-/* Low level interface to ptrace, for the remote server for GDB.
- Copyright 1995, 1996, 1998, 1999, 2000, 2001, 2002
- 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 "server.h"
-#include <sys/wait.h>
-#include "frame.h"
-#include "inferior.h"
-
-#include <stdio.h>
-#include <sys/param.h>
-#include <sys/dir.h>
-#include <sys/ptrace.h>
-#include <sys/user.h>
-#include <signal.h>
-#include <sys/ioctl.h>
-#include <fcntl.h>
-
-/***************Begin MY defs*********************/
-static char my_registers[REGISTER_BYTES];
-char *registers = my_registers;
-/***************End MY defs*********************/
-
-#ifdef HAVE_SYS_REG_H
-#include <sys/reg.h>
-#endif
-
-/* Default the type of the ptrace transfer to int. */
-#ifndef PTRACE_XFER_TYPE
-#define PTRACE_XFER_TYPE int
-#endif
-
-extern int errno;
-
-static void initialize_arch (void);
-
-/* Start an inferior process and returns its pid.
- ALLARGS is a vector of program-name and args. */
-
-int
-create_inferior (char *program, char **allargs)
-{
- int pid;
-
- pid = fork ();
- if (pid < 0)
- perror_with_name ("fork");
-
- if (pid == 0)
- {
- ptrace (PTRACE_TRACEME, 0, 0, 0);
-
- execv (program, allargs);
-
- fprintf (stderr, "Cannot exec %s: %s.\n", program,
- errno < sys_nerr ? sys_errlist[errno] : "unknown error");
- fflush (stderr);
- _exit (0177);
- }
-
- return pid;
-}
-
-/* Attach to an inferior process. */
-
-int
-myattach (int pid)
-{
- if (ptrace (PTRACE_ATTACH, pid, 0, 0) != 0)
- {
- fprintf (stderr, "Cannot attach to process %d: %s (%d)\n", pid,
- errno < sys_nerr ? sys_errlist[errno] : "unknown error",
- errno);
- fflush (stderr);
- _exit (0177);
- }
-
- return 0;
-}
-
-/* Kill the inferior process. Make us have no inferior. */
-
-void
-kill_inferior (void)
-{
- if (inferior_pid == 0)
- return;
- ptrace (PTRACE_KILL, inferior_pid, 0, 0);
- wait (0);
-/*************inferior_died ();****VK**************/
-}
-
-/* Return nonzero if the given thread is still alive. */
-int
-mythread_alive (int pid)
-{
- return 1;
-}
-
-/* Wait for process, returns status */
-
-unsigned char
-mywait (char *status)
-{
- int pid;
- union wait w;
-
- enable_async_io ();
- pid = waitpid (inferior_pid, &w, 0);
- disable_async_io ();
- 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 (int step, int signal)
-{
- errno = 0;
- ptrace (step ? PTRACE_SINGLESTEP : PTRACE_CONT, inferior_pid, 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
-
-#ifdef I386_GNULINUX_TARGET
-/* This module only supports access to the general purpose registers.
- Adjust the relevant constants accordingly.
