Date: Fri, 24 Apr 2020 10:03:11 +0000 (UTC) From: Andrew Turner <andrew@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r360247 - head/stand Message-ID: <202004241003.03OA3B2x053200@repo.freebsd.org>
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Author: andrew Date: Fri Apr 24 10:03:11 2020 New Revision: 360247 URL: https://svnweb.freebsd.org/changeset/base/360247 Log: Build the arm64 loader with -ffixed-x18 This stops the compiler from using the x18 register. Some UEFI implementations assume this will be preserved when calling the Boot Services. MFC after: 2 weeks Sponsored by: Innovate UK Modified: head/stand/defs.mk Modified: head/stand/defs.mk ============================================================================== --- head/stand/defs.mk Fri Apr 24 09:32:20 2020 (r360246) +++ head/stand/defs.mk Fri Apr 24 10:03:11 2020 (r360247) @@ -119,7 +119,7 @@ SSP_CFLAGS= # currently has no /boot/loader, but may soon. CFLAGS+= -ffreestanding ${CFLAGS_NO_SIMD} .if ${MACHINE_CPUARCH} == "aarch64" -CFLAGS+= -mgeneral-regs-only -fPIC +CFLAGS+= -mgeneral-regs-only -ffixed-x18 -fPIC .elif ${MACHINE_CPUARCH} == "riscv" CFLAGS+= -march=rv64imac -mabi=lp64 .else
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