1/* Target-dependent code for the MIPS architecture running on IRIX, 2 for GDB, the GNU Debugger. 3 4 Copyright (C) 2002, 2007 Free Software Foundation, Inc. 5 6 This file is part of GDB. 7 8 This program is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License as published by 10 the Free Software Foundation; either version 3 of the License, or 11 (at your option) any later version. 12 13 This program is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 GNU General Public License for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 20 21#include "defs.h" 22#include "osabi.h" 23 24#include "elf-bfd.h" 25 26static void 27mips_irix_elf_osabi_sniff_abi_tag_sections (bfd *abfd, asection *sect, 28 void *obj) 29{ 30 enum gdb_osabi *os_ident_ptr = obj; 31 const char *name; 32 unsigned int sectsize; 33 34 name = bfd_get_section_name (abfd, sect); 35 sectsize = bfd_section_size (abfd, sect); 36 37 if (strncmp (name, ".MIPS.", 6) == 0 && sectsize > 0) 38 { 39 /* The presence of a section named with a ".MIPS." prefix is 40 indicative of an IRIX binary. */ 41 *os_ident_ptr = GDB_OSABI_IRIX; 42 } 43} 44 45static enum gdb_osabi 46mips_irix_elf_osabi_sniffer (bfd *abfd) 47{ 48 unsigned int elfosabi; 49 enum gdb_osabi osabi = GDB_OSABI_UNKNOWN; 50 51 /* If the generic sniffer gets a hit, return and let other sniffers 52 get a crack at it. */ 53 bfd_map_over_sections (abfd, 54 generic_elf_osabi_sniff_abi_tag_sections, 55 &osabi); 56 if (osabi != GDB_OSABI_UNKNOWN) 57 return GDB_OSABI_UNKNOWN; 58 59 elfosabi = elf_elfheader (abfd)->e_ident[EI_OSABI]; 60 61 if (elfosabi == ELFOSABI_NONE) 62 { 63 /* When elfosabi is ELFOSABI_NONE (0), then the ELF structures in the 64 file are conforming to the base specification for that machine 65 (there are no OS-specific extensions). In order to determine the 66 real OS in use we must look for OS notes that have been added. 67 68 For IRIX, we simply look for sections named with .MIPS. as 69 prefixes. */ 70 bfd_map_over_sections (abfd, 71 mips_irix_elf_osabi_sniff_abi_tag_sections, 72 &osabi); 73 } 74 return osabi; 75} 76 77static void 78mips_irix_init_abi (struct gdbarch_info info, 79 struct gdbarch *gdbarch) 80{ 81} 82 83void 84_initialize_mips_irix_tdep (void) 85{ 86 /* Register an ELF OS ABI sniffer for IRIX binaries. */ 87 gdbarch_register_osabi_sniffer (bfd_arch_mips, 88 bfd_target_elf_flavour, 89 mips_irix_elf_osabi_sniffer); 90 91 gdbarch_register_osabi (bfd_arch_mips, 0, GDB_OSABI_IRIX, 92 mips_irix_init_abi); 93} 94