binutils-gdb

mirror of https://sourceware.org/git/binutils-gdb.git synced 2025-01-12 12:16:04 +08:00

History

Nelson Chu abd20cb637 RISC-V: Relax PCREL to GPREL while doing other relaxations is dangerous. I get the feedback recently that enable linker relaxations may fail to build some program. Consider the following case, .text foo: addi a0, a0, %pcrel_lo(.L2) call foo .L1: auipc a1, %pcrel_hi(data_g) addi a1, a1, %pcrel_lo(.L1) lui a2, %hi(data_g) addi a2, a2, %lo(data_g) lui a3, %tprel_hi(data_t) add a3, a3, tp, %tprel_add(data_t) addi a3, a3, %tprel_lo(data_t) .L2: auipc a0, %pcrel_hi(data_g) .data .word 0x0 .global data_g data_g: .word 0x1 .section .tbss data_t: .word 0x0 The current ld reports `dangerous relocation error` when doing the pcgp relaxation, test.o: in function `foo': (.text+0x0): dangerous relocation: %pcrel_lo missing matching %pcrel_hi The .L2 auipc should not be removed since it is behind the corresponding addi, so we record the information in the pcgp_relocs table to avoid removing the auipc later. But current ld still remove it since we do not update the pcgp_relocs table while doing other relaxations. I have two solutions to fix the problem, 1. Update the pcgp_relocs table once we actually delete the code. 2. Add new relax pass to do the pcgp relaxations At first I tried to do the first solution, and we need to update at least three information - hi_sec_off of riscv_pcgp_lo_reloc, hi_sec_off and hi_addr (symbol value) of riscv_pcgp_hi_reloc. Update the hi_sec_off is simple, but it is more complicate to update the symbol value, since we almost have to do parts the same works of _bfd_riscv_relax_call again in the riscv_relax_delete_bytes to get the correct symbol value. Compared with the first solution, the second one is more intuitive and simple. We add a new relax pass to do the pcgp relaxations later, so we will get all the information correctly in the _bfd_riscv_relax_call, including the symbol value, without changing so much code. I do not see any penalty by adding a new relax pass for now, so it should be fine to delay the pcgp relaxations. Besides, I have pass all riscv-gnu-toolchain regressions for this patch. bfd/ * elfnn-riscv.c (_bfd_riscv_relax_section): Add a new relax pass to do the pcgp relaxation later, after the lui and call relaxations, but before the delete and alignment relaxations. ld/ * emultempl/riscvelf.em (riscv_elf_before_allocation): Change link_info.relax_pass from 3 to 4. * testsuite/ld-riscv-elf/pcgp-relax.d: New testcase. * testsuite/ld-riscv-elf/pcgp-relax.s: Likewise. * testsuite/ld-riscv-elf/ld-riscv-elf.exp: Updated.		2020-11-21 09:41:58 +08:00
..
