+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0
- * Postprocess pmd object files to export hw support
- *
- * Copyright 2016 Neil Horman <nhorman@tuxdriver.com>
- * Based in part on modpost.c from the linux kernel
- */
-
-#include <stdio.h>
-#include <ctype.h>
-#include <string.h>
-#include <limits.h>
-#include <stdbool.h>
-#include <errno.h>
-#include <libgen.h>
-
-#include <rte_common.h>
-#include "pmdinfogen.h"
-
-#ifdef RTE_ARCH_64
-#define ADDR_SIZE 64
-#else
-#define ADDR_SIZE 32
-#endif
-
-static int use_stdin, use_stdout;
-
-static const char *sym_name(struct elf_info *elf, Elf_Sym *sym)
-{
- if (sym)
- return elf->strtab + sym->st_name;
- else
- return "(unknown)";
-}
-
-static void *grab_file(const char *filename, unsigned long *size)
-{
- struct stat st;
- void *map = MAP_FAILED;
- int fd = -1;
-
- if (!use_stdin) {
- fd = open(filename, O_RDONLY);
- if (fd < 0)
- return NULL;
- } else {
- /* from stdin, use a temporary file to mmap */
- FILE *infile;
- char buffer[1024];
- int n;
-
- infile = tmpfile();
- if (infile == NULL) {
- perror("tmpfile");
- return NULL;
- }
- fd = dup(fileno(infile));
- fclose(infile);
- if (fd < 0)
- return NULL;
-
- n = read(STDIN_FILENO, buffer, sizeof(buffer));
- while (n > 0) {
- if (write(fd, buffer, n) != n)
- goto failed;
- n = read(STDIN_FILENO, buffer, sizeof(buffer));
- }
- }
-
- if (fstat(fd, &st))
- goto failed;
-
- *size = st.st_size;
- map = mmap(NULL, *size, PROT_READ|PROT_WRITE, MAP_PRIVATE, fd, 0);
-
-failed:
- close(fd);
- if (map == MAP_FAILED)
- return NULL;
- return map;
-}
-
-/**
- * Return a copy of the next line in a mmap'ed file.
- * spaces in the beginning of the line is trimmed away.
- * Return a pointer to a static buffer.
- **/
-static void release_file(void *file, unsigned long size)
-{
- munmap(file, size);
-}
-
-
-static void *get_sym_value(struct elf_info *info, const Elf_Sym *sym)
-{
- return RTE_PTR_ADD(info->hdr,
- info->sechdrs[sym->st_shndx].sh_offset + sym->st_value);
-}
-
-static Elf_Sym *find_sym_in_symtab(struct elf_info *info,
- const char *name, Elf_Sym *last)
-{
- Elf_Sym *idx;
- if (last)
- idx = last+1;
- else
- idx = info->symtab_start;
-
- for (; idx < info->symtab_stop; idx++) {
- const char *n = sym_name(info, idx);
- if (!strncmp(n, name, strlen(name)))
- return idx;
- }
- return NULL;
-}
-
-static int parse_elf(struct elf_info *info, const char *filename)
-{
- unsigned int i;
- Elf_Ehdr *hdr;
- Elf_Shdr *sechdrs;
- Elf_Sym *sym;
- int endian;
- unsigned int symtab_idx = ~0U, symtab_shndx_idx = ~0U;
-
- hdr = grab_file(filename, &info->size);
- if (!hdr) {
- perror(filename);
- exit(1);
- }
- info->hdr = hdr;
- if (info->size < sizeof(*hdr)) {
- /* file too small, assume this is an empty .o file */
- return 0;
- }
- /* Is this a valid ELF file? */
