summaryrefslogtreecommitdiff
path: root/arch/powerpc/kernel/vdso64/datapage.S
diff options
context:
space:
mode:
authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2005-11-16 13:54:32 +1100
committerPaul Mackerras <paulus@samba.org>2005-11-16 14:05:11 +1100
commit5d66da3d71e6aeca80ca08dbebd8a1cd72e6ee1f (patch)
tree1bdc54e617fc209925f33118f414ce0a4ebb62ac /arch/powerpc/kernel/vdso64/datapage.S
parentd3ed65832029dcaf5fe086670a2f2c25600b51e9 (diff)
[PATCH] powerpc: Make the vDSO functions set error code (#2)
The vDSO functions should have the same calling convention as a syscall. Unfortunately, they currently don't set the cr0.so bit which is used to indicate an error. This patch makes them clear this bit unconditionally since all functions currently succeed. The syscall fallback done by some of them will eventually override this if the syscall fails. This also changes the symbol version of all vdso exports to make sure glibc can differenciate between old and fixed calls for existing ones like __kernel_gettimeofday. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/kernel/vdso64/datapage.S')
-rw-r--r--arch/powerpc/kernel/vdso64/datapage.S3
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/vdso64/datapage.S b/arch/powerpc/kernel/vdso64/datapage.S
index 6393e4137bc7..3b2dd7d0c1eb 100644
--- a/arch/powerpc/kernel/vdso64/datapage.S
+++ b/arch/powerpc/kernel/vdso64/datapage.S
@@ -54,12 +54,12 @@ V_FUNCTION_BEGIN(__kernel_get_syscall_map)
.cfi_startproc
mflr r12
.cfi_register lr,r12
-
mr r4,r3
bl V_LOCAL_FUNC(__get_datapage)
mtlr r12
addi r3,r3,CFG_SYSCALL_MAP64
cmpli cr0,r4,0
+ crclr cr0*4+so
beqlr
li r0,__NR_syscalls
stw r0,0(r4)
@@ -80,6 +80,7 @@ V_FUNCTION_BEGIN(__kernel_get_tbfreq)
bl V_LOCAL_FUNC(__get_datapage)
ld r3,CFG_TB_TICKS_PER_SEC(r3)
mtlr r12
+ crclr cr0*4+so
blr
.cfi_endproc
V_FUNCTION_END(__kernel_get_tbfreq)