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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 5191 | serge | 1 | /* simple-object-coff.c -- routines to manipulate XCOFF object files. |
| 2 | Copyright 2013 Free Software Foundation, Inc. |
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| 3 | Written by Ian Lance Taylor, Google and David Edelsohn, IBM. |
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| 4 | |||
| 5 | This program is free software; you can redistribute it and/or modify it |
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| 6 | under the terms of the GNU General Public License as published by the |
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| 7 | Free Software Foundation; either version 2, or (at your option) any |
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| 8 | later version. |
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| 9 | |||
| 10 | This program is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 13 | GNU General Public License for more details. |
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| 14 | |||
| 15 | You should have received a copy of the GNU General Public License |
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| 16 | along with this program; if not, write to the Free Software |
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| 17 | Foundation, 51 Franklin Street - Fifth Floor, |
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| 18 | Boston, MA 02110-1301, USA. */ |
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| 19 | |||
| 20 | #include "config.h" |
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| 21 | #include "libiberty.h" |
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| 22 | #include "simple-object.h" |
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| 23 | |||
| 24 | #include |
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| 25 | #include |
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| 26 | |||
| 27 | #ifdef HAVE_STDLIB_H |
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| 28 | #include |
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| 29 | #endif |
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| 30 | |||
| 31 | #ifdef HAVE_STDINT_H |
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| 32 | #include |
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| 33 | #endif |
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| 34 | |||
| 35 | #ifdef HAVE_STRING_H |
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| 36 | #include |
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| 37 | #endif |
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| 38 | |||
| 39 | #ifdef HAVE_INTTYPES_H |
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| 40 | #include |
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| 41 | #endif |
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| 42 | |||
| 43 | #include "simple-object-common.h" |
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| 44 | |||
| 45 | /* XCOFF structures and constants. */ |
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| 46 | |||
| 47 | /* XCOFF file header. */ |
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| 48 | |||
| 49 | struct external_filehdr |
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| 50 | { |
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| 51 | unsigned char f_magic[2]; /* magic number */ |
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| 52 | unsigned char f_nscns[2]; /* number of sections */ |
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| 53 | unsigned char f_timdat[4]; /* time & date stamp */ |
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| 54 | union |
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| 55 | { |
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| 56 | struct |
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| 57 | { |
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| 58 | unsigned char f_symptr[4]; /* file pointer to symtab */ |
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| 59 | unsigned char f_nsyms[4]; /* number of symtab entries */ |
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| 60 | unsigned char f_opthdr[2]; /* sizeof(optional hdr) */ |
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| 61 | unsigned char f_flags[2]; /* flags */ |
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| 62 | } xcoff32; |
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| 63 | struct |
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| 64 | { |
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| 65 | unsigned char f_symptr[8]; /* file pointer to symtab */ |
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| 66 | unsigned char f_opthdr[2]; /* sizeof(optional hdr) */ |
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| 67 | unsigned char f_flags[2]; /* flags */ |
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| 68 | unsigned char f_nsyms[4]; /* number of symtab entries */ |
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| 69 | } xcoff64; |
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| 70 | } u; |
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| 71 | }; |
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| 72 | |||
| 73 | /* Bits for filehdr f_flags field. */ |
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| 74 | |||
| 75 | #define F_EXEC (0x0002) |
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| 76 | |||
| 77 | /* The known values of f_magic in an XCOFF file header. */ |
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| 78 | |||
| 79 | #define U802WRMAGIC 0730 /* Writeable text segments. */ |
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| 80 | #define U802ROMAGIC 0735 /* Readonly sharable text segments. */ |
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| 81 | #define U802TOCMAGIC 0737 /* Readonly text segments and TOC. */ |
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| 82 | #define U803XTOCMAGIC 0757 /* Aix 4.3 64-bit XCOFF. */ |
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| 83 | #define U64_TOCMAGIC 0767 /* AIX 5+ 64-bit XCOFF. */ |
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| 84 | |||
| 85 | /* XCOFF section header. */ |
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| 86 | |||
| 87 | struct external_scnhdr |
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| 88 | { |
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| 89 | unsigned char s_name[8]; /* section name */ |
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| 90 | union |
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| 91 | { |
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| 92 | struct |
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| 93 | { |
