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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-6.8/] [gdb/] [amd64fbsd-tdep.c] - Rev 288
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/* Target-dependent code for FreeBSD/amd64. Copyright (C) 2003, 2004, 2005, 2007, 2008 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 3 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, see <http://www.gnu.org/licenses/>. */ #include "defs.h" #include "arch-utils.h" #include "frame.h" #include "gdbcore.h" #include "regcache.h" #include "osabi.h" #include "gdb_assert.h" #include "gdb_string.h" #include "amd64-tdep.h" #include "bsd-uthread.h" #include "solib-svr4.h" /* Support for signal handlers. */ /* Assuming NEXT_FRAME is for a frame following a BSD sigtramp routine, return the address of the associated sigcontext structure. */ static CORE_ADDR amd64fbsd_sigcontext_addr (struct frame_info *next_frame) { CORE_ADDR sp; /* The `struct sigcontext' (which really is an `ucontext_t' on FreeBSD/amd64) lives at a fixed offset in the signal frame. See <machine/sigframe.h>. */ sp = frame_unwind_register_unsigned (next_frame, AMD64_RSP_REGNUM); return sp + 16; } /* FreeBSD 5.1-RELEASE or later. */ /* Mapping between the general-purpose registers in `struct reg' format and GDB's register cache layout. Note that some registers are 32-bit, but since we're little-endian we get away with that. */ /* From <machine/reg.h>. */ static int amd64fbsd_r_reg_offset[] = { 14 * 8, /* %rax */ 11 * 8, /* %rbx */ 13 * 8, /* %rcx */ 12 * 8, /* %rdx */ 9 * 8, /* %rsi */ 8 * 8, /* %rdi */ 10 * 8, /* %rbp */ 20 * 8, /* %rsp */ 7 * 8, /* %r8 ... */ 6 * 8, 5 * 8, 4 * 8, 3 * 8, 2 * 8, 1 * 8, 0 * 8, /* ... %r15 */ 17 * 8, /* %rip */ 19 * 8, /* %eflags */ 18 * 8, /* %cs */ 21 * 8, /* %ss */ -1, /* %ds */ -1, /* %es */ -1, /* %fs */ -1 /* %gs */ }; /* Location of the signal trampoline. */ CORE_ADDR amd64fbsd_sigtramp_start_addr = 0x7fffffffffc0ULL; CORE_ADDR amd64fbsd_sigtramp_end_addr = 0x7fffffffffe0ULL; /* From <machine/signal.h>. */ int amd64fbsd_sc_reg_offset[] = { 24 + 6 * 8, /* %rax */ 24 + 7 * 8, /* %rbx */ 24 + 3 * 8, /* %rcx */ 24 + 2 * 8, /* %rdx */ 24 + 1 * 8, /* %rsi */ 24 + 0 * 8, /* %rdi */ 24 + 8 * 8, /* %rbp */ 24 + 22 * 8, /* %rsp */ 24 + 4 * 8, /* %r8 ... */ 24 + 5 * 8, 24 + 9 * 8, 24 + 10 * 8, 24 + 11 * 8, 24 + 12 * 8, 24 + 13 * 8, 24 + 14 * 8, /* ... %r15 */ 24 + 19 * 8, /* %rip */ 24 + 21 * 8, /* %eflags */ 24 + 20 * 8, /* %cs */ 24 + 23 * 8, /* %ss */ -1, /* %ds */ -1, /* %es */ -1, /* %fs */ -1 /* %gs */ }; /* From /usr/src/lib/libc/amd64/gen/_setjmp.S. */ static int amd64fbsd_jmp_buf_reg_offset[] = { -1, /* %rax */ 1 * 8, /* %rbx */ -1, /* %rcx */ -1, /* %rdx */ -1, /* %rsi */ -1, /* %rdi */ 3 * 8, /* %rbp */ 2 * 8, /* %rsp */ -1, /* %r8 ... */ -1, -1, -1, /* ... %r11 */ 4 * 8, /* %r12 ... */ 5 * 8, 6 * 8, 7 * 8, /* ... %r15 */ 0 * 8 /* %rip */ }; static void amd64fbsd_supply_uthread (struct regcache *regcache, int regnum, CORE_ADDR addr) { gdb_byte buf[8]; int i; gdb_assert (regnum >= -1); for (i = 0; i < ARRAY_SIZE (amd64fbsd_jmp_buf_reg_offset); i++) { if (amd64fbsd_jmp_buf_reg_offset[i] != -1 && (regnum == -1 || regnum == i)) { read_memory (addr + amd64fbsd_jmp_buf_reg_offset[i], buf, 8); regcache_raw_supply (regcache, i, buf); } } } static void amd64fbsd_collect_uthread (const struct regcache *regcache, int regnum, CORE_ADDR addr) { gdb_byte buf[8]; int i; gdb_assert (regnum >= -1); for (i = 0; i < ARRAY_SIZE (amd64fbsd_jmp_buf_reg_offset); i++) { if (amd64fbsd_jmp_buf_reg_offset[i] != -1 && (regnum == -1 || regnum == i)) { regcache_raw_collect (regcache, i, buf); write_memory (addr + amd64fbsd_jmp_buf_reg_offset[i], buf, 8); } } } void amd64fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) { struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); /* Obviously FreeBSD is BSD-based. */ i386bsd_init_abi (info, gdbarch); tdep->gregset_reg_offset = amd64fbsd_r_reg_offset; tdep->gregset_num_regs = ARRAY_SIZE (amd64fbsd_r_reg_offset); tdep->sizeof_gregset = 22 * 8; amd64_init_abi (info, gdbarch); tdep->sigtramp_start = amd64fbsd_sigtramp_start_addr; tdep->sigtramp_end = amd64fbsd_sigtramp_end_addr; tdep->sigcontext_addr = amd64fbsd_sigcontext_addr; tdep->sc_reg_offset = amd64fbsd_sc_reg_offset; tdep->sc_num_regs = ARRAY_SIZE (amd64fbsd_sc_reg_offset); /* FreeBSD provides a user-level threads implementation. */ bsd_uthread_set_supply_uthread (gdbarch, amd64fbsd_supply_uthread); bsd_uthread_set_collect_uthread (gdbarch, amd64fbsd_collect_uthread); /* FreeBSD uses SVR4-style shared libraries. */ set_solib_svr4_fetch_link_map_offsets (gdbarch, svr4_lp64_fetch_link_map_offsets); } /* Provide a prototype to silence -Wmissing-prototypes. */ void _initialize_amd64fbsd_tdep (void); void _initialize_amd64fbsd_tdep (void) { gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x86_64, GDB_OSABI_FREEBSD_ELF, amd64fbsd_init_abi); }
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