diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/i386/clone.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/i386/clone.S | 36 |
1 files changed, 34 insertions, 2 deletions
diff --git a/sysdeps/unix/sysv/linux/i386/clone.S b/sysdeps/unix/sysv/linux/i386/clone.S index 94c6a72548..acd43dfb0b 100644 --- a/sysdeps/unix/sysv/linux/i386/clone.S +++ b/sysdeps/unix/sysv/linux/i386/clone.S @@ -1,4 +1,4 @@ -/* Copyright (C) 1996,1997,98,99,2000,02,03 Free Software Foundation, Inc. +/* Copyright (C) 1996,1997,98,99,2000,02,03,04 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Richard Henderson (rth@tamu.edu) @@ -42,6 +42,9 @@ #define __NR_clone 120 #define SYS_clone 120 +#define CLONE_VM 0x00000100 +#define CLONE_THREAD 0x00010000 + .text ENTRY (BP_SYM (__clone)) /* Sanity check arguments. */ @@ -74,7 +77,9 @@ ENTRY (BP_SYM (__clone)) movl %eax,8(%ecx) /* Don't leak any information. */ movl $0,4(%ecx) +#ifndef RESET_PID movl $0,(%ecx) +#endif /* Do the system call */ pushl %ebx @@ -85,6 +90,12 @@ ENTRY (BP_SYM (__clone)) movl FLAGS+12(%esp),%ebx movl CTID+12(%esp),%edi movl $SYS_ify(clone),%eax + +#ifdef RESET_PID + /* Remember the flag value. */ + movl %ebx, (%ecx) +#endif + int $0x80 popl %edi popl %esi @@ -98,7 +109,13 @@ L(pseudo_end): ret L(thread_start): - subl %ebp,%ebp /* terminate the stack frame */ + /* Note: %esi is zero. */ + movl %esi,%ebp /* terminate the stack frame */ +#ifdef RESET_PID + testl $CLONE_THREAD, %edi + je L(newpid) +L(haspid): +#endif call *%ebx #ifdef PIC call L(here) @@ -110,6 +127,21 @@ L(here): movl $SYS_ify(exit), %eax int $0x80 +#ifdef RESET_PID + .subsection 2 +L(newpid): + testl $CLONE_VM, %edi + movl $-1, %eax + jne L(nomoregetpid) + movl $SYS_ify(getpid), %eax + ENTER_KERNEL +L(nomoregetpid): + movl %eax, %gs:PID + movl %eax, %gs:TID + jmp L(haspid) + .previous +#endif + PSEUDO_END (BP_SYM (__clone)) weak_alias (BP_SYM (__clone), BP_SYM (clone)) |