doc
hosts
po	Fix printf formatting errors where "0x" is used as a prefix for a decimal number.	2020-10-22 12:00:10 +01:00
.gitignore
acinclude.m4
aclocal.m4
aix5ppc-core.c
aix386-core.c
aout32.c
aout64.c
aout-cris.c
aout-ns32k.c
aout-target.h
aoutx.h
arc-got.h
arc-plt.def
arc-plt.h
archive64.c
archive.c	Fix Windows-x-PPC build	2020-11-11 06:38:43 -07:00
archures.c	aarch64: Add base support for Armv8-R	2020-09-08 14:14:11 +01:00
bfd-in2.h	MSP430: Support relocations for subtract expressions in .uleb128 directives	2020-09-08 16:18:38 +01:00
bfd-in.h
bfd.c
bfd.m4
bfdio.c
bfdwin.c
binary.c
cache.c
cf-i386lynx.c
ChangeLog	RISC-V: Relax PCREL to GPREL while doing other relaxations is dangerous.	2020-11-21 09:41:58 +08:00
ChangeLog-0001
ChangeLog-0203
ChangeLog-2004
ChangeLog-2005
ChangeLog-2006
ChangeLog-2007
ChangeLog-2008
ChangeLog-2009
ChangeLog-2010
ChangeLog-2011
ChangeLog-2012
ChangeLog-2013
ChangeLog-2014
ChangeLog-2015
ChangeLog-2016
ChangeLog-2017
ChangeLog-2018
ChangeLog-2019
ChangeLog-9193
ChangeLog-9495
ChangeLog-9697
ChangeLog-9899
cisco-core.c
coff64-rs6000.c
coff-alpha.c
coff-arm.c
coff-arm.h
coff-bfd.c
coff-bfd.h
coff-go32.c
coff-i386.c
coff-ia64.c
coff-mcore.c
coff-mips.c
coff-rs6000.c	xcoff dependency list for static libraries	2020-11-09 14:09:01 +10:30
coff-sh.c
coff-stgo32.c
coff-tic4x.c
coff-tic30.c
coff-tic54x.c
coff-x86_64.c	PE/x86-64: Display PE relocation names	2020-09-15 13:56:40 -07:00
coff-z8k.c
coff-z80.c
coffcode.h
coffgen.c
cofflink.c	Fix thinko in the code to check coff archive elements.	2020-09-09 15:00:55 +01:00
coffswap.h
compress.c
config.bfd	PR26667, Add powerpc64le--freebsd support	2020-10-06 17:09:27 +10:30
config.in	PR26469 UBSAN: elflink.c:8742 shift exponent 6148914691236511722	2020-08-27 22:05:00 +09:30
configure	RISC-V: Support GNU indirect functions.	2020-10-16 10:11:18 +08:00
configure.ac	RISC-V: Support GNU indirect functions.	2020-10-16 10:11:18 +08:00
configure.com
configure.host
COPYING
corefile.c
cpu-aarch64.c	aarch64: Add base support for Armv8-R	2020-09-08 14:14:11 +01:00
cpu-aarch64.h
cpu-alpha.c
cpu-arc.c
cpu-arm.c	arm: Add support for Cortex-A78C	2020-11-16 20:28:14 +00:00
cpu-arm.h
cpu-avr.c
cpu-bfin.c
cpu-bpf.c
cpu-cr16.c
cpu-cris.c
cpu-crx.c
cpu-csky.c
cpu-d10v.c
cpu-d30v.c
cpu-dlx.c
cpu-epiphany.c
cpu-fr30.c
cpu-frv.c
cpu-ft32.c
cpu-h8300.c
cpu-h8300.h
cpu-hppa.c
cpu-i386.c
cpu-ia64-opc.c
cpu-ia64.c
cpu-iamcu.c
cpu-ip2k.c
cpu-iq2000.c
cpu-k1om.c
cpu-l1om.c
cpu-lm32.c
cpu-m9s12x.c
cpu-m9s12xg.c
cpu-m32c.c
cpu-m32r.c
cpu-m68hc11.c
cpu-m68hc12.c
cpu-m68k.c
cpu-m68k.h
cpu-m10200.c
cpu-m10300.c
cpu-mcore.c
cpu-mep.c
cpu-metag.c
cpu-microblaze.c
cpu-mips.c
cpu-mmix.c
cpu-moxie.c
cpu-msp430.c
cpu-mt.c
cpu-nds32.c
