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2000-04-13 Andreas Jaeger <aj@suse.de>

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* sysdeps/unix/sysv/linux/mips/clone.S: Fix functions.
This commit is contained in:
Andreas Jaeger 2000-04-13 20:13:29 +00:00
parent 985286e05b
commit d152663e8a
1 changed files with 16 additions and 28 deletions
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44
sysdeps/unix/sysv/linux/mips/clone.S
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@ -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