Mike Dodd | 8cfa702 | 2010-11-17 11:12:26 -0800 | [diff] [blame] | 1 | /** |
| 2 | * @file libutil++/bfd_spu_support.cpp |
| 3 | * Special BFD functions for processing a Cell BE SPU profile |
| 4 | * |
| 5 | * @remark Copyright 2007 OProfile authors |
| 6 | * @remark Read the file COPYING |
| 7 | * |
| 8 | * @author Maynard Johnson |
| 9 | * (C) Copyright IBM Corporation 2007 |
| 10 | */ |
| 11 | |
| 12 | #include "bfd_support.h" |
| 13 | #include "op_bfd.h" |
| 14 | #include "config.h" |
| 15 | #include "cverb.h" |
| 16 | |
| 17 | #include <stdlib.h> |
| 18 | #include <stdio.h> |
| 19 | #include <iostream> |
| 20 | #include <fstream> |
| 21 | #include <sstream> |
| 22 | #include <string> |
| 23 | #include <cstring> |
| 24 | #include <sys/types.h> |
| 25 | |
| 26 | struct spu_elf { |
| 27 | FILE * stream; |
| 28 | off_t spu_offset; |
| 29 | }; |
| 30 | |
| 31 | using namespace std; |
| 32 | |
| 33 | extern verbose vbfd; |
| 34 | |
| 35 | #ifdef HAVE_BFD_OPENR_IOVEC_WITH_7PARMS |
| 36 | |
| 37 | namespace { |
| 38 | |
| 39 | static void * |
| 40 | spu_bfd_iovec_open(bfd * nbfd, void * open_closure) |
| 41 | { |
| 42 | /* Checking nbfd isn't really necessary, except to silence |
| 43 | * compile warning. In fact, nbfd will always be non-NULL. |
| 44 | */ |
| 45 | if (nbfd) |
| 46 | return open_closure; |
| 47 | else |
| 48 | return NULL; |
| 49 | } |
| 50 | |
| 51 | static int |
| 52 | spu_bfd_iovec_close(bfd * nbfd, void * stream) |
| 53 | { |
| 54 | spu_elf * my_stream = (spu_elf *) stream; |
| 55 | |
| 56 | fclose(my_stream->stream); |
| 57 | free(my_stream); |
| 58 | /* Checking nbfd isn't really necessary, except to silence |
| 59 | * compile warning. In fact, nbfd will always be non-NULL. |
| 60 | */ |
| 61 | if (nbfd) |
| 62 | return 1; |
| 63 | else |
| 64 | return 0; |
| 65 | } |
| 66 | |
| 67 | static file_ptr |
| 68 | spu_bfd_iovec_pread(bfd * abfd, void * stream, void * buf, |
| 69 | file_ptr nbytes, file_ptr offset) |
| 70 | { |
| 71 | spu_elf * my_stream = (spu_elf *) stream; |
| 72 | fseek(my_stream->stream, my_stream->spu_offset + offset, |
| 73 | SEEK_SET); |
| 74 | nbytes = fread(buf, sizeof(char), nbytes, my_stream->stream); |
| 75 | /* Checking abfd isn't really necessary, except to silence |
| 76 | * compile warning. In fact, abfd will always be non-NULL. |
| 77 | */ |
| 78 | if (abfd) |
| 79 | return nbytes; |
| 80 | else |
| 81 | return 0; |
| 82 | } |
| 83 | } // namespace anon |
| 84 | #endif |
| 85 | |
| 86 | bfd * |
| 87 | spu_open_bfd(string const name, int fd, uint64_t offset_to_spu_elf) |
| 88 | { |
| 89 | |
| 90 | bfd * nbfd = NULL; |
| 91 | spu_elf * spu_elf_stream = (spu_elf *)malloc(sizeof(spu_elf)); |
| 92 | |
| 93 | FILE * fp = fdopen(fd, "r"); |
| 94 | spu_elf_stream->stream = fp; |
| 95 | spu_elf_stream->spu_offset = offset_to_spu_elf; |
| 96 | #ifdef HAVE_BFD_OPENR_IOVEC_WITH_7PARMS |
| 97 | nbfd = bfd_openr_iovec(strdup(name.c_str()), "elf32-spu", |
| 98 | spu_bfd_iovec_open, spu_elf_stream, |
| 99 | spu_bfd_iovec_pread, spu_bfd_iovec_close, NULL); |
| 100 | #else |
| 101 | ostringstream os; |
| 102 | os << "Attempt to process a Cell Broadband Engine SPU profile without" |
| 103 | << "proper BFD support.\n" |
| 104 | << "Rebuild the opreport utility with the correct BFD library.\n" |
| 105 | << "See the OProfile user manual for more information.\n"; |
| 106 | throw op_runtime_error(os.str()); |
| 107 | #endif |
| 108 | if (!nbfd) { |
| 109 | cverb << vbfd << "spu_open_bfd failed for " << name << endl; |
| 110 | return NULL; |
| 111 | } |
| 112 | |
| 113 | bfd_check_format(nbfd, bfd_object); |
| 114 | |
| 115 | return nbfd; |
| 116 | } |