diff options
Diffstat (limited to 'arch/arm/kernel/entry-common.S')
| -rw-r--r-- | arch/arm/kernel/entry-common.S | 35 |
1 files changed, 21 insertions, 14 deletions
diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S index e2b42997ad3..34826bcceb7 100644 --- a/arch/arm/kernel/entry-common.S +++ b/arch/arm/kernel/entry-common.S @@ -98,20 +98,14 @@ ENTRY(ret_from_fork) run on an ARM7 and we can save a couple of instructions. --pb */ #ifdef CONFIG_CPU_ARM710 - .macro arm710_bug_check, instr, temp - and \temp, \instr, #0x0f000000 @ check for SWI - teq \temp, #0x0f000000 - bne .Larm700bug - .endm - -.Larm700bug: +#define A710(code...) code +.Larm710bug: ldmia sp, {r0 - lr}^ @ Get calling r0 - lr mov r0, r0 add sp, sp, #S_FRAME_SIZE subs pc, lr, #4 #else - .macro arm710_bug_check, instr, temp - .endm +#define A710(code...) #endif .align 5 @@ -129,14 +123,24 @@ ENTRY(vector_swi) /* * Get the system call number. */ -#ifdef CONFIG_ARM_THUMB +#if defined(CONFIG_AEABI) + + @ syscall number is in scno (r7) already. + + A710( ldr ip, [lr, #-4] @ get SWI instruction ) + A710( and ip, ip, #0x0f000000 @ check for SWI ) + A710( teq ip, #0x0f000000 ) + A710( bne .Larm710bug ) +#elif defined(CONFIG_ARM_THUMB) tst r8, #PSR_T_BIT @ this is SPSR from save_user_regs addne scno, r7, #__NR_SYSCALL_BASE @ put OS number in ldreq scno, [lr, #-4] #else ldr scno, [lr, #-4] @ get SWI instruction + A710( and ip, scno, #0x0f000000 @ check for SWI ) + A710( teq ip, #0x0f000000 ) + A710( bne .Larm710bug ) #endif - arm710_bug_check scno, ip #ifdef CONFIG_ALIGNMENT_TRAP ldr ip, __cr_alignment @@ -145,18 +149,19 @@ ENTRY(vector_swi) #endif enable_irq - stmdb sp!, {r4, r5} @ push fifth and sixth args - get_thread_info tsk ldr ip, [tsk, #TI_FLAGS] @ check for syscall tracing +#ifndef CONFIG_AEABI bic scno, scno, #0xff000000 @ mask off SWI op-code eor scno, scno, #__NR_SYSCALL_BASE @ check OS number +#endif adr tbl, sys_call_table @ load syscall table pointer + stmdb sp!, {r4, r5} @ push fifth and sixth args tst ip, #_TIF_SYSCALL_TRACE @ are we tracing syscalls? bne __sys_trace - adr lr, ret_fast_syscall @ return address cmp scno, #NR_syscalls @ check upper syscall limit + adr lr, ret_fast_syscall @ return address ldrcc pc, [tbl, scno, lsl #2] @ call sys_* routine add r1, sp, #S_OFF @@ -207,6 +212,7 @@ ENTRY(sys_call_table) @ r8 = syscall table .type sys_syscall, #function sys_syscall: +#ifndef CONFIG_AEABI eor scno, r0, #__NR_SYSCALL_BASE cmp scno, #__NR_syscall - __NR_SYSCALL_BASE cmpne scno, #NR_syscalls @ check range @@ -216,6 +222,7 @@ sys_syscall: movlo r2, r3 movlo r3, r4 ldrlo pc, [tbl, scno, lsl #2] +#endif b sys_ni_syscall sys_fork_wrapper: |