded as an integer. */
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void
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write_register (regno, val)
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int regno, val;
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{
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/* This loses when REGISTER_RAW_SIZE (regno) != sizeof (int) */
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*(int *) ®isters[REGISTER_BYTE (regno)] = val;
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if (have_inferior_p ())
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store_inferior_registers (regno);
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}
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int
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have_inferior_p ()
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{
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return inferior_pid != 0;
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}
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print_some_registers (regs)
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int regs[];
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{
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register int i;
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for (i = 0; i < 18; i++)
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{
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printf ("reg[%d] = %x\n", i, regs[i]);
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}
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}
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