-
- FIXME: kettenis/2001-03-28: We should really use PTRACE_GETREGS to
- get at the registers. Better yet, we should try to share code with
- i386-linux-nat.c. */
-#undef NUM_FREGS
-#define NUM_FREGS 0
-#undef NUM_REGS
-#define NUM_REGS NUM_GREGS
-
-/* This stuff comes from i386-tdep.c. */
-
-/* i386_register_byte[i] is the offset into the register file of the
- start of register number i. We initialize this from
- i386_register_raw_size. */
-int i386_register_byte[MAX_NUM_REGS];
-
-/* i386_register_raw_size[i] is the number of bytes of storage in
- GDB's register array occupied by register i. */
-int i386_register_raw_size[MAX_NUM_REGS] = {
- 4, 4, 4, 4,
- 4, 4, 4, 4,
- 4, 4, 4, 4,
- 4, 4, 4, 4,
- 10, 10, 10, 10,
- 10, 10, 10, 10,
- 4, 4, 4, 4,
- 4, 4, 4, 4,
- 16, 16, 16, 16,
- 16, 16, 16, 16,
- 4
-};
-
-static void
-initialize_arch (void)
-{
- /* Initialize the table saying where each register starts in the
- register file. */
- {
- int i, offset;
-
- offset = 0;
- for (i = 0; i < MAX_NUM_REGS; i++)
- {
- i386_register_byte[i] = offset;
- offset += i386_register_raw_size[i];
- }
- }
-}
-
-/* This stuff comes from i386-linux-nat.c. */
-
-/* Mapping between the general-purpose registers in `struct user'
- format and GDB's register array layout. */
-static int regmap[] =
-{
- EAX, ECX, EDX, EBX,
- UESP, EBP, ESI, EDI,
- EIP, EFL, CS, SS,
- DS, ES, FS, GS
-};
-
-/* Return the address of register REGNUM. BLOCKEND is the value of
- u.u_ar0, which should point to the registers. */
-
-CORE_ADDR
-register_u_addr (CORE_ADDR blockend, int regnum)
-{
- return (blockend + 4 * regmap[regnum]);
-}
-#elif defined(TARGET_M68K)
-static void
-initialize_arch (void)
-{
- return;
-}
-
-/* This table must line up with REGISTER_NAMES in tm-m68k.h */
-static int regmap[] =
-{
-#ifdef PT_D0
- PT_D0, PT_D1, PT_D2, PT_D3, PT_D4, PT_D5, PT_D6, PT_D7,
- PT_A0, PT_A1, PT_A2, PT_A3, PT_A4, PT_A5, PT_A6, PT_USP,
- PT_SR, PT_PC,
-#else
- 14, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15,
- 17, 18,
-#endif
-#ifdef PT_FP0
- PT_FP0, PT_FP1, PT_FP2, PT_FP3, PT_FP4, PT_FP5, PT_FP6, PT_FP7,
- PT_FPCR, PT_FPSR, PT_FPIAR
-#else
- 21, 24, 27, 30, 33, 36, 39, 42, 45, 46, 47
-#endif
-};
-
-/* BLOCKEND is the value of u.u_ar0, and points to the place where GS
- is stored. */
-
-int
-m68k_linux_register_u_addr (int blockend, int regnum)
-{
- return (blockend + 4 * regmap[regnum]);
-}
-#elif defined(IA64_GNULINUX_TARGET)
-#undef NUM_FREGS
-#define NUM_FREGS 0
-
-#include <asm/ptrace_offsets.h>
-
-static int u_offsets[] =
- {
- /* general registers */
- -1, /* gr0 not available; i.e, it's always zero */
- PT_R1,
- PT_R2,
- PT_R3,
- PT_R4,
- PT_R5,
- PT_R6,
- PT_R7,
- PT_R8,
- PT_R9,
- PT_R10,
- PT_R11,
- PT_R12,
- PT_R13,
- PT_R14,
- PT_R15,
- PT_R16,
- PT_R17,
- PT_R18,
- PT_R19,
- PT_R20,
- PT_R21,
- PT_R22,
- PT_R23,
- PT_R24,
- PT_R25,
- PT_R26,
- PT_R27,
- PT_R28,
- PT_R29,
- PT_R30,
- PT_R31,
- /* gr32 through gr127 not directly available via the ptrace interface */
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
- /* Floating point registers */
- -1, -1, /* f0 and f1 not available (f0 is +0.0 and f1 is +1.0) */
- PT_F2,
- PT_F3,
- PT_F4,
- PT_F5,
- PT_F6,
- PT_F7,
- PT_F8,
- PT_F9,
- PT_F10,
- PT_F11,
- PT_F12,
- PT_F13,
- PT_F14,
- PT_F15,
- PT_F16,
- PT_F17,
- PT_F18,
- PT_F19,
- PT_F20,
- PT_F21,
- PT_F22,
- PT_F23,
- PT_F24,
- PT_F25,
- PT_F26,
- PT_F27,
- PT_F28,
- PT_F29,
- PT_F30,
- PT_F31,
