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Diffstat (limited to 'gdb/i386v-nat.c')
| -rw-r--r-- | gdb/i386v-nat.c | 289 |
1 files changed, 0 insertions, 289 deletions
diff --git a/gdb/i386v-nat.c b/gdb/i386v-nat.c deleted file mode 100644 index 3f75085e1d4..00000000000 --- a/gdb/i386v-nat.c +++ /dev/null @@ -1,289 +0,0 @@ -/* Intel 386 native support for SYSV systems (pre-SVR4). - Copyright 1988, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1998, 1999, - 2000 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" - -#ifdef HAVE_PTRACE_H -#include <ptrace.h> -#else -#ifdef HAVE_SYS_PTRACE_H -#include <sys/ptrace.h> -#endif -#endif - -#include "frame.h" -#include "inferior.h" -#include "language.h" -#include "gdbcore.h" - -#ifdef USG -#include <sys/types.h> -#endif - -#include <sys/param.h> -#include <sys/dir.h> -#include <signal.h> -#include <sys/user.h> -#include <sys/ioctl.h> -#include <fcntl.h> - - -/* FIXME: The following used to be just "#include <sys/debugreg.h>", but - * the the Linux 2.1.x kernel and glibc 2.0.x are not in sync; including - * <sys/debugreg.h> will result in an error. With luck, these losers - * will get their act together and we can trash this hack in the near future. - * --jsm 1998-10-21 - */ - -#ifdef TARGET_HAS_HARDWARE_WATCHPOINTS -#ifdef HAVE_ASM_DEBUGREG_H -#include <asm/debugreg.h> -#else -#include <sys/debugreg.h> -#endif -#endif - -#include <sys/file.h> -#include "gdb_stat.h" - -#ifdef HAVE_SYS_REG_H -#include <sys/reg.h> -#endif - -#include "floatformat.h" - -#include "target.h" - - -/* this table must line up with REGISTER_NAMES in tm-i386v.h */ -/* symbols like 'EAX' come from <sys/reg.h> */ -static int regmap[] = -{ - EAX, ECX, EDX, EBX, - UESP, EBP, ESI, EDI, - EIP, EFL, CS, SS, - DS, ES, FS, GS, -}; - -/* blockend is the value of u.u_ar0, and points to the - * place where GS is stored - */ - -int -i386_register_u_addr (int blockend, int regnum) -{ - struct user u; - int fpstate; - int ubase; - - ubase = blockend; - /* FIXME: Should have better way to test floating point range */ - if (regnum >= FP0_REGNUM && regnum <= (FP0_REGNUM + 7)) - { -#ifdef KSTKSZ /* SCO, and others? */ - ubase += 4 * (SS + 1) - KSTKSZ; - fpstate = ubase + ((char *) &u.u_fps.u_fpstate - (char *) &u); - return (fpstate + 0x1c + 10 * (regnum - FP0_REGNUM)); -#else - fpstate = ubase + ((char *) &u.i387.st_space - (char *) &u); - return (fpstate + 10 * (regnum - FP0_REGNUM)); -#endif - } - else - { - return (ubase + 4 * regmap[regnum]); - } - -} - -int -kernel_u_size (void) -{ - return (sizeof (struct user)); -} - -#ifdef TARGET_HAS_HARDWARE_WATCHPOINTS - -#if !defined (offsetof) -#define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER) -#endif - -/* Record the value of the debug control register. */ -static int debug_control_mirror; - -/* Record which address associates with which register. */ -static CORE_ADDR address_lookup[DR_LASTADDR - DR_FIRSTADDR + 1]; - -static int -i386_insert_aligned_watchpoint (int, CORE_ADDR, CORE_ADDR, int, int); - -static int -i386_insert_nonaligned_watchpoint (int, CORE_ADDR, CORE_ADDR, int, int); - -/* Insert a watchpoint. */ - -int -i386_insert_watchpoint (int pid, CORE_ADDR addr, int len, int rw) -{ - return i386_insert_aligned_watchpoint (pid, addr, addr, len, rw); -} - -static int -i386_insert_aligned_watchpoint (int pid, CORE_ADDR waddr, CORE_ADDR addr, - int len, int rw) -{ - int i; - int read_write_bits, len_bits; - int free_debug_register; - int register_number; - - /* Look for a free debug register. */ - for (i = DR_FIRSTADDR; i <= DR_LASTADDR; i++) - { - if (address_lookup[i - DR_FIRSTADDR] == 0) - break; - } - - /* No more debug registers! */ - if (i > DR_LASTADDR) - return -1; - - read_write_bits = (rw & 1) ? DR_RW_READ : DR_RW_WRITE; - - if (len == 1) - len_bits = DR_LEN_1; - else if (len == 2) - { - if (addr % 2) - return i386_insert_nonaligned_watchpoint (pid, waddr, addr, len, rw); - len_bits = DR_LEN_2; - } - - else if (len == 4) - { - if (addr % 4) - return i386_insert_nonaligned_watchpoint (pid, waddr, addr, len, rw); - len_bits = DR_LEN_4; - } - else - return i386_insert_nonaligned_watchpoint (pid, waddr, addr, len, rw); - - free_debug_register = i; - register_number = free_debug_register - DR_FIRSTADDR; - debug_control_mirror |= - ((read_write_bits | len_bits) - << (DR_CONTROL_SHIFT + DR_CONTROL_SIZE * register_number)); - debug_control_mirror |= - (1 << (DR_LOCAL_ENABLE_SHIFT + DR_ENABLE_SIZE * register_number)); - debug_control_mirror |= DR_LOCAL_SLOWDOWN; - debug_control_mirror &= ~DR_CONTROL_RESERVED; - - ptrace (6, pid, offsetof (struct user, u_debugreg[DR_CONTROL]), - debug_control_mirror); - ptrace (6, pid, offsetof (struct user, u_debugreg[free_debug_register]), - addr); - - /* Record where we came from. */ - address_lookup[register_number] = addr; - return 0; -} - -static int -i386_insert_nonaligned_watchpoint (int pid, CORE_ADDR waddr, CORE_ADDR addr, - int len, int rw) -{ - int align; - int size; - int rv; - - static int size_try_array[4][4] = - { - { 1, 1, 1, 1 }, /* trying size one */ - { 2, 1, 2, 1 }, /* trying size two */ - { 2, 1, 2, 1 }, /* trying size three */ - { 4, 1, 2, 1 } /* trying size four */ - }; - - rv = 0; - while (len > 0) - { - align = addr % 4; - /* Four is the maximum length for 386. */ - size = size_try_array[len > 4 ? 3 : len - 1][align]; - - rv = i386_insert_aligned_watchpoint (pid, waddr, addr, size, rw); - if (rv) - { - i386_remove_watchpoint (pid, waddr, size); - return rv; - } - addr += size; - len -= size; - } - return rv; -} - -/* Remove a watchpoint. */ - -int -i386_remove_watchpoint (int pid, CORE_ADDR addr, int len) -{ - int i; - int register_number; - - for (i = DR_FIRSTADDR; i <= DR_LASTADDR; i++) - { - register_number = i - DR_FIRSTADDR; - if (address_lookup[register_number] == addr) - { - debug_control_mirror &= - ~(1 << (DR_LOCAL_ENABLE_SHIFT + DR_ENABLE_SIZE * register_number)); - address_lookup[register_number] = 0; - } - } - ptrace (6, pid, offsetof (struct user, u_debugreg[DR_CONTROL]), - debug_control_mirror); - ptrace (6, pid, offsetof (struct user, u_debugreg[DR_STATUS]), 0); - - return 0; -} - -/* Check if stopped by a watchpoint. */ - -CORE_ADDR -i386_stopped_by_watchpoint (int pid) -{ - int i; - int status; - - status = ptrace (3, pid, offsetof (struct user, u_debugreg[DR_STATUS]), 0); - ptrace (6, pid, offsetof (struct user, u_debugreg[DR_STATUS]), 0); - - for (i = DR_FIRSTADDR; i <= DR_LASTADDR; i++) - { - if (status & (1 << (i - DR_FIRSTADDR))) - return address_lookup[i - DR_FIRSTADDR]; - } - - return 0; -} - -#endif /* TARGET_HAS_HARDWARE_WATCHPOINTS */ |