git.efficios.com Git - deliverable/binutils-gdb.git/commit

Add "-z call-nop=PADDING" option to ld

The ld linker can transform indirect call to a locally defined function,
foo, via its GOT slot, to either "NOP call foo" or "call foo NOP" where
NOP is a 1-byte NOP padding. This patch adds a "-z call-nop=PADDING"
option to x86 ld to control 1-byte NOP padding for x86 call instruction.
PADDING is one of prefix-addr, prefix-nop, suffix-nop, prefix-NUMBER or
suffix-NUMBER.

bfd/

* elf32-i386.c (elf_i386_convert_load): Use call_nop_byte and
check call_nop_as_suffix for 1-byte NOP padding to pad call.
* elf64-x86-64.c (elf_x86_64_convert_load): Likewise.

include/

* bfdlink.h (bfd_link_info): Add call_nop_as_suffix and
call_nop_byte.

ld/

* ld/ld.texinfo: Document "-z call-nop=PADDING" option.
* emulparams/call_nop.sh: New file.
* emulparams/elf_i386_be.sh: Source
${srcdir}/emulparams/call_nop.sh.
* emulparams/elf_i386_chaos.sh: Likewise.
* emulparams/elf_i386_ldso.sh: Likewise.
* emulparams/elf_i386_vxworks.sh: Likewise.
* emulparams/elf_iamcu.sh: Likewise.
* emulparams/elf_k1om.sh: Likewise.
* emulparams/elf_l1om.sh: Likewise.
* emulparams/elf_x86_64.sh: Likewise.
* emultempl/elf32.em (gld${EMULATION_NAME}_before_parse): Set
link_info.call_nop_byte if $CALL_NOP_BYTE isn't empty.

ld/testsuite/

* ld-i386/call3.s: New file.
* ld-i386/call3a.d: Likewise.
* ld-i386/call3b.d: Likewise.
* ld-i386/call3c.d: Likewise.
* ld-i386/call3d.d: Likewise.
* ld-i386/call3e.d: Likewise.
* ld-i386/call3f.d: Likewise.
* ld-i386/call3g.d: Likewise.
* ld-i386/call3h.d: Likewise.
* ld-i386/load1-nacl.d: Likewise.
* ld-x86-64/call1.s: Likewise.
* ld-x86-64/call1a.d: Likewise.
* ld-x86-64/call1b.d: Likewise.
* ld-x86-64/call1c.d: Likewise.
* ld-x86-64/call1d.d: Likewise.
* ld-x86-64/call1e.d: Likewise.
* ld-x86-64/call1f.d: Likewise.
* ld-x86-64/call1g.d: Likewise.
* ld-x86-64/call1h.d: Likewise.
* ld-x86-64/call1i.d: Likewise.
* ld-x86-64/load1a-nacl.d: Likewise.
* ld-x86-64/load1b-nacl.d: Likewise.
* ld-x86-64/load1c-nacl.d: Likewise.
* ld-x86-64/load1d-nacl.d: Likewise.

author	H.J. Lu <hjl.tools@gmail.com>
	Thu, 22 Oct 2015 11:53:04 +0000 (04:53 -0700)
committer	H.J. Lu <hjl.tools@gmail.com>
	Thu, 22 Oct 2015 11:56:39 +0000 (04:56 -0700)
commit	caa65211bbbfd53c40c9ce1b79b97ccf2c679a52
tree	fb1a002a3550e25bdfa5c224a52d4a5fd7fab63b	tree \| snapshot
parent	56ceb5b5405af23eddd12e12d8ba849010120324	commit \| diff

