diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/mips/clone.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/mips/clone.S | 60 |
1 files changed, 56 insertions, 4 deletions
diff --git a/sysdeps/unix/sysv/linux/mips/clone.S b/sysdeps/unix/sysv/linux/mips/clone.S index 043f5921cb..8b8e0072f5 100644 --- a/sysdeps/unix/sysv/linux/mips/clone.S +++ b/sysdeps/unix/sysv/linux/mips/clone.S @@ -1,4 +1,4 @@ -/* Copyright (C) 1996, 1997, 2000, 2003 Free Software Foundation, Inc. +/* Copyright (C) 1996, 1997, 2000, 2003, 2005 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ralf Baechle <ralf@linux-mips.org>, 1996. @@ -24,11 +24,23 @@ #include <sysdep.h> #define _ERRNO_H 1 #include <bits/errno.h> +#ifdef RESET_PID +#include <tls.h> +#endif + +#define CLONE_VM 0x00000100 +#define CLONE_THREAD 0x00010000 -/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg) */ +/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg, + void *parent_tidptr, void *tls, void *child_tidptr) */ .text -LOCALSZ= 1 +#if _MIPS_SIM == _ABIO32 +# define EXTRA_LOCALS 1 +#else +# define EXTRA_LOCALS 0 +#endif +LOCALSZ= 4 FRAMESZ= (((NARGSAVE+LOCALSZ)*SZREG)+ALSZ)&ALMASK GPOFF= FRAMESZ-(1*SZREG) NESTED(__clone,4*SZREG,sp) @@ -56,10 +68,26 @@ NESTED(__clone,4*SZREG,sp) PTR_SUBU a1,32 /* Reserve argument save space. */ PTR_S a0,0(a1) /* Save function pointer. */ PTR_S a3,PTRSIZE(a1) /* Save argument pointer. */ +#ifdef RESET_PID + LONG_S a2,(PTRSIZE*2)(a1) /* Save clone flags. */ +#endif + move a0,a2 + + /* Shuffle in the last three arguments - arguments 5, 6, and 7 to + this function, but arguments 3, 4, and 5 to the syscall. */ +#if _MIPS_SIM == _ABIO32 + PTR_L a2,(FRAMESZ+PTRSIZE+PTRSIZE+16)(sp) + PTR_S a2,16(sp) + PTR_L a2,(FRAMESZ+16)(sp) + PTR_L a3,(FRAMESZ+PTRSIZE+16)(sp) +#else + move a2,a4 + move a3,a5 + move a4,a6 +#endif /* Do the system call */ - move a0,a2 li v0,__NR_clone syscall @@ -94,6 +122,15 @@ L(thread_start): /* cp is already loaded. */ SAVE_GP (GPOFF) /* The stackframe has been created on entry of clone(). */ + +#ifdef RESET_PID + /* Check and see if we need to reset the PID. */ + LONG_L a0,(PTRSIZE*2)(sp) + and a1,a0,CLONE_THREAD + beqz a1,L(restore_pid) +L(donepid): +#endif + /* Restore the arg for user's function. */ PTR_L t9,0(sp) /* Function pointer. */ PTR_L a0,PTRSIZE(sp) /* Argument pointer. */ @@ -109,6 +146,21 @@ L(thread_start): #else jal _exit #endif + +#ifdef RESET_PID +L(restore_pid): + and a1,a0,CLONE_VM + li v0,-1 + bnez a1,L(gotpid) + li v0,__NR_getpid + syscall +L(gotpid): + READ_THREAD_POINTER(v1) + INT_S v0,PID_OFFSET(v1) + INT_S v0,TID_OFFSET(v1) + b L(donepid) +#endif + END(__thread_start) weak_alias(__clone, clone) |