diff options
| author | Jakub Jelinek <jakub@redhat.com> | 2004-12-07 14:01:11 +0000 |
|---|---|---|
| committer | Jakub Jelinek <jakub@redhat.com> | 2004-12-07 14:01:11 +0000 |
| commit | 37756a838922d080448793aa5ab5e90c5aba78c1 (patch) | |
| tree | 043efc2dbba1e4c350c65704af85bd5a628ea561 /sysdeps/unix/sysv/linux/x86_64 | |
| parent | 3b1744f208165b87fb8cd286d39b395c56257ee5 (diff) | |
Updated to fedora-glibc-20041207T1331
Diffstat (limited to 'sysdeps/unix/sysv/linux/x86_64')
| -rw-r--r-- | sysdeps/unix/sysv/linux/x86_64/clone.S | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/sysdeps/unix/sysv/linux/x86_64/clone.S b/sysdeps/unix/sysv/linux/x86_64/clone.S index d182fe2f9e..9695e1eaf8 100644 --- a/sysdeps/unix/sysv/linux/x86_64/clone.S +++ b/sysdeps/unix/sysv/linux/x86_64/clone.S @@ -26,6 +26,9 @@ #include <bp-sym.h> #include <bp-asm.h> +#define CLONE_VM 0x00000100 +#define CLONE_THREAD 0x00010000 + /* The userland implementation is: int clone (int (*fn)(void *arg), void *child_stack, int flags, void *arg), the kernel entry is: @@ -80,16 +83,29 @@ ENTRY (BP_SYM (__clone)) testq %rax,%rax jl SYSCALL_ERROR_LABEL - jz thread_start + jz L(thread_start) L(pseudo_end): ret -thread_start: +L(thread_start): /* Clear the frame pointer. The ABI suggests this be done, to mark the outermost frame obviously. */ xorq %rbp, %rbp +#ifdef RESET_PID + testq $CLONE_THREAD, %rdi + jne 1f + testq $CLONE_VM, %rdi + movl $-1, %eax + jne 2f + movq $SYS_ify(getpid), %rax + syscall +2: movl %eax, %fs:PID + movl %eax, %fs:TID +1: +#endif + /* Set up arguments for the function call. */ popq %rax /* Function to call. */ popq %rdi /* Argument. */ |