| 1 | /* Target-dependent code for the MIPS architecture running on IRIX, |
| 2 | for GDB, the GNU Debugger. |
| 3 | |
| 4 | Copyright (C) 2002, 2007, 2008 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 | #include "gdb_string.h" |
| 24 | #include "solib.h" |
| 25 | #include "solib-irix.h" |
| 26 | |
| 27 | #include "elf-bfd.h" |
| 28 | |
| 29 | static void |
| 30 | mips_irix_elf_osabi_sniff_abi_tag_sections (bfd *abfd, asection *sect, |
| 31 | void *obj) |
| 32 | { |
| 33 | enum gdb_osabi *os_ident_ptr = obj; |
| 34 | const char *name; |
| 35 | unsigned int sectsize; |
| 36 | |
| 37 | name = bfd_get_section_name (abfd, sect); |
| 38 | sectsize = bfd_section_size (abfd, sect); |
| 39 | |
| 40 | if (strncmp (name, ".MIPS.", 6) == 0 && sectsize > 0) |
| 41 | { |
| 42 | /* The presence of a section named with a ".MIPS." prefix is |
| 43 | indicative of an IRIX binary. */ |
| 44 | *os_ident_ptr = GDB_OSABI_IRIX; |
| 45 | } |
| 46 | } |
| 47 | |
| 48 | static enum gdb_osabi |
| 49 | mips_irix_elf_osabi_sniffer (bfd *abfd) |
| 50 | { |
| 51 | unsigned int elfosabi; |
| 52 | enum gdb_osabi osabi = GDB_OSABI_UNKNOWN; |
| 53 | |
| 54 | /* If the generic sniffer gets a hit, return and let other sniffers |
| 55 | get a crack at it. */ |
| 56 | bfd_map_over_sections (abfd, |
| 57 | generic_elf_osabi_sniff_abi_tag_sections, |
| 58 | &osabi); |
| 59 | if (osabi != GDB_OSABI_UNKNOWN) |
| 60 | return GDB_OSABI_UNKNOWN; |
| 61 | |
| 62 | elfosabi = elf_elfheader (abfd)->e_ident[EI_OSABI]; |
| 63 | |
| 64 | if (elfosabi == ELFOSABI_NONE) |
| 65 | { |
| 66 | /* When elfosabi is ELFOSABI_NONE (0), then the ELF structures in the |
| 67 | file are conforming to the base specification for that machine |
| 68 | (there are no OS-specific extensions). In order to determine the |
| 69 | real OS in use we must look for OS notes that have been added. |
| 70 | |
| 71 | For IRIX, we simply look for sections named with .MIPS. as |
| 72 | prefixes. */ |
| 73 | bfd_map_over_sections (abfd, |
| 74 | mips_irix_elf_osabi_sniff_abi_tag_sections, |
| 75 | &osabi); |
| 76 | } |
| 77 | return osabi; |
| 78 | } |
| 79 | |
| 80 | static void |
| 81 | mips_irix_init_abi (struct gdbarch_info info, |
| 82 | struct gdbarch *gdbarch) |
| 83 | { |
| 84 | set_solib_ops (gdbarch, &irix_so_ops); |
| 85 | } |
| 86 | |
| 87 | void |
| 88 | _initialize_mips_irix_tdep (void) |
| 89 | { |
| 90 | /* Register an ELF OS ABI sniffer for IRIX binaries. */ |
| 91 | gdbarch_register_osabi_sniffer (bfd_arch_mips, |
| 92 | bfd_target_elf_flavour, |
| 93 | mips_irix_elf_osabi_sniffer); |
| 94 | |
| 95 | gdbarch_register_osabi (bfd_arch_mips, 0, GDB_OSABI_IRIX, |
| 96 | mips_irix_init_abi); |
| 97 | } |