diff options
Diffstat (limited to 'libc/arch-x86/bionic/crtend_so.S')
| -rw-r--r-- | libc/arch-x86/bionic/crtend_so.S | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/libc/arch-x86/bionic/crtend_so.S b/libc/arch-x86/bionic/crtend_so.S new file mode 100644 index 0000000..7fb2280 --- /dev/null +++ b/libc/arch-x86/bionic/crtend_so.S @@ -0,0 +1,47 @@ +.text +.align 4 +.type __bionic_call_ctors, @function + +/* + * The CTORS_LIST is marked by -1 (start) and 0 (end). + * We mark the end of the .ctors section with the __CTOR_END__ section so + * that we can just iterate backwards from it until we hit -1 and execute + * all the function pointers. This seems to be the way to do it for SVR4 + * derived systems. + */ +__bionic_call_ctors: + pushl %esi + mov $__CTOR_END__, %esi + +0: + /* now grab the next function pointer and check if its -1. If not, + * call it, otherwise we're done. We use %esi since it's callee saved. + */ + subl $4, %esi + mov (%esi), %eax + cmp $0xffffffff, %eax + je 1f + call *%eax + jmp 0b + +1: + /* we're done */ + popl %esi + ret + +.section .init +.align 4 + call __bionic_call_ctors + ret + +.section .ctors, "aw", @progbits +.align 4 +.type __CTOR_END__, @object +__CTOR_END__: + .long 0 + +.section .init_array, "aw" + .long 0 + +.section .fini_array, "aw" + .long 0 |