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roxas75 / rxTools

rxTools
http://www.rxtools.net/
GNU General Public License v2.0
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Exception handlers not working, except for Data Abort #471

Open TuxSH opened 8 years ago

TuxSH commented 8 years ago

All the addresses in installHandlers are off by 4.

According to bootROM (rom:0 being of course at address 0xffff0000):

ROM:00000004                 B               sub_9C # undefined instruction

ROM:0000009C ; =============== S U B R O U T I N E =======================================
ROM:0000009C
ROM:0000009C ; Attributes: thunk
ROM:0000009C
ROM:0000009C sub_9C                                  ; CODE XREF: sub_0+4j
ROM:0000009C                 LDR             PC, =0x8000018
ROM:0000009C ; End of function sub_9C
ROM:0000009C
ROM:0000009C ; ---------------------------------------------------------------------------
ROM:000000A0 off_A0          DCD 0x8000018           ; DATA XREF: sub_9Cr
ROM:000000A4
ROM:000000A4 ; =============== S U B R O U T I N E =======================================

thus 0x8000018 should contain 0xe51ff004 (ldr pc, [pc, #-4]) and 0x800001C handleInst, etc.

You can trigger a prefetch abort using bkpt 1 for example.