Date: Mon, 2 May 2011 16:38:45 GMT From: Damjan Marion <damjan.marion@gmail.com> To: freebsd-gnats-submit@FreeBSD.org Subject: arm/156771: FreeBSD/arm fails to build trampoline code with clang due to missing -ffreestanding Message-ID: <201105021638.p42Gcj7f071073@red.freebsd.org> Resent-Message-ID: <201105021640.p42GeAvI070046@freefall.freebsd.org>
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>Number: 156771
>Category: arm
>Synopsis: FreeBSD/arm fails to build trampoline code with clang due to missing -ffreestanding
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: freebsd-arm
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Mon May 02 16:40:10 UTC 2011
>Closed-Date:
>Last-Modified:
>Originator: Damjan Marion
>Release: -CURRENT
>Organization:
n/a
>Environment:
>Description:
clang compiler produces optimized code which calls memset which is missing when kernel.trampoline is linked.
inflate-tramp.o: In function `inflate_dynamic':
/Volumes/data/src/freebsd/sys/kern/inflate.c:(.text+0x538): undefined reference to `memset'
inflate-tramp.o: In function `huft_build':
/Volumes/data/src/freebsd/sys/kern/inflate.c:(.text+0xb1c): undefined reference to `memset'
This can be avoided by passing -ffreestanding (diff attached).
>How-To-Repeat:
>Fix:
diff --git a/sys/conf/Makefile.arm b/sys/conf/Makefile.arm
index 756945d..d067fb3 100644
--- a/sys/conf/Makefile.arm
+++ b/sys/conf/Makefile.arm
@@ -108,7 +108,7 @@ ${KERNEL_KO}.tramp: ${KERNEL_KO} $S/$M/$M/inckern.S $S/$M/$M/elf_trampoline.c
gzip -9 ${KERNEL_KO}.tmp
eval $$(stat -s ${KERNEL_KO}.tmp.gz) && \
echo "#define KERNCOMPSIZE $$st_size" >>opt_kernname.h
- ${CC} -O2 -DKZIP -I. -I$S -c $S/kern/inflate.c -o inflate-tramp.o
+ ${CC} -O2 -ffreestanding -DKZIP -I. -I$S -c $S/kern/inflate.c -o inflate-tramp.o
${CC} -O -nostdlib -I. -I$S -Xlinker -T -Xlinker ldscript.$M.tramp \
-DKZIP tmphack.S $S/$M/$M/elf_trampoline.c inflate-tramp.o \
$S/$M/$M/inckern.S ${FILES_CPU_FUNC} -o ${KERNEL_KO}.gz.tramp
>Release-Note:
>Audit-Trail:
>Unformatted:
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