From 796c0067ec1a6b6dadde1675dcc2519c41d13d12 Mon Sep 17 00:00:00 2001 From: "H.J. Lu" Date: Tue, 31 Jan 2012 17:54:30 +0000 Subject: Support arch-dependent fill bfd/ 2012-01-31 H.J. Lu PR ld/13616 * archures.c (bfd_arch_info): Add fill. (bfd_default_arch_struct): Add bfd_arch_default_fill. (bfd_arch_default_fill): New. * configure.in: Set bfd version to 2.22.52. * configure: Regenerated. * cpu-alpha.c: Add bfd_arch_default_fill to bfd_arch_info initializer. * cpu-arc.c: Likewise. * cpu-arm.c: Likewise. * cpu-avr.c: Likewise. * cpu-bfin.c: Likewise. * cpu-cr16.c: Likewise. * cpu-cr16c.c: Likewise. * cpu-cris.c: Likewise. * cpu-crx.c: Likewise. * cpu-d10v.c: Likewise. * cpu-d30v.c: Likewise. * cpu-dlx.c: Likewise. * cpu-epiphany.c: Likewise. * cpu-fr30.c: Likewise. * cpu-frv.c: Likewise. * cpu-h8300.c: Likewise. * cpu-h8500.c: Likewise. * cpu-hppa.c: Likewise. * cpu-i370.c: Likewise. * cpu-i860.c: Likewise. * cpu-i960.c: Likewise. * cpu-ia64.c: Likewise. * cpu-ip2k.c: Likewise. * cpu-iq2000.c: Likewise. * cpu-lm32.c: Likewise. * cpu-m10200.c: Likewise. * cpu-m10300.c: Likewise. * cpu-m32c.c: Likewise. * cpu-m32r.c: Likewise. * cpu-m68hc11.c: Likewise. * cpu-m68hc12.c: Likewise. * cpu-m68k.c: Likewise. * cpu-m88k.c: Likewise. * cpu-mcore.c: Likewise. * cpu-mep.c: Likewise. * cpu-microblaze.c: Likewise. * cpu-mips.c: Likewise. * cpu-mmix.c: Likewise. * cpu-moxie.c: Likewise. * cpu-msp430.c: Likewise. * cpu-mt.c: Likewise. * cpu-ns32k.c: Likewise. * cpu-openrisc.c: Likewise. * cpu-or32.c: Likewise. * cpu-pdp11.c: Likewise. * cpu-pj.c: Likewise. * cpu-plugin.c: Likewise. * cpu-powerpc.c: Likewise. * cpu-rl78.c: Likewise. * cpu-rs6000.c: Likewise. * cpu-rx.c: Likewise. * cpu-s390.c: Likewise. * cpu-score.c: Likewise. * cpu-sh.c: Likewise. * cpu-sparc.c: Likewise. * cpu-spu.c: Likewise. * cpu-tic30.c: Likewise. * cpu-tic4x.c: Likewise. * cpu-tic54x.c: Likewise. * cpu-tic6x.c: Likewise. * cpu-tic80.c: Likewise. * cpu-tilegx.c: Likewise. * cpu-tilepro.c: Likewise. * cpu-v850.c: Likewise. * cpu-vax.c: Likewise. * cpu-w65.c: Likewise. * cpu-we32k.c: Likewise. * cpu-xc16x.c: Likewise. * cpu-xstormy16.c: Likewise. * cpu-xtensa.c: Likewise. * cpu-z80.c: Likewise. * cpu-z8k.c: Likewise. * cpu-i386.c: Include "libiberty.h". (bfd_arch_i386_fill): New. Add bfd_arch_i386_fill to bfd_arch_info initializer. * cpu-k1om.c: Add bfd_arch_i386_fill to bfd_arch_info initializer. * cpu-l1om.c: Likewise. * linker.c (default_data_link_order): Call abfd->arch_info->fill if fill size is 0. * bfd-in2.h: Regenerated. include/ 2012-01-31 H.J. Lu PR ld/13616 * bfdlink.h (bfd_link_order): Update comments on data size. ld/ 2012-01-31 H.J. Lu PR ld/13616 * emulparams/elf32_x86_64.sh: Remove NOP. * emulparams/elf_i386.sh: Likewise. * emulparams/elf_i386_be.sh: Likewise. * emulparams/elf_i386_ldso.sh: Likewise. * emulparams/elf_i386_vxworks.sh: Likewise. * emulparams/elf_k1om.sh: Likewise. * emulparams/elf_l1om.sh: Likewise. * emulparams/elf_x86_64.sh: Likewise. * ldlang.c (zero_fill): Initialized to 0. * ldwrite.c (build_link_order): Set data size to linker odrder size when they are the same. * scripttempl/elf.sc: Don't specify fill if NOP is undefined. ld/testsuite/ 2012-01-31 H.J. Lu PR ld/13616 * ld-i386/tlsbindesc.dd: Update no-op padding. * ld-i386/tlsnopic.dd: Likewise. * ld-i386/tlspic.dd: Likewise. * ld-x86-64/tlsbin.dd: Likewise. * ld-x86-64/tlsbindesc.dd: Likewise. * ld-x86-64/tlspic.dd: Likewise. --- bfd/cpu-i386.c | 66 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 