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| author | Christian Cunningham <cc@localhost> | 2022-03-16 22:28:33 -0700 |
|---|---|---|
| committer | Christian Cunningham <cc@localhost> | 2022-03-16 22:28:33 -0700 |
| commit | a9f63b8cdb930d079cc69d492fe44dc8224c1e03 (patch) | |
| tree | c97c9f84f5caa2b0cc77850c21f33b9f5cefaecb /src/exceptions/fiq.S | |
| parent | a3732c11ad3bcd2c01a36d0a82a6f310fe8557af (diff) | |
More comments
Diffstat (limited to 'src/exceptions/fiq.S')
| -rw-r--r-- | src/exceptions/fiq.S | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/src/exceptions/fiq.S b/src/exceptions/fiq.S index f323a02..005ed76 100644 --- a/src/exceptions/fiq.S +++ b/src/exceptions/fiq.S @@ -6,13 +6,17 @@ fiq: bl c_fiq_handler cmp r0, #1 bne 1f + // Schedule if interrupted a thread mrs r1, spsr and r1, r1, #0x1f cmp r1, #0x10 bne 1f ldmfd sp!, {r0-r12,lr} + // Don't skip missed instruction upon return sub lr, #4 push {r3} + // Store the instruction in a special area for + // future processing ldr r3, =irqlr str lr, [r3, #0] pop {r3} @@ -21,6 +25,3 @@ fiq: 1: ldmfd sp!, {r0-r12,lr} subs pc, lr, #4 - -.section .data -fiq_msg: .asciz "FIQ\n" |