- if ((hdr->e_ident[EI_MAG0] != ELFMAG0) ||
- (hdr->e_ident[EI_MAG1] != ELFMAG1) ||
- (hdr->e_ident[EI_MAG2] != ELFMAG2) ||
- (hdr->e_ident[EI_MAG3] != ELFMAG3)) {
- /* Not an ELF file - silently ignore it */
- return 0;
- }
-
- if (!hdr->e_ident[EI_DATA]) {
- /* Unknown endian */
- return 0;
- }
-
- endian = hdr->e_ident[EI_DATA];
-
- /* Fix endianness in ELF header */
- hdr->e_type = TO_NATIVE(endian, 16, hdr->e_type);
- hdr->e_machine = TO_NATIVE(endian, 16, hdr->e_machine);
- hdr->e_version = TO_NATIVE(endian, 32, hdr->e_version);
- hdr->e_entry = TO_NATIVE(endian, ADDR_SIZE, hdr->e_entry);
- hdr->e_phoff = TO_NATIVE(endian, ADDR_SIZE, hdr->e_phoff);
- hdr->e_shoff = TO_NATIVE(endian, ADDR_SIZE, hdr->e_shoff);
- hdr->e_flags = TO_NATIVE(endian, 32, hdr->e_flags);
- hdr->e_ehsize = TO_NATIVE(endian, 16, hdr->e_ehsize);
- hdr->e_phentsize = TO_NATIVE(endian, 16, hdr->e_phentsize);
- hdr->e_phnum = TO_NATIVE(endian, 16, hdr->e_phnum);
- hdr->e_shentsize = TO_NATIVE(endian, 16, hdr->e_shentsize);
- hdr->e_shnum = TO_NATIVE(endian, 16, hdr->e_shnum);
- hdr->e_shstrndx = TO_NATIVE(endian, 16, hdr->e_shstrndx);
-
- sechdrs = RTE_PTR_ADD(hdr, hdr->e_shoff);
- info->sechdrs = sechdrs;
-
- /* Check if file offset is correct */
- if (hdr->e_shoff > info->size) {
- fprintf(stderr, "section header offset=%lu in file '%s' "
- "is bigger than filesize=%lu\n",
- (unsigned long)hdr->e_shoff,
- filename, info->size);
- return 0;
- }
-
- if (hdr->e_shnum == SHN_UNDEF) {
- /*
- * There are more than 64k sections,
- * read count from .sh_size.
- */
- info->num_sections =
- TO_NATIVE(endian, ADDR_SIZE, sechdrs[0].sh_size);
- } else {
- info->num_sections = hdr->e_shnum;
- }
- if (hdr->e_shstrndx == SHN_XINDEX)
- info->secindex_strings =
- TO_NATIVE(endian, 32, sechdrs[0].sh_link);
- else
- info->secindex_strings = hdr->e_shstrndx;
-
- /* Fix endianness in section headers */
- for (i = 0; i < info->num_sections; i++) {
- sechdrs[i].sh_name =
- TO_NATIVE(endian, 32, sechdrs[i].sh_name);
- sechdrs[i].sh_type =
- TO_NATIVE(endian, 32, sechdrs[i].sh_type);
- sechdrs[i].sh_flags =
- TO_NATIVE(endian, 32, sechdrs[i].sh_flags);
- sechdrs[i].sh_addr =
- TO_NATIVE(endian, ADDR_SIZE, sechdrs[i].sh_addr);
- sechdrs[i].sh_offset =
- TO_NATIVE(endian, ADDR_SIZE, sechdrs[i].sh_offset);
- sechdrs[i].sh_size =
- TO_NATIVE(endian, ADDR_SIZE, sechdrs[i].sh_size);
- sechdrs[i].sh_link =
- TO_NATIVE(endian, 32, sechdrs[i].sh_link);
- sechdrs[i].sh_info =
- TO_NATIVE(endian, 32, sechdrs[i].sh_info);
- sechdrs[i].sh_addralign =
- TO_NATIVE(endian, ADDR_SIZE, sechdrs[i].sh_addralign);
- sechdrs[i].sh_entsize =
- TO_NATIVE(endian, ADDR_SIZE, sechdrs[i].sh_entsize);
- }
- /* Find symbol table. */
- for (i = 1; i < info->num_sections; i++) {
- int nobits = sechdrs[i].sh_type == SHT_NOBITS;
-
- if (!nobits && sechdrs[i].sh_offset > info->size) {
