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| author | Rafaël Carré <rafael.carre@gmail.com> | 2010-06-18 18:31:14 +0000 |
|---|---|---|
| committer | Rafaël Carré <rafael.carre@gmail.com> | 2010-06-18 18:31:14 +0000 |
| commit | 3e690ac60d1d525e54f80cc6ece4d16e2cd9009f (patch) | |
| tree | 0e64defc1ba5c6c3cf871aaaa8952961fa69bb10 | |
| parent | b3e27a80e3d7c4124b4767578d17e84e83acd3ad (diff) | |
| download | rockbox-3e690ac60d1d525e54f80cc6ece4d16e2cd9009f.tar.gz rockbox-3e690ac60d1d525e54f80cc6ece4d16e2cd9009f.zip | |
arm/crt0.S: comment why the reset vector doesn't use absolute addressing
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26929 a1c6a512-1295-4272-9138-f99709370657
| -rw-r--r-- | firmware/target/arm/crt0.S | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/firmware/target/arm/crt0.S b/firmware/target/arm/crt0.S index f52056617a..3765df9ffc 100644 --- a/firmware/target/arm/crt0.S +++ b/firmware/target/arm/crt0.S | |||
| @@ -26,6 +26,13 @@ | |||
| 26 | .global start | 26 | .global start |
| 27 | start: | 27 | start: |
| 28 | /* Exception vectors */ | 28 | /* Exception vectors */ |
| 29 | |||
| 30 | /* | ||
| 31 | * reset vector *MUST* use relative-addressing only | ||
| 32 | * the MMU might not be enabled yet, and the PC might point to | ||
| 33 | * a memory region not present in the linked binary | ||
| 34 | */ | ||
| 35 | |||
| 29 | b newstart | 36 | b newstart |
| 30 | b undef_instr_handler | 37 | b undef_instr_handler |
| 31 | b software_int_handler | 38 | b software_int_handler |