cpu-nfp.c
cpu-nios2.c
cpu-ns32k.c
cpu-or1k.c
cpu-pdp11.c
cpu-pj.c
cpu-powerpc.c
cpu-pru.c
cpu-riscv.c
cpu-rl78.c
cpu-rs6000.c
cpu-rx.c
cpu-s12z.c
cpu-s390.c
cpu-score.c
cpu-sh.c
cpu-sparc.c
cpu-spu.c
cpu-tic4x.c
cpu-tic6x.c
cpu-tic30.c
cpu-tic54x.c
cpu-tilegx.c
cpu-tilepro.c
cpu-v850_rh850.c
cpu-v850.c
cpu-vax.c
cpu-visium.c
cpu-wasm32.c
cpu-xc16x.c
cpu-xgate.c
cpu-xstormy16.c
cpu-xtensa.c
cpu-z8k.c
cpu-z80.c
dep-in.sed
development.sh
dwarf1.c
dwarf2.c	Include members in the variable table used when resolving DW_AT_specification tags.	2020-08-29 08:03:15 +01:00
ecoff-bfd.h
ecoff.c
ecofflink.c	PR26418 UBSAN: cache.c:386 null pointer fwrite	2020-08-28 23:15:20 +09:30
ecoffswap.h
elf32-am33lin.c
elf32-arc.c	elf32-arc.c: Don't cast between function pointer and void pointer	2020-10-16 10:35:23 +10:30
elf32-arm.c	arm: ubsan: shift exponent 4G	2020-09-01 16:02:48 +09:30
elf32-arm.h
elf32-avr.c	Fix sanitization problems in the BFD library when running the linker testsuite for the AVR target.	2020-08-26 17:43:39 +01:00
elf32-avr.h
elf32-bfin.c
elf32-bfin.h
elf32-cr16.c	elf32-cr16.c tidy	2020-10-16 09:32:56 +10:30
elf32-cr16.h
elf32-cris.c	CRIS: fix PR ld/26589, a missing NULL check in fix for PR ld/22269	2020-09-15 02:57:39 +02:00
elf32-crx.c	PR26442 UBSAN: elf32-crx.c:512 cannot be represented in int	2020-08-31 20:28:09 +09:30
elf32-csky.c	PR26445 UBSAN: elf32-csky.c:4115 left shift of negative value	2020-08-31 20:28:09 +09:30
elf32-csky.h
elf32-d10v.c
elf32-d30v.c
elf32-dlx.c
elf32-dlx.h
elf32-epiphany.c
elf32-fr30.c
elf32-frv.c
elf32-ft32.c
elf32-gen.c
elf32-h8300.c
elf32-hppa.c
elf32-hppa.h
elf32-i386.c
elf32-ip2k.c
elf32-iq2000.c
elf32-lm32.c
elf32-m32c.c
elf32-m32r.c
elf32-m68hc1x.c
elf32-m68hc1x.h
elf32-m68hc11.c
elf32-m68hc12.c
elf32-m68k.c
elf32-m68k.h
elf32-mcore.c
elf32-mep.c	PR26466 UBSAN: elf32-mep.c:300 left shift of negative value	2020-08-31 20:28:10 +09:30
elf32-metag.c
elf32-metag.h
elf32-microblaze.c
elf32-mips.c
elf32-moxie.c
elf32-msp430.c	MSP430: Support relocations for subtract expressions in .uleb128 directives	2020-09-08 16:18:38 +01:00
elf32-mt.c
elf32-nds32.c
elf32-nds32.h
elf32-nios2.c
elf32-nios2.h
elf32-or1k.c
elf32-pj.c
elf32-ppc.c
elf32-ppc.h
elf32-pru.c	ubasn: elf32-pru.c:570 left shift of negative value	2020-09-02 16:30:42 +09:30
elf32-rl78.c
elf32-rx.c
elf32-rx.h
elf32-s12z.c
elf32-s390.c
elf32-score7.c
elf32-score.c
elf32-score.h
elf32-sh-relocs.h
elf32-sh.c
elf32-sparc.c
elf32-spu.c	PR26498 UBSAN: elf32-spu.c:2292 left shift overflow	2020-08-26 23:23:45 +09:30
elf32-spu.h
elf32-tic6x.c
elf32-tic6x.h
elf32-tilegx.c
elf32-tilegx.h
elf32-tilepro.c
elf32-tilepro.h
elf32-v850.c
elf32-v850.h
elf32-vax.c
elf32-visium.c
elf32-wasm32.c
elf32-xc16x.c