- PT_F32,
- PT_F33,
- PT_F34,
- PT_F35,
- PT_F36,
- PT_F37,
- PT_F38,
- PT_F39,
- PT_F40,
- PT_F41,
- PT_F42,
- PT_F43,
- PT_F44,
- PT_F45,
- PT_F46,
- PT_F47,
- PT_F48,
- PT_F49,
- PT_F50,
- PT_F51,
- PT_F52,
- PT_F53,
- PT_F54,
- PT_F55,
- PT_F56,
- PT_F57,
- PT_F58,
- PT_F59,
- PT_F60,
- PT_F61,
- PT_F62,
- PT_F63,
- PT_F64,
- PT_F65,
- PT_F66,
- PT_F67,
- PT_F68,
- PT_F69,
- PT_F70,
- PT_F71,
- PT_F72,
- PT_F73,
- PT_F74,
- PT_F75,
- PT_F76,
- PT_F77,
- PT_F78,
- PT_F79,
- PT_F80,
- PT_F81,
- PT_F82,
- PT_F83,
- PT_F84,
- PT_F85,
- PT_F86,
- PT_F87,
- PT_F88,
- PT_F89,
- PT_F90,
- PT_F91,
- PT_F92,
- PT_F93,
- PT_F94,
- PT_F95,
- PT_F96,
- PT_F97,
- PT_F98,
- PT_F99,
- PT_F100,
- PT_F101,
- PT_F102,
- PT_F103,
- PT_F104,
- PT_F105,
- PT_F106,
- PT_F107,
- PT_F108,
- PT_F109,
- PT_F110,
- PT_F111,
- PT_F112,
- PT_F113,
- PT_F114,
- PT_F115,
- PT_F116,
- PT_F117,
- PT_F118,
- PT_F119,
- PT_F120,
- PT_F121,
- PT_F122,
- PT_F123,
- PT_F124,
- PT_F125,
- PT_F126,
- PT_F127,
- /* predicate registers - we don't fetch these individually */
- -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1,
- /* branch registers */
- PT_B0,
- PT_B1,
- PT_B2,
- PT_B3,
- PT_B4,
- PT_B5,
- PT_B6,
- PT_B7,
- /* virtual frame pointer and virtual return address pointer */
- -1, -1,
- /* other registers */
- PT_PR,
- PT_CR_IIP, /* ip */
- PT_CR_IPSR, /* psr */
- PT_CFM, /* cfm */
- /* kernel registers not visible via ptrace interface (?) */
- -1, -1, -1, -1, -1, -1, -1, -1,
- /* hole */
- -1, -1, -1, -1, -1, -1, -1, -1,
- PT_AR_RSC,
- PT_AR_BSP,
- PT_AR_BSPSTORE,
- PT_AR_RNAT,
- -1,
- -1, /* Not available: FCR, IA32 floating control register */
- -1, -1,
- -1, /* Not available: EFLAG */
- -1, /* Not available: CSD */
- -1, /* Not available: SSD */
- -1, /* Not available: CFLG */
- -1, /* Not available: FSR */
- -1, /* Not available: FIR */
- -1, /* Not available: FDR */
- -1,
- PT_AR_CCV,
- -1, -1, -1,
- PT_AR_UNAT,
- -1, -1, -1,
- PT_AR_FPSR,
- -1, -1, -1,
- -1, /* Not available: ITC */
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1, -1,
- PT_AR_PFS,
- PT_AR_LC,
- -1, /* Not available: EC, the Epilog Count register */
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
- -1,
- /* nat bits - not fetched directly; instead we obtain these bits from
- either rnat or unat or from memory. */
- -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1,
- };
-
-int
-ia64_register_u_addr (int blockend, int regnum)
-{
- int addr;
-
- if (regnum < 0 || regnum >= NUM_REGS)
- error ("Invalid register number %d.", regnum);
-
- addr = u_offsets[regnum];
- if (addr == -1)
- addr = 0;
-
- return addr;
-}
-
-static void
-initialize_arch (void)
-{
- return;
-}
-
-#elif defined(ARM_GNULINUX_TARGET)
-int arm_register_u_addr(blockend, regnum)
- int blockend;
- int regnum;
-{
- return blockend + REGISTER_BYTE(regnum);
-}
-
-static void
-initialize_arch ()
-{
-}
-#endif
-
-CORE_ADDR
-register_addr (int regno, CORE_ADDR blockend)
-{
- CORE_ADDR addr;
-
- if (regno < 0 || regno >= NUM_REGS)
- error ("Invalid register number %d.", regno);
-
- REGISTER_U_ADDR (addr, blockend, regno);
-
- return addr;
-}
-
-/* Fetch one register. */
-
-static void
-fetch_register (int regno)
-{
- CORE_ADDR regaddr;
- 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 (PTRACE_XFER_TYPE))
- {
- errno = 0;
- *(PTRACE_XFER_TYPE *) ®isters[REGISTER_BYTE (regno) + i] =
- ptrace (PTRACE_PEEKUSER, inferior_pid, (PTRACE_ARG3_TYPE) regaddr, 0);
