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| author | Thomas Martitz <kugel@rockbox.org> | 2010-03-03 23:20:32 +0000 |
|---|---|---|
| committer | Thomas Martitz <kugel@rockbox.org> | 2010-03-03 23:20:32 +0000 |
| commit | f8edc325896c9c24d7f32f4861a0b0d2a8b9f4cd (patch) | |
| tree | b2682307d01fffb54dd68e54b8f2e2986fe6bcc6 /firmware/target/arm/crt0-pp.S | |
| parent | e479853f1542616dab56817c8f5326364b663c7c (diff) | |
| download | rockbox-f8edc325896c9c24d7f32f4861a0b0d2a8b9f4cd.tar.gz rockbox-f8edc325896c9c24d7f32f4861a0b0d2a8b9f4cd.zip | |
FS#10756 - Free unused init code
Introduce a new .init section for initialisation code, so that it can be copied to an area which is later overwritten before calling. The stack/bss can then overwrite that code, effectively freeing the code size that the initialisation routines need. Gives a few kB ram usage back.
Only implemented for PP and as3525 so far. More targets could be added, as well as more functions.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25013 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'firmware/target/arm/crt0-pp.S')
| -rw-r--r-- | firmware/target/arm/crt0-pp.S | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/firmware/target/arm/crt0-pp.S b/firmware/target/arm/crt0-pp.S index 9c996960cc..4e16df0f7a 100644 --- a/firmware/target/arm/crt0-pp.S +++ b/firmware/target/arm/crt0-pp.S @@ -213,6 +213,19 @@ cpu_init: strhi r5, [r3], #4 bhi 1b +#ifdef INIT_ATTR + /* copy init code to codec buffer */ + ldr r2, =_initstart + ldr r3, =_initend + ldr r4, =_initcopy + +1: + cmp r3, r2 + ldrhi r5, [r4], #4 + strhi r5, [r2], #4 + bhi 1b +#endif + /* Zero out IBSS */ ldr r2, =_iedata ldr r3, =_iend |