diff options
Diffstat (limited to 'trunk/m4/libelf.m4')
| -rw-r--r-- | trunk/m4/libelf.m4 | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/trunk/m4/libelf.m4 b/trunk/m4/libelf.m4 new file mode 100644 index 0000000..7e80a5d --- /dev/null +++ b/trunk/m4/libelf.m4 @@ -0,0 +1,118 @@ +#serial 7 + +dnl Some libelf versions have bugs in Elf64_Sxword conversions. +dnl Detect it. + +dnl Written by Jakub Jelinek <jakub@redhat.com>. + +AC_DEFUN(AC_LIBELF_SXWORD, + [AC_TRY_RUN([ +#include <errno.h> +#include <fcntl.h> +#include <elf.h> +#include <libelf.h> +#include <stdlib.h> +#include <stdio.h> +#include <string.h> + +static unsigned char sparc64_elf[] = { +0x7f,0x45,0x4c,0x46,0x02,0x02,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, +0x00,0x01,0x00,0x2b,0x00,0x00,0x00,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, +0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x78, +0x00,0x00,0x00,0x02,0x00,0x40,0x00,0x00,0x00,0x00,0x00,0x40,0x00,0x08,0x00,0x05, +0x00,0x00,0x07,0xff,0xf0,0x00,0x00,0x00,0x00,0x2e,0x73,0x79,0x6d,0x74,0x61,0x62, +0x00,0x2e,0x73,0x74,0x72,0x74,0x61,0x62,0x00,0x2e,0x73,0x68,0x73,0x74,0x72,0x74, +0x61,0x62,0x00,0x2e,0x74,0x65,0x78,0x74,0x00,0x2e,0x64,0x61,0x74,0x61,0x00,0x2e, +0x62,0x73,0x73,0x00,0x66,0x6f,0x6f,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, +0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, +0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, +0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, +0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x1b,0x00,0x00,0x00,0x01, +0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x06,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, +0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x40,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, +0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01, +0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x21,0x00,0x00,0x00,0x01, +0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x03,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, +0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x40,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, +0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01, +0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x27,0x00,0x00,0x00,0x08, +0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x03,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, +0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x40,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, +0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01, +0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x2c,0x00,0x00,0x00,0x01, +0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x02,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, +0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x40,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x08, +0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01, +0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x11,0x00,0x00,0x00,0x03, +0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, +0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x48,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x30, +0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01, +0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x00,0x00,0x00,0x02, +0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, +0x00,0x00,0x00,0x00,0x00,0x00,0x02,0x78,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x78, +0x00,0x00,0x00,0x07,0x00,0x00,0x00,0x05,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x08, +0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x18,0x00,0x00,0x00,0x09,0x00,0x00,0x00,0x03, +0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, +0x00,0x00,0x00,0x00,0x00,0x00,0x02,0xf0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01, +0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01, +0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, +0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, +0x00,0x00,0x00,0x00,0x03,0x00,0x00,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, +0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x03,0x00,0x00,0x02, +0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, +0x00,0x00,0x00,0x00,0x03,0x00,0x00,0x03,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, +0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x03,0x00,0x00,0x04, +0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, +0x00 }; + +int main (void) +{ + Elf *elf; + int fd; + Elf64_Ehdr *ehdr; + Elf64_Addr val; + Elf_Scn *scn; + + fd = open ("conflibelftest", O_RDWR | O_CREAT | O_EXCL); if (fd == -1) exit (1); + unlink ("conflibelftest"); + if (write (fd, sparc64_elf, sizeof(sparc64_elf)) != sizeof(sparc64_elf)) + exit (1); + if (lseek (fd, 0, SEEK_SET) != 0) exit (1); + elf_version (EV_CURRENT); + elf = elf_begin (fd, ELF_C_RDWR, NULL); if (elf == NULL) exit (2); + if ((ehdr = elf64_getehdr (elf)) == NULL) exit (3); + scn = NULL; + while ((scn = elf_nextscn (elf, scn)) != NULL) + { + char *name = NULL; + Elf64_Shdr *shdr; + Elf_Data *src, *dst; + + if ((shdr = elf64_getshdr (scn)) + && (name = elf_strptr (elf, ehdr->e_shstrndx, shdr->sh_name)) + && !strcmp (name, "foo")) + { + src = elf_rawdata (scn, NULL); + if (shdr->sh_size != 8 || src->d_off || src->d_size != 8) exit (4); + if (src == NULL || elf_rawdata (scn, src) != NULL) exit (5); + if ((dst = elf_newdata (scn)) == NULL) exit (6); + dst->d_buf = &val; + dst->d_size = 8; + dst->d_off = 0; + dst->d_type = ELF_T_SXWORD; + src->d_type = ELF_T_SXWORD; + if (elf64_xlatetom (dst, src, ELFDATA2MSB) == NULL) exit (7); + if (val != 0x7fff0000000) + exit (42); + elf_end (elf); + exit (0); + } + } + exit (8); +} + ],,[AC_MSG_ERROR([libelf does not properly convert Elf64_Sxword quantities. +If you are using libelf-0.7.0, please use patches/libelf-0.7.0.patch.])], +[AC_MSG_WARN([Could not test whether libelf properly converts Elf64_Sxword quantities. +If you are using libelf-0.7.0 and your libelf is buggy, please use +patches/libelf-0.7.0.patch.])]) + ]) |