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Add support for FreeBSD/i386 ELF.
* i386bsd-nat.c: New file. * config/i386/tm-fbsd.h (HAVE_I387_REGS): Define. Include "i386/tm-i386.h" instead of "i386/tm-i386b.h". (NUM_REGS): Remove redefinition. (USE_STRUCT_CONVENTION): Define. (i386_float_info): Remove prototype. (FLOAT_INFO): Remove define. (JB_ELEMENT_SIZE): Define to 4. (JB_PC): Define to 0. (GET_LONGJMP_TARGET): Define. (SIGTRAMP_START, SIGTRAMP_END): Define. (SIGCONTEXT_PC_OFFSET): Define. (IN_SOLIB_CALL_TRAMPOLINE): Only define if !SVR4_SHARED_LIBS * config/i386/nm-fbsd.h (PTRACE_ARG3_TYPE): Define to caddr_t. (FETCH_INFERIOR_REGISTERS): Define. (ATTACH_DETACH): Define. (kernel_u_size): Remove PARAMS. (register_u_addr): Use CORE_ADDR in prototype where appropriate. Remove PARAMS. (SVR4_SHARED_LIBS) [FREEBSD_ELF || __ELF__ && !FREEBSD_AOUT]: Define. [SVR4_SHARED_LIBS]: Include "elf/common.h". Only define aliases for struct members from <link.h> if !SVR4_SHARED_LIBS. * config/i386/xm-fbsd.h: New file. * config/i386/fbsd.mt (TDEPFILES): Remove solib.o. * config/i386/fbsd.mh (NATDEPFILES): Remove i386b-nat.o. Add core-regset.o i387-nat.o i386bsd-nat.o.
This commit is contained in:
Mark Kettenis
238
gdb/i386bsd-nat.c
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238
gdb/i386bsd-nat.c
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/* Native-dependent code for modern i386 BSD's.
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Copyright (C) 2000 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include "inferior.h"
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#include <sys/types.h>
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#include <sys/ptrace.h>
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#include <machine/reg.h>
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#include <machine/frame.h>
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#ifdef HAVE_SYS_PROCFS_H
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#include <sys/procfs.h>
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#endif
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#ifndef HAVE_GREGSET_T
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typedef struct reg gregset_t;
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#endif
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#ifndef HAVE_FPREGSET_T
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typedef struct fpreg fpregset_t;
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#endif
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/* In older BSD versions we cannot get at some of the segment
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registers. FreeBSD for example didn't support the %fs and %gs
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registers until the 3.0 release. We have autoconf checks for their
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presence, and deal gracefully with their absence. */
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/* Registers we shouldn't try to fetch. */
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#if !defined (CANNOT_FETCH_REGISTER)
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#define CANNOT_FETCH_REGISTER(regno) cannot_fetch_register (regno)
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#endif
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/* Registers we shouldn't try to store. */
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#if !defined (CANNOT_STORE_REGISTER)
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#define CANNOT_STORE_REGISTER(regno) CANNOT_FETCH_REGISTER (regno)
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#endif
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/* Offset to the gregset_t location where REG is stored. */
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#define REG_OFFSET(reg) offsetof (gregset_t, reg)
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/* At reg_offset[REGNO] you'll find the offset to the gregset_t
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location where the GDB register REGNO is stored. Unsupported
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registers are marked with `-1'. */
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static int reg_offset[] =
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{
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REG_OFFSET (r_eax),
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REG_OFFSET (r_ecx),
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REG_OFFSET (r_edx),
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REG_OFFSET (r_edx),
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REG_OFFSET (r_esp),
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REG_OFFSET (r_ebp),
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REG_OFFSET (r_esi),
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REG_OFFSET (r_edi),
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REG_OFFSET (r_eip),
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REG_OFFSET (r_eflags),
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REG_OFFSET (r_cs),
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REG_OFFSET (r_ss),
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REG_OFFSET (r_ds),
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REG_OFFSET (r_es),
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#ifdef HAVE_R_FS
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REG_OFFSET (r_fs),
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#else
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-1,
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#endif
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#ifdef HAVE_R_GS
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REG_OFFSET (r_gs)
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#else
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-1
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#endif
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};
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#define REG_ADDR(regset, regno) ((char *) (regset) + reg_offset[regno])
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/* Return nonzero if we shouldn't try to fetch register REGNO. */
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static int
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cannot_fetch_register (int regno)
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{
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return (reg_offset[regno] == -1);
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}
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/* Transfering the registers between GDB, inferiors and core files. */
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/* Fill GDB's register array with the genereal-purpose register values
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in *GREGSETP. */
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void
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supply_gregset (gregset_t *gregsetp)
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{
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char buf[MAX_REGISTER_RAW_SIZE];
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int i;
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for (i = 0; i < NUM_GREGS; i++)
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{
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if (CANNOT_FETCH_REGISTER (i))
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{
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memset (buf, 0, REGISTER_RAW_SIZE (i));