elf32-xgate.c
elf32-xstormy16.c
elf32-xtensa.c	PR26507 UBSAN: elf32-xtensa.c:6013 null pointer bsearch	2020-08-26 23:23:45 +09:30
elf32-z80.c
elf32.c
elf64-alpha.c	Re: commit `eae0b5c3b2`	2020-08-27 21:56:33 +09:30
elf64-bpf.c
elf64-gen.c
elf64-hppa.c	Fix seg-fault when running the ld testsuite for the hppa64-linux target.	2020-10-27 16:23:09 +00:00
elf64-hppa.h
elf64-ia64-vms.c
elf64-mips.c
elf64-mmix.c
elf64-nfp.c
elf64-ppc.c	R_PPC64_GOT_LO_DS and R_PPC64_GOT_HA sanity check	2020-10-16 09:26:32 +10:30
elf64-ppc.h	PR26655, Power10 libstdc++.so R_PPC64_NONE dynamic relocs	2020-09-24 07:52:53 +09:30
elf64-s390.c	Fix a bug in the s390x linker when discarding all inpuit files.	2020-11-19 17:36:24 +00:00
elf64-sparc.c
elf64-tilegx.c
elf64-tilegx.h
elf64-x86-64.c
elf64.c
elf-attrs.c
elf-bfd.h	Support SHF_GNU_RETAIN ELF section flag	2020-11-18 11:51:13 +00:00
elf-eh-frame.c
elf-hppa.h
elf-ifunc.c
elf-linker-x86.h	x86: Support GNU_PROPERTY_X86_ISA_1_V[234] marker	2020-10-09 05:13:26 -07:00
elf-linux-core.h
elf-m10200.c
elf-m10300.c	mn10300: ubsan: shift exponent too large	2020-08-31 20:28:08 +09:30
elf-nacl.c
elf-nacl.h
elf-properties.c
elf-s390-common.c
elf-s390.h
elf-strtab.c
elf-vxworks.c
elf-vxworks.h
elf.c	bfd, include, ld, binutils, libctf: CTF should use the dynstr/sym	2020-11-20 13:34:07 +00:00
elfcode.h	PR26574, heap buffer overflow in _bfd_elf_slurp_secondary_reloc_section	2020-09-04 19:29:02 +09:30
elfcore.h
elflink.c	bfd, include, ld, binutils, libctf: CTF should use the dynstr/sym	2020-11-20 13:34:07 +00:00
elfn32-mips.c
elfnn-aarch64.c	aarch64: Return an error on conditional branch to an undefined symbol	2020-09-10 21:42:37 +05:30
elfnn-ia64.c	PR26459 UBSAN: elfnn-ia64.c:1945 null pointer bsearch	2020-08-29 13:16:42 +09:30
elfnn-riscv.c	RISC-V: Relax PCREL to GPREL while doing other relaxations is dangerous.	2020-11-21 09:41:58 +08:00
elfxx-aarch64.c
elfxx-aarch64.h
elfxx-ia64.c	PR26461 UBSAN: elfxx-ia64.c:747 cannot be represented	2020-08-31 20:28:10 +09:30
elfxx-ia64.h
elfxx-mips.c	PR26476, PR26477 UBSAN: elfxx-mips.c:2695,5370 cannot be represented	2020-08-31 20:28:10 +09:30
elfxx-mips.h
elfxx-riscv.c	RISC-V: Support GNU indirect functions.	2020-10-16 10:11:18 +08:00
elfxx-riscv.h
elfxx-sparc.c	Skip IFUNC relocations in debug sections ignored by ld.so. Fixes some ld test failures on sparc-linux-gnu.	2020-09-17 10:45:39 +01:00
elfxx-sparc.h
elfxx-target.h
elfxx-tilegx.c
elfxx-tilegx.h
elfxx-x86.c	x86: Support GNU_PROPERTY_X86_ISA_1_BASELINE marker	2020-10-30 06:50:10 -07:00
elfxx-x86.h
format.c
gen-aout.c
genlink.h
go32stub.h
hash.c
host-aout.c
hppabsd-core.c
hpux-core.c
i386aout.c
i386bsd.c
i386lynx.c
i386msdos.c
ihex.c
init.c
irix-core.c
libaout.h
