X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=gdb%2Fi386bsd-tdep.c;h=6266860254c780fd8e10de221b052215ceed52f4;hb=ed34ef5ed3b11141a622e3edfb0c47e790f1fea7;hp=a419cab87d3f8711909744af61dc3a886016124a;hpb=21d0e8a4015bf243d96e3225f02d0604c5ed784a;p=platform%2Fupstream%2Fbinutils.git diff --git a/gdb/i386bsd-tdep.c b/gdb/i386bsd-tdep.c index a419cab..6266860 100644 --- a/gdb/i386bsd-tdep.c +++ b/gdb/i386bsd-tdep.c @@ -1,11 +1,12 @@ /* Target-dependent code for i386 BSD's. - Copyright 2001, 2002 Free Software Foundation, Inc. + + Copyright (C) 2001-2014 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 + 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, @@ -14,202 +15,74 @@ 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. */ + along with this program. If not, see . */ #include "defs.h" #include "arch-utils.h" #include "frame.h" #include "gdbcore.h" #include "regcache.h" +#include "osabi.h" #include "i386-tdep.h" /* Support for signal handlers. */ -/* Return whether PC is in a BSD sigtramp routine. */ - -static int -i386bsd_pc_in_sigtramp (CORE_ADDR pc, char *name) -{ - struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); - - return (pc >= tdep->sigtramp_start && pc < tdep->sigtramp_end); -} - -/* Assuming FRAME is for a BSD sigtramp routine, return the address of - the associated sigcontext structure. - - Note: This function is used for Solaris 2 too, so don't make it - static. */ - -CORE_ADDR -i386bsd_sigcontext_addr (struct frame_info *frame) -{ - if (frame->next) - /* If this isn't the top frame, the next frame must be for the - signal handler itself. A pointer to the sigcontext structure - is passed as the third argument to the signal handler. */ - return read_memory_unsigned_integer (frame->next->frame + 16, 4); - - /* This is the top frame. We'll have to find the address of the - sigcontext structure by looking at the stack pointer. */ - return read_memory_unsigned_integer (read_register (SP_REGNUM) + 8, 4); -} - -/* Return the start address of the sigtramp routine. */ +/* Assuming THIS_FRAME is for a BSD sigtramp routine, return the + address of the associated sigcontext structure. */ -CORE_ADDR -i386bsd_sigtramp_start (CORE_ADDR pc) +static CORE_ADDR +i386bsd_sigcontext_addr (struct frame_info *this_frame) { - return gdbarch_tdep (current_gdbarch)->sigtramp_start; -} + struct gdbarch *gdbarch = get_frame_arch (this_frame); + enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); + gdb_byte buf[4]; + CORE_ADDR sp; -/* Return the end address of the sigtramp routine. */ + get_frame_register (this_frame, I386_ESP_REGNUM, buf); + sp = extract_unsigned_integer (buf, 4, byte_order); -CORE_ADDR -i386bsd_sigtramp_end (CORE_ADDR pc) -{ - return gdbarch_tdep (current_gdbarch)->sigtramp_end; + return read_memory_unsigned_integer (sp + 8, 4, byte_order); } /* Support for shared libraries. */ -/* Return non-zero if we are in a shared library trampoline code stub. */ - -int -i386bsd_aout_in_solib_call_trampoline (CORE_ADDR pc, char *name) -{ - return (name && !strcmp (name, "_DYNAMIC")); -} - /* Traditional BSD (4.3 BSD, still used for BSDI and 386BSD). */ /* From . */ -int i386bsd_sc_pc_offset = 20; +int i386bsd_sc_reg_offset[] = +{ + -1, /* %eax */ + -1, /* %ecx */ + -1, /* %edx */ + -1, /* %ebx */ + 8 + 0 * 4, /* %esp */ + 8 + 1 * 4, /* %ebp */ + -1, /* %esi */ + -1, /* %edi */ + 8 + 3 * 4, /* %eip */ + 8 + 4 * 4, /* %eflags */ + -1, /* %cs */ + -1, /* %ss */ + -1, /* %ds */ + -1, /* %es */ + -1, /* %fs */ + -1 /* %gs */ +}; -static void +void i386bsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) { struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); - set_gdbarch_pc_in_sigtramp (gdbarch, i386bsd_pc_in_sigtramp); - - /* Assume SunOS-style shared libraries. */ - set_gdbarch_in_solib_call_trampoline (gdbarch, - i386bsd_aout_in_solib_call_trampoline); - tdep->jb_pc_offset = 0; tdep->sigtramp_start = 0xfdbfdfc0; tdep->sigtramp_end = 0xfdbfe000; tdep->sigcontext_addr = i386bsd_sigcontext_addr; - tdep->sc_pc_offset = i386bsd_sc_pc_offset; -} - -/* NetBSD 1.0 or later. */ - -/* From . */ -int i386nbsd_sc_pc_offset = 44; - -static void -i386nbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) -{ - struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); - - /* Obviously NetBSD is BSD-based. */ - i386bsd_init_abi (info, gdbarch); - - /* NetBSD uses -freg-struct-return by default. */ - tdep->struct_return = reg_struct_return; - - /* NetBSD uses a different memory layout. */ - tdep->sigtramp_start = 0xbfbfdf20; - tdep->sigtramp_end = 0xbfbfdff0; - - /* NetBSD has a `struct sigcontext' that's different from the - origional 4.3 BSD. */ - tdep->sc_pc_offset = i386nbsd_sc_pc_offset; -} - -/* NetBSD ELF. */ -static void -i386nbsdelf_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) -{ - struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); - - /* It's still NetBSD. */ - i386nbsd_init_abi (info, gdbarch); - - /* But ELF-based. */ - i386_elf_init_abi (info, gdbarch); - - /* NetBSD ELF uses SVR4-style shared libraries. */ - set_gdbarch_in_solib_call_trampoline (gdbarch, - generic_in_solib_call_trampoline); - - /* NetBSD ELF uses -fpcc-struct-return by default. */ - tdep->struct_return = pcc_struct_return; - - /* We support the SSE registers on NetBSD ELF. */ - tdep->num_xmm_regs = I386_NUM_XREGS - 1; - set_gdbarch_num_regs (gdbarch, I386_NUM_GREGS + I386_NUM_FREGS - + I386_NUM_XREGS); -} - -/* FreeBSD 3.0-RELEASE or later. */ - -CORE_ADDR i386fbsd_sigtramp_start = 0xbfbfdf20; -CORE_ADDR i386fbsd_sigtramp_end = 0xbfbfdff0; - -static void -i386fbsdaout_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); - - /* FreeBSD uses -freg-struct-return by default. */ - tdep->struct_return = reg_struct_return; - - /* FreeBSD uses a different memory layout. */ - tdep->sigtramp_start = i386fbsd_sigtramp_start; - tdep->sigtramp_end = i386fbsd_sigtramp_end; -} - -static void -i386fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) -{ - /* It's almost identical to FreeBSD a.out. */ - i386fbsdaout_init_abi (info, gdbarch); - - /* Except that it uses ELF. */ - i386_elf_init_abi (info, gdbarch); - - /* FreeBSD ELF uses SVR4-style shared libraries. */ - set_gdbarch_in_solib_call_trampoline (gdbarch, - generic_in_solib_call_trampoline); -} - -/* FreeBSD 4.0-RELEASE or later. */ - -/* From . */ -int i386fbsd4_sc_pc_offset = 76; - -static void -i386fbsd4_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) -{ - struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); - - /* Inherit stuff from older releases. We assume that FreeBSD - 4.0-RELEASE always uses ELF. */ - i386fbsd_init_abi (info, gdbarch); - - /* FreeBSD 4.0 introduced a new `struct sigcontext'. */ - tdep->sc_pc_offset = i386fbsd4_sc_pc_offset; + tdep->sc_reg_offset = i386bsd_sc_reg_offset; + tdep->sc_num_regs = ARRAY_SIZE (i386bsd_sc_reg_offset); } @@ -225,6 +98,15 @@ i386bsd_aout_osabi_sniffer (bfd *abfd) return GDB_OSABI_UNKNOWN; } +static enum gdb_osabi +i386bsd_core_osabi_sniffer (bfd *abfd) +{ + if (strcmp (bfd_get_target (abfd), "netbsd-core") == 0) + return GDB_OSABI_NETBSD_AOUT; + + return GDB_OSABI_UNKNOWN; +} + /* Provide a prototype to silence -Wmissing-prototypes. */ void _initialize_i386bsd_tdep (void); @@ -235,12 +117,7 @@ _initialize_i386bsd_tdep (void) gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_aout_flavour, i386bsd_aout_osabi_sniffer); - gdbarch_register_osabi (bfd_arch_i386, GDB_OSABI_NETBSD_AOUT, - i386nbsd_init_abi); - gdbarch_register_osabi (bfd_arch_i386, GDB_OSABI_NETBSD_ELF, - i386nbsdelf_init_abi); - gdbarch_register_osabi (bfd_arch_i386, GDB_OSABI_FREEBSD_AOUT, - i386fbsdaout_init_abi); - gdbarch_register_osabi (bfd_arch_i386, GDB_OSABI_FREEBSD_ELF, - i386fbsd4_init_abi); + /* BFD doesn't set a flavour for NetBSD style a.out core files. */ + gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_unknown_flavour, + i386bsd_core_osabi_sniffer); }