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| 94 | unsigned char s_paddr[4]; /* physical address, aliased s_nlib */ |
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| 95 | unsigned char s_vaddr[4]; /* virtual address */ |
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| 96 | unsigned char s_size[4]; /* section size */ |
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| 97 | unsigned char s_scnptr[4]; /* file ptr to raw data for section */ |
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| 98 | unsigned char s_relptr[4]; /* file ptr to relocation */ |
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| 99 | unsigned char s_lnnoptr[4]; /* file ptr to line numbers */ |
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| 100 | unsigned char s_nreloc[2]; /* number of relocation entries */ |
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| 101 | unsigned char s_nlnno[2]; /* number of line number entries */ |
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| 102 | unsigned char s_flags[4]; /* flags */ |
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| 103 | } xcoff32; |
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| 104 | struct |
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| 105 | { |
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| 106 | unsigned char s_paddr[8]; /* physical address, aliased s_nlib */ |
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| 107 | unsigned char s_vaddr[8]; /* virtual address */ |
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| 108 | unsigned char s_size[8]; /* section size */ |
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| 109 | unsigned char s_scnptr[8]; /* file ptr to raw data for section */ |
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| 110 | unsigned char s_relptr[8]; /* file ptr to relocation */ |
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| 111 | unsigned char s_lnnoptr[8]; /* file ptr to line numbers */ |
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| 112 | unsigned char s_nreloc[4]; /* number of relocation entries */ |
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| 113 | unsigned char s_nlnno[4]; /* number of line number entries */ |
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| 114 | unsigned char s_flags[4]; /* flags */ |
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| 115 | } xcoff64; |
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| 116 | } u; |
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| 117 | }; |
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| 118 | |||
| 119 | #define SCNHSZ32 (40) |
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| 120 | #define SCNHSZ64 (68) |
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| 121 | |||
| 122 | /* The length of the s_name field in struct external_scnhdr. */ |
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| 123 | |||
| 124 | #define SCNNMLEN (8) |
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| 125 | |||
| 126 | /* Bits for scnhdr s_flags field. */ |
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| 127 | |||
| 128 | #define STYP_DATA 0x40 |
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| 129 | |||
| 130 | /* XCOFF symbol table entry. */ |
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| 131 | |||
| 132 | |||
| 133 | #define N_SYMNMLEN (8) /* # characters in a symbol name */ |
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| 134 | |||
| 135 | /* The format of an XCOFF symbol-table entry. */ |
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| 136 | struct external_syment |
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| 137 | { |
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| 138 | union { |
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| 139 | struct { |
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| 140 | union { |
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| 141 | /* The name of the symbol. There is an implicit null character |
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| 142 | after the end of the array. */ |
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| 143 | char n_name[N_SYMNMLEN]; |
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| 144 | struct { |
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| 145 | /* If n_zeroes is zero, n_offset is the offset the name from |
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| 146 | the start of the string table. */ |
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| 147 | unsigned char n_zeroes[4]; |
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| 148 | unsigned char n_offset[4]; |
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| 149 | } n; |
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| 150 | } n; |
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| 151 | |||
| 152 | /* The symbol's value. */ |
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| 153 | unsigned char n_value[4]; |
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| 154 | } xcoff32; |
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| 155 | struct { |
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| 156 | /* The symbol's value. */ |
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| 157 | unsigned char n_value[8]; |
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| 158 | |||
| 159 | /* The offset of the symbol from the start of the string table. */ |
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| 160 | unsigned char n_offset[4]; |
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| 161 | } xcoff64; |
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| 162 | } u; |
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| 163 | |||
| 164 | /* The number of the section to which this symbol belongs. */ |
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| 165 | unsigned char n_scnum[2]; |
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| 166 | |||
| 167 | /* The type of symbol. (It can be interpreted as an n_lang |
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| 168 | and an n_cpu byte, but we don't care about that here.) */ |
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| 169 | unsigned char n_type[2]; |
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| 170 | |||
| 171 | /* The class of symbol (a C_* value). */ |
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| 172 | unsigned char n_sclass[1]; |
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| 173 | |||
| 174 | /* The number of auxiliary symbols attached to this entry. */ |
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| 175 | unsigned char n_numaux[1]; |
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| 176 | }; |
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| 177 | |||
| 178 | #define SYMESZ (18) |
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| 179 | |||
