__syscall.s   [plain text]


/*
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/* Copyright (c) 1992 NeXT Computer, Inc.  All rights reserved. */

#include "SYS.h"

#if defined(__i386__)

LEAF(___syscall, 0)
	popl	%ecx		// ret addr
	popl	%eax		// syscall number
	pushl	%ecx
	UNIX_SYSCALL_TRAP
	movl	(%esp),%edx	// add one element to stack so
	pushl	%ecx		// caller "pop" will work
	jnb	2f
	BRANCH_EXTERN(cerror)
2:
END(___syscall)

#elif defined(__x86_64__)

// For x86-64, the kernel slides the argument list for us.
// The number of arguments here is variable, but our macros ignore
// that value anyway.
__SYSCALL(___syscall, syscall, 0);

#else
#error Unsupported architecture
#endif