1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
|
/*
* bdm-semihost.S --
*
* Copyright (c) 2006 CodeSourcery Inc
*
* The authors hereby grant permission to use, copy, modify, distribute,
* and license this software and its documentation for any purpose, provided
* that existing copyright notices are retained in all copies and that this
* notice is included verbatim in any distributions. No written agreement,
* license, or royalty fee is required for any of the authorized uses.
* Modifications to this software may be copyrighted by their authors
* and need not follow the licensing terms described here, provided that
* the new terms are clearly indicated on the first page of each file where
* they apply.
*/
/* Semihosting function. The debugger intercepts the halt, and
determines that it is followed by the sentinel pattern. */
.globl __bdm_semihost
__bdm_semihost:
linkw %fp,#0
movel %fp@(8),%d0
movel %fp@(12),%d1
.align 4
/* The halt sequence must be 'nop; halt' and aligned to a 4 byte
boundary. */
nop
halt
/* This sentinel instruction value must be immediately after
the halt instruction. The debugger will adjust the pc, so
that it is never executed. This instruction is
'movec %sp,0'. */
.long 0x4e7bf000
unlk %fp
rts
|
