[nasm:master] output: elf64 -- increase .symtab and .rel* alignment to 8

[nasm-bot f. Ed M. <em...@fr...>]

Commit-ID:  1f0cb0f2c1ba632c0fab02424928cfb756a9160c
Gitweb:     http://repo.or.cz/w/nasm.git?a=commitdiff;h=1f0cb0f2c1ba632c0fab02424928cfb756a9160c
Author:     Ed Maste <em...@fr...>
AuthorDate: Thu, 16 Apr 2015 00:59:52 +0300
Committer:  Cyrill Gorcunov <gor...@gm...>
CommitDate: Thu, 16 Apr 2015 01:02:55 +0300

output: elf64 -- increase .symtab and .rel* alignment to 8

Discovered while working on ELF Tool Chain elfcopy (strip),
which originally crashed on an assert while processing
a nasm-generated ELF object.

The .symtab and .rela.text sections report 4 byte alignment,
but require 8.

As an aside, see https://sourceforge.net/p/elftoolchain/tickets/485/ for a
discussion of the ELF Tool Chain issue that this bug exposed.

With my WIP elfcopy change and nasm-assembled jccolss2-64.o from libjpeg-turbo:

% strip -o /dev/null --strip-debug jccolss2-64.o
strip: section .symtab alignment 4 increased to 8
strip: section .rela.text alignment 4 increased to 8

http://bugzilla.nasm.us/show_bug.cgi?id=3392307

Signed-off-by: Ed Maste <em...@fr...>
Signed-off-by: Cyrill Gorcunov <gor...@gm...>


---
 output/outelf64.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/output/outelf64.c b/output/outelf64.c
index 241e345..19bd845 100644
--- a/output/outelf64.c
+++ b/output/outelf64.c
@@ -1084,7 +1084,7 @@ static void elf_write(void)
 
     /* .symtab */
     elf_section_header(p - shstrtab, SHT_SYMTAB, 0, symtab, true,
-                       symtablen, sec_strtab, symtablocal, 4, 24);
+                       symtablen, sec_strtab, symtablocal, 8, 24);
     p += strlen(p) + 1;
 
     /* .strtab */
@@ -1096,7 +1096,7 @@ static void elf_write(void)
     for (i = 0; i < nsects; i++)
         if (sects[i]->head) {
             elf_section_header(p - shstrtab, SHT_RELA, 0, sects[i]->rel, true,
-                               sects[i]->rellen, sec_symtab, i + 1, 4, 24);
+                               sects[i]->rellen, sec_symtab, i + 1, 8, 24);
             p += strlen(p) + 1;
         }