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author | Stan Shebs <shebs@codesourcery.com> | 1999-04-16 01:34:07 +0000 |
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committer | Stan Shebs <shebs@codesourcery.com> | 1999-04-16 01:34:07 +0000 |
commit | 071ea11e85eb9d529cc5eb3d35f6247466a21b99 (patch) | |
tree | 5deda65b8d7b04d1f4cbc534c3206d328e1267ec /gdb/i386v-nat.c | |
parent | 1730ec6b1848f0f32154277f788fb29f88d8475b (diff) | |
download | fsf-binutils-gdb-071ea11e85eb9d529cc5eb3d35f6247466a21b99.zip fsf-binutils-gdb-071ea11e85eb9d529cc5eb3d35f6247466a21b99.tar.gz fsf-binutils-gdb-071ea11e85eb9d529cc5eb3d35f6247466a21b99.tar.bz2 |
Initial creation of sourceware repository
Diffstat (limited to 'gdb/i386v-nat.c')
-rw-r--r-- | gdb/i386v-nat.c | 392 |
1 files changed, 0 insertions, 392 deletions
diff --git a/gdb/i386v-nat.c b/gdb/i386v-nat.c deleted file mode 100644 index 5618687..0000000 --- a/gdb/i386v-nat.c +++ /dev/null @@ -1,392 +0,0 @@ -/* Intel 386 native support for SYSV systems (pre-SVR4). - Copyright (C) 1988, 89, 91, 92, 94, 96, 1998 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 (blockend, regnum) - 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 () -{ - 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 PARAMS ((int, CORE_ADDR, CORE_ADDR, int, - int)); - -static int -i386_insert_nonaligned_watchpoint PARAMS ((int, CORE_ADDR, CORE_ADDR, int, - int)); - -/* Insert a watchpoint. */ - -int -i386_insert_watchpoint (pid, addr, len, rw) - 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 (pid, waddr, addr, len, rw) - 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 (pid, waddr, addr, len, rw) - int pid; - CORE_ADDR waddr; - CORE_ADDR addr; - int len; - int rw; -{ - int align; - int size; - int rv; - - static int size_try_array[16] = { - 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 = (len > 4) ? 3 : len - 1; - size = size_try_array[size * 4 + 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 (pid, addr, len) - 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 (pid) - 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 */ - -#if 0 -/* using FLOAT_INFO as is would be a problem. FLOAT_INFO is called - via a command xxx and eventually calls ptrace without ever having - traversed the target vector. This would be terribly impolite - behaviour for a sun4 hosted remote gdb. - - A fix might be to move this code into the "info registers" command. - rich@cygnus.com 15 Sept 92. */ -i386_float_info () -{ - struct user u; /* just for address computations */ - int i; - /* fpstate defined in <sys/user.h> */ - struct fpstate *fpstatep; - char buf[sizeof (struct fpstate) + 2 * sizeof (int)]; - unsigned int uaddr; - char fpvalid = 0; - unsigned int rounded_addr; - unsigned int rounded_size; - extern int corechan; - int skip; - - uaddr = (char *)&u.u_fpvalid - (char *)&u; - if (target_has_execution) - { - unsigned int data; - unsigned int mask; - - rounded_addr = uaddr & -sizeof (int); - data = ptrace (3, inferior_pid, (PTRACE_ARG3_TYPE) rounded_addr, 0); - mask = 0xff << ((uaddr - rounded_addr) * 8); - - fpvalid = ((data & mask) != 0); - } -#if 0 - else - { - if (lseek (corechan, uaddr, 0) < 0) - perror ("seek on core file"); - if (myread (corechan, &fpvalid, 1) < 0) - perror ("read on core file"); - - } -#endif /* no core support yet */ - - if (fpvalid == 0) - { - printf_unfiltered ("no floating point status saved\n"); - return; - } - - uaddr = (char *)&U_FPSTATE(u) - (char *)&u; - if (target_has_execution) - { - int *ip; - - rounded_addr = uaddr & -sizeof (int); - rounded_size = (((uaddr + sizeof (struct fpstate)) - uaddr) + - sizeof (int) - 1) / sizeof (int); - skip = uaddr - rounded_addr; - - ip = (int *)buf; - for (i = 0; i < rounded_size; i++) - { - *ip++ = ptrace (3, inferior_pid, (PTRACE_ARG3_TYPE) rounded_addr, 0); - rounded_addr += sizeof (int); - } - } -#if 0 - else - { - if (lseek (corechan, uaddr, 0) < 0) - perror_with_name ("seek on core file"); - if (myread (corechan, buf, sizeof (struct fpstate)) < 0) - perror_with_name ("read from core file"); - skip = 0; - } -#endif /* 0 */ - - fpstatep = (struct fpstate *)(buf + skip); - print_387_status (fpstatep->status, (struct env387 *)fpstatep->state); -} - -#endif /* never */ |