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authorpst <pst@FreeBSD.org>1997-04-25 22:25:50 +0000
committerpst <pst@FreeBSD.org>1997-04-25 22:25:50 +0000
commit8f80b72f50a457ab733635e070cb5a2c79c52f3d (patch)
tree6b1f65f261d8ef79a7d34d6707b8e777036c238e /gnu
parent42958a4686f615ba9cd6635f9237ded9385777e4 (diff)
downloadFreeBSD-src-8f80b72f50a457ab733635e070cb5a2c79c52f3d.zip
FreeBSD-src-8f80b72f50a457ab733635e070cb5a2c79c52f3d.tar.gz
Initial import of gdbserver FreeBSD support
Diffstat (limited to 'gnu')
-rw-r--r--gnu/usr.bin/binutils/gdbserver/Makefile17
-rw-r--r--gnu/usr.bin/binutils/gdbserver/low-fbsd.c433
2 files changed, 450 insertions, 0 deletions
diff --git a/gnu/usr.bin/binutils/gdbserver/Makefile b/gnu/usr.bin/binutils/gdbserver/Makefile
new file mode 100644
index 0000000..acac9e0
--- /dev/null
+++ b/gnu/usr.bin/binutils/gdbserver/Makefile
@@ -0,0 +1,17 @@
+# $Id: Makefile,v 1.13.2.1 1997/02/02 20:46:32 joerg Exp $
+
+GDBDIR= ${.CURDIR}/../../../../contrib/gdb
+.PATH: ${GDBDIR}/gdb/gdbserver
+.PATH: ${GDBDIR}/gdb
+.PATH: ${GDBDIR}/opcodes
+
+PROG= gdbserver
+BINDIR= /usr/bin
+
+SRCS= remote-utils.c utils.c server.c
+SRCS+= low-fbsd.c
+
+CFLAGS+=-I${.CURDIR}/../gdb -I${.CURDIR}/../bfd -I${GDBDIR}/gdb -I${GDBDIR}/bfd
+CFLAGS+=-DNO_MMALLOC
+
+.include <bsd.prog.mk>
diff --git a/gnu/usr.bin/binutils/gdbserver/low-fbsd.c b/gnu/usr.bin/binutils/gdbserver/low-fbsd.c
new file mode 100644
index 0000000..0874e1b
--- /dev/null
+++ b/gnu/usr.bin/binutils/gdbserver/low-fbsd.c
@@ -0,0 +1,433 @@
+/* Low level interface to ptrace, for the remote server for GDB.
+ Copyright (C) 1995 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 <sys/wait.h>
+#include "frame.h"
+#include "inferior.h"
+
+#include <stdio.h>
+#include <sys/param.h>
+#include <sys/dir.h>
+#include <sys/user.h>
+#include <signal.h>
+#include <sys/ioctl.h>
+#include <sgtty.h>
+#include <fcntl.h>
+
+/***************Begin MY defs*********************/
+int quit_flag = 0;
+char registers[REGISTER_BYTES];
+
+/* Index within `registers' of the first byte of the space for
+ register N. */
+
+
+char buf2[MAX_REGISTER_RAW_SIZE];
+/***************End MY defs*********************/
+
+#include <sys/ptrace.h>
+#include <machine/reg.h>
+
+extern char **environ;
+extern int inferior_pid;
+void quit (), perror_with_name ();
+int query ();
+
+/* Start an inferior process and returns its pid.
+ ALLARGS is a vector of program-name and args.
+ ENV is the environment vector to pass. */
+
+int
+create_inferior (program, allargs)
+ char *program;
+ char **allargs;
+{
+ int pid;
+
+ pid = fork ();
+ if (pid < 0)
+ perror_with_name ("fork");
+
+ if (pid == 0)
+ {
+ ptrace (PT_TRACE_ME, 0, 0, 0);
+
+ execv (program, allargs);
+
+ fprintf (stderr, "Cannot exec %s: %s.\n", program, strerror(errno));
+ fflush (stderr);
+ _exit (0177);
+ }
+
+ return pid;
+}
+
+/* Kill the inferior process. Make us have no inferior. */
+
+void
+kill_inferior ()
+{
+ if (inferior_pid == 0)
+ return;
+ ptrace (PT_KILL, inferior_pid, 0, 0);
+ wait (0);
+ /*************inferior_died ();****VK**************/
+}
+
+/* Return nonzero if the given thread is still alive. */
+int
+mythread_alive (pid)
+ int pid;
+{
+ return 1;
+}
+
+/* Wait for process, returns status */
+
+unsigned char
+mywait (status)
+ char *status;
+{
+ int pid;
+ int w;
+
+ pid = wait (&w);
+ if (pid != inferior_pid)
+ perror_with_name ("wait");
+
+ if (WIFEXITED (w))
+ {
+ fprintf (stderr, "\nChild exited with retcode = %x \n", WEXITSTATUS (w));
+ *status = 'W';
+ return ((unsigned char) WEXITSTATUS (w));
+ }
+ else if (!WIFSTOPPED (w))
+ {
+ fprintf (stderr, "\nChild terminated with signal = %x \n", WTERMSIG (w));
+ *status = 'X';
+ return ((unsigned char) WTERMSIG (w));
+ }
+
+ fetch_inferior_registers (0);
+
+ *status = 'T';
+ return ((unsigned char) WSTOPSIG (w));
+}
+
+/* Resume execution of the inferior process.
