/* BFD back end for NetBSD style core files Copyright (C) 1988-2024 Free Software Foundation, Inc. Written by Paul Kranenburg, EUR This file is part of BFD, the Binary File Descriptor library. 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, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ #include "sysdep.h" #include "bfd.h" #include "libbfd.h" #include "libaout.h" /* BFD a.out internal data structures. */ #include #include #include #include /* The machine ID for OpenBSD/sparc64 and older versions of NetBSD/sparc64 overlaps with M_MIPS1. */ #define M_SPARC64_OPENBSD M_MIPS1 /* Offset of StackGhost cookie within `struct md_coredump' on OpenBSD/sparc. */ #define SPARC_WCOOKIE_OFFSET 344 /* Offset of StackGhost cookie within `struct md_coredump' on OpenBSD/sparc64. */ #define SPARC64_WCOOKIE_OFFSET 832 #define netbsd_core_file_matches_executable_p generic_core_file_matches_executable_p #define netbsd_core_file_pid _bfd_nocore_core_file_pid struct netbsd_core_struct { struct core core; }; /* Handle NetBSD-style core dump file. */ static bfd_cleanup netbsd_core_file_p (bfd *abfd) { int val; unsigned i; file_ptr offset; asection *asect; struct core core; struct coreseg coreseg; struct netbsd_core_struct *rawptr; val = bfd_read (&core, sizeof core, abfd); if (val != sizeof core) { /* Too small to be a core file. */ bfd_set_error (bfd_error_wrong_format); return 0; } if (CORE_GETMAGIC (core) != COREMAGIC) { bfd_set_error (bfd_error_wrong_format); return 0; } rawptr = bfd_alloc (abfd, sizeof (*rawptr) + 1); if (rawptr == NULL) return 0; abfd->tdata.netbsd_core_data = rawptr; rawptr->core = core; /* Ensure core_file_failing_command string is terminated. This is just to stop buffer overflows on fuzzed files. */ ((char *) rawptr)[sizeof (*rawptr)] = 0; offset = core.c_hdrsize; for (i = 0; i < core.c_nseg; i++) { const char *sname; flagword flags; if (bfd_seek (abfd, offset, SEEK_SET) != 0) goto punt; val = bfd_read (&coreseg, sizeof coreseg, abfd); if (val != sizeof coreseg) { bfd_set_error (bfd_error_file_truncated); goto punt; } if (CORE_GETMAGIC (coreseg) != CORESEGMAGIC) { bfd_set_error (bfd_error_wrong_format); goto punt; } offset += core.c_seghdrsize; switch (CORE_GETFLAG (coreseg)) { case CORE_CPU: sname = ".reg"; flags = SEC_ALLOC + SEC_HAS_CONTENTS; break; case CORE_DATA: sname = ".data"; flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS; break; case CORE_STACK: sname = ".stack"; flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS; break; default: sname = ".unknown"; flags = SEC_ALLOC + SEC_HAS_CONTENTS; break; } asect = bfd_make_section_anyway_with_flags (abfd, sname, flags); if (asect == NULL) goto punt; asect->size = coreseg.c_size; asect->vma = coreseg.c_addr; asect->filepos = offset; asect->alignment_power = 2; if (CORE_GETFLAG (coreseg) == CORE_CPU) { bfd_size_type wcookie_offset; switch (CORE_GETMID (core)) { case M_SPARC_NETBSD: wcookie_offset = SPARC_WCOOKIE_OFFSET; break; case M_SPARC64_OPENBSD: wcookie_offset = SPARC64_WCOOKIE_OFFSET; break; default: wcookie_offset = 0; break; } if (wcookie_offset > 0 && coreseg.c_size > wcookie_offset) { /* Truncate the .reg section. */ asect->size = wcookie_offset; /* And create the .wcookie section. */ flags = SEC_ALLOC + SEC_HAS_CONTENTS; asect = bfd_make_section_anyway_with_flags (abfd, ".wcookie", flags); if (asect == NULL) goto punt; asect->size = coreseg.c_size - wcookie_offset; asect->vma = 0; asect->filepos = offset + wcookie_offset; asect->alignment_power = 2; } } offset += coreseg.c_size; } /* Set architecture from machine ID. */ switch (CORE_GETMID (core)) { case M_ALPHA_NETBSD: bfd_default_set_arch_mach (abfd, bfd_arch_alpha, 0); break; case M_ARM6_NETBSD: bfd_default_set_arch_mach (abfd, bfd_arch_arm, bfd_mach_arm_3); break; case M_X86_64_NETBSD: bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64); break; case M_386_NETBSD: bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386); break; case M_68K_NETBSD: case M_68K4K_NETBSD: bfd_default_set_arch_mach (abfd, bfd_arch_m68k, 0); break; case M_HPPA_OPENBSD: bfd_default_set_arch_mach (abfd, bfd_arch_hppa, bfd_mach_hppa11); break; case M_POWERPC_NETBSD: bfd_default_set_arch_mach (abfd, bfd_arch_powerpc, bfd_mach_ppc); break; case M_SPARC_NETBSD: bfd_default_set_arch_mach (abfd, bfd_arch_sparc, bfd_mach_sparc); break; case M_SPARC64_NETBSD: case M_SPARC64_OPENBSD: bfd_default_set_arch_mach (abfd, bfd_arch_sparc, bfd_mach_sparc_v9); break; case M_VAX_NETBSD: case M_VAX4K_NETBSD: bfd_default_set_arch_mach (abfd, bfd_arch_vax, 0); break; } /* OK, we believe you. You're a core file (sure, sure). */ return _bfd_no_cleanup; punt: bfd_release (abfd, abfd->tdata.any); abfd->tdata.any = NULL; bfd_section_list_clear (abfd); return 0; } static char* netbsd_core_file_failing_command (bfd *abfd) { /*return core_command (abfd);*/ return abfd->tdata.netbsd_core_data->core.c_name; } static int netbsd_core_file_failing_signal (bfd *abfd) { /*return core_signal (abfd);*/ return abfd->tdata.netbsd_core_data->core.c_signo; } /* If somebody calls any byte-swapping routines, shoot them. */ static void swap_abort (void) { /* This way doesn't require any declaration for ANSI to fuck up. */ abort (); } #define NO_GET ((bfd_vma (*) (const void *)) swap_abort) #define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort) #define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort) #define NO_GET64 ((uint64_t (*) (const void *)) swap_abort) #define NO_PUT64 ((void (*) (uint64_t, void *)) swap_abort) #define NO_GETS64 ((int64_t (*) (const void *)) swap_abort) const bfd_target core_netbsd_vec = { "netbsd-core", bfd_target_unknown_flavour, BFD_ENDIAN_UNKNOWN, /* Target byte order. */ BFD_ENDIAN_UNKNOWN, /* Target headers byte order. */ (HAS_RELOC | EXEC_P | /* Object flags. */ HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED), (SEC_HAS_CONTENTS | /* Section flags. */ SEC_ALLOC | SEC_LOAD | SEC_RELOC), 0, /* Symbol prefix. */ ' ', /* ar_pad_char. */ 16, /* ar_max_namelen. */ 0, /* Match priority. */ TARGET_KEEP_UNUSED_SECTION_SYMBOLS, /* keep unused section symbols. */ NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit data. */ NO_GET, NO_GETS, NO_PUT, /* 32 bit data. */ NO_GET, NO_GETS, NO_PUT, /* 16 bit data. */ NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit hdrs. */ NO_GET, NO_GETS, NO_PUT, /* 32 bit hdrs. */ NO_GET, NO_GETS, NO_PUT, /* 16 bit hdrs. */ { /* bfd_check_format. */ _bfd_dummy_target, /* Unknown format. */ _bfd_dummy_target, /* Object file. */ _bfd_dummy_target, /* Archive. */ netbsd_core_file_p /* A core file. */ }, { /* bfd_set_format. */ _bfd_bool_bfd_false_error, _bfd_bool_bfd_false_error, _bfd_bool_bfd_false_error, _bfd_bool_bfd_false_error }, { /* bfd_write_contents. */ _bfd_bool_bfd_false_error, _bfd_bool_bfd_false_error, _bfd_bool_bfd_false_error, _bfd_bool_bfd_false_error }, BFD_JUMP_TABLE_GENERIC (_bfd_generic), BFD_JUMP_TABLE_COPY (_bfd_generic), BFD_JUMP_TABLE_CORE (netbsd), BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive), BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols), BFD_JUMP_TABLE_RELOCS (_bfd_norelocs), BFD_JUMP_TABLE_WRITE (_bfd_generic), BFD_JUMP_TABLE_LINK (_bfd_nolink), BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), NULL, NULL /* Backend_data. */ };