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authorPaul Brook <paul@codesourcery.com>2006-05-16 14:25:55 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2006-06-18 16:16:57 +0100
commit5247593c9634309d1b9f7b549495b8e5ad521688 (patch)
treeb9744271e43b76b22a43fd70d09c4b2aa81aa95f /arch/arm
parent254a1564fb6f9242782f9a8e5d59a212424686e8 (diff)
[ARM] 3335/1: Old-abi Thumb sys_syscall broken
Patch from Paul Brook The old-abi sys_syscall syscall is broken when called from Thumb mode. It assumes the syscall number is an Arm syscall number (ie. starts from __NR_OABI_SYSCALL_BASE). In thumb mode syscall numbers start from zero. The patch below fixes this by clearing the nigh bits of the syscall number instead of inverting them. Technically this means we accept some invalid syscall numbers, but I can't see how that could be a problem. The two sets of numbers far apart that unimplemented syscalls should still be rejected. Signed-off-by: Paul Brook <paul@codesourcery.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/kernel/entry-common.S2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S
index dbcb11a31f78..b5bcebca1cd6 100644
--- a/arch/arm/kernel/entry-common.S
+++ b/arch/arm/kernel/entry-common.S
@@ -271,7 +271,7 @@ ENTRY(sys_call_table)
@ r8 = syscall table
.type sys_syscall, #function
sys_syscall:
- eor scno, r0, #__NR_OABI_SYSCALL_BASE
+ bic scno, r0, #__NR_OABI_SYSCALL_BASE
cmp scno, #__NR_syscall - __NR_SYSCALL_BASE
cmpne scno, #NR_syscalls @ check range
stmloia sp, {r5, r6} @ shuffle args