diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/alpha/clone.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/alpha/clone.S | 54 |
1 files changed, 9 insertions, 45 deletions
diff --git a/sysdeps/unix/sysv/linux/alpha/clone.S b/sysdeps/unix/sysv/linux/alpha/clone.S index 03ecddc727..261bd81e57 100644 --- a/sysdeps/unix/sysv/linux/alpha/clone.S +++ b/sysdeps/unix/sysv/linux/alpha/clone.S @@ -1,4 +1,4 @@ -/* Copyright (C) 1996 Free Software Foundation, Inc. +/* Copyright (C) 1996, 1997 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Richard Henderson <rth@tamu.edu>, 1996. @@ -24,15 +24,11 @@ #define _ERRNO_H 1 #include <errnos.h> -/* int clone(int (*fn)(), void *child_stack, int flags, int nargs, ...) */ +/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg) */ .text ENTRY(__clone) - lda sp,-16(sp) - .frame sp,16,$26,0 - /* Save rest of argument registers for varargs-type work. */ - stq a4,0(sp) - stq a5,8(sp) + .frame sp,0,ra,0 #ifdef PROF .set noat lda AT, _mcount @@ -42,24 +38,13 @@ ENTRY(__clone) .prologue 1 /* Sanity check arguments. */ - sextl a3,a3 ldiq v0,EINVAL beq a0,$error /* no NULL function pointers */ beq a1,$error /* no NULL stack pointers */ - blt a3,$error /* no negative argument counts */ - - /* Allocate space on the new stack and copy args over */ - mov a3,t0 /* save nargs for thread_start */ - s8addq a3,sp,t1 -1: ldq t2,-8(t1) - subq t1,8,t1 - stq t2,-8(a1) - subq a3,1,a3 - subq a1,8,a1 - bne a3,1b /* Do the system call */ mov a0,pv /* get fn ptr out of the way */ + mov a3,a4 /* get fn arg out of the way */ mov a2,a0 ldiq v0,__NR_clone call_pal PAL_callsys @@ -68,23 +53,19 @@ ENTRY(__clone) beq v0,thread_start /* Successful return from the parent */ - lda sp,16(sp) ret /* Something bad happened -- no child created */ $error: br gp,1f 1: ldgp gp,0(gp) - lda sp,16(sp) jmp zero,__syscall_error END(__clone) /* Load up the arguments to the function. Put this block of code in its own function so that we can terminate the stack trace with our - debug info. - - At this point we have $t0=nargs, $pv=fn, $sp=&arg[0]. */ + debug info. */ .ent thread_start thread_start: @@ -92,28 +73,8 @@ thread_start: mov zero,fp .prologue 0 - /* Calculate address of jump into argument loading code */ - cmple t0,6,t2 /* no more than 6 args in registers */ - cmoveq t2,6,t0 - br v0,1f /* find address of arg0 */ -1: lda v0,$arg0-1b(v0) - s4addq t0,zero,t1 - subq v0,t1,v0 - jmp (v0) - - /* Load the integer register arguments */ - ldq a5,40(sp) - ldq a4,32(sp) - ldq a3,24(sp) - ldq a2,16(sp) - ldq a1,8(sp) - ldq a0,0(sp) -$arg0: - - /* Adjust stack to remove the arguments we just loaded */ - s8addq t0,sp,sp - /* Call the user's function */ + mov a4,a0 jsr ra,(pv) ldgp gp,0(ra) @@ -121,6 +82,9 @@ $arg0: mov v0,a0 jsr ra,_exit + /* Die horribly. */ + halt + .end thread_start weak_alias(__clone, clone) |