ceph/src/dpdk/buildtools/pmdinfogen/pmdinfogen.h

   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>
  19 #include <fcntl.h>
  20 #include <unistd.h>
  21 #include <elf.h>
  22 #include <rte_config.h>
  23 #include <rte_pci.h>
  24 #include <rte_byteorder.h>
  25
  26 /* On BSD-alike OSes elf.h defines these according to host's word size */
  27 #undef ELF_ST_BIND
  28 #undef ELF_ST_TYPE
  29 #undef ELF_R_SYM
  30 #undef ELF_R_TYPE
  31
  32 /*
  33  * Define ELF64_* to ELF_*, the latter being defined in both 32 and 64 bit
  34  * flavors in elf.h.  This makes our code a bit more generic between arches
  35  * and allows us to support 32 bit code in the future should we ever want to
  36  */
  37 #ifdef RTE_ARCH_64
  38 #define Elf_Ehdr    Elf64_Ehdr
  39 #define Elf_Shdr    Elf64_Shdr
  40 #define Elf_Sym     Elf64_Sym
  41 #define Elf_Addr    Elf64_Addr
  42 #define Elf_Sword   Elf64_Sxword
  43 #define Elf_Section Elf64_Half
  44 #define ELF_ST_BIND ELF64_ST_BIND
  45 #define ELF_ST_TYPE ELF64_ST_TYPE
  46
  47 #define Elf_Rel     Elf64_Rel
  48 #define Elf_Rela    Elf64_Rela
  49 #define ELF_R_SYM   ELF64_R_SYM
  50 #define ELF_R_TYPE  ELF64_R_TYPE
  51 #else
  52 #define Elf_Ehdr    Elf32_Ehdr
  53 #define Elf_Shdr    Elf32_Shdr
  54 #define Elf_Sym     Elf32_Sym
  55 #define Elf_Addr    Elf32_Addr
  56 #define Elf_Sword   Elf32_Sxword
  57 #define Elf_Section Elf32_Half
  58 #define ELF_ST_BIND ELF32_ST_BIND
  59 #define ELF_ST_TYPE ELF32_ST_TYPE
  60
  61 #define Elf_Rel     Elf32_Rel
  62 #define Elf_Rela    Elf32_Rela
  63 #define ELF_R_SYM   ELF32_R_SYM
  64 #define ELF_R_TYPE  ELF32_R_TYPE
  65 #endif
  66
  67
  68 /*
  69  * Note, it seems odd that we have both a CONVERT_NATIVE and a TO_NATIVE macro
  70  * below.  We do this because the values passed to TO_NATIVE may themselves be
  71  * macros and need both macros here to get expanded.  Specifically its the width
  72  * variable we are concerned with, because it needs to get expanded prior to
  73  * string concatenation
  74  */
  75 #define CONVERT_NATIVE(fend, width, x) ({ \
  76 typeof(x) ___x; \
  77 if ((fend) == ELFDATA2LSB) \
  78         ___x = rte_le_to_cpu_##width(x); \
  79 else \
  80         ___x = rte_be_to_cpu_##width(x); \
  81         ___x; \
  82 })
  83
  84 #define TO_NATIVE(fend, width, x) CONVERT_NATIVE(fend, width, x)
  85
  86 enum opt_params {
  87         PMD_PARAM_STRING = 0,
  88         PMD_OPT_MAX
  89 };
  90
  91 struct pmd_driver {
  92         Elf_Sym *name_sym;
  93         const char *name;
  94         struct rte_pci_id *pci_tbl;
  95         struct pmd_driver *next;
  96
  97         const char *opt_vals[PMD_OPT_MAX];
  98 };
  99
 100 struct elf_info {
 101         unsigned long size;
 102         Elf_Ehdr     *hdr;
 103         Elf_Shdr     *sechdrs;
 104         Elf_Sym      *symtab_start;
 105         Elf_Sym      *symtab_stop;
 106         char         *strtab;
 107
 108         /* support for 32bit section numbers */
 109
 110         unsigned int num_sections; /* max_secindex + 1 */
 111         unsigned int secindex_strings;
 112         /* if Nth symbol table entry has .st_shndx = SHN_XINDEX,
 113          * take shndx from symtab_shndx_start[N] instead
 114          */
 115         Elf32_Word   *symtab_shndx_start;
 116         Elf32_Word   *symtab_shndx_stop;
 117
 118         struct pmd_driver *drivers;
 119 };
 120