- fprintf(stderr, "%s is truncated. "
- "sechdrs[i].sh_offset=%lu > sizeof(*hrd)=%zu\n",
- filename, (unsigned long)sechdrs[i].sh_offset,
- sizeof(*hdr));
- return 0;
- }
-
- if (sechdrs[i].sh_type == SHT_SYMTAB) {
- unsigned int sh_link_idx;
- symtab_idx = i;
- info->symtab_start = RTE_PTR_ADD(hdr,
- sechdrs[i].sh_offset);
- info->symtab_stop = RTE_PTR_ADD(hdr,
- sechdrs[i].sh_offset + sechdrs[i].sh_size);
- sh_link_idx = sechdrs[i].sh_link;
- info->strtab = RTE_PTR_ADD(hdr,
- sechdrs[sh_link_idx].sh_offset);
- }
-
- /* 32bit section no. table? ("more than 64k sections") */
- if (sechdrs[i].sh_type == SHT_SYMTAB_SHNDX) {
- symtab_shndx_idx = i;
- info->symtab_shndx_start = RTE_PTR_ADD(hdr,
- sechdrs[i].sh_offset);
- info->symtab_shndx_stop = RTE_PTR_ADD(hdr,
- sechdrs[i].sh_offset + sechdrs[i].sh_size);
- }
- }
- if (!info->symtab_start)
- fprintf(stderr, "%s has no symtab?\n", filename);
- else {
- /* Fix endianness in symbols */
- for (sym = info->symtab_start; sym < info->symtab_stop; sym++) {
- sym->st_shndx = TO_NATIVE(endian, 16, sym->st_shndx);
- sym->st_name = TO_NATIVE(endian, 32, sym->st_name);
- sym->st_value = TO_NATIVE(endian, ADDR_SIZE, sym->st_value);
- sym->st_size = TO_NATIVE(endian, ADDR_SIZE, sym->st_size);
- }
- }
-
- if (symtab_shndx_idx != ~0U) {
- Elf32_Word *p;
- if (symtab_idx != sechdrs[symtab_shndx_idx].sh_link)
- fprintf(stderr,
- "%s: SYMTAB_SHNDX has bad sh_link: %u!=%u\n",
- filename, sechdrs[symtab_shndx_idx].sh_link,
- symtab_idx);
- /* Fix endianness */
- for (p = info->symtab_shndx_start; p < info->symtab_shndx_stop;
- p++)
- *p = TO_NATIVE(endian, 32, *p);
- }
-
- return 1;
-}
-
-static void parse_elf_finish(struct elf_info *info)
-{
- struct pmd_driver *tmp, *idx = info->drivers;
- release_file(info->hdr, info->size);
- while (idx) {
- tmp = idx->next;
- free(idx);
- idx = tmp;
- }
-}
-
-struct opt_tag {
- const char *suffix;
- const char *json_id;
-};
-
-static const struct opt_tag opt_tags[] = {
- {"_param_string_export", "params"},
- {"_kmod_dep_export", "kmod"},
-};
-
-static int complete_pmd_entry(struct elf_info *info, struct pmd_driver *drv)
-{
- const char *tname;
- int i;
- char tmpsymname[128];
- Elf_Sym *tmpsym;
-
- drv->name = get_sym_value(info, drv->name_sym);
-
- for (i = 0; i < PMD_OPT_MAX; i++) {
- memset(tmpsymname, 0, 128);
- sprintf(tmpsymname, "__%s%s", drv->name, opt_tags[i].suffix);
- tmpsym = find_sym_in_symtab(info, tmpsymname, NULL);
- if (!tmpsym)
- continue;
- drv->opt_vals[i] = get_sym_value(info, tmpsym);
- }
-
- memset(tmpsymname, 0, 128);
- sprintf(tmpsymname, "__%s_pci_tbl_export", drv->name);
-
- tmpsym = find_sym_in_symtab(info, tmpsymname, NULL);
-
-
- /*
- * If this returns NULL, then this is a PMD_VDEV, because
- * it has no pci table reference
- */
- if (!tmpsym) {