66 insertions(+) (limited to 'bfd/cpu-i386.c') diff --git a/bfd/cpu-i386.c b/bfd/cpu-i386.c index f98c0e5052..f8991cf1ec 100644 --- a/bfd/cpu-i386.c +++ b/bfd/cpu-i386.c @@ -23,6 +23,9 @@ #include "sysdep.h" #include "bfd.h" #include "libbfd.h" +#include "libiberty.h" + +extern void * bfd_arch_i386_fill (bfd_size_type, bfd_boolean, bfd_boolean); static const bfd_arch_info_type * bfd_i386_compatible (const bfd_arch_info_type *a, @@ -38,6 +41,62 @@ bfd_i386_compatible (const bfd_arch_info_type *a, return compat; } +/* Fill the buffer with zero or nop instruction if CODE is TRUE. */ + +void * +bfd_arch_i386_fill (bfd_size_type count, + bfd_boolean is_bigendian ATTRIBUTE_UNUSED, + bfd_boolean code) +{ + /* nop */ + static const char nop_1[] = { 0x90 }; + /* nopw */ + static const char nop_2[] = { 0x66, 0x90 }; + /* nopl (%[re]ax) */ + static const char nop_3[] = { 0x0f, 0x1f, 0x00 }; + /* nopl 0(%[re]ax) */ + static const char nop_4[] = { 0x0f, 0x1f, 0x40, 0x00 }; + /* nopl 0(%[re]ax,%[re]ax,1) */ + static const char nop_5[] = { 0x0f, 0x1f, 0x44, 0x00, 0x00 }; + /* nopw 0(%[re]ax,%[re]ax,1) */ + static const char nop_6[] = { 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 }; + /* nopl 0L(%[re]ax) */ + static const char nop_7[] = { 0x0f, 0x1f, 0x80, 0x00, 0x00, 0x00, 0x00 }; + /* nopl 0L(%[re]ax,%[re]ax,1) */ + static const char nop_8[] = + { 0x0f, 0x1f, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00}; + /* nopw 0L(%[re]ax,%[re]ax,1) */ + static const char nop_9[] = + { 0x66, 0x0f, 0x1f, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00 }; + /* nopw %cs:0L(%[re]ax,%[re]ax,1) */ + static const char nop_10[] = + { 0x66, 0x2e, 0x0f, 0x1f, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00 }; + static const char *const nops[] = + { nop_1, nop_2, nop_3, nop_4, nop_5, + nop_6, nop_7, nop_8, nop_9, nop_10 }; + + void *fill = bfd_malloc (count); + if (fill == NULL) + return fill; + + if (code) + { + bfd_byte *p = fill; + while (count >= ARRAY_SIZE (nops)) + { + memcpy (p, nops[ARRAY_SIZE (nops) - 1], ARRAY_SIZE (nops)); + p += ARRAY_SIZE (nops); + count -= ARRAY_SIZE (nops); + } + if (count != 0) + memcpy (p, nops[count - 1], count); + } + else + memset (fill, 0, count); + + return fill; +} + static const bfd_arch_info_type bfd_x64_32_arch_intel_syntax = { 64, /* 64 bits in a word */ @@ -51,6 +110,7 @@ static const bfd_arch_info_type bfd_x64_32_arch_intel_syntax = FALSE, bfd_i386_compatible, bfd_default_scan, + bfd_arch_i386_fill, 0 }; @@ -67,6 +127,7 @@ static const bfd_arch_info_type bfd_x86_64_arch_intel_syntax = FALSE, bfd_i386_compatible, bfd_default_scan, + bfd_arch_i386_fill, &bfd_x64_32_arch_intel_syntax, }; @@ -83,6 +144,7 @@ static const bfd_arch_info_type bfd_i386_arch_intel_syntax = TRUE, bfd_i386_compatible, bfd_default_scan, + bfd_arch_i386_fill, &bfd_x86_64_arch_intel_syntax }; @@ -99,6 +161,7 @@ static const bfd_arch_info_type i8086_arch = FALSE, bfd_i386_compatible, bfd_default_scan, + bfd_arch_i386_fill, &bfd_i386_arch_intel_syntax }; @@ -115,6 +178,7 @@ static const bfd_arch_info_type bfd_x64_32_arch = FALSE, bfd_i386_compatible, bfd_default_scan, + bfd_arch_i386_fill, &i8086_arch }; @@ -131,6 +195,7 @@ static const bfd_arch_info_type bfd_x86_64_arch = FALSE, bfd_i386_compatible, bfd_default_scan, + bfd_arch_i386_fill, &bfd_x64_32_arch }; @@ -147,5 +212,6 @@ const bfd_arch_info_type bfd_i386_arch = TRUE, bfd_i386_compatible, bfd_default_scan, + bfd_arch_i386_fill, &bfd_x86_64_arch }; -- cgit v1.2.1