devel/freebsd-gcc9 at aarch64 and devel/binutils at aarch64: locore.S vs. gcc toolchain notational mismatch (icc_sre_el2)

[Mark Millard]

/usr/src/sys/arm64/arm64/locore.S: Assembler messages:
/usr/src/sys/arm64/arm64/locore.S:282: Error: unknown or missing system register name at operand 2 -- `mrs x2,icc_sre_el2'
/usr/src/sys/arm64/arm64/locore.S:285: Error: unknown or missing system register name at operand 1 -- `msr icc_sre_el2,x2'
*** [locore.o] Error code 1

make[2]: stopped in /usr/obj/cortexA53_xtoolchain-gcc/arm64.aarch64/usr/src/arm64.aarch64/sys/GENERIC-NODBG
.ERROR_TARGET='locore.o'
.ERROR_META_FILE='/usr/obj/cortexA53_xtoolchain-gcc/arm64.aarch64/usr/src/arm64.aarch64/sys/GENERIC-NODBG/locore.o.meta'
.MAKE.LEVEL='2'
MAKEFILE=''
.MAKE.MODE='meta missing-filemon=yes missing-meta=yes silent=yes verbose curdirOk=yes'
_ERROR_CMD='/usr/local/bin/aarch64-unknown-freebsd13.0-gcc9 -mcpu=cortex-a53 --sysroot=/usr/obj/cortexA53_xtoolchain-gcc/arm64.aarch64/usr/src/arm64.aarch64/tmp -B/usr/local/aarch64-unknown-freebsd13.0/bin/ -c -x assembler-with-cpp -DLOCORE -O -pipe  -g -nostdinc  -I. -I/usr/src/sys -I/usr/src/sys/contrib/ck/include -I/usr/src/sys/contrib/libfdt -D_KERNEL -DHAVE_KERNEL_OPTION_HEADERS -include opt_global.h    -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer -fdebug-prefix-map=./machine=/usr/src/sys/arm64/include -mgeneral-regs-only -ffixed-x18 -ffreestanding -fwrapv -fstack-protector -gdwarf-2 -Wall -Wredundant-decls -Wnested-externs -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Wcast-qual -Wundef -Wno-pointer-sign -fformat-extensions -Wmissing-include-dirs -fdiagnostics-show-option -Wno-unknown-pragmas -Wno-error=address -Wno-error=aggressive-loop-optimizations -Wno-error=array-bounds -Wno-error=attributes -Wno-error=cast-qual -Wno-error=enum-compare -Wno-error=inline -Wno-error=maybe-uninitialized -Wno-error=overflow -Wno-error=sequence-point -Wno-unused-but-set-variable -Wno-error=misleading-indentation -Wno-error=nonnull-compare -Wno-error=shift-overflow -Wno-error=tautological-compare -Wno-error=stringop-overflow -Wno-error=memset-elt-size -Wno-error=packed-not-aligned -Wno-address-of-packed-member -Wno-format-zero-length   -v -fno-common -fms-extensions -finline-limit=8000 --param inline-unit-growth=100 --param large-function-growth=1000 -fms-extensions  -std=iso9899:1999  -Werror /usr/src/sys/arm64/arm64/locore.S;'
.CURDIR='/usr/obj/cortexA53_xtoolchain-gcc/arm64.aarch64/usr/src/arm64.aarch64/sys/GENERIC-NODBG'

FYI:

# grep -U5 icc_sre_el2 /usr/src/sys/arm64/arm64/locore.S
	ubfx	x2, x2, #ID_AA64PFR0_GIC_SHIFT, #ID_AA64PFR0_GIC_BITS
	/* GIC[3:0] == 0001 - GIC CPU interface via special regs. supported */
	cmp	x2, #(ID_AA64PFR0_GIC_CPUIF_EN >> ID_AA64PFR0_GIC_SHIFT)
	b.ne	2f

	mrs	x2, icc_sre_el2
	orr	x2, x2, #ICC_SRE_EL2_EN	/* Enable access from insecure EL1 */
	orr	x2, x2, #ICC_SRE_EL2_SRE	/* Enable system registers */
	msr	icc_sre_el2, x2
2:

	/* Set the address to return to our return address */
	msr	elr_el2, x30
	isb


(devel/freebsd-gcc6 likely has the same status.)

The context was head -r355976 based.

===
Mark Millard
marklmi at yahoo.com
( dsl-only.net went
away in early 2018-Mar)