- drv->pci_tbl = NULL;
- return 0;
- }
-
- tname = get_sym_value(info, tmpsym);
- tmpsym = find_sym_in_symtab(info, tname, NULL);
- if (!tmpsym)
- return -ENOENT;
-
- drv->pci_tbl = (struct rte_pci_id *)get_sym_value(info, tmpsym);
- if (!drv->pci_tbl)
- return -ENOENT;
-
- return 0;
-}
-
-static int locate_pmd_entries(struct elf_info *info)
-{
- Elf_Sym *last = NULL;
- struct pmd_driver *new;
-
- info->drivers = NULL;
-
- do {
- new = calloc(sizeof(struct pmd_driver), 1);
- if (new == NULL) {
- fprintf(stderr, "Failed to calloc memory\n");
- return -1;
- }
- new->name_sym = find_sym_in_symtab(info, "this_pmd_name", last);
- last = new->name_sym;
- if (!new->name_sym)
- free(new);
- else {
- if (complete_pmd_entry(info, new)) {
- fprintf(stderr,
- "Failed to complete pmd entry\n");
- free(new);
- } else {
- new->next = info->drivers;
- info->drivers = new;
- }
- }
- } while (last);
-
- return 0;
-}
-
-static void output_pmd_info_string(struct elf_info *info, char *outfile)
-{
- FILE *ofd;
- struct pmd_driver *drv;
- struct rte_pci_id *pci_ids;
- int idx = 0;
-
- if (use_stdout)
- ofd = stdout;
- else {
- ofd = fopen(outfile, "w+");
- if (!ofd) {
- fprintf(stderr, "Unable to open output file\n");
- return;
- }
- }
-
- drv = info->drivers;
-
- while (drv) {
- fprintf(ofd, "const char %s_pmd_info[] __attribute__((used)) = "
- "\"PMD_INFO_STRING= {",
- drv->name);
- fprintf(ofd, "\\\"name\\\" : \\\"%s\\\", ", drv->name);
-
- for (idx = 0; idx < PMD_OPT_MAX; idx++) {
- if (drv->opt_vals[idx])
- fprintf(ofd, "\\\"%s\\\" : \\\"%s\\\", ",
- opt_tags[idx].json_id,
- drv->opt_vals[idx]);
- }
-
- pci_ids = drv->pci_tbl;
- fprintf(ofd, "\\\"pci_ids\\\" : [");
-
- while (pci_ids && pci_ids->device_id) {
- fprintf(ofd, "[%d, %d, %d, %d]",
- pci_ids->vendor_id, pci_ids->device_id,
- pci_ids->subsystem_vendor_id,
- pci_ids->subsystem_device_id);
- pci_ids++;
- if (pci_ids->device_id)
- fprintf(ofd, ",");
- else
- fprintf(ofd, " ");
- }
- fprintf(ofd, "]}\";\n");
- drv = drv->next;
- }
-
- fclose(ofd);
-}
-
-int main(int argc, char **argv)
-{
- struct elf_info info = {0};
- int rc = 1;
-
- if (argc < 3) {
- fprintf(stderr,
- "usage: %s <object file> <c output file>\n",
- basename(argv[0]));
- exit(127);
- }
- use_stdin = !strcmp(argv[1], "-");
- use_stdout = !strcmp(argv[2], "-");
- parse_elf(&info, argv[1]);
-
- if (locate_pmd_entries(&info) < 0)
- exit(1);
-
- if (info.drivers) {
- output_pmd_info_string(&info, argv[2]);
- rc = 0;
- } else {
- fprintf(stderr, "No drivers registered\n");
- }
-
- parse_elf_finish(&info);
- exit(rc);
-}
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0
- * Postprocess pmd object files to export hw support
- *
- * Copyright 2016 Neil Horman <nhorman@tuxdriver.com>
- * Based in part on modpost.c from the linux kernel
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <stdarg.h>
