source: trunk/libs/newlib/src/libgloss/m68k/fido-hosted.S @ 495

Last change on this file since 495 was 444, checked in by satin@…, 7 years ago

add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc

File size: 1.1 KB
Line 
1/*
2 * fido-hosted.S --
3 *
4 * Copyright (c) 2006 CodeSourcery Inc
5 *
6 * The authors hereby grant permission to use, copy, modify, distribute,
7 * and license this software and its documentation for any purpose, provided
8 * that existing copyright notices are retained in all copies and that this
9 * notice is included verbatim in any distributions. No written agreement,
10 * license, or royalty fee is required for any of the authorized uses.
11 * Modifications to this software may be copyrighted by their authors
12 * and need not follow the licensing terms described here, provided that
13 * the new terms are clearly indicated on the first page of each file where
14 * they apply.
15 */
16
17/* Semihosting function.  The debugger intercepts the halt, and
18   determines that it is followed by the sentinel pattern. */
19
20        .globl __hosted
21__hosted:
22        linkw %fp,#0
23        movel %fp@(8),%d0
24        movel %fp@(12),%d1
25        .align 4
26        nop
27        bkpt #0
28       
29        /* This sentinel instruction value must be immediately after
30           the bkpt instruction.  The debugger will adjust the pc, so
31           that it is never executed.  This instruction is
32           'movec %sp,0'.  */
33        .long 0x4e7bf000
34        unlk %fp
35        rts
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