diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/powerpc/clone.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/powerpc/clone.S | 48 |
1 files changed, 30 insertions, 18 deletions
diff --git a/sysdeps/unix/sysv/linux/powerpc/clone.S b/sysdeps/unix/sysv/linux/powerpc/clone.S index 0afd0717f4..d255abfe0f 100644 --- a/sysdeps/unix/sysv/linux/powerpc/clone.S +++ b/sysdeps/unix/sysv/linux/powerpc/clone.S @@ -27,22 +27,30 @@ /* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg); */ -ENTRY(clone) +ENTRY(__clone) /* Set up stack frame, save registers. */ - stwu 1,-20(1) + stwu 1,-32(1) stw 31,16(1) + stw 30,20(1) - /* Check for child_stack == NULL, fn == NULL. */ - mr. 31,4 + /* Check for child_stack == NULL || fn == NULL. */ + cmpwi 0,4,0 cmpwi 1,3,0 cror 2+0*4,2+0*4,2+1*4 beq- 0,badargs - /* Save 'fn' and its argument on the new stack. */ - stw 3,0(4) - stw 6,4(4) + /* Set up stack frame for child. */ + addi 4,4,-16 + clrrwi 4,4,4 + li 0,0 + stw 0,0(4) - /* 'flags' argument is (only) parameter to clone syscall. */ + /* Save new stack, fn, args across syscall. */ + mr 30,3 /* Function in r30. */ + mr 31,6 /* Arguments in r31. */ + + /* 'flags' argument is first parameter to clone syscall. (The other + argument is the stack pointer, already in r4.) */ mr 3,5 /* Do the call. */ @@ -51,22 +59,22 @@ ENTRY(clone) beq child /* Parent. Restore registers & return. */ - lwz 31,20(1) - addi 1,1,20 + lwz 31,16(1) + lwz 30,20(1) + addi 1,1,32 blr child: - /* Get address of procedure to call. */ - lwz 0,0(31) - /* Set up argument register. */ - lwz 3,4(31) - mtlr 0 - /* Switch to new stack. */ - mr 1,31 /* Call procedure. */ + mtlr 30 + mr 3,31 blrl /* Call _exit with result from procedure. */ - DO_CALL (SYS_ify (exit)) +#ifdef PIC + b _exit@plt +#else + b _exit +#endif badargs: li 3,-EINVAL @@ -76,3 +84,7 @@ error: #else b __syscall_error #endif + +PSEUDO_END (__clone) + +weak_alias (__clone, clone) |