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H.J. Lu caa65211bb 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.
2015-10-22 04:56:39 -07:00
..
aout ChangeLog rotatation and copyright year update 2015-01-02 00:53:45 +10:30
cgen ChangeLog rotatation and copyright year update 2015-01-02 00:53:45 +10:30
coff Fixes a buffer overflow when compiling assembler for the MinGW targets. 2015-01-06 16:46:40 +00:00
elf Add R_X86_64_[REX_]GOTPCRELX support to gas and ld 2015-10-22 04:49:38 -07:00
gdb Remove leading/trailing white spaces in ChangeLog 2015-07-24 04:16:47 -07:00
mach-o ChangeLog rotatation and copyright year update 2015-01-02 00:53:45 +10:30
nlm ChangeLog rotatation and copyright year update 2015-01-02 00:53:45 +10:30
opcode Avoid using 'template' C++ keyword 2015-10-07 15:22:47 +01:00
som ChangeLog rotatation and copyright year update 2015-01-02 00:53:45 +10:30
vms ChangeLog rotatation and copyright year update 2015-01-02 00:53:45 +10:30
alloca-conf.h ChangeLog rotatation and copyright year update 2015-01-02 00:53:45 +10:30
ansidecl.h Sync ansidecl.h with GCC 2015-08-12 05:02:21 -07:00
bfdlink.h Add "-z call-nop=PADDING" option to ld 2015-10-22 04:56:39 -07:00
binary-io.h ChangeLog rotatation and copyright year update 2015-01-02 00:53:45 +10:30
bout.h ChangeLog rotatation and copyright year update 2015-01-02 00:53:45 +10:30
ChangeLog Add "-z call-nop=PADDING" option to ld 2015-10-22 04:56:39 -07:00
ChangeLog-9103
COPYING
COPYING3
demangle.h Remove trailing spaces in demangle.h 2015-07-14 09:18:16 -07:00
dis-asm.h New ARC implementation. 2015-10-07 14:20:19 +01:00
dwarf2.def Resync files in the binutils repository that are maintained in the gcc repository. 2015-09-30 17:55:16 +01:00
dwarf2.h Recognize new DWARF5/GCC5 DW_LANG constants for Fortran 03 and Fortran 08. 2015-02-10 09:07:25 +01:00
dyn-string.h ChangeLog rotatation and copyright year update 2015-01-02 00:53:45 +10:30
fibheap.h ChangeLog rotatation and copyright year update 2015-01-02 00:53:45 +10:30
filenames.h Sync filenames.h with gcc 2015-05-01 09:11:15 -07:00
floatformat.h floatformat.h: Wrap in extern "C" 2015-02-19 22:44:44 +00:00
fnmatch.h ChangeLog rotatation and copyright year update 2015-01-02 00:53:45 +10:30
fopen-bin.h ChangeLog rotatation and copyright year update 2015-01-02 00:53:45 +10:30
fopen-same.h ChangeLog rotatation and copyright year update 2015-01-02 00:53:45 +10:30
fopen-vms.h ChangeLog rotatation and copyright year update 2015-01-02 00:53:45 +10:30
gcc-c-fe.def ChangeLog rotatation and copyright year update 2015-01-02 00:53:45 +10:30
gcc-c-interface.h ChangeLog rotatation and copyright year update 2015-01-02 00:53:45 +10:30
gcc-interface.h ChangeLog rotatation and copyright year update 2015-01-02 00:53:45 +10:30
getopt.h ChangeLog rotatation and copyright year update 2015-01-02 00:53:45 +10:30
hashtab.h Sync hashtab.h, splay-tree.h with GCC 2015-07-14 09:18:16 -07:00
hp-symtab.h ChangeLog rotatation and copyright year update 2015-01-02 00:53:45 +10:30
ieee.h ChangeLog rotatation and copyright year update 2015-01-02 00:53:45 +10:30
leb128.h ChangeLog rotatation and copyright year update 2015-01-02 00:53:45 +10:30
libiberty.h Sync libiberty from GCC, replaying updates to configure scripts 2015-06-24 21:43:02 +02:00
longlong.h Sync longlong.h with GCC 2015-07-14 09:18:16 -07:00
lto-symtab.h ChangeLog rotatation and copyright year update 2015-01-02 00:53:45 +10:30
MAINTAINERS ChangeLog rotatation and copyright year update 2015-01-02 00:53:45 +10:30
md5.h ChangeLog rotatation and copyright year update 2015-01-02 00:53:45 +10:30
oasys.h ChangeLog rotatation and copyright year update 2015-01-02 00:53:45 +10:30
objalloc.h ChangeLog rotatation and copyright year update 2015-01-02 00:53:45 +10:30
obstack.h ChangeLog rotatation and copyright year update 2015-01-02 00:53:45 +10:30
os9k.h ChangeLog rotatation and copyright year update 2015-01-02 00:53:45 +10:30
partition.h Merge include/partition.h from GCC. 2015-04-17 16:13:43 +01:00
plugin-api.h ChangeLog rotatation and copyright year update 2015-01-02 00:53:45 +10:30
progress.h ChangeLog rotatation and copyright year update 2015-01-02 00:53:45 +10:30
safe-ctype.h ChangeLog rotatation and copyright year update 2015-01-02 00:53:45 +10:30
sha1.h ChangeLog rotatation and copyright year update 2015-01-02 00:53:45 +10:30
simple-object.h ChangeLog rotatation and copyright year update 2015-01-02 00:53:45 +10:30
sort.h ChangeLog rotatation and copyright year update 2015-01-02 00:53:45 +10:30
splay-tree.h Sync hashtab.h, splay-tree.h with GCC 2015-07-14 09:18:16 -07:00
symcat.h ChangeLog rotatation and copyright year update 2015-01-02 00:53:45 +10:30
timeval-utils.h ChangeLog rotatation and copyright year update 2015-01-02 00:53:45 +10:30
vtv-change-permission.h ChangeLog rotatation and copyright year update 2015-01-02 00:53:45 +10:30
xregex2.h ChangeLog rotatation and copyright year update 2015-01-02 00:53:45 +10:30
xregex.h
xtensa-config.h ChangeLog rotatation and copyright year update 2015-01-02 00:53:45 +10:30
xtensa-isa-internal.h ChangeLog rotatation and copyright year update 2015-01-02 00:53:45 +10:30
xtensa-isa.h ChangeLog rotatation and copyright year update 2015-01-02 00:53:45 +10:30