libbfd-in.h	Re: MSP430: Support relocations for subtract expressions in .uleb128 directives	2020-09-09 08:41:28 +09:30
libbfd.c	MSP430: Support relocations for subtract expressions in .uleb128 directives	2020-09-08 16:18:38 +01:00
libbfd.h	Re: MSP430: Support relocations for subtract expressions in .uleb128 directives	2020-09-09 08:41:28 +09:30
libcoff-in.h
libcoff.h
libecoff.h
libhppa.h
libpei.h
libxcoff.h
linker.c	Prevent the linker from overestimating the alignment requirement of common symbols on targets with octets that are larger than one byte.	2020-08-28 13:27:16 +01:00
lynx-core.c
mach-o-aarch64.c
mach-o-arm.c
mach-o-i386.c
mach-o-target.c
mach-o-x86-64.c
mach-o.c
mach-o.h
MAINTAINERS
Makefile.am
Makefile.in
makefile.vms
mep-relocs.pl	PR26466 UBSAN: elf32-mep.c:300 left shift of negative value	2020-08-31 20:28:10 +09:30
merge.c
mmo.c
netbsd-core.c
netbsd.h
ns32k.h
ns32knetbsd.c
opncls.c
osf-core.c
pc532-mach.c
pdp11.c
pe-arm-wince.c
pe-arm.c
pe-i386.c
pe-mcore.c
pe-sh.c
pe-x86_64.c
pef-traceback.h
pef.c
pef.h
pei-arm-wince.c
pei-arm.c
pei-i386.c
pei-ia64.c
pei-mcore.c
pei-sh.c
pei-x86_64.c
peicode.h
peXXigen.c
plugin.c	Stop the plugin handler from ignoring unknown symbol types when conanicalizing weak definitions.	2020-09-08 09:49:15 +01:00
plugin.h
PORTING
ppcboot.c
ptrace-core.c
README
reloc16.c
reloc.c	elf/x86-64: Adjust relocation for PE/x86-64 inputs	2020-09-16 07:11:31 -07:00
rs6000-core.c
sco5-core.c
section.c
simple.c
som.c	Fix PR binutils/26356 on hppa--hpux*.	2020-08-27 15:25:03 +00:00
som.h
srec.c	Fix a potential illegal memory access when creating an srec format file.	2020-10-28 11:07:02 +00:00
stab-syms.c
stabs.c
stamp-h.in
syms.c
sysdep.h	Fix Windows-x-PPC build	2020-11-11 06:38:43 -07:00
targets.c	PR26667, Add powerpc64le--freebsd support	2020-10-06 17:09:27 +10:30
targmatch.sed
tekhex.c
TODO
trad-core.c
vax1knetbsd.c
vaxnetbsd.c
verilog.c	Oops - failed to commit change to verilog.c. Trying again.	2020-09-16 16:19:53 +01:00
version.h	Automatic date update in version.in	2020-11-21 00:00:17 +00:00
version.m4
vms-alpha.c	asan: vms-alpha: stack buffer overflow	2020-11-09 23:27:46 +10:30
vms-lib.c
vms-misc.c	asan: alpha-vms: buffer overflow	2020-10-25 22:25:45 +10:30
vms.h
warning.m4
wasm-module.c
wasm-module.h
xcofflink.c	heap use after free in xcoff_archive_info_eq	2020-09-03 11:04:46 +09:30
xcofflink.h
xsym.c
xsym.h
xtensa-isa.c
xtensa-modules.c

README

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BFD is an object file library.  It permits applications to use the
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BFD is used by the GNU debugger, assembler, linker, and the binary
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