Libc-997.1.1.tar.gz

[apple/libc.git] / i386 / string / strncpy.s

diff --git a/i386/string/strncpy.s b/i386/string/strncpy.s
index 69edfd9a1bf71327dbc03b06b942c1f5f1abeafc..9b1799db66130c9a7178974cfcf8534f3c7be5db 100644 (file)
--- a/i386/string/strncpy.s
+++ b/i386/string/strncpy.s
@@ -177,10 +177,15 @@ LFound0:
 //     %ecx = buffer length remaining
 
 LZeroBuffer:
 //     %ecx = buffer length remaining
 
 LZeroBuffer:

-       pushl   %ecx                    // remaining buffer size
-       pushl   %edi                    // ptr to 1st unstored byte
+//     The stack currently is aligned to 4 mod 16 (it was 0 mod 16 at the time of
+//     the call, and the return address, edi, and esi have been pushed).  It needs
+//     to aligned 0 mod 16 when we call bzero, so we subtract 20 from esp (not 4
+//     because we need to have 8 bytes for the arguments to bzero).
+       subl    $20,%esp
+       movl    %ecx,4(%esp)    // remaining buffer size
+       movl    %edi, (%esp)    // pointer to first unstored byte

        call    _bzero
        call    _bzero

-       addl    $8,%esp                 // pop off the arguments
+       addl    $20,%esp

 
 LDone:
        movl    12(%esp),%eax           // original dest ptr is return value
 
 LDone:
        movl    12(%esp),%eax           // original dest ptr is return value