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| author | Thom Johansen <thomj@rockbox.org> | 2005-11-13 23:47:26 +0000 |
|---|---|---|
| committer | Thom Johansen <thomj@rockbox.org> | 2005-11-13 23:47:26 +0000 |
| commit | e3095ee3b8bc84d4d93796869d694455b7911b2f (patch) | |
| tree | a7ff616a419acb4a3b487bf57e0b39d03e4851bc /firmware | |
| parent | e22f9c49c83a211ef8fda6e132c64d84284cfb15 (diff) | |
| download | rockbox-e3095ee3b8bc84d4d93796869d694455b7911b2f.tar.gz rockbox-e3095ee3b8bc84d4d93796869d694455b7911b2f.zip | |
iPod fixes. Stack starts at stackend. Munge stack with 0xdeadbeef.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7851 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'firmware')
| -rw-r--r-- | firmware/crt0.S | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/firmware/crt0.S b/firmware/crt0.S index 9ef597fad6..cba7221471 100644 --- a/firmware/crt0.S +++ b/firmware/crt0.S | |||
| @@ -75,9 +75,16 @@ cop_wake_start: | |||
| 75 | ldr pc, [r0] | 75 | ldr pc, [r0] |
| 76 | 76 | ||
| 77 | 1: | 77 | 1: |
| 78 | /* setup some stack */ | 78 | /* setup some stack and munge it with 0xdeadbeef */ |
| 79 | ldr sp, = _stackbegin | 79 | ldr sp, =_stackend |
| 80 | 80 | mov r3, sp | |
| 81 | ldr r2, =_stackbegin | ||
| 82 | ldr r4, =0xdeadbeef | ||
| 83 | .mungeloop: | ||
| 84 | str r4, [r2], #4 | ||
| 85 | cmp r2, r3 | ||
| 86 | bne .mungeloop | ||
| 87 | |||
| 81 | /* get the high part of our execute address */ | 88 | /* get the high part of our execute address */ |
| 82 | ldr r2, =0xffffff00 | 89 | ldr r2, =0xffffff00 |
| 83 | and r4, pc, r2 | 90 | and r4, pc, r2 |