bfd/ChangeLog		diff \| blob \| blame \| history
bfd/elf32-i386.c		diff \| blob \| blame \| history
bfd/elf64-x86-64.c		diff \| blob \| blame \| history
include/ChangeLog		diff \| blob \| blame \| history
include/bfdlink.h		diff \| blob \| blame \| history
ld/ChangeLog		diff \| blob \| blame \| history
ld/emulparams/call_nop.sh	[new file with mode: 0644]	blob
ld/emulparams/elf32_x86_64.sh		diff \| blob \| blame \| history
ld/emulparams/elf_i386.sh		diff \| blob \| blame \| history
ld/emulparams/elf_i386_be.sh		diff \| blob \| blame \| history
ld/emulparams/elf_i386_chaos.sh		diff \| blob \| blame \| history
ld/emulparams/elf_i386_ldso.sh		diff \| blob \| blame \| history
ld/emulparams/elf_i386_vxworks.sh		diff \| blob \| blame \| history
ld/emulparams/elf_iamcu.sh		diff \| blob \| blame \| history
ld/emulparams/elf_k1om.sh		diff \| blob \| blame \| history
ld/emulparams/elf_l1om.sh		diff \| blob \| blame \| history
ld/emulparams/elf_x86_64.sh		diff \| blob \| blame \| history
ld/emultempl/elf32.em		diff \| blob \| blame \| history
ld/ld.texinfo		diff \| blob \| blame \| history
ld/testsuite/ChangeLog		diff \| blob \| blame \| history
ld/testsuite/ld-i386/call3.s	[new file with mode: 0644]	blob
ld/testsuite/ld-i386/call3a.d	[new file with mode: 0644]	blob
ld/testsuite/ld-i386/call3b.d	[new file with mode: 0644]	blob
ld/testsuite/ld-i386/call3c.d	[new file with mode: 0644]	blob
ld/testsuite/ld-i386/call3d.d	[new file with mode: 0644]	blob
ld/testsuite/ld-i386/call3e.d	[new file with mode: 0644]	blob
ld/testsuite/ld-i386/call3f.d	[new file with mode: 0644]	blob
ld/testsuite/ld-i386/call3g.d	[new file with mode: 0644]	blob
ld/testsuite/ld-i386/call3h.d	[new file with mode: 0644]	blob
ld/testsuite/ld-i386/i386.exp		diff \| blob \| blame \| history
ld/testsuite/ld-i386/load1-nacl.d	[new file with mode: 0644]	blob
ld/testsuite/ld-i386/load1.d		diff \| blob \| blame \| history
ld/testsuite/ld-x86-64/call1.s	[new file with mode: 0644]	blob
ld/testsuite/ld-x86-64/call1a.d	[new file with mode: 0644]	blob
ld/testsuite/ld-x86-64/call1b.d	[new file with mode: 0644]	blob
ld/testsuite/ld-x86-64/call1c.d	[new file with mode: 0644]	blob
ld/testsuite/ld-x86-64/call1d.d	[new file with mode: 0644]	blob
ld/testsuite/ld-x86-64/call1e.d	[new file with mode: 0644]	blob
ld/testsuite/ld-x86-64/call1f.d	[new file with mode: 0644]	blob
ld/testsuite/ld-x86-64/call1g.d	[new file with mode: 0644]	blob
ld/testsuite/ld-x86-64/call1h.d	[new file with mode: 0644]	blob
ld/testsuite/ld-x86-64/call1i.d	[new file with mode: 0644]	blob
ld/testsuite/ld-x86-64/load1a-nacl.d	[new file with mode: 0644]	blob
ld/testsuite/ld-x86-64/load1a.d		diff \| blob \| blame \| history
ld/testsuite/ld-x86-64/load1b-nacl.d	[new file with mode: 0644]	blob
ld/testsuite/ld-x86-64/load1b.d		diff \| blob \| blame \| history
ld/testsuite/ld-x86-64/load1c-nacl.d	[new file with mode: 0644]	blob
ld/testsuite/ld-x86-64/load1c.d		diff \| blob \| blame \| history
ld/testsuite/ld-x86-64/load1d-nacl.d	[new file with mode: 0644]	blob
ld/testsuite/ld-x86-64/load1d.d		diff \| blob \| blame \| history
ld/testsuite/ld-x86-64/x86-64.exp		diff \| blob \| blame \| history