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SUSE:SLE-12-SP2:GA
qemu-linux-user.3556
0011-linux-user-add-binfmt-wrapper-for-a.patch
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File 0011-linux-user-add-binfmt-wrapper-for-a.patch of Package qemu-linux-user.3556
From b8ddc9be4ce4f8249bcd52eb4746caec0808bf00 Mon Sep 17 00:00:00 2001 From: Alexander Graf <agraf@suse.de> Date: Fri, 30 Sep 2011 19:40:36 +0200 Subject: [PATCH] linux-user: add binfmt wrapper for argv[0] handling MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit When using qemu's linux-user binaries through binfmt, argv[0] gets lost along the execution because qemu only gets passed in the full file name to the executable while argv[0] can be something completely different. This breaks in some subtile situations, such as the grep and make test suites. This patch adds a wrapper binary called qemu-$TARGET-binfmt that can be used with binfmt's P flag which passes the full path _and_ argv[0] to the binfmt handler. The binary would be smart enough to be versatile and only exist in the system once, creating the qemu binary path names from its own argv[0]. However, this seemed like it didn't fit the make system too well, so we're currently creating a new binary for each target archictecture. CC: Reinhard Max <max@suse.de> Signed-off-by: Alexander Graf <agraf@suse.de> [AF: Rebased onto new Makefile infrastructure, twice] [AF: Updated for aarch64 for v2.0.0-rc1] [AF: Rebased onto Makefile changes for v2.1.0-rc0] Signed-off-by: Andreas Färber <afaerber@suse.de> --- Makefile.target | 13 +++++++++++++ linux-user/Makefile.objs | 2 ++ linux-user/binfmt.c | 42 ++++++++++++++++++++++++++++++++++++++++++ scripts/qemu-binfmt-conf.sh | 36 ++++++++++++++++++------------------ 4 files changed, 75 insertions(+), 18 deletions(-) create mode 100644 linux-user/binfmt.c diff --git a/Makefile.target b/Makefile.target index 2262d89..efbd850 100644 --- a/Makefile.target +++ b/Makefile.target @@ -34,6 +34,10 @@ endif PROGS=$(QEMU_PROG) $(QEMU_PROGW) STPFILES= +ifdef CONFIG_LINUX_USER +PROGS+=$(QEMU_PROG)-binfmt +endif + config-target.h: config-target.h-timestamp config-target.h-timestamp: config-target.mak @@ -108,6 +112,8 @@ QEMU_CFLAGS+=-I$(SRC_PATH)/linux-user/$(TARGET_ABI_DIR) -I$(SRC_PATH)/linux-user obj-y += linux-user/ obj-y += gdbstub.o thunk.o user-exec.o +obj-binfmt-y += linux-user/ + endif #CONFIG_LINUX_USER ######################################################### @@ -156,7 +162,11 @@ endif # CONFIG_SOFTMMU # Workaround for http://gcc.gnu.org/PR55489, see configure. %/translate.o: QEMU_CFLAGS += $(TRANSLATE_OPT_CFLAGS) +ifdef CONFIG_LINUX_USER +dummy := $(call unnest-vars,,obj-y obj-binfmt-y) +else dummy := $(call unnest-vars,,obj-y) +endif all-obj-y := $(obj-y) target-obj-y := @@ -181,6 +191,9 @@ $(QEMU_PROG_BUILD): config-devices.mak $(QEMU_PROG_BUILD): $(all-obj-y) ../libqemuutil.a ../libqemustub.a $(call LINK, $(filter-out %.mak, $^)) +$(QEMU_PROG)-binfmt: $(obj-binfmt-y) + $(call LINK,$^) + gdbstub-xml.c: $(TARGET_XML_FILES) $(SRC_PATH)/scripts/feature_to_c.sh $(call quiet-command,rm -f $@ && $(SHELL) $(SRC_PATH)/scripts/feature_to_c.sh $@ $(TARGET_XML_FILES)," GEN $(TARGET_DIR)$@") diff --git a/linux-user/Makefile.objs b/linux-user/Makefile.objs index fd50217..446aca7 100644 --- a/linux-user/Makefile.objs +++ b/linux-user/Makefile.objs @@ -5,3 +5,5 @@ obj-$(TARGET_HAS_BFLT) += flatload.o obj-$(TARGET_I386) += vm86.o obj-$(TARGET_ARM) += arm/nwfpe/ obj-$(TARGET_M68K) += m68k-sim.o + +obj-binfmt-y = binfmt.o diff --git a/linux-user/binfmt.c b/linux-user/binfmt.c new file mode 100644 index 0000000..cd1f513 --- /dev/null +++ b/linux-user/binfmt.c @@ -0,0 +1,42 @@ +#include <stdio.h> +#include <stdarg.h> +#include <unistd.h> +#include <libgen.h> +#include <string.h> +#include <stdlib.h> + + +int