| 180 | /* Length allowed for filename in aux sym format 4. */ |
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| 181 | |||
| 182 | #define FILNMLEN (14) |
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| 183 | |||
| 184 | /* Omits x_sym and other unused variants. */ |
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| 185 | |||
| 186 | union external_auxent |
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| 187 | { |
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| 188 | /* Aux sym format 4: file. */ |
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| 189 | union |
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| 190 | { |
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| 191 | char x_fname[FILNMLEN]; |
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| 192 | struct |
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| 193 | { |
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| 194 | unsigned char x_zeroes[4]; |
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| 195 | unsigned char x_offset[4]; |
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| 196 | unsigned char x_pad[FILNMLEN-8]; |
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| 197 | unsigned char x_ftype; |
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| 198 | } _x; |
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| 199 | } x_file; |
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| 200 | /* Aux sym format 5: section. */ |
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| 201 | struct |
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| 202 | { |
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| 203 | unsigned char x_scnlen[4]; /* section length */ |
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| 204 | unsigned char x_nreloc[2]; /* # relocation entries */ |
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| 205 | unsigned char x_nlinno[2]; /* # line numbers */ |
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| 206 | } x_scn; |
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| 207 | /* CSECT auxiliary entry. */ |
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| 208 | union |
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| 209 | { |
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| 210 | struct |
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| 211 | { |
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| 212 | struct |
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| 213 | { |
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| 214 | unsigned char x_scnlen[4]; /* csect length */ |
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| 215 | unsigned char x_parmhash[4]; /* parm type hash index */ |
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| 216 | unsigned char x_snhash[2]; /* sect num with parm hash */ |
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| 217 | unsigned char x_smtyp; /* symbol align and type */ |
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| 218 | unsigned char x_smclas; /* storage mapping class */ |
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| 219 | unsigned char x_stab; /* dbx stab info index */ |
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| 220 | unsigned char x_snstab[2]; /* sect num with dbx stab */ |
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| 221 | } x_csect; |
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| 222 | } xcoff32; |
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| 223 | struct |
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| 224 | { |
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| 225 | struct |
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| 226 | { |
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| 227 | unsigned char x_scnlen_lo[4]; /* csect length */ |
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| 228 | unsigned char x_parmhash[4]; /* parm type hash index */ |
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| 229 | unsigned char x_snhash[2]; /* sect num with parm hash */ |
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| 230 | unsigned char x_smtyp; /* symbol align and type */ |
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| 231 | unsigned char x_smclas; /* storage mapping class */ |
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| 232 | unsigned char x_scnlen_hi[4]; |
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| 233 | unsigned char pad; |
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| 234 | unsigned char x_auxtype; |
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| 235 | } x_csect; |
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| 236 | } xcoff64; |
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| 237 | } u; |
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| 238 | /* SECTION/DWARF auxiliary entry. */ |
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| 239 | struct |
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| 240 | { |
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| 241 | unsigned char x_scnlen[4]; /* section length */ |
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| 242 | unsigned char pad1[4]; |
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| 243 | unsigned char x_nreloc[4]; /* number RLDs */ |
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| 244 | } x_sect; |
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| 245 | }; |
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| 246 | |||
| 247 | /* Symbol-related constants. */ |
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| 248 | |||
| 249 | #define N_DEBUG (-2) |
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| 250 | #define IMAGE_SYM_TYPE_NULL (0) |
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| 251 | #define IMAGE_SYM_DTYPE_NULL (0) |
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| 252 | #define IMAGE_SYM_CLASS_STATIC (3) |
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| 253 | #define IMAGE_SYM_CLASS_FILE (103) |
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| 254 | |||
| 255 | #define IMAGE_SYM_TYPE \ |
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| 256 | ((IMAGE_SYM_DTYPE_NULL << 4) | IMAGE_SYM_TYPE_NULL) |
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| 257 | |||
| 258 | #define C_STAT (3) |
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| 259 | #define C_FILE (103) |
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| 260 | |||
| 261 | /* Private data for an simple_object_read. */ |
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| 262 | |||
| 263 | struct simple_object_xcoff_read |
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| 264 | { |
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| 265 | /* Magic number. */ |
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| 266 | unsigned short magic; |
