diff options
Diffstat (limited to 'sysdeps')
| -rw-r--r-- | sysdeps/unix/sysv/linux/mips/clone.S | 44 |
1 files changed, 16 insertions, 28 deletions
diff --git a/sysdeps/unix/sysv/linux/mips/clone.S b/sysdeps/unix/sysv/linux/mips/clone.S index 30499bcf43..1bb5c29d3c 100644 --- a/sysdeps/unix/sysv/linux/mips/clone.S +++ b/sysdeps/unix/sysv/linux/mips/clone.S @@ -26,25 +26,18 @@ #define _ERRNO_H 1 #include <bits/errno.h> -/* int clone(int (*fn)(), void *child_stack, int flags, void *arg) */ - -#define FRAMESZ 8*SZREG -#if _MIPS_SIM == _MIPS_SIM_ABI32 -#define MAX_REG_ARGS 4 -#else -#define MAX_REG_ARGS 6 -#endif +/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg) */ .text -NESTED(__clone,FRAMESZ,sp) +NESTED(__clone,4*SZREG,sp) #ifdef __PIC__ .set noreorder .cpload $25 .set reorder - PTR_SUBIU sp,FRAMESZ - .cprestore SZREG*4 + subu sp,32 + .cprestore 16 #else - PTR_SUBIU sp,FRAMESZ + subu sp,32 #endif #ifdef PROF .set noat @@ -53,17 +46,15 @@ NESTED(__clone,FRAMESZ,sp) .set at #endif - REG_S s0,FRAMESZ-SZREG*2(sp) - REG_S s1,FRAMESZ-SZREG*3(sp) + /* Sanity check arguments. */ li v0,EINVAL - beqz a0,error /* no NULL function pointers */ - beqz a1,error /* no NULL stack pointers */ + beqz a0,error /* No NULL function pointers. */ + beqz a1,error /* No NULL stack pointers. */ - /* Allocate space on the new stack and copy args over */ - /* Save the arg for user's function */ - move s0,a3 /* Save arg __thread_start. */ - move s1,a0 /* Save func. pointer. */ + subu a1,32 /* Reserve argument save space. */ + sw a0,0(a1) /* Save function pointer. */ + sw a3,4(a1) /* Save argument pointer. */ /* Do the system call */ @@ -75,16 +66,12 @@ NESTED(__clone,FRAMESZ,sp) beqz v0,__thread_start /* Successful return from the parent */ - REG_L s0,FRAMESZ-SZREG*2(sp) - REG_L s1,FRAMESZ-SZREG*3(sp) - PTR_ADDIU sp,FRAMESZ + addiu sp,32 ret /* Something bad happened -- no child created */ error: - REG_L s0,FRAMESZ-SZREG*2(sp) - REG_L s1,FRAMESZ-SZREG*3(sp) - PTR_ADDIU sp,FRAMESZ + addiu sp,32 #ifdef PIC la t9,__syscall_error jr t9 @@ -100,10 +87,11 @@ error: At this point we have s0=arg, s1=fn. */ NESTED(__thread_start,FRAMESZ,sp) + /* cp is already loaded. */ /* The stackframe has been created on entry of clone(). */ /* Resort the arg for user's function. */ - move a0,s0 - move t9,s1 + move a0,0(sp) /* Function pointer. */ + move t9,4(sp) /* Argument pointer. */ /* Call the user's function. */ jalr t9 |