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supply_register (i, buf);
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}
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else
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supply_register (i, REG_ADDR (gregsetp, i));
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}
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}
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/* Fill register REGNO (if it is a general-purpose register) in
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*GREGSETPS with the value in GDB's register array. If REGNO is -1,
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do this for all registers. */
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void
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fill_gregset (gregset_t *gregsetp, int regno)
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{
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int i;
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for (i = 0; i < NUM_GREGS; i++)
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if ((regno == -1 || regno == i) && ! CANNOT_STORE_REGISTER (i))
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memcpy (REG_ADDR (gregsetp, i), ®isters[REGISTER_BYTE (regno)],
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REGISTER_RAW_SIZE (i));
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}
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#include "i387-nat.h"
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/* Fill GDB's register array with the floating-point register values
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in *FPREGSETP. */
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void
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supply_fpregset (fpregset_t *fpregsetp)
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{
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i387_supply_fsave ((char *) fpregsetp);
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}
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/* Fill register REGNO (if it is a floating-point register) in
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*FPREGSETP with the value in GDB's register array. If REGNO is -1,
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do this for all registers. */
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void
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fill_fpregset (fpregset_t *fpregsetp, int regno)
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{
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i387_fill_fsave ((char *) fpregsetp, regno);
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}
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/* Fetch register REGNO from the inferior. If REGNO is -1, do this
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for all registers (including the floating point registers). */
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void
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fetch_inferior_registers (int regno)
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{
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gregset_t gregs;
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if (ptrace (PT_GETREGS, inferior_pid, (PTRACE_ARG3_TYPE) &gregs, 0) == -1)
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perror_with_name ("Couldn't get registers");
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supply_gregset (&gregs);
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if (regno == -1 || regno >= FP0_REGNUM)
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{
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fpregset_t fpregs;
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if (ptrace (PT_GETFPREGS, inferior_pid,
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(PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
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perror_with_name ("Couldn't get floating point status");
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supply_fpregset (&fpregs);
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}
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}
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/* Store register REGNO back into the inferior. If REGNO is -1, do
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this for all registers (including the floating point registers). */
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void
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store_inferior_registers (int regno)
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{
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gregset_t gregs;
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if (ptrace (PT_GETREGS, inferior_pid, (PTRACE_ARG3_TYPE) &gregs, 0) == -1)
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perror_with_name ("Couldn't get registers");
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fill_gregset (&gregs, regno);
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if (ptrace (PT_SETREGS, inferior_pid, (PTRACE_ARG3_TYPE) &gregs, 0) == -1)
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perror_with_name ("Couldn't write registers");
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if (regno == -1 || regno >= FP0_REGNUM)
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{
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fpregset_t fpregs;
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if (ptrace (PT_GETFPREGS, inferior_pid,
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(PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
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perror_with_name ("Couldn't get floating point status");
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fill_fpregset (&fpregs, regno);
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if (ptrace (PT_SETFPREGS, inferior_pid,
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(PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
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perror_with_name ("Couldn't write floating point status");
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}
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}
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/* Support for the user struct. */
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/* Return the address register REGNO. BLOCKEND is the value of
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u.u_ar0, which should point to the registers. */
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CORE_ADDR
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register_u_addr (CORE_ADDR blockend, int regno)
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{
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return (CORE_ADDR) REG_ADDR (blockend, regno);
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}
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#include <sys/param.h>
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#include <sys/user.h>
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/* Return the size of the user struct. */
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int
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kernel_u_size (void)
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{
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return (sizeof (struct user));
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}
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