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| 267 | /* Number of sections. */ |
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| 268 | unsigned short nscns; |
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| 269 | /* File offset of symbol table. */ |
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| 270 | off_t symptr; |
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| 271 | /* Number of symbol table entries. */ |
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| 272 | unsigned int nsyms; |
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| 273 | /* Flags. */ |
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| 274 | unsigned short flags; |
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| 275 | /* Offset of section headers in file. */ |
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| 276 | off_t scnhdr_offset; |
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| 277 | }; |
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| 278 | |||
| 279 | /* Private data for an simple_object_attributes. */ |
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| 280 | |||
| 281 | struct simple_object_xcoff_attributes |
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| 282 | { |
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| 283 | /* Magic number. */ |
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| 284 | unsigned short magic; |
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| 285 | /* Flags. */ |
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| 286 | unsigned short flags; |
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| 287 | }; |
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| 288 | |||
| 289 | /* See if we have a XCOFF file. */ |
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| 290 | |||
| 291 | static void * |
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| 292 | simple_object_xcoff_match (unsigned char header[SIMPLE_OBJECT_MATCH_HEADER_LEN], |
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| 293 | int descriptor, off_t offset, |
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| 294 | const char *segment_name ATTRIBUTE_UNUSED, |
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| 295 | const char **errmsg, int *err) |
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| 296 | { |
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| 297 | unsigned short magic; |
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| 298 | unsigned short (*fetch_16) (const unsigned char *); |
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| 299 | unsigned int (*fetch_32) (const unsigned char *); |
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| 300 | ulong_type (*fetch_64) (const unsigned char *); |
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| 301 | unsigned char hdrbuf[sizeof (struct external_filehdr)]; |
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| 302 | struct simple_object_xcoff_read *ocr; |
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| 303 | int u64; |
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| 304 | |||
| 305 | magic = simple_object_fetch_big_16 (header); |
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| 306 | |||
| 307 | if (magic != U802TOCMAGIC && magic != U64_TOCMAGIC) |
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| 308 | { |
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| 309 | *errmsg = NULL; |
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| 310 | *err = 0; |
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| 311 | return NULL; |
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| 312 | } |
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| 313 | |||
| 314 | fetch_16 = simple_object_fetch_big_16; |
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| 315 | fetch_32 = simple_object_fetch_big_32; |
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| 316 | fetch_64 = simple_object_fetch_big_64; |
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| 317 | |||
| 318 | if (!simple_object_internal_read (descriptor, offset, hdrbuf, sizeof hdrbuf, |
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| 319 | errmsg, err)) |
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| 320 | return NULL; |
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| 321 | |||
| 322 | u64 = magic == U64_TOCMAGIC; |
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| 323 | |||
| 324 | ocr = XNEW (struct simple_object_xcoff_read); |
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| 325 | ocr->magic = magic; |
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| 326 | ocr->nscns = fetch_16 (hdrbuf + offsetof (struct external_filehdr, f_nscns)); |
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| 327 | if (u64) |
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| 328 | { |
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| 329 | ocr->symptr = fetch_64 (hdrbuf |
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| 330 | + offsetof (struct external_filehdr, |
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| 331 | u.xcoff64.f_symptr)); |
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| 332 | ocr->nsyms = fetch_32 (hdrbuf + offsetof (struct external_filehdr, |
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| 333 | u.xcoff64.f_nsyms)); |
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| 334 | ocr->scnhdr_offset = (sizeof (struct external_filehdr) |
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| 335 | + fetch_16 (hdrbuf + offsetof (struct external_filehdr, |
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| 336 | u.xcoff64.f_opthdr))); |
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| 337 | |||
| 338 | } |
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| 339 | else |
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| 340 | { |
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| 341 | ocr->symptr = fetch_32 (hdrbuf |
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| 342 | + offsetof (struct external_filehdr, |
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| 343 | u.xcoff32.f_symptr)); |
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| 344 | ocr->nsyms = fetch_32 (hdrbuf + offsetof (struct external_filehdr, |
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| 345 | u.xcoff32.f_nsyms)); |
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| 346 | ocr->scnhdr_offset = (sizeof (struct external_filehdr) - 4 |
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| 347 | + fetch_16 (hdrbuf + offsetof (struct external_filehdr, |
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| 348 | u.xcoff32.f_opthdr))); |
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| 349 | |||
| 350 | } |
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| 351 | |||
