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| author | Marcin Bukat <marcin.bukat@gmail.com> | 2011-10-11 16:06:03 +0000 |
|---|---|---|
| committer | Marcin Bukat <marcin.bukat@gmail.com> | 2011-10-11 16:06:03 +0000 |
| commit | bf056d5372b6375b088836dd57339d7a499fe0d6 (patch) | |
| tree | 0e8b2d2f9782b3267b289f8c9715e6a6cb42660d /firmware/target/arm/tcc77x | |
| parent | 90559156450082628ab1b3aed3d2db862de377c1 (diff) | |
| download | rockbox-bf056d5372b6375b088836dd57339d7a499fe0d6.tar.gz rockbox-bf056d5372b6375b088836dd57339d7a499fe0d6.tar.bz2 rockbox-bf056d5372b6375b088836dd57339d7a499fe0d6.zip | |
Switch to SYS mode on arm FS#12322 by me
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30741 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'firmware/target/arm/tcc77x')
| -rw-r--r-- | firmware/target/arm/tcc77x/crt0.S | 23 |
1 files changed, 12 insertions, 11 deletions
diff --git a/firmware/target/arm/tcc77x/crt0.S b/firmware/target/arm/tcc77x/crt0.S index 251fd0c903..d0873102d4 100644 --- a/firmware/target/arm/tcc77x/crt0.S +++ b/firmware/target/arm/tcc77x/crt0.S @@ -141,16 +141,16 @@ copied_start: ldr r11, =dma_play_data #endif - /* Let abort and undefined modes use IRQ stack */ - mov r0,#0xd7 - msr cpsr, r0 + /* Let svc, abort and undefined modes use irq stack */ + msr cpsr, #0xd3 ldr sp, =irq_stack - mov r0,#0xdb - msr cpsr, r0 + msr cpsr, #0xd7 + ldr sp, =irq_stack + msr cpsr, #0xdb ldr sp, =irq_stack - /* Switch to supervisor mode */ - mov r0,#0xd3 + /* Switch to sys mode */ + mov r0,#0xdf msr cpsr, r0 ldr sp, =stackend @@ -222,12 +222,14 @@ undef_instr_handler: mov r1, #0 b UIE -/* We run supervisor mode most of the time, and should never see a software - exception being thrown. Perhaps make it illegal and call 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: - movs pc, lr + sub r0, lr, #4 + mov r1, #4 + b UIE prefetch_abort_handler: sub r0, lr, #4 @@ -255,4 +257,3 @@ irq_stack: /* 256 words of FIQ stack */ .space 256*4 fiq_stack: - |