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Diffstat (limited to 'contrib/gdb/bfd/elfcore.h')
-rw-r--r-- | contrib/gdb/bfd/elfcore.h | 475 |
1 files changed, 0 insertions, 475 deletions
diff --git a/contrib/gdb/bfd/elfcore.h b/contrib/gdb/bfd/elfcore.h deleted file mode 100644 index 8100627..0000000 --- a/contrib/gdb/bfd/elfcore.h +++ /dev/null @@ -1,475 +0,0 @@ -/* ELF core file support for BFD. - Copyright (C) 1995, 1996 Free Software Foundation, Inc. - -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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ -/* Core file support */ - -#ifdef HAVE_SYS_PROCFS_H /* Some core file support requires host /proc files */ -#include <signal.h> -#include <sys/procfs.h> -#else -#define bfd_prstatus(abfd, descdata, descsz, filepos) true -#define bfd_fpregset(abfd, descdata, descsz, filepos) true -#define bfd_prpsinfo(abfd, descdata, descsz, filepos) true -#endif - -#ifdef HAVE_SYS_PROCFS_H - -static boolean -bfd_prstatus (abfd, descdata, descsz, filepos) - bfd *abfd; - char *descdata; - int descsz; - long filepos; -{ - asection *newsect; - prstatus_t *status = (prstatus_t *) 0; - - if (descsz == sizeof (prstatus_t)) - { - newsect = bfd_make_section (abfd, ".reg"); - if (newsect == NULL) - return false; - newsect->_raw_size = sizeof (status->pr_reg); - newsect->filepos = filepos + (long) &status->pr_reg; - newsect->flags = SEC_HAS_CONTENTS; - newsect->alignment_power = 2; - if ((core_prstatus (abfd) = bfd_alloc (abfd, descsz)) != NULL) - { - memcpy (core_prstatus (abfd), descdata, descsz); - } - } - return true; -} - -/* Stash a copy of the prpsinfo structure away for future use. */ - -static boolean -bfd_prpsinfo (abfd, descdata, descsz, filepos) - bfd *abfd; - char *descdata; - int descsz; - long filepos; -{ - if (descsz == sizeof (prpsinfo_t)) - { - if ((core_prpsinfo (abfd) = bfd_alloc (abfd, descsz)) == NULL) - return false; - memcpy (core_prpsinfo (abfd), descdata, descsz); - } - return true; -} - -static boolean -bfd_fpregset (abfd, descdata, descsz, filepos) - bfd *abfd; - char *descdata; - int descsz; - long filepos; -{ - asection *newsect; - - newsect = bfd_make_section (abfd, ".reg2"); - if (newsect == NULL) - return false; - newsect->_raw_size = descsz; - newsect->filepos = filepos; - newsect->flags = SEC_HAS_CONTENTS; - newsect->alignment_power = 2; - return true; -} - -#endif /* HAVE_SYS_PROCFS_H */ - -/* Return a pointer to the args (including the command name) that were - seen by the program that generated the core dump. Note that for - some reason, a spurious space is tacked onto the end of the args - in some (at least one anyway) implementations, so strip it off if - it exists. */ - -char * -elf_core_file_failing_command (abfd) - bfd *abfd; -{ -#ifdef HAVE_SYS_PROCFS_H - if (core_prpsinfo (abfd)) - { - prpsinfo_t *p = core_prpsinfo (abfd); - char *scan = p->pr_psargs; - while (*scan++) - {; - } - scan -= 2; - if ((scan > p->pr_psargs) && (*scan == ' ')) - { - *scan = '\000'; - } - return p->pr_psargs; - } -#endif - return NULL; -} - -/* Return the number of the signal that caused the core dump. Presumably, - since we have a core file, we got a signal of some kind, so don't bother - checking the other process status fields, just return the signal number. - */ - -int -elf_core_file_failing_signal (abfd) - bfd *abfd; -{ -#ifdef HAVE_SYS_PROCFS_H - if (core_prstatus (abfd)) - { - return ((prstatus_t *) (core_prstatus (abfd)))->pr_cursig; - } -#endif - return -1; -} - -/* Check to see if the core file could reasonably be expected to have - come for the current executable file. Note that by default we return - true unless we find something that indicates that there might be a - problem. - */ - -boolean -elf_core_file_matches_executable_p (core_bfd, exec_bfd) - bfd *core_bfd; - bfd *exec_bfd; -{ -#ifdef HAVE_SYS_PROCFS_H - char *corename; - char *execname; -#endif - - /* First, xvecs must match since both are ELF files for the same target. */ - - if (core_bfd->xvec != exec_bfd->xvec) - { - bfd_set_error (bfd_error_system_call); - return false; - } - -#ifdef HAVE_SYS_PROCFS_H - - /* If no prpsinfo, just return true. Otherwise, grab the last component - of the exec'd pathname from the prpsinfo. */ - - if (core_prpsinfo (core_bfd)) - { - corename = (((prpsinfo_t *) core_prpsinfo (core_bfd))->pr_fname); - } - else - { - return true; - } - - /* Find the last component of the executable pathname. */ - - if ((execname = strrchr (exec_bfd->filename, '/')) != NULL) - { - execname++; - } - else - { - execname = (char *) exec_bfd->filename; - } - - /* See if they match */ - - return strcmp (execname, corename) ? false : true; - -#else - - return true; - -#endif /* HAVE_SYS_PROCFS_H */ -} - -/* ELF core files contain a segment of type PT_NOTE, that holds much of - the information that would normally be available from the /proc interface - for the process, at the time the process dumped core. Currently this - includes copies of the prstatus, prpsinfo, and fpregset structures. - - Since these structures are potentially machine dependent in size and - ordering, bfd provides two levels of support for them. The first level, - available on all machines since it does not require that the host - have /proc support or the relevant include files, is to create a bfd - section for each of the prstatus, prpsinfo, and fpregset structures, - without any interpretation of their contents. With just this support, - the bfd client will have to interpret the structures itself. Even with - /proc support, it might want these full structures for it's own reasons. - - In the second level of support, where HAVE_SYS_PROCFS_H is defined, - bfd will pick apart the structures to gather some additional - information that clients may want, such as the general register - set, the name of the exec'ed file and its arguments, the signal (if - any) that caused the core dump, etc. - - */ - -static boolean -elf_corefile_note (abfd, hdr) - bfd *abfd; - Elf_Internal_Phdr *hdr; -{ - Elf_External_Note *x_note_p; /* Elf note, external form */ - Elf_Internal_Note i_note; /* Elf note, internal form */ - char *buf = NULL; /* Entire note segment contents */ - char *namedata; /* Name portion of the note */ - char *descdata; /* Descriptor portion of the note */ - char *sectname; /* Name to use for new section */ - long filepos; /* File offset to descriptor data */ - asection *newsect; - - if (hdr->p_filesz > 0 - && (buf = (char *) bfd_malloc ((size_t) hdr->p_filesz)) != NULL - && bfd_seek (abfd, hdr->p_offset, SEEK_SET) != -1 - && bfd_read ((PTR) buf, hdr->p_filesz, 1, abfd) == hdr->p_filesz) - { - x_note_p = (Elf_External_Note *) buf; - while ((char *) x_note_p < (buf + hdr->p_filesz)) - { - i_note.namesz = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->namesz); - i_note.descsz = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->descsz); - i_note.type = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->type); - namedata = x_note_p->name; - descdata = namedata + BFD_ALIGN (i_note.namesz, 4); - filepos = hdr->p_offset + (descdata - buf); - switch (i_note.type) - { - case NT_PRSTATUS: - /* process descdata as prstatus info */ - if (! bfd_prstatus (abfd, descdata, i_note.descsz, filepos)) - return false; - sectname = ".prstatus"; - break; - case NT_FPREGSET: - /* process descdata as fpregset info */ - if (! bfd_fpregset (abfd, descdata, i_note.descsz, filepos)) - return false; - sectname = ".fpregset"; - break; - case NT_PRPSINFO: - /* process descdata as prpsinfo */ - if (! bfd_prpsinfo (abfd, descdata, i_note.descsz, filepos)) - return false; - sectname = ".prpsinfo"; - break; - default: - /* Unknown descriptor, just ignore it. */ - sectname = NULL; - break; - } - if (sectname != NULL) - { - newsect = bfd_make_section (abfd, sectname); - if (newsect == NULL) - return false; - newsect->_raw_size = i_note.descsz; - newsect->filepos = filepos; - newsect->flags = SEC_ALLOC | SEC_HAS_CONTENTS; - newsect->alignment_power = 2; - } - x_note_p = (Elf_External_Note *) - (descdata + BFD_ALIGN (i_note.descsz, 4)); - } - } - if (buf != NULL) - { - free (buf); - } - else if (hdr->p_filesz > 0) - { - return false; - } - return true; - -} - -/* Core files are simply standard ELF formatted files that partition - the file using the execution view of the file (program header table) - rather than the linking view. In fact, there is no section header - table in a core file. - - The process status information (including the contents of the general - register set) and the floating point register set are stored in a - segment of type PT_NOTE. We handcraft a couple of extra bfd sections - that allow standard bfd access to the general registers (.reg) and the - floating point registers (.reg2). - - */ - -const bfd_target * -elf_core_file_p (abfd) - bfd *abfd; -{ - Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ - Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ - Elf_External_Phdr x_phdr; /* Program header table entry, external