| /* Create descriptor from file descriptor for processing file. |
| Copyright (C) 2000, 2002 Red Hat, Inc. |
| Written by Ulrich Drepper <drepper@redhat.com>, 2000. |
| |
| This program is Open Source software; you can redistribute it and/or |
| modify it under the terms of the Open Software License version 1.0 as |
| published by the Open Source Initiative. |
| |
| You should have received a copy of the Open Software License along |
| with this program; if not, you may obtain a copy of the Open Software |
| License version 1.0 from http://www.opensource.org/licenses/osl.php or |
| by writing the Open Source Initiative c/o Lawrence Rosen, Esq., |
| 3001 King Ranch Road, Ukiah, CA 95482. */ |
| |
| #ifdef HAVE_CONFIG_H |
| # include <config.h> |
| #endif |
| |
| #include <stddef.h> |
| #include <sys/stat.h> |
| |
| #include <libdwarfP.h> |
| |
| |
| int |
| dwarf_init (fd, access, errhand, errarg, dbg, error) |
| int fd; |
| Dwarf_Unsigned access; |
| Dwarf_Handler errhand; |
| Dwarf_Ptr errarg; |
| Dwarf_Debug *dbg; |
| Dwarf_Error *error; |
| { |
| Elf *elf; |
| Elf_Cmd cmd; |
| struct Dwarf_Debug_s newdbg; |
| int result = DW_DLV_ERROR; |
| |
| switch (access) |
| { |
| case DW_DLC_READ: |
| cmd = ELF_C_READ_MMAP; |
| break; |
| case DW_DLC_WRITE: |
| cmd = ELF_C_WRITE; |
| break; |
| case DW_DLC_RDWR: |
| cmd = ELF_C_RDWR; |
| break; |
| default: |
| /* These are the error values we want to use. */ |
| newdbg.dbg_errhand = errhand; |
| newdbg.dbg_errarg = errarg; |
| |
| __libdwarf_error (&newdbg, error, DW_E_INVALID_ACCESS); |
| return DW_DLV_ERROR; |
| } |
| |
| /* We have to call `elf_version' here since the user might have not |
| done it or initialized libelf with a different version. This |
| would break libdwarf since we are using the ELF data structures |
| in a certain way. */ |
| elf_version (EV_CURRENT); |
| |
| /* Get an ELF descriptor. */ |
| elf = elf_begin (fd, cmd, NULL); |
| if (elf == NULL) |
| { |
| /* Test why the `elf_begin" call failed. */ |
| struct stat64 st; |
| |
| /* These are the error values we want to use. */ |
| newdbg.dbg_errhand = errhand; |
| newdbg.dbg_errarg = errarg; |
| |
| if (fstat64 (fd, &st) == 0 && ! S_ISREG (st.st_mode)) |
| __libdwarf_error (&newdbg, error, DW_E_NO_REGFILE); |
| else |
| __libdwarf_error (&newdbg, error, DW_E_IO_ERROR); |
| } |
| else |
| { |
| /* Do the real work now that we have an ELF descriptor. */ |
| result = dwarf_elf_init (elf, access, errhand, errarg, dbg, error); |
| |
| /* If this failed, free the resources. */ |
| if (result != DW_DLV_OK) |
| elf_end (elf); |
| } |
| |
| return result; |
| } |