+ If STEP is nonzero, single-step it.
+ If SIGNAL is nonzero, give it that signal. */
+
+void
+myresume (step, signal)
+ int step;
+ int signal;
+{
+ errno = 0;
+ ptrace (step ? PT_STEP : PT_CONTINUE, inferior_pid,
+ (PTRACE_ARG3_TYPE) 1, signal);
+ if (errno)
+ perror_with_name ("ptrace");
+}
+
+
+#if !defined (offsetof)
+#define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER)
+#endif
+
+/* U_REGS_OFFSET is the offset of the registers within the u area. */
+#if !defined (U_REGS_OFFSET)
+#define U_REGS_OFFSET \
+ ptrace (PT_READ_U, inferior_pid, \
+ (PTRACE_ARG3_TYPE) (offsetof (struct user, u_ar0)), 0) \
+ - KERNEL_U_ADDR
+#endif
+
+unsigned int
+register_addr (regno, blockend)
+ int regno;
+ int blockend;
+{
+ int addr;
+
+ if (regno < 0 || regno >= ARCH_NUM_REGS)
+ error ("Invalid register number %d.", regno);
+
+ REGISTER_U_ADDR (addr, blockend, regno);
+
+ return addr;
+}
+
+/* Fetch one register. */
+
+static void
+fetch_register (regno)
+ int regno;
+{
+ register unsigned int regaddr;
+ char buf[MAX_REGISTER_RAW_SIZE];
+ register int i;
+
+ /* Offset of registers within the u area. */
+ unsigned int offset;
+
+ offset = U_REGS_OFFSET;
+
+ regaddr = register_addr (regno, offset);
+ for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
+ {
+ errno = 0;
+ *(int *) &registers[ regno * sizeof(int) + i] =
+ ptrace (PT_READ_U, inferior_pid, (PTRACE_ARG3_TYPE) regaddr, 0);
+ regaddr += sizeof (int);
+ if (errno != 0)
+ {
+ /* Warning, not error, in case we are attached; sometimes the
+ kernel doesn't let us at the registers. */
+ char *err = strerror (errno);
+ char *msg = alloca (strlen (err) + 128);
+ sprintf (msg, "reading register %d: %s", regno, err);
+ error (msg);
+ goto error_exit;
+ }
+ }
+ error_exit:;
+}
+
+/* Fetch all registers, or just one, from the child process. */
+
+void
+fetch_inferior_registers (regno)
+ int regno;
+{
+ if (regno == -1 || regno == 0)
+ for (regno = 0; regno < NUM_REGS; regno++)
+ fetch_register (regno);
+ else
+ fetch_register (regno);
+}
+
+/* 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;
+{
+ register unsigned int regaddr;
+ char buf[80];
+ extern char registers[];
+ register int i;
+ unsigned int offset = U_REGS_OFFSET;
+ int scratch;
+
+ if (regno >= 0)
+ {
+ regaddr = register_addr (regno, offset);
+ errno = 0;
+ for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof(int))
+ {
+ errno = 0;
+ ptrace (PT_WRITE_U, inferior_pid, (PTRACE_ARG3_TYPE) regaddr,
+ *(int *) &registers[REGISTER_BYTE (regno) + i]);
+ if (errno != 0)
+ {
+ /* Warning, not error, in case we are attached; sometimes the
+ kernel doesn't let us at the registers. */
+ char *err = strerror (errno);
+ char *msg = alloca (strlen (err) + 128);
+ sprintf (msg, "writing register %d: %s",
+ regno, err);
+ error (msg);
+ return;
+ }
+ regaddr += sizeof(int);
+ }
+ }
+ else
+ for (regno = 0; regno < NUM_REGS; regno++)
+ store_inferior_registers (regno);
+}
+
+/* NOTE! I tried using PTRACE_READDATA, etc., to read and write memory
+ in the NEW_SUN_PTRACE case.
