diff options
Diffstat (limited to 'libc/sysdeps/linux/sh/clone.S')
-rw-r--r-- | libc/sysdeps/linux/sh/clone.S | 88 |
1 files changed, 33 insertions, 55 deletions
diff --git a/libc/sysdeps/linux/sh/clone.S b/libc/sysdeps/linux/sh/clone.S index f2ce8321b..98086ef09 100644 --- a/libc/sysdeps/linux/sh/clone.S +++ b/libc/sysdeps/linux/sh/clone.S @@ -35,7 +35,6 @@ /* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg); */ .text -.extern __syscall_error .text .align 4 @@ -44,71 +43,50 @@ __clone: /* sanity check arguments. */ tst r4, r4 + bt 0f + tst r5, r5 bf/s 1f - tst r5, r5 - bf/s 1f - mov.l .L1, r1 -#ifdef __HAVE_SHARED__ - mov.l r12, @-r15 - sts.l pr, @-r15 - mov.l .LG, r12 - mova .LG, r0 - add r0, r12 - mova .L1, r0 - add r0, r1 - jsr @r1 + mov #+__NR_clone, r3 +0: + bra __syscall_error mov #-EINVAL, r4 - lds.l @r15+, pr - rts - mov.l @r15+, r12 -#else - jmp @r1 - mov #-EINVAL, r4 -#endif - .align 2 -.L1: - .long PLTJMP(__syscall_error) + 1: /* insert the args onto the new stack */ mov.l r7, @-r5 /* save the function pointer as the 0th element */ mov.l r4, @-r5 - + /* do the system call */ mov r6, r4 - mov #+__NR_clone, r3 trapa #0x12 mov r0, r1 +#ifdef __sh2__ +// 12 arithmetic shifts for the crappy sh2, because shad doesn't exist! + shar r1 + shar r1 + shar r1 + shar r1 + shar r1 + shar r1 + shar r1 + shar r1 + shar r1 + shar r1 + shar r1 + shar r1 +#else mov #-12, r2 shad r2, r1 +#endif not r1, r1 // r1=0 means r0 = -1 to -4095 tst r1, r1 // i.e. error in linux - bf 2f - mov.l .L2, r1 -#ifdef __HAVE_SHARED__ - mov r0, r4 - mov.l r12, @-r15 - sts.l pr, @-r15 - mov.l .LG, r12 - mova .LG, r0 - add r0, r12 - mova .L2, r0 - add r0, r1 - jsr @r1 - nop - lds.l @r15+, pr - rts - mov.l @r15+, r12 -#else - jmp @r1 + bf/s 2f + tst r0, r0 + bra __syscall_error mov r0, r4 -#endif - .align 2 -.L2: - .long PLTJMP(__syscall_error) 2: - tst r0, r0 bt 3f rts nop @@ -119,15 +97,15 @@ __clone: mov.l @(4,r15), r4 /* we are done, passing the return value through r0 */ - mov.l .L3, r1 -#ifdef __HAVE_SHARED__ + mov.l .L1, r1 +#if defined __HAVE_ELF__ && defined __HAVE_SHARED__ mov.l r12, @-r15 sts.l pr, @-r15 mov r0, r4 - mova .LG, r0 + mova .LG, r0 /* .LG from syscall_error.S */ mov.l .LG, r12 add r0, r12 - mova .L3, r0 + mova .L1, r0 add r0, r1 jsr @r1 nop @@ -139,11 +117,11 @@ __clone: mov r0, r4 #endif .align 2 -.LG: - .long _GLOBAL_OFFSET_TABLE_ -.L3: +.L1: .long PLTJMP(_exit) .size __clone,.-__clone; .globl clone; clone = __clone + +#include "syscall_error.S" |