pmdinfogen: add buildtools and pmdinfogen utility

[dpdk.git] / buildtools / pmdinfogen / pmdinfogen.h

diff --git a/buildtools/pmdinfogen/pmdinfogen.h b/buildtools/pmdinfogen/pmdinfogen.h
new file mode 100644 (file)
index 0000000..1da2966
--- /dev/null
+++ b/buildtools/pmdinfogen/pmdinfogen.h
@@ -0,0 +1,120 @@
+
+/* 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
+ *
+ * This software may be used and distributed according to the terms
+ * of the GNU General Public License V2, incorporated herein by reference.
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <elf.h>
+#include <rte_config.h>
+#include <rte_pci.h>
+#include <rte_byteorder.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 = rte_le_to_cpu_##width(x); \
+else \
+       ___x = rte_be_to_cpu_##width(x); \
+       ___x; \
+})
+
+#define TO_NATIVE(fend, width, x) CONVERT_NATIVE(fend, width, x)
+
+enum opt_params {
+       PMD_PARAM_STRING = 0,
+       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;
+};
+