22d366cc09
Add __bionic_clone function for x86, which will be used for clone system call. Change-Id: I889dc9bf4b7ebb4358476e17e6f3233e26491f4d Signed-off-by: Jin Wei <wei.a.jin@intel.com> Signed-off-by: Xiaokang Qin <xiaokang.qin@intel.com> Signed-off-by: Beare, Bruce J <bruce.j.beare@intel.com> Signed-off-by: Jack Ren <jack.ren@intel.com> Author-tracking-BZ: 51414
112 lines
2.6 KiB
ArmAsm
112 lines
2.6 KiB
ArmAsm
#include <sys/linux-syscalls.h>
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.text
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/*
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* int __pthread_clone(int (*fn)(void*), void *tls, int flags,
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* void *arg);
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*/
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.globl __pthread_clone
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.type __pthread_clone, @function
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.align 4
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__pthread_clone:
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pushl %ebx
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pushl %ecx
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movl 16(%esp), %ecx
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# save tls
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movl %ecx, %ebx
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# 16-byte alignment on child stack
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andl $~15, %ecx
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# insert arguments onto the child stack
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movl 12(%esp), %eax
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movl %eax, -16(%ecx)
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movl 24(%esp), %eax
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movl %eax, -12(%ecx)
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movl %ebx, -8(%ecx)
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subl $16, %ecx
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movl 20(%esp), %ebx
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movl $__NR_clone, %eax
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int $0x80
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test %eax, %eax
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jns 1f
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# an error occurred, set errno and return -1
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negl %eax
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call __set_errno
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orl $-1, %eax
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jmp 2f
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1:
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jnz 2f
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# we're in the child thread now, call __thread_entry
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# with the appropriate arguments on the child stack
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# we already placed most of them
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call __thread_entry
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hlt
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2:
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popl %ecx
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popl %ebx
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ret
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/*
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* int __bionic_clone(unsigned long clone_flags,
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* void* newsp,
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* int *parent_tidptr,
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* void *new_tls,
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* int *child_tidptr,
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* int (*fn)(void *),
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* void *arg);
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*/
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.text
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.globl __bionic_clone
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.type __bionic_clone, @function
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.align 4
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__bionic_clone:
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pushl %ebx
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pushl %esi
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pushl %edi
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# insert arguments onto the child stack
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movl 20(%esp), %ecx
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andl $~15, %ecx
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movl 36(%esp), %eax
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movl %eax, -16(%ecx)
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movl 40(%esp), %eax
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movl %eax, -12(%ecx)
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subl $16, %ecx
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movl 16(%esp), %ebx
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movl 24(%esp), %edx
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movl 32(%esp), %esi
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movl 28(%esp), %edi
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movl $__NR_clone, %eax
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int $0x80
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test %eax, %eax
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jns 1f
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# an error occurred, set errno and return -1
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negl %eax
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call __set_errno
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orl $-1, %eax
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jmp 2f
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1:
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jnz 2f
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# we're in the child now, call __bionic_clone_entry
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# with the appropriate arguments on the child stack
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# we already placed most of them
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call __bionic_clone_entry
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hlt
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2:
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popl %edi
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popl %esi
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popl %ebx
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ret
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