main(int argc, char **argv, char **envp) +{ + char *binfmt; + char **new_argv; + + /* + * Check if our file name ends with -binfmt + */ + binfmt = argv[0] + strlen(argv[0]) - strlen("-binfmt"); + if (strcmp(binfmt, "-binfmt")) { + fprintf(stderr, "%s: Invalid executable name\n", argv[0]); + exit(1); + } + if (argc < 3) { + fprintf(stderr, "%s: Please use me through binfmt with P flag\n", + argv[0]); + exit(1); + } + + binfmt[0] = '\0'; + /* Now argv[0] is the real qemu binary name */ + + new_argv = (char **)malloc((argc + 2) * sizeof(*new_argv)); + if (argc > 3) { + memcpy(&new_argv[4], &argv[3], (argc - 3) * sizeof(*new_argv)); + } + new_argv[0] = argv[0]; + new_argv[1] = (char *)"-0"; + new_argv[2] = argv[2]; + new_argv[3] = argv[1]; + new_argv[argc + 1] = NULL; + + return execve(new_argv[0], new_argv, envp); +} diff --git a/scripts/qemu-binfmt-conf.sh b/scripts/qemu-binfmt-conf.sh index 75e0526..557dd2c 100644 --- a/scripts/qemu-binfmt-conf.sh +++ b/scripts/qemu-binfmt-conf.sh @@ -34,42 +34,42 @@ esac # register the interpreter for each cpu except for the native one if [ $cpu != "i386" ] ; then - echo ':i386:M::\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x03\x00:\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/bin/qemu-i386:' > /proc/sys/fs/binfmt_misc/register - echo ':i486:M::\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x06\x00:\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/bin/qemu-i386:' > /proc/sys/fs/binfmt_misc/register + echo ':i386:M::\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x03\x00:\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/bin/qemu-i386-binfmt:P' > /proc/sys/fs/binfmt_misc/register + echo ':i486:M::\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x06\x00:\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/bin/qemu-i386-binfmt:P' > /proc/sys/fs/binfmt_misc/register fi if [ $cpu != "alpha" ] ; then - echo ':alpha:M::\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x26\x90:\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/bin/qemu-alpha:' > /proc/sys/fs/binfmt_misc/register + echo ':alpha:M::\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x26\x90:\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/bin/qemu-alpha-binfmt:P' > /proc/sys/fs/binfmt_misc/register fi if [ $cpu != "arm" ] ; then - echo ':arm:M::\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x28\x00:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/bin/qemu-arm:' > /proc/sys/fs/binfmt_misc/register - echo ':armeb:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x28:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/bin/qemu-armeb:' > /proc/sys/fs/binfmt_misc/register + echo ':arm:M::\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x28\x00:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/bin/qemu-arm-binfmt:P' > /proc/sys/fs/binfmt_misc/register + echo ':armeb:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x28:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/bin/qemu-armeb-binfmt:P' > /proc/sys/fs/binfmt_misc/register fi if [ $cpu != "aarch64" ] ; then - echo ':aarch64:M::\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xb7\x00:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/bin/qemu-aarch64:' > /proc/sys/fs/binfmt_misc/register + echo ':aarch64:M::\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xb7\x00:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/bin/qemu-aarch64-binfmt:P' > /proc/sys/fs/binfmt_misc/register fi if [ $cpu != "sparc" ] ; then - echo ':sparc:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x02:\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/bin/qemu-sparc:' > /proc/sys/fs/binfmt_misc/register + echo ':sparc:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x02:\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/bin/qemu-sparc-binfmt:P' > /proc/sys/fs/binfmt_misc/register