diff options
Diffstat (limited to 'elfcopy/sections.c')
| -rw-r--r-- | elfcopy/sections.c | 29 |
1 files changed, 26 insertions, 3 deletions
diff --git a/elfcopy/sections.c b/elfcopy/sections.c index c503666c8948..6c733f8a0f81 100644 --- a/elfcopy/sections.c +++ b/elfcopy/sections.c @@ -1,5 +1,5 @@ /*- - * Copyright (c) 2007-2011 Kai Wang + * Copyright (c) 2007-2011,2014 Kai Wang * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -35,7 +35,7 @@ #include "elfcopy.h" -ELFTC_VCSID("$Id: sections.c 3126 2014-12-21 08:03:31Z kaiwang27 $"); +ELFTC_VCSID("$Id: sections.c 3134 2014-12-23 10:43:59Z kaiwang27 $"); static void add_gnu_debuglink(struct elfcopy *ecp); static uint32_t calc_crc32(const char *p, size_t len, uint32_t crc); @@ -485,7 +485,10 @@ insert_shtab(struct elfcopy *ecp, int tail) if ((shtab = calloc(1, sizeof(*shtab))) == NULL) errx(EXIT_FAILURE, "calloc failed"); if (!tail) { - /* shoff of input object is used as a hint. */ + /* + * "shoff" of input object is used as a hint for section + * resync later. + */ if (gelf_getehdr(ecp->ein, &ieh) == NULL) errx(EXIT_FAILURE, "gelf_getehdr() failed: %s", elf_errmsg(-1)); @@ -764,6 +767,15 @@ resync_sections(struct elfcopy *ecp) first = 0; } + /* + * Ignore TLS sections with load address 0 and without + * content. We don't need to adjust their file offset or + * VMA, only the size matters. + */ + if (s->seg_tls != NULL && s->type == SHT_NOBITS && + s->off == 0) + continue; + /* Align section offset. */ if (off <= s->off) { if (!s->loadable) @@ -1050,6 +1062,17 @@ copy_data(struct section *s) od->d_size = id->d_size; od->d_version = id->d_version; } + + /* + * Alignment Fixup. libelf does not allow the alignment for + * Elf_Data descriptor to be set to 0. In this case we workaround + * it by setting the alignment to 1. + * + * According to the ELF ABI, alignment 0 and 1 has the same + * meaning: the section has no alignment constraints. + */ + if (od->d_align == 0) + od->d_align = 1; } struct section * |