-#include <string.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/mman.h>
-#ifdef __linux__
-#include <endian.h>
-#else
-#include <sys/endian.h>
-#endif
-#include <fcntl.h>
-#include <unistd.h>
-#include <elf.h>
-#include <rte_pci.h>
-
-/* On BSD-alike OSes elf.h defines these according to host's word size */
-#undef ELF_ST_BIND
-#undef ELF_ST_TYPE
-#undef ELF_R_SYM
-#undef ELF_R_TYPE
-
-/*
- * Define ELF64_* to ELF_*, the latter being defined in both 32 and 64 bit
- * flavors in elf.h. This makes our code a bit more generic between arches
- * and allows us to support 32 bit code in the future should we ever want to
- */
-#ifdef RTE_ARCH_64
-#define Elf_Ehdr Elf64_Ehdr
-#define Elf_Shdr Elf64_Shdr
-#define Elf_Sym Elf64_Sym
-#define Elf_Addr Elf64_Addr
-#define Elf_Sword Elf64_Sxword
-#define Elf_Section Elf64_Half
-#define ELF_ST_BIND ELF64_ST_BIND
-#define ELF_ST_TYPE ELF64_ST_TYPE
-
-#define Elf_Rel Elf64_Rel
-#define Elf_Rela Elf64_Rela
-#define ELF_R_SYM ELF64_R_SYM
-#define ELF_R_TYPE ELF64_R_TYPE
-#else
-#define Elf_Ehdr Elf32_Ehdr
-#define Elf_Shdr Elf32_Shdr
-#define Elf_Sym Elf32_Sym
-#define Elf_Addr Elf32_Addr
-#define Elf_Sword Elf32_Sxword
-#define Elf_Section Elf32_Half
-#define ELF_ST_BIND ELF32_ST_BIND
-#define ELF_ST_TYPE ELF32_ST_TYPE
-
-#define Elf_Rel Elf32_Rel
-#define Elf_Rela Elf32_Rela
-#define ELF_R_SYM ELF32_R_SYM
-#define ELF_R_TYPE ELF32_R_TYPE
-#endif
-
-
-/*
- * Note, it seems odd that we have both a CONVERT_NATIVE and a TO_NATIVE macro
- * below. We do this because the values passed to TO_NATIVE may themselves be
- * macros and need both macros here to get expanded. Specifically its the width
- * variable we are concerned with, because it needs to get expanded prior to
- * string concatenation
- */
-#define CONVERT_NATIVE(fend, width, x) ({ \
-typeof(x) ___x; \
-if ((fend) == ELFDATA2LSB) \
- ___x = le##width##toh(x); \
-else \
- ___x = be##width##toh(x); \
-___x; \
-})
-
-#define TO_NATIVE(fend, width, x) CONVERT_NATIVE(fend, width, x)
-
-enum opt_params {
- PMD_PARAM_STRING = 0,
- PMD_KMOD_DEP,
- PMD_OPT_MAX
-};
-
-struct pmd_driver {
- Elf_Sym *name_sym;
- const char *name;
- struct rte_pci_id *pci_tbl;
- struct pmd_driver *next;
-
- const char *opt_vals[PMD_OPT_MAX];
-};
-
-struct elf_info {
- unsigned long size;
- Elf_Ehdr *hdr;
- Elf_Shdr *sechdrs;
- Elf_Sym *symtab_start;
- Elf_Sym *symtab_stop;
- char *strtab;
-
- /* support for 32bit section numbers */
-
- unsigned int num_sections; /* max_secindex + 1 */
- unsigned int secindex_strings;
- /* if Nth symbol table entry has .st_shndx = SHN_XINDEX,
- * take shndx from symtab_shndx_start[N] instead
- */
- Elf32_Word *symtab_shndx_start;
- Elf32_Word *symtab_shndx_stop;
-
- struct pmd_driver *drivers;
-};
git.droids-corp.org / dpdk.git / commitdiff