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authorSven Schnelle <svens@linux.ibm.com>2021-06-25 15:50:08 +0300
committerVasily Gorbik <gor@linux.ibm.com>2021-07-08 16:37:28 +0300
commit779df2248739b6308c03b354c99e4c352141e3bc (patch)
tree952ac56aee397e3d16bdecf4e4d9afa866b48978 /arch/s390/include/asm/vdso
parent43e1f76b0b69b86b2175ef755243e61fe40c75db (diff)
downloadlinux-779df2248739b6308c03b354c99e4c352141e3bc.tar.xz
s390/vdso: add minimal compat vdso
Add a small vdso for 31 bit compat application that provides trampolines for calls to sigreturn,rt_sigreturn,syscall_restart. This is requird for moving these syscalls away from the signal frame to the vdso. Note that this patch effectively disables CONFIG_COMPAT when using clang to compile the kernel. clang doesn't support 31 bit mode. We want to redirect sigreturn and restart_syscall to the vdso. However, the kernel cannot parse the ELF vdso file, so we need to generate header files which contain the offsets of the syscall instructions in the vdso page. Signed-off-by: Sven Schnelle <svens@linux.ibm.com> Reviewed-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/vdso')
-rw-r--r--arch/s390/include/asm/vdso/gettimeofday.h1
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/s390/include/asm/vdso/gettimeofday.h b/arch/s390/include/asm/vdso/gettimeofday.h
index 383c53c3dddd..d6465b22ffe3 100644
--- a/arch/s390/include/asm/vdso/gettimeofday.h
+++ b/arch/s390/include/asm/vdso/gettimeofday.h
@@ -8,7 +8,6 @@
#include <asm/timex.h>
#include <asm/unistd.h>
-#include <asm/vdso.h>
#include <linux/compiler.h>
#define vdso_calc_delta __arch_vdso_calc_delta