arm: factor all exception handlers out of the crt0.S files

Remove the implementations of all exceptions handlers from the
various crt0.S files and have a single implementation in system-arm.h
The new implementation is weak so that it can be overwritten by some
specific code (like the unwinder)

Change-Id: Ib3e041ed6037376bbe0e79286057e1051640dd90
Reviewed-on: http://gerrit.rockbox.org/205
Reviewed-by: Marcin Bukat <marcin.bukat@gmail.com>

1 files changed, 0 insertions, 29 deletions

diff --git a/firmware/target/arm/tcc77x/crt0.S b/firmware/target/arm/tcc77x/crt0.S
index d0873102d4..aebd8974da 100644
--- a/firmware/target/arm/tcc77x/crt0.S
+++ b/firmware/target/arm/tcc77x/crt0.S
@@ -212,35 +212,6 @@ vectors_end:
 
     .text
 
-/* All illegal exceptions call into UIE with exception address as first
-   parameter. This is calculated differently depending on which exception
-   we're in. Second parameter is exception number, used for a string lookup
-   in UIE.
- */
-undef_instr_handler:
-    sub    r0, lr, #4
-    mov    r1, #0
-    b      UIE
-
-/* We run sys mode most of the time, and should never see a software
-   exception being thrown. Make it illegal and call UIE.
- */
-software_int_handler:
-reserved_handler:
-    sub    r0, lr, #4
-    mov    r1, #4
-    b      UIE
-
-prefetch_abort_handler:
-    sub    r0, lr, #4
-    mov    r1, #1
-    b      UIE
-
-data_abort_handler:
-    sub    r0, lr, #8
-    mov    r1, #2
-    b      UIE
-
 irq_handler:
     stmfd  sp!, {r0-r3, r12, lr}
     bl     irq