| 352 | return (void *) ocr; |
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| 353 | } |
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| 354 | |||
| 355 | /* Read the string table in a XCOFF file. */ |
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| 356 | |||
| 357 | static char * |
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| 358 | simple_object_xcoff_read_strtab (simple_object_read *sobj, size_t *strtab_size, |
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| 359 | const char **errmsg, int *err) |
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| 360 | { |
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| 361 | struct simple_object_xcoff_read *ocr = |
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| 362 | (struct simple_object_xcoff_read *) sobj->data; |
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| 363 | off_t strtab_offset; |
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| 364 | unsigned char strsizebuf[4]; |
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| 365 | size_t strsize; |
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| 366 | char *strtab; |
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| 367 | |||
| 368 | strtab_offset = sobj->offset + ocr->symptr |
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| 369 | + ocr->nsyms * SYMESZ; |
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| 370 | if (!simple_object_internal_read (sobj->descriptor, strtab_offset, |
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| 371 | strsizebuf, 4, errmsg, err)) |
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| 372 | return NULL; |
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| 373 | strsize = simple_object_fetch_big_32 (strsizebuf); |
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| 374 | strtab = XNEWVEC (char, strsize); |
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| 375 | if (!simple_object_internal_read (sobj->descriptor, strtab_offset, |
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| 376 | (unsigned char *) strtab, strsize, errmsg, |
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| 377 | err)) |
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| 378 | { |
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| 379 | XDELETEVEC (strtab); |
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| 380 | return NULL; |
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| 381 | } |
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| 382 | *strtab_size = strsize; |
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| 383 | return strtab; |
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| 384 | } |
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| 385 | |||
| 386 | /* Find all sections in a XCOFF file. */ |
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| 387 | |||
| 388 | static const char * |
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| 389 | simple_object_xcoff_find_sections (simple_object_read *sobj, |
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| 390 | int (*pfn) (void *, const char *, |
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| 391 | off_t offset, off_t length), |
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| 392 | void *data, |
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| 393 | int *err) |
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| 394 | { |
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| 395 | struct simple_object_xcoff_read *ocr = |
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| 396 | (struct simple_object_xcoff_read *) sobj->data; |
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| 397 | int u64 = ocr->magic == U64_TOCMAGIC; |
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| 398 | size_t scnhdr_size; |
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| 399 | unsigned char *scnbuf; |
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| 400 | const char *errmsg; |
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| 401 | unsigned int (*fetch_32) (const unsigned char *); |
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| 402 | ulong_type (*fetch_64) (const unsigned char *); |
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| 403 | unsigned int nscns; |
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| 404 | char *strtab; |
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| 405 | size_t strtab_size; |
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| 406 | unsigned int i; |
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| 407 | |||
| 408 | scnhdr_size = u64 ? SCNHSZ64 : SCNHSZ32; |
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| 409 | scnbuf = XNEWVEC (unsigned char, scnhdr_size * ocr->nscns); |
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| 410 | if (!simple_object_internal_read (sobj->descriptor, |
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| 411 | sobj->offset + ocr->scnhdr_offset, |
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| 412 | scnbuf, scnhdr_size * ocr->nscns, &errmsg, |
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| 413 | err)) |
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| 414 | { |
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| 415 | XDELETEVEC (scnbuf); |
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| 416 | return errmsg; |
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| 417 | } |
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| 418 | |||
| 419 | fetch_32 = simple_object_fetch_big_32; |
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| 420 | fetch_64 = simple_object_fetch_big_64; |
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| 421 | |||
| 422 | nscns = ocr->nscns; |
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| 423 | strtab = NULL; |
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| 424 | strtab_size = 0; |
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| 425 | for (i = 0; i < nscns; ++i) |
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| 426 | { |
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| 427 | unsigned char *scnhdr; |
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| 428 | unsigned char *scnname; |
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| 429 | char namebuf[SCNNMLEN + 1]; |
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| 430 | char *name; |
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| 431 | off_t scnptr; |
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| 432 | unsigned int size; |
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| 433 | |||
| 434 | scnhdr = scnbuf + i * scnhdr_size; |
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| 435 | scnname = scnhdr + offsetof (struct external_scnhdr, s_name); |
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| 436 | memcpy (namebuf, scnname, SCNNMLEN); |
