Allocate the first .plt entry space only if needed
authorH.J. Lu <hjl.tools@gmail.com>
Tue, 12 May 2015 20:11:48 +0000 (13:11 -0700)
committerH.J. Lu <hjl.tools@gmail.com>
Tue, 12 May 2015 20:11:48 +0000 (13:11 -0700)
commita3747075ae478f27bf3e0643021a85fb6cdad0e3
tree1ffd8565b79a36156fc3e391d79d9ecc6a7d4c63
parent98624574ea8834b2084eb1f0ca7341feecc7329f
Allocate the first .plt entry space only if needed

Commit dd7e64d45b317128f5fe813a8da0b13b4ad046ae may optimize out
i386/x86-64 JUMP_SLOT relocation.  If there is no JUMP_SLOT relocation
left, we don't need to the first .plt entry.  This patch allocates
space for the first .plt entry only if we also reserve space for a PLT
slot for JUMP_SLOT relocation.

bfd/

* elf32-i386.c (elf_i386_allocate_dynrelocs): Allocate space
for the first .plt entry only if needed.
* elf64-x86-64.c (elf_x86_64_allocate_dynrelocs): Likewise.

ld/testsuite/

* ld-i386/i386.exp: Run pltgot-1 for Linux targets.
* ld-x86-64/x86-64.exp: Likewise.
* ld-i386/pltgot-1.d: New file.
* ld-i386/pltgot-1.s: Likewise.
* ld-x86-64/pltgot-1.d: Likewise.
* ld-x86-64/pltgot-1.s: Likewise.
bfd/ChangeLog
bfd/elf32-i386.c
bfd/elf64-x86-64.c
ld/testsuite/ChangeLog
ld/testsuite/ld-i386/i386.exp
ld/testsuite/ld-i386/pltgot-1.d [new file with mode: 0644]
ld/testsuite/ld-i386/pltgot-1.s [new file with mode: 0644]
ld/testsuite/ld-x86-64/pltgot-1.d [new file with mode: 0644]
ld/testsuite/ld-x86-64/pltgot-1.s [new file with mode: 0644]
ld/testsuite/ld-x86-64/x86-64.exp