arm64: Implement the compat_sys_call_table in C

Unlike the sys_call_table[], the compat one was implemented in sys32.S
making it impossible to notice discrepancies between the number of
compat syscalls and the __NR_compat_syscalls macro, the latter having to
be defined in asm/unistd.h as including asm/unistd32.h would cause
conflicts on __NR_* definitions. With this patch, incorrect
__NR_compat_syscalls values will result in a build-time error.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Suggested-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S
index 02e6af117762..cf21bb3bf752 100644
--- a/arch/arm64/kernel/entry.S
+++ b/arch/arm64/kernel/entry.S
@@ -433,7 +433,7 @@ el0_svc_compat:
         /*
          * AArch32 syscall handling
          */
-        adr     stbl, compat_sys_call_table     // load compat syscall table pointer
+        adrp    stbl, compat_sys_call_table     // load compat syscall table pointer
         uxtw    scno, w7                        // syscall number in w7 (r7)
         mov     sc_nr, #__NR_compat_syscalls
         b       el0_svc_naked