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| 437 | namebuf[SCNNMLEN] = '\0'; |
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| 438 | name = &namebuf[0]; |
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| 439 | if (namebuf[0] == '/') |
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| 440 | { |
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| 441 | size_t strindex; |
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| 442 | char *end; |
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| 443 | |||
| 444 | strindex = strtol (namebuf + 1, &end, 10); |
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| 445 | if (*end == '\0') |
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| 446 | { |
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| 447 | /* The real section name is found in the string |
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| 448 | table. */ |
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| 449 | if (strtab == NULL) |
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| 450 | { |
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| 451 | strtab = simple_object_xcoff_read_strtab (sobj, |
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| 452 | &strtab_size, |
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| 453 | &errmsg, err); |
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| 454 | if (strtab == NULL) |
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| 455 | { |
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| 456 | XDELETEVEC (scnbuf); |
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| 457 | return errmsg; |
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| 458 | } |
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| 459 | } |
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| 460 | |||
| 461 | if (strindex < 4 || strindex >= strtab_size) |
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| 462 | { |
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| 463 | XDELETEVEC (strtab); |
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| 464 | XDELETEVEC (scnbuf); |
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| 465 | *err = 0; |
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| 466 | return "section string index out of range"; |
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| 467 | } |
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| 468 | |||
| 469 | name = strtab + strindex; |
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| 470 | } |
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| 471 | } |
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| 472 | |||
| 473 | if (u64) |
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| 474 | { |
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| 475 | scnptr = fetch_64 (scnhdr + offsetof (struct external_scnhdr, |
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| 476 | u.xcoff64.s_scnptr)); |
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| 477 | size = fetch_64 (scnhdr + offsetof (struct external_scnhdr, |
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| 478 | u.xcoff64.s_size)); |
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| 479 | } |
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| 480 | else |
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| 481 | { |
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| 482 | scnptr = fetch_32 (scnhdr + offsetof (struct external_scnhdr, |
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| 483 | u.xcoff32.s_scnptr)); |
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| 484 | size = fetch_32 (scnhdr + offsetof (struct external_scnhdr, |
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| 485 | u.xcoff32.s_size)); |
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| 486 | } |
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| 487 | |||
| 488 | if (!(*pfn) (data, name, scnptr, size)) |
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| 489 | break; |
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| 490 | } |
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| 491 | |||
| 492 | if (strtab != NULL) |
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| 493 | XDELETEVEC (strtab); |
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| 494 | XDELETEVEC (scnbuf); |
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| 495 | |||
| 496 | return NULL; |
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| 497 | } |
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| 498 | |||
| 499 | /* Fetch the attributes for an simple_object_read. */ |
||
| 500 | |||
| 501 | static void * |
||
| 502 | simple_object_xcoff_fetch_attributes (simple_object_read *sobj, |
||
| 503 | const char **errmsg ATTRIBUTE_UNUSED, |
||
| 504 | int *err ATTRIBUTE_UNUSED) |
||
| 505 | { |
||
| 506 | struct simple_object_xcoff_read *ocr = |
||
| 507 | (struct simple_object_xcoff_read *) sobj->data; |
||
| 508 | struct simple_object_xcoff_attributes *ret; |
||
| 509 | |||
| 510 | ret = XNEW (struct simple_object_xcoff_attributes); |
||
| 511 | ret->magic = ocr->magic; |
||
| 512 | ret->flags = ocr->flags; |
||
| 513 | return ret; |
||
| 514 | } |
||
| 515 | |||
| 516 | /* Release the private data for an simple_object_read. */ |
||
| 517 | |||
| 518 | static void |
||
| 519 | simple_object_xcoff_release_read (void *data) |
||
| 520 | { |
||
| 521 | XDELETE (data); |
||
| 522 | } |
||
| 523 | |||
| 524 | /* Compare two attributes structures. */ |
||
| 525 | |||
| 526 | static const char * |
||
| 527 | simple_object_xcoff_attributes_merge (void *todata, void *fromdata, int *err) |
||
| 528 | { |
||
| 529 | struct simple_object_xcoff_attributes *to = |
||
| 530 | (struct simple_object_xcoff_attributes *) todata; |
||
| 531 | struct simple_object_xcoff_attributes *from = |
||
| 532 | (struct simple_object_xcoff_attributes *) fromdata; |
||
| 533 | |||
| 534 | if (to->magic != from->magic) |
||
| 535 | { |
||
| 536 | *err = 0; |
||
| 537 | return "XCOFF object format mismatch"; |
||
| 538 | } |
||
| 539 | return NULL; |
||
| 540 | } |
||
| 541 | |||
| 542 | /* Release the private data for an attributes structure. */ |
||
| 543 | |||
| 544 | static void |
||
| 545 | simple_object_xcoff_release_attributes (void *data) |
||
| 546 | { |
||
| 547 | XDELETE (data); |
||
| 548 | } |
||
| 549 | |||
| 550 | /* Prepare to write out a file. */ |
||
| 551 | |||
| 552 | static void * |
||
| 553 | simple_object_xcoff_start_write (void *attributes_data, |
||
| 554 | const char **errmsg ATTRIBUTE_UNUSED, |
||
| 555 | int *err ATTRIBUTE_UNUSED) |
||
| 556 | { |
||
| 557 | struct simple_object_xcoff_attributes *attrs = |
||
| 558 | (struct simple_object_xcoff_attributes *) attributes_data; |
||
| 559 | struct simple_object_xcoff_attributes *ret; |
||
| 560 | |||
