diff options
Diffstat (limited to 'arch/mips/Makefile')
| -rw-r--r-- | arch/mips/Makefile | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/mips/Makefile b/arch/mips/Makefile index f62a6d951d3c..e71d587af49c 100644 --- a/arch/mips/Makefile +++ b/arch/mips/Makefile @@ -136,11 +136,31 @@ cflags-$(CONFIG_SB1XXX_CORELIS) += $(call cc-option,-mno-sched-prolog) \ # cflags-y += -fno-stack-check +# binutils from v2.35 when built with --enable-mips-fix-loongson3-llsc=yes, +# supports an -mfix-loongson3-llsc flag which emits a sync prior to each ll +# instruction to work around a CPU bug (see __SYNC_loongson3_war in asm/sync.h +# for a description). +# +# We disable this in order to prevent the assembler meddling with the +# instruction that labels refer to, ie. if we label an ll instruction: +# +# 1: ll v0, 0(a0) +# +# ...then with the assembler fix applied the label may actually point at a sync +# instruction inserted by the assembler, and if we were using the label in an +# exception table the table would no longer contain the address of the ll +# instruction. +# +# Avoid this by explicitly disabling that assembler behaviour. +# +cflags-y += $(call as-option,-Wa$(comma)-mno-fix-loongson3-llsc,) + # # CPU-dependent compiler/assembler options for optimization. # cflags-$(CONFIG_CPU_R3000) += -march=r3000 cflags-$(CONFIG_CPU_TX39XX) += -march=r3900 +cflags-$(CONFIG_CPU_R4300) += -march=r4300 -Wa,--trap cflags-$(CONFIG_CPU_VR41XX) += -march=r4100 -Wa,--trap cflags-$(CONFIG_CPU_R4X00) += -march=r4600 -Wa,--trap cflags-$(CONFIG_CPU_TX49XX) += -march=r4600 -Wa,--trap |