fi if [ $cpu != "ppc" ] ; then - echo ':ppc:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x14:\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/bin/qemu-ppc:' > /proc/sys/fs/binfmt_misc/register + echo ':ppc:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x14:\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/bin/qemu-ppc-binfmt:P' > /proc/sys/fs/binfmt_misc/register fi if [ $cpu != "m68k" ] ; then echo 'Please check cpu value and header information for m68k!' - echo ':m68k:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x04:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/bin/qemu-m68k:' > /proc/sys/fs/binfmt_misc/register + echo ':m68k:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x04:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/bin/qemu-m68k-binfmt:P' > /proc/sys/fs/binfmt_misc/register fi if [ $cpu != "mips" ] ; then # FIXME: We could use the other endianness on a MIPS host. - echo ':mips:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/bin/qemu-mips:' > /proc/sys/fs/binfmt_misc/register - echo ':mipsel:M::\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/bin/qemu-mipsel:' > /proc/sys/fs/binfmt_misc/register - echo ':mipsn32:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/bin/qemu-mipsn32:' > /proc/sys/fs/binfmt_misc/register - echo ':mipsn32el:M::\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/bin/qemu-mipsn32el:' > /proc/sys/fs/binfmt_misc/register - echo ':mips64:M::\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/bin/qemu-mips64:' > /proc/sys/fs/binfmt_misc/register - echo ':mips64el:M::\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/bin/qemu-mips64el:' > /proc/sys/fs/binfmt_misc/register + echo ':mips:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/bin/qemu-mips-binfmt:P' > /proc/sys/fs/binfmt_misc/register + echo ':mipsel:M::\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/bin/qemu-mipsel-binfmt:P' > /proc/sys/fs/binfmt_misc/register + echo ':mipsn32:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/bin/qemu-mipsn32-binfmt:P' > /proc/sys/fs/binfmt_misc/register + echo ':mipsn32el:M::\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/bin/qemu-mipsn32el-binfmt:P' > /proc/sys/fs/binfmt_misc/register + echo ':mips64:M::\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/bin/qemu-mips64-binfmt:P' > /proc/sys/fs/binfmt_misc/register + echo ':mips64el:M::\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/bin/qemu-mips64el-binfmt:P' > /proc/sys/fs/binfmt_misc/register fi if [ $cpu != "sh" ] ; then - echo ':sh4:M::\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x2a\x00:\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/bin/qemu-sh4:' > /proc/sys/fs/binfmt_misc/register - echo ':sh4eb:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x2a:\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/bin/qemu-sh4eb:' > /proc/sys/fs/binfmt_misc/register + echo ':sh4:M::\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x2a\x00:\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/bin/qemu-sh4-binfmt:P' > /proc/sys/fs/binfmt_misc/register + echo ':sh4eb:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x2a:\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/bin/qemu-sh4eb-binfmt:P' > /proc/sys/fs/binfmt_misc/register fi if [ $cpu != "s390x" ] ; then - echo ':s390x:M::\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x16:\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/bin/qemu-s390x:' > /proc/sys/fs/binfmt_misc/register + echo ':s390x:M::\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x16:\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/bin/qemu-s390x-binfmt:P' > /proc/sys/fs/binfmt_misc/register fi
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