| 561 | /* We're just going to record the attributes, but we need to make a |
||
| 562 | copy because the user may delete them. */ |
||
| 563 | ret = XNEW (struct simple_object_xcoff_attributes); |
||
| 564 | *ret = *attrs; |
||
| 565 | return ret; |
||
| 566 | } |
||
| 567 | |||
| 568 | /* Write out a XCOFF filehdr. */ |
||
| 569 | |||
| 570 | static int |
||
| 571 | simple_object_xcoff_write_filehdr (simple_object_write *sobj, int descriptor, |
||
| 572 | unsigned int nscns, size_t symtab_offset, |
||
| 573 | unsigned int nsyms, const char **errmsg, |
||
| 574 | int *err) |
||
| 575 | { |
||
| 576 | struct simple_object_xcoff_attributes *attrs = |
||
| 577 | (struct simple_object_xcoff_attributes *) sobj->data; |
||
| 578 | int u64 = attrs->magic == U64_TOCMAGIC; |
||
| 579 | unsigned char hdrbuf[sizeof (struct external_filehdr)]; |
||
| 580 | unsigned char *hdr; |
||
| 581 | void (*set_16) (unsigned char *, unsigned short); |
||
| 582 | void (*set_32) (unsigned char *, unsigned int); |
||
| 583 | void (*set_64) (unsigned char *, ulong_type); |
||
| 584 | |||
| 585 | hdr = &hdrbuf[0]; |
||
| 586 | |||
| 587 | set_16 = simple_object_set_big_16; |
||
| 588 | set_32 = simple_object_set_big_32; |
||
| 589 | set_64 = simple_object_set_big_64; |
||
| 590 | |||
| 591 | memset (hdr, 0, sizeof (struct external_filehdr)); |
||
| 592 | |||
| 593 | set_16 (hdr + offsetof (struct external_filehdr, f_magic), attrs->magic); |
||
| 594 | set_16 (hdr + offsetof (struct external_filehdr, f_nscns), nscns); |
||
| 595 | /* f_timdat left as zero. */ |
||
| 596 | if (u64) |
||
| 597 | { |
||
| 598 | set_64 (hdr + offsetof (struct external_filehdr, u.xcoff64.f_symptr), |
||
| 599 | symtab_offset); |
||
| 600 | set_32 (hdr + offsetof (struct external_filehdr, u.xcoff64.f_nsyms), |
||
| 601 | nsyms); |
||
| 602 | /* f_opthdr left as zero. */ |
||
| 603 | set_16 (hdr + offsetof (struct external_filehdr, u.xcoff64.f_flags), |
||
| 604 | attrs->flags); |
||
| 605 | } |
||
| 606 | else |
||
| 607 | { |
||
| 608 | set_32 (hdr + offsetof (struct external_filehdr, u.xcoff64.f_symptr), |
||
| 609 | symtab_offset); |
||
| 610 | set_32 (hdr + offsetof (struct external_filehdr, u.xcoff64.f_nsyms), |
||
| 611 | nsyms); |
||
| 612 | /* f_opthdr left as zero. */ |
||
| 613 | set_16 (hdr + offsetof (struct external_filehdr, u.xcoff64.f_flags), |
||
| 614 | attrs->flags); |
||
| 615 | } |
||
| 616 | |||
| 617 | return simple_object_internal_write (descriptor, 0, hdrbuf, |
||
| 618 | sizeof (struct external_filehdr), |
||
| 619 | errmsg, err); |
||
| 620 | } |
||
| 621 | |||
| 622 | /* Write out a XCOFF section header. */ |
||
| 623 | |||
| 624 | static int |
||
| 625 | simple_object_xcoff_write_scnhdr (simple_object_write *sobj, |
||
| 626 | int descriptor, |
||
| 627 | const char *name, size_t *name_offset, |
||
| 628 | off_t scnhdr_offset, size_t scnsize, |
||
| 629 | off_t offset, unsigned int align, |
||
| 630 | const char **errmsg, int *err) |
||
| 631 | { |
||
| 632 | struct simple_object_xcoff_read *ocr = |
||
| 633 | (struct simple_object_xcoff_read *) sobj->data; |
||
| 634 | int u64 = ocr->magic == U64_TOCMAGIC; |
||
| 635 | void (*set_32) (unsigned char *, unsigned int); |
||
| 636 | void (*set_64) (unsigned char *, unsigned int); |
||
| 637 | unsigned char hdrbuf[sizeof (struct external_scnhdr)]; |
||
| 638 | unsigned char *hdr; |
||
| 639 | size_t namelen; |
||
| 640 | unsigned int flags; |
||
| 641 | |||
| 642 | set_32 = simple_object_set_big_32; |
||
| 643 | set_64 = simple_object_set_big_32; |
||
| 644 | |||
| 645 | memset (hdrbuf, 0, sizeof hdrbuf); |
||
| 646 | hdr = &hdrbuf[0]; |
||
| 647 | |||
| 648 | namelen = strlen (name); |
||
| 649 | if (namelen <= SCNNMLEN) |
||
| 650 | strncpy ((char *) hdr + offsetof (struct external_scnhdr, s_name), |
||
| 651 | name, SCNNMLEN); |
||
| 652 | else |
||
| 653 | { |
||
| 654 | snprintf ((char *) hdr + offsetof (struct external_scnhdr, s_name), |
||
| 655 | SCNNMLEN, "/%lu", (unsigned long) *name_offset); |
||
| 656 | *name_offset += namelen + 1; |
||
| 657 | } |
||
| 658 | |||
| 659 | /* s_paddr left as zero. */ |
||
| 660 | /* s_vaddr left as zero. */ |
||
| 661 | if (u64) |
||
| 662 | { |
||
| 663 | set_64 (hdr + offsetof (struct external_scnhdr, u.xcoff64.s_size), |
||
| 664 | scnsize); |
||
| 665 | set_64 (hdr + offsetof (struct external_scnhdr, u.xcoff64.s_scnptr), |
||
| 666 | offset); |
||
| 667 | } |
||
| 668 | else |
||
| 669 | { |
||
| 670 | set_32 (hdr + offsetof (struct external_scnhdr, u.xcoff32.s_size), |
||
| 671 | scnsize); |
||
| 672 | set_32 (hdr + offsetof (struct external_scnhdr, u.xcoff32.s_scnptr), |
||
| 673 | offset); |
||
| 674 | } |
||
| 675 | /* s_relptr left as zero. */ |
||
| 676 | /* s_lnnoptr left as zero. */ |
||
| 677 | /* s_nreloc left as zero. */ |
||
| 678 | /* s_nlnno left as zero. */ |
||
| 679 | flags = STYP_DATA; |
||
| 680 | if (align > 13) |
||
| 681 | align = 13; |
||
| 682 | if (u64) |
||
| 683 | set_32 (hdr + offsetof (struct external_scnhdr, u.xcoff64.s_flags), flags); |
||
| 684 | else |
||
| 685 | set_32 (hdr + offsetof (struct external_scnhdr, u.xcoff32.s_flags), flags); |
||
| 686 | |||
| 687 | return simple_object_internal_write (descriptor, scnhdr_offset, hdrbuf, |
||
| 688 | u64 ? SCNHSZ64 : SCNHSZ32, |
||
| 689 | errmsg, err); |
||
| 690 | } |
||
| 691 | |||
| 692 | /* Write out a complete XCOFF file. */ |
||
| 693 | |||
| 694 | static const char * |
||
| 695 | simple_object_xcoff_write_to_file (simple_object_write *sobj, int descriptor, |
||
| 696 | int *err) |
||
| 697 | { |
||
| 698 | struct simple_object_xcoff_read *ocr = |
||
| 699 | (struct simple_object_xcoff_read *) sobj->data; |
||
| 700 | int u64 = ocr->magic == U64_TOCMAGIC; |
||
| 701 | unsigned int nscns, secnum; |
||
| 702 | simple_object_write_section *section; |
||
| 703 | off_t scnhdr_offset; |
||
| 704 | size_t symtab_offset; |
||
| 705 | off_t secsym_offset; |
||
| 706 | unsigned int nsyms; |
||
| 707 | size_t offset; |
||
| 708 | size_t name_offset; |
||
| 709 | const char *errmsg; |
||
| 710 | unsigned char strsizebuf[4]; |
||
| 711 | /* The interface doesn't give us access to the name of the input file |
||
| 712 | yet. We want to use its basename for the FILE symbol. This is |
||
| 713 | what 'gas' uses when told to assemble from stdin. */ |
||
| 714 | const char *source_filename = "fake"; |
||
| 715 | size_t sflen; |
||
| 716 | union |
||
| 717 | { |
||
| 718 | struct external_syment sym; |
||
| 719 | union external_auxent aux; |
||
| 720 | } syms[2]; |
||
| 721 | void (*set_16) (unsigned char *, unsigned short); |
||
| 722 | void (*set_32) (unsigned char *, unsigned int); |
||
| 723 | |||
| 724 | set_16 = simple_object_set_big_16; |
||
| 725 | set_32 = simple_object_set_big_32; |
||
| 726 | |||
| 727 | nscns = 0; |
||
| 728 | for (section = sobj->sections; section != NULL; section = section->next) |
||
| 729 | ++nscns; |
||
| 730 | |||
