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, 32 deletions

diff --git a/firmware/target/arm/imx233/crt0.S b/firmware/target/arm/imx233/crt0.S
index 4ae083ccb2..ffc58d56fc 100644
--- a/firmware/target/arm/imx233/crt0.S
+++ b/firmware/target/arm/imx233/crt0.S
@@ -161,38 +161,6 @@ remap:
 1:
     b       1b
 
-/* 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   @ r0 points to the faulty ARM instruction
-#ifdef USE_THUMB
-    mrs    r1, spsr
-    tst    r1, #(1<<5)  @ T bit set ?
-    subne  r0, lr, #2   @ if yes, r0 points to the faulty THUMB instruction
-#endif /* USE_THUMB */
-    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
-
 /* 256 words of IRQ stack */
     .space 256*4
 irq_stack: