minix/lib/libc/arch/i386/int64/cvu64.S
Lorenzo Cavallaro a16308efdb cdecl calling convention expects the callee to pop the hidden pointer on
struct return. For example, GCC and LLVM comply with this (tested on IA32).

ACK doesn't seem to follow this convention and expects the caller to clean up
the stack. Compiling hand-written ACK-compliant assembly code (returning a 
struct) with GCC or LLVM used to break things (4-bytes misaligned stack).

The patch fixes this problem.
2010-03-24 17:25:17 +00:00

19 lines
418 B
ArmAsm

/* cvu64() - unsigned converted to 64 bit Author: Kees J. Bot */
/* 7 Dec 1995 */
#include <minix/compiler.h>
.text
.globl _cvu64, _cvul64
_cvu64:
/* u64_t cvu64(unsigned i); */
_cvul64:
/* u64_t cvul64(unsigned long i); */
movl 4(%esp), %eax
movl 8(%esp), %edx
movl %edx, (%eax)
movl $0, 4(%eax)
ret BYTES_TO_POP_ON_STRUCT_RETURN
/* */
/* $PchId: cvu64.ack.s,v 1.2 1996/04/11 18:59:57 philip Exp $ */