| 731 | scnhdr_offset = sizeof (struct external_filehdr) - (u64 ? 4 : 0); |
||
| 732 | offset = scnhdr_offset + nscns * (u64 ? SCNHSZ64 : SCNHSZ32); |
||
| 733 | name_offset = 4; |
||
| 734 | for (section = sobj->sections; section != NULL; section = section->next) |
||
| 735 | { |
||
| 736 | size_t mask; |
||
| 737 | size_t new_offset; |
||
| 738 | size_t scnsize; |
||
| 739 | struct simple_object_write_section_buffer *buffer; |
||
| 740 | |||
| 741 | mask = (1U << section->align) - 1; |
||
| 742 | new_offset = offset & mask; |
||
| 743 | new_offset &= ~ mask; |
||
| 744 | while (new_offset > offset) |
||
| 745 | { |
||
| 746 | unsigned char zeroes[16]; |
||
| 747 | size_t write; |
||
| 748 | |||
| 749 | memset (zeroes, 0, sizeof zeroes); |
||
| 750 | write = new_offset - offset; |
||
| 751 | if (write > sizeof zeroes) |
||
| 752 | write = sizeof zeroes; |
||
| 753 | if (!simple_object_internal_write (descriptor, offset, zeroes, write, |
||
| 754 | &errmsg, err)) |
||
| 755 | return errmsg; |
||
| 756 | } |
||
| 757 | |||
| 758 | scnsize = 0; |
||
| 759 | for (buffer = section->buffers; buffer != NULL; buffer = buffer->next) |
||
| 760 | { |
||
| 761 | if (!simple_object_internal_write (descriptor, offset + scnsize, |
||
| 762 | ((const unsigned char *) |
||
| 763 | buffer->buffer), |
||
| 764 | buffer->size, &errmsg, err)) |
||
| 765 | return errmsg; |
||
| 766 | scnsize += buffer->size; |
||
| 767 | } |
||
| 768 | |||
| 769 | if (!simple_object_xcoff_write_scnhdr (sobj, descriptor, section->name, |
||
| 770 | &name_offset, scnhdr_offset, |
||
| 771 | scnsize, offset, section->align, |
||
| 772 | &errmsg, err)) |
||
| 773 | return errmsg; |
||
| 774 | |||
| 775 | scnhdr_offset += u64 ? SCNHSZ64 : SCNHSZ32; |
||
| 776 | offset += scnsize; |
||
| 777 | } |
||
| 778 | |||
| 779 | /* Symbol table is always half-word aligned. */ |
||
| 780 | offset += (offset & 1); |
||
| 781 | /* There is a file symbol and a section symbol per section, |
||
| 782 | and each of these has a single auxiliary symbol following. */ |
||
| 783 | nsyms = 2 * (nscns + 1); |
||
| 784 | symtab_offset = offset; |
||
| 785 | /* Advance across space reserved for symbol table to locate |
||
| 786 | start of string table. */ |
||
| 787 | offset += nsyms * SYMESZ; |
||
| 788 | |||
| 789 | /* Write out file symbol. */ |
||
| 790 | memset (&syms[0], 0, sizeof (syms)); |
||
| 791 | if (!u64) |
||
| 792 | strcpy ((char *)&syms[0].sym.u.xcoff32.n.n_name[0], ".file"); |
||
| 793 | set_16 (&syms[0].sym.n_scnum[0], N_DEBUG); |
||
| 794 | set_16 (&syms[0].sym.n_type[0], IMAGE_SYM_TYPE); |
||
| 795 | syms[0].sym.n_sclass[0] = C_FILE; |
||
| 796 | syms[0].sym.n_numaux[0] = 1; |
||
| 797 | /* The name need not be nul-terminated if it fits into the x_fname field |
||
| 798 | directly, but must be if it has to be placed into the string table. */ |
||
| 799 | sflen = strlen (source_filename); |
||
| 800 | if (sflen <= FILNMLEN) |
||
| 801 | memcpy (&syms[1].aux.x_file.x_fname[0], source_filename, sflen); |
||
| 802 | else |
||
| 803 | { |
||
| 804 | set_32 (&syms[1].aux.x_file._x.x_offset[0], name_offset); |
||
| 805 | if (!simple_object_internal_write (descriptor, offset + name_offset, |
||
| 806 | ((const unsigned char *) |
||
| 807 | source_filename), |
||
| 808 | sflen + 1, &errmsg, err)) |
||
| 809 | return errmsg; |
||
| 810 | name_offset += strlen (source_filename) + 1; |
||
| 811 | } |
||
| 812 | if (!simple_object_internal_write (descriptor, symtab_offset, |
||
| 813 | (const unsigned char *) &syms[0], |
||
| 814 | sizeof (syms), &errmsg, err)) |
||
| 815 | return errmsg; |
||
| 816 | |||
| 817 | /* Write the string table length, followed by the strings and section |
||
| 818 | symbols in step with each other. */ |
||
| 819 | set_32 (strsizebuf, name_offset); |
||
| 820 | if (!simple_object_internal_write (descriptor, offset, strsizebuf, 4, |
||
| 821 | &errmsg, err)) |
||
| 822 | return errmsg; |
||
| 823 | |||
| 824 | name_offset = 4; |
||
| 825 | secsym_offset = symtab_offset + sizeof (syms); |
||
| 826 | memset (&syms[0], 0, sizeof (syms)); |
||
| 827 | set_16 (&syms[0].sym.n_type[0], IMAGE_SYM_TYPE); |
||
| 828 | syms[0].sym.n_sclass[0] = C_STAT; |
||
| 829 | syms[0].sym.n_numaux[0] = 1; |
||
| 830 | secnum = 1; |
||
| 831 | |||
| 832 | for (section = sobj->sections; section != NULL; section = section->next) |
||
| 833 | { |
||
| 834 | size_t namelen; |
||
| 835 | size_t scnsize; |
||
| 836 | struct simple_object_write_section_buffer *buffer; |
||
| 837 | |||
| 838 | namelen = strlen (section->name); |
||
| 839 | set_16 (&syms[0].sym.n_scnum[0], secnum++); |
||
| 840 | scnsize = 0; |
||
| 841 | for (buffer = section->buffers; buffer != NULL; buffer = buffer->next) |
||
| 842 | scnsize += buffer->size; |
||
| 843 | set_32 (&syms[1].aux.x_scn.x_scnlen[0], scnsize); |
||
| 844 | if (namelen > SCNNMLEN) |
||
| 845 | { |
||
| 846 | set_32 (&syms[0].sym.u.xcoff32.n.n.n_zeroes[0], 0); |
||
| 847 | set_32 (&syms[0].sym.u.xcoff32.n.n.n_offset[0], name_offset); |
||
| 848 | if (!simple_object_internal_write (descriptor, offset + name_offset, |
||
| 849 | ((const unsigned char *) |
||
| 850 | section->name), |
||
| 851 | namelen + 1, &errmsg, err)) |
||
| 852 | return errmsg; |
||
| 853 | name_offset += namelen + 1; |
||
| 854 | } |
||
| 855 | else |
||
| 856 | { |
||
| 857 | memcpy (&syms[0].sym.u.xcoff32.n.n_name[0], section->name, |
||
| 858 | strlen (section->name)); |
||
| 859 | memset (&syms[0].sym.u.xcoff32.n.n_name[strlen (section->name)], 0, |
||
| 860 | N_SYMNMLEN - strlen (section->name)); |
||
| 861 | } |
||
| 862 | |||
| 863 | if (!simple_object_internal_write (descriptor, secsym_offset, |
||
| 864 | (const unsigned char *) &syms[0], |
||
| 865 | sizeof (syms), &errmsg, err)) |
||
| 866 | return errmsg; |
||
| 867 | secsym_offset += sizeof (syms); |
||
| 868 | } |
||
| 869 | |||
| 870 | if (!simple_object_xcoff_write_filehdr (sobj, descriptor, nscns, |
||
| 871 | symtab_offset, nsyms, &errmsg, err)) |
||
| 872 | return errmsg; |
||
| 873 | |||
| 874 | return NULL; |
||
| 875 | } |
||
| 876 | |||
| 877 | /* Release the private data for an simple_object_write structure. */ |
||
| 878 | |||
| 879 | static void |
||
| 880 | simple_object_xcoff_release_write (void *data) |
||
| 881 | { |
||
| 882 | XDELETE (data); |
||
| 883 | } |
||
| 884 | |||
| 885 | /* The XCOFF functions. */ |
||
| 886 | |||
| 887 | const struct simple_object_functions simple_object_xcoff_functions = |
||
| 888 | { |
||
| 889 | simple_object_xcoff_match, |
||
| 890 | simple_object_xcoff_find_sections, |
||
| 891 | simple_object_xcoff_fetch_attributes, |
||
| 892 | simple_object_xcoff_release_read, |
||
| 893 | simple_object_xcoff_attributes_merge, |
||
| 894 | simple_object_xcoff_release_attributes, |
||
| 895 | simple_object_xcoff_start_write, |
||
| 896 | simple_object_xcoff_write_to_file, |
||
| 897 | simple_object_xcoff_release_write |
||
| 898 | }; |