projects / ceph.git / blame
| Commit | Line | Data |
|---|---|---|
| 7c673cae FG |
1 | |
| 2 | /* Postprocess pmd object files to export hw support | |
| 3 | * | |
| 4 | * Copyright 2016 Neil Horman <nhorman@tuxdriver.com> | |
| 5 | * Based in part on modpost.c from the linux kernel | |
| 6 | * | |
| 7 | * This software may be used and distributed according to the terms | |
| 8 | * of the GNU General Public License V2, incorporated herein by reference. | |
| 9 | * | |
| 10 | */ | |
| 11 | ||
| 12 | #include <stdio.h> | |
| 13 | #include <stdlib.h> | |
| 14 | #include <stdarg.h> | |
| 15 | #include <string.h> | |
| 16 | #include <sys/types.h> | |
| 17 | #include <sys/stat.h> | |
| 18 | #include <sys/mman.h> | |
| 11fdf7f2 TL |
19 | #ifdef __linux__ |
| 20 | #include <endian.h> | |
| 21 | #else | |
| 22 | #include <sys/endian.h> | |
| 23 | #endif | |
| 7c673cae FG |
24 | #include <fcntl.h> |
| 25 | #include <unistd.h> | |
| 26 | #include <elf.h> | |
| 27 | #include <rte_config.h> | |
| 28 | #include <rte_pci.h> | |
| 7c673cae FG |
29 | |
| 30 | /* On BSD-alike OSes elf.h defines these according to host's word size */ | |
| 31 | #undef ELF_ST_BIND | |
| 32 | #undef ELF_ST_TYPE | |
| 33 | #undef ELF_R_SYM | |
| 34 | #undef ELF_R_TYPE | |
| 35 | ||
| 36 | /* | |
| 37 | * Define ELF64_* to ELF_*, the latter being defined in both 32 and 64 bit | |
| 38 | * flavors in elf.h. This makes our code a bit more generic between arches | |
| 39 | * and allows us to support 32 bit code in the future should we ever want to | |
| 40 | */ | |
| 41 | #ifdef RTE_ARCH_64 | |
| 42 | #define Elf_Ehdr Elf64_Ehdr | |
| 43 | #define Elf_Shdr Elf64_Shdr | |
| 44 | #define Elf_Sym Elf64_Sym | |
| 45 | #define Elf_Addr Elf64_Addr | |
| 46 | #define Elf_Sword Elf64_Sxword | |
| 47 | #define Elf_Section Elf64_Half | |
| 48 | #define ELF_ST_BIND ELF64_ST_BIND | |
| 49 | #define ELF_ST_TYPE ELF64_ST_TYPE | |
| 50 | ||
| 51 | #define Elf_Rel Elf64_Rel | |
| 52 | #define Elf_Rela Elf64_Rela | |
| 53 | #define ELF_R_SYM ELF64_R_SYM | |
| 54 | #define ELF_R_TYPE ELF64_R_TYPE | |
| 55 | #else | |
| 56 | #define Elf_Ehdr Elf32_Ehdr | |
| 57 | #define Elf_Shdr Elf32_Shdr | |
| 58 | #define Elf_Sym Elf32_Sym | |
| 59 | #define Elf_Addr Elf32_Addr | |
| 60 | #define Elf_Sword Elf32_Sxword | |
| 61 | #define Elf_Section Elf32_Half | |
| 62 | #define ELF_ST_BIND ELF32_ST_BIND | |
| 63 | #define ELF_ST_TYPE ELF32_ST_TYPE | |
| 64 | ||
| 65 | #define Elf_Rel Elf32_Rel | |
| 66 | #define Elf_Rela Elf32_Rela | |
| 67 | #define ELF_R_SYM ELF32_R_SYM | |
| 68 | #define ELF_R_TYPE ELF32_R_TYPE | |
| 69 | #endif | |
| 70 | ||
| 71 | ||
| 72 | /* | |
| 73 | * Note, it seems odd that we have both a CONVERT_NATIVE and a TO_NATIVE macro | |
| 74 | * below. We do this because the values passed to TO_NATIVE may themselves be | |
| 75 | * macros and need both macros here to get expanded. Specifically its the width | |
| 76 | * variable we are concerned with, because it needs to get expanded prior to | |
| 77 | * string concatenation | |
| 78 | */ | |
| 79 | #define CONVERT_NATIVE(fend, width, x) ({ \ | |
| 80 | typeof(x) ___x; \ | |
| 81 | if ((fend) == ELFDATA2LSB) \ | |
| 11fdf7f2 | 82 | ___x = le##width##toh(x); \ |
| 7c673cae | 83 | else \ |
| 11fdf7f2 | 84 | ___x = be##width##toh(x); \ |
| 20effc67 | 85 | ___x; \ |
| 7c673cae FG |
86 | }) |
| 87 | ||
| 88 | #define TO_NATIVE(fend, width, x) CONVERT_NATIVE(fend, width, x) | |
| 89 | ||
| 90 | enum opt_params { | |
| 91 | PMD_PARAM_STRING = 0, | |
| 11fdf7f2 | 92 | PMD_KMOD_DEP, |
| 7c673cae FG |
93 | PMD_OPT_MAX |
| 94 | }; | |
| 95 | ||
| 96 | struct pmd_driver { | |
| 97 | Elf_Sym *name_sym; | |
| 98 | const char *name; | |
| 99 | struct rte_pci_id *pci_tbl; | |
| 100 | struct pmd_driver *next; | |
| 101 | ||
| 102 | const char *opt_vals[PMD_OPT_MAX]; | |
| 103 | }; | |
| 104 | ||
| 105 | struct elf_info { | |
| 106 | unsigned long size; | |
| 107 | Elf_Ehdr *hdr; | |
| 108 | Elf_Shdr *sechdrs; | |
| 109 | Elf_Sym *symtab_start; | |
| 110 | Elf_Sym *symtab_stop; | |
| 111 | char *strtab; | |
| 112 | ||
| 113 | /* support for 32bit section numbers */ | |
| 114 | ||
| 115 | unsigned int num_sections; /* max_secindex + 1 */ | |
| 116 | unsigned int secindex_strings; | |
| 117 | /* if Nth symbol table entry has .st_shndx = SHN_XINDEX, | |
| 118 | * take shndx from symtab_shndx_start[N] instead | |
| 119 | */ | |
| 120 | Elf32_Word *symtab_shndx_start; | |
| 121 | Elf32_Word *symtab_shndx_stop; | |
| 122 | ||
| 123 | struct pmd_driver *drivers; | |
| 124 | }; | |
| 125 |