form */ - Elf_Internal_Phdr *i_phdrp; /* Program header table, internal form */ - unsigned int phindex; - struct elf_backend_data *ebd; - - /* Read in the ELF header in external format. */ - - if (bfd_read ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd) != sizeof (x_ehdr)) - { - if (bfd_get_error () != bfd_error_system_call) - bfd_set_error (bfd_error_wrong_format); - return NULL; - } - - /* Now check to see if we have a valid ELF file, and one that BFD can - make use of. The magic number must match, the address size ('class') - and byte-swapping must match our XVEC entry, and it must have a - program header table (FIXME: See comments re segments at top of this - file). */ - - if (elf_file_p (&x_ehdr) == false) - { - wrong: - bfd_set_error (bfd_error_wrong_format); - return NULL; - } - - /* FIXME, Check EI_VERSION here ! */ - - { -#if ARCH_SIZE == 32 - int desired_address_size = ELFCLASS32; -#endif -#if ARCH_SIZE == 64 - int desired_address_size = ELFCLASS64; -#endif - - if (x_ehdr.e_ident[EI_CLASS] != desired_address_size) - goto wrong; - } - - /* Switch xvec to match the specified byte order. */ - switch (x_ehdr.e_ident[EI_DATA]) - { - case ELFDATA2MSB: /* Big-endian */ - if (! bfd_big_endian (abfd)) - goto wrong; - break; - case ELFDATA2LSB: /* Little-endian */ - if (! bfd_little_endian (abfd)) - goto wrong; - break; - case ELFDATANONE: /* No data encoding specified */ - default: /* Unknown data encoding specified */ - goto wrong; - } - - /* Allocate an instance of the elf_obj_tdata structure and hook it up to - the tdata pointer in the bfd. */ - - elf_tdata (abfd) = - (struct elf_obj_tdata *) bfd_zalloc (abfd, sizeof (struct elf_obj_tdata)); - if (elf_tdata (abfd) == NULL) - return NULL; - - /* FIXME, `wrong' returns from this point onward, leak memory. */ - - /* Now that we know the byte order, swap in the rest of the header */ - i_ehdrp = elf_elfheader (abfd); - elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp); -#if DEBUG & 1 - elf_debug_file (i_ehdrp); -#endif - - ebd = get_elf_backend_data (abfd); - - /* Check that the ELF e_machine field matches what this particular - BFD format expects. */ - if (ebd->elf_machine_code != i_ehdrp->e_machine - && (ebd->elf_machine_alt1 == 0 || i_ehdrp->e_machine != ebd->elf_machine_alt1) - && (ebd->elf_machine_alt2 == 0 || i_ehdrp->e_machine != ebd->elf_machine_alt2)) - { - const bfd_target * const *target_ptr; - - if (ebd->elf_machine_code != EM_NONE) - goto wrong; - - /* This is the generic ELF target. Let it match any ELF target - for which we do not have a specific backend. */ - for (target_ptr = bfd_target_vector; *target_ptr != NULL; target_ptr++) - { - struct elf_backend_data *back; - - if ((*target_ptr)->flavour != bfd_target_elf_flavour) - continue; - back = (struct elf_backend_data *) (*target_ptr)->backend_data; - if (back->elf_machine_code == i_ehdrp->e_machine) - { - /* target_ptr is an ELF backend which matches this - object file, so reject the generic ELF target. */ - goto wrong; - } - } - } - - /* If there is no program header, or the type is not a core file, then - we are hosed. */ - if (i_ehdrp->e_phoff == 0 || i_ehdrp->e_type != ET_CORE) - goto wrong; - - /* Allocate space for a copy of the program header table in - internal form, seek to the program header table in the file, - read it in, and convert it to internal form. As a simple sanity - check, verify that the what BFD thinks is the size of each program - header table entry actually matches the size recorded in the file. */ - - if (i_ehdrp->e_phentsize != sizeof (x_phdr)) - goto wrong; - i_phdrp = (Elf_Internal_Phdr *) - bfd_alloc (abfd, sizeof (*i_phdrp) * i_ehdrp->e_phnum); - if (!i_phdrp) - return NULL; - if (bfd_seek (abfd, i_ehdrp->e_phoff, SEEK_SET) == -1) - return NULL; - for (phindex = 0; phindex < i_ehdrp->e_phnum; phindex++) - { - if (bfd_read ((PTR) & x_phdr, sizeof (x_phdr), 1, abfd) - != sizeof (x_phdr)) - return NULL; - elf_swap_phdr_in (abfd, &x_phdr, i_phdrp + phindex); - } - - /* Once all of the program headers have been read and converted, we - can start processing them. */ - - for (phindex = 0; phindex < i_ehdrp->e_phnum; phindex++) - { - bfd_section_from_phdr (abfd, i_phdrp + phindex, phindex); - if ((i_phdrp + phindex)->p_type == PT_NOTE) - { - if (! elf_corefile_note (abfd, i_phdrp + phindex)) - return NULL; - } - } - - /* Remember the entry point specified in the ELF file header. */ - - bfd_get_start_address (abfd) = i_ehdrp->e_entry; - - return abfd->xvec; -} |