|
Last change
on this file since 474 was
444,
checked in by satin@…, 6 years ago
|
|
add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc
|
|
File size:
1.1 KB
|
| Rev | Line | |
|---|
| [444] | 1 | /* |
|---|
| 2 | * cf-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 | |
|---|
| 26 | /* The semihosting sequence is 'nop; halt;sentinel' aligned to |
|---|
| 27 | a 4 byte boundary. The sentinel is an ill formed instruction |
|---|
| 28 | (movec %sp,0). The debugger will adjust the pc, so it is never |
|---|
| 29 | executed. */ |
|---|
| 30 | .balignw 4,0x4e71 |
|---|
| 31 | nop |
|---|
| 32 | halt |
|---|
| 33 | .long 0x4e7bf000 |
|---|
| 34 | |
|---|
| 35 | unlk %fp |
|---|
| 36 | rts |
|---|
Note: See
TracBrowser
for help on using the repository browser.
