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Diffstat (limited to 'gdb/amd64-netbsd-tdep.c')
| -rw-r--r-- | gdb/amd64-netbsd-tdep.c | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/gdb/amd64-netbsd-tdep.c b/gdb/amd64-netbsd-tdep.c new file mode 100644 index 0000000..16c4f0b --- /dev/null +++ b/gdb/amd64-netbsd-tdep.c @@ -0,0 +1,133 @@ +/* Target-dependent code for NetBSD/amd64. + + Copyright (C) 2003-2020 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 "osabi.h" +#include "symtab.h" + +#include "amd64-tdep.h" +#include "gdbsupport/x86-xstate.h" +#include "netbsd-tdep.h" +#include "solib-svr4.h" + +/* Support for signal handlers. */ + +/* Return whether THIS_FRAME corresponds to a NetBSD sigtramp + routine. */ + +static int +amd64nbsd_sigtramp_p (struct frame_info *this_frame) +{ + CORE_ADDR pc = get_frame_pc (this_frame); + const char *name; + + find_pc_partial_function (pc, &name, NULL, NULL); + return nbsd_pc_in_sigtramp (pc, name); +} + +/* Assuming THIS_FRAME corresponds to a NetBSD sigtramp routine, + return the address of the associated mcontext structure. */ + +static CORE_ADDR +amd64nbsd_mcontext_addr (struct frame_info *this_frame) +{ + CORE_ADDR addr; + + /* The register %r15 points at `struct ucontext' upon entry of a + signal trampoline. */ + addr = get_frame_register_unsigned (this_frame, AMD64_R15_REGNUM); + + /* The mcontext structure lives as offset 56 in `struct ucontext'. */ + return addr + 56; +} + +/* NetBSD 2.0 or later. */ + +/* Mapping between the general-purpose registers in `struct reg' + format and GDB's register cache layout. */ + +/* From <machine/reg.h>. */ +int amd64nbsd_r_reg_offset[] = +{ + 14 * 8, /* %rax */ + 13 * 8, /* %rbx */ + 3 * 8, /* %rcx */ + 2 * 8, /* %rdx */ + 1 * 8, /* %rsi */ + 0 * 8, /* %rdi */ + 12 * 8, /* %rbp */ + 24 * 8, /* %rsp */ + 4 * 8, /* %r8 .. */ + 5 * 8, + 6 * 8, + 7 * 8, + 8 * 8, + 9 * 8, + 10 * 8, + 11 * 8, /* ... %r15 */ + 21 * 8, /* %rip */ + 23 * 8, /* %eflags */ + 22 * 8, /* %cs */ + 25 * 8, /* %ss */ + 18 * 8, /* %ds */ + 17 * 8, /* %es */ + 16 * 8, /* %fs */ + 15 * 8 /* %gs */ +}; + +static void +amd64nbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) +{ + struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); + + /* Initialize general-purpose register set details first. */ + tdep->gregset_reg_offset = amd64nbsd_r_reg_offset; + tdep->gregset_num_regs = ARRAY_SIZE (amd64nbsd_r_reg_offset); + tdep->sizeof_gregset = 26 * 8; + + amd64_init_abi (info, gdbarch, + amd64_target_description (X86_XSTATE_SSE_MASK, true)); + nbsd_init_abi (info, gdbarch); + + tdep->jb_pc_offset = 7 * 8; + + /* NetBSD has its own convention for signal trampolines. */ + tdep->sigtramp_p = amd64nbsd_sigtramp_p; + tdep->sigcontext_addr = amd64nbsd_mcontext_addr; + tdep->sc_reg_offset = amd64nbsd_r_reg_offset; + tdep->sc_num_regs = ARRAY_SIZE (amd64nbsd_r_reg_offset); + + /* NetBSD uses SVR4-style shared libraries. */ + set_solib_svr4_fetch_link_map_offsets + (gdbarch, svr4_lp64_fetch_link_map_offsets); +} + +void _initialize_amd64nbsd_tdep (); +void +_initialize_amd64nbsd_tdep () +{ + /* The NetBSD/amd64 native dependent code makes this assumption. */ + gdb_assert (ARRAY_SIZE (amd64nbsd_r_reg_offset) == AMD64_NUM_GREGS); + + gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x86_64, + GDB_OSABI_NETBSD, amd64nbsd_init_abi); +} |