- regaddr += sizeof (PTRACE_XFER_TYPE);
- 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 (int regno)
-{
- if (regno == -1 || regno == 0)
- for (regno = 0; regno < NUM_REGS - NUM_FREGS; 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 (int regno)
-{
- CORE_ADDR regaddr;
- int i;
- unsigned int offset = U_REGS_OFFSET;
-
- if (regno >= 0)
- {
-#if 0
- if (CANNOT_STORE_REGISTER (regno))
- return;
-#endif
- regaddr = register_addr (regno, offset);
- errno = 0;
-#if 0
- if (regno == PCOQ_HEAD_REGNUM || regno == PCOQ_TAIL_REGNUM)
- {
- scratch = *(int *) ®isters[REGISTER_BYTE (regno)] | 0x3;
- ptrace (PT_WUREGS, inferior_pid, (PTRACE_ARG3_TYPE) regaddr,
- scratch, 0);
- if (errno != 0)
- {
- /* Error, even if attached. Failing to write these two
- registers is pretty serious. */
- sprintf (buf, "writing register number %d", regno);
- perror_with_name (buf);
- }
- }
- else
-#endif
- for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
- {
- errno = 0;
- ptrace (PTRACE_POKEUSER, inferior_pid, (PTRACE_ARG3_TYPE) regaddr,
- *(int *) ®isters[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 - NUM_FREGS; 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. */
-
-void
-read_inferior_memory (CORE_ADDR memaddr, char *myaddr, int len)
-{
- register int i;
- /* Round starting address down to longword boundary. */
- register CORE_ADDR addr = memaddr & -(CORE_ADDR) sizeof (PTRACE_XFER_TYPE);
- /* Round ending address up; get number of longwords that makes. */
- register int count
- = (((memaddr + len) - addr) + sizeof (PTRACE_XFER_TYPE) - 1)
- / sizeof (PTRACE_XFER_TYPE);
- /* Allocate buffer of that many longwords. */
- register PTRACE_XFER_TYPE *buffer
- = (PTRACE_XFER_TYPE *) alloca (count * sizeof (PTRACE_XFER_TYPE));
-
- /* Read all the longwords */
- for (i = 0; i < count; i++, addr += sizeof (PTRACE_XFER_TYPE))
- {
- buffer[i] = ptrace (PTRACE_PEEKTEXT, inferior_pid, addr, 0);
- }
-
- /* Copy appropriate bytes out of the buffer. */
- memcpy (myaddr, (char *) buffer + (memaddr & (sizeof (PTRACE_XFER_TYPE) - 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 (CORE_ADDR memaddr, char *myaddr, int len)
-{
- register int i;
- /* Round starting address down to longword boundary. */
- register CORE_ADDR addr = memaddr & -(CORE_ADDR) sizeof (PTRACE_XFER_TYPE);
- /* Round ending address up; get number of longwords that makes. */
- register int count
- = (((memaddr + len) - addr) + sizeof (PTRACE_XFER_TYPE) - 1) / sizeof (PTRACE_XFER_TYPE);
- /* Allocate buffer of that many longwords. */
- register PTRACE_XFER_TYPE *buffer = (PTRACE_XFER_TYPE *) alloca (count * sizeof (PTRACE_XFER_TYPE));
- extern int errno;
-
- /* Fill start and end extra bytes of buffer with existing memory data. */
-
- buffer[0] = ptrace (PTRACE_PEEKTEXT, inferior_pid, addr, 0);
-
- if (count > 1)
- {
- buffer[count - 1]
- = ptrace (PTRACE_PEEKTEXT, inferior_pid,
- addr + (count - 1) * sizeof (PTRACE_XFER_TYPE), 0);
- }
-
- /* Copy data to be written over corresponding part of buffer */
-
- memcpy ((char *) buffer + (memaddr & (sizeof (PTRACE_XFER_TYPE) - 1)), myaddr, len);
-
- /* Write the entire buffer. */
-
- for (i = 0; i < count; i++, addr += sizeof (PTRACE_XFER_TYPE))
- {
- errno = 0;
- ptrace (PTRACE_POKETEXT, inferior_pid, addr, buffer[i]);
- if (errno)
- return errno;
- }
-
- return 0;
-}
-\f
-void
-initialize_low (void)
-{
- initialize_arch ();
-}
projects / thirdparty / binutils-gdb.git / commitdiff