+ It ought to be straightforward. But it appears that writing did
+ not write the data that I specified. I cannot understand where
+ it got the data that it actually did write. */
+
+/* Copy LEN bytes from inferior's memory starting at MEMADDR
+ to debugger memory starting at MYADDR. */
+
+read_inferior_memory (memaddr, myaddr, len)
+ CORE_ADDR memaddr;
+ char *myaddr;
+ int len;
+{
+ register int i;
+ /* Round starting address down to longword boundary. */
+ register CORE_ADDR addr = memaddr & -sizeof (int);
+ /* Round ending address up; get number of longwords that makes. */
+ register int count
+ = (((memaddr + len) - addr) + sizeof (int) - 1) / sizeof (int);
+ /* Allocate buffer of that many longwords. */
+ register int *buffer = (int *) alloca (count * sizeof (int));
+
+ /* Read all the longwords */
+ for (i = 0; i < count; i++, addr += sizeof (int))
+ {
+ buffer[i] = ptrace (PT_READ_I, inferior_pid, (PTRACE_ARG3_TYPE) addr, 0);
+ }
+
+ /* Copy appropriate bytes out of the buffer. */
+ memcpy (myaddr, (char *) buffer + (memaddr & (sizeof (int) - 1)), len);
+}
+
+/* Copy LEN bytes of data from debugger memory at MYADDR
+ to inferior's memory at MEMADDR.
+ On failure (cannot write the inferior)
+ returns the value of errno. */
+
+int
+write_inferior_memory (memaddr, myaddr, len)
+ CORE_ADDR memaddr;
+ char *myaddr;
+ int len;
+{
+ register int i;
+ /* Round starting address down to longword boundary. */
+ register CORE_ADDR addr = memaddr & -sizeof (int);
+ /* Round ending address up; get number of longwords that makes. */
+ register int count
+ = (((memaddr + len) - addr) + sizeof (int) - 1) / sizeof (int);
+ /* Allocate buffer of that many longwords. */
+ register int *buffer = (int *) alloca (count * sizeof (int));
+ extern int errno;
+
+ /* Fill start and end extra bytes of buffer with existing memory data. */
+
+ buffer[0] = ptrace (PT_READ_I, inferior_pid,
+ (PTRACE_ARG3_TYPE) addr, 0);
+
+ if (count > 1)
+ {
+ buffer[count - 1]
+ = ptrace (PT_READ_I, inferior_pid,
+ (PTRACE_ARG3_TYPE) addr + (count - 1) * sizeof (int), 0);
+ }
+
+ /* Copy data to be written over corresponding part of buffer */
+
+ memcpy ((char *) buffer + (memaddr & (sizeof (int) - 1)), myaddr, len);
+
+ /* Write the entire buffer. */
+
+ for (i = 0; i < count; i++, addr += sizeof (int))
+ {
+ errno = 0;
+ ptrace (PT_WRITE_I, inferior_pid, (PTRACE_ARG3_TYPE) addr, buffer[i]);
+ if (errno)
+ return errno;
+ }
+
+ return 0;
+}
+
+void
+initialize ()
+{
+ inferior_pid = 0;
+}
+
+int
+have_inferior_p ()
+{
+ return inferior_pid != 0;
+}
+
+/* Some systems don't provide all the registers on a trap. Use SS as a
+ default if so. */
+
+#ifndef tDS
+#define tDS tSS
+#endif
+#ifndef tES
+#define tES tSS
+#endif
+#ifndef tFS
+#define tFS tSS
+#endif
+#ifndef tGS
+#define tGS tSS
+#endif
+
+/* These tables map between the registers on a trap frame, and the register
+ order used by the rest of GDB. */
+/* this table must line up with REGISTER_NAMES in tm-i386.h */
+/* symbols like 'tEAX' come from <machine/reg.h> */
+static int tregmap[] =
+{
+ tEAX, tECX, tEDX, tEBX,
+ tESP, tEBP, tESI, tEDI,
+ tEIP, tEFLAGS, tCS, tSS,
+ tDS, tES, tFS, tGS
+};
+
+#ifdef sEAX
+static int sregmap[] =
+{
+ sEAX, sECX, sEDX, sEBX,
+ sESP, sEBP, sESI, sEDI,
+ sEIP, sEFLAGS, sCS, sSS
+};
+#else /* No sEAX */
+
+/* FreeBSD has decided to collapse the s* and t* symbols. So if the s*
+ ones aren't around, use the t* ones for sregmap too. */
+
+static int sregmap[] =
+{
+ tEAX, tECX, tEDX, tEBX,
+ tESP, tEBP, tESI, tEDI,
+ tEIP, tEFLAGS, tCS, tSS,
+ tDS, tES, tFS, tGS
+};
+#endif /* No sEAX */
+
+/* blockend is the value of u.u_ar0, and points to the
+ place where ES is stored. */
+
+int
+i386_register_u_addr (blockend, regnum)
+ int blockend;
+ int regnum;
+{
+ /* The following condition is a kludge to get at the proper register map
+ depending upon the state of pcb_flag.
+ The proper condition would be
+ if (u.u_pcb.pcb_flag & FM_TRAP)
+ but that would require a ptrace call here and wouldn't work
+ for corefiles. */
+
+ if (blockend < 0x1fcc)
+ return (blockend + 4 * tregmap[regnum]);
+ else
+ return (blockend + 4 * sregmap[regnum]);
+}
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