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experimental: directly jump through bus error vector on bus error

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This commit is contained in:
Markus Fröschle
2016-04-17 18:20:28 +00:00
parent d2416eb8fe
commit 6632cd1508
1 changed files with 6 additions and 3 deletions
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9
BaS_gcc/sys/exceptions.S
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@@ -326,8 +326,9 @@ access:
move.l 4(a6),-(sp) // push format_status move.l 4(a6),-(sp) // push format_status
move.l 8(a6),-(sp) // pc at exception move.l 8(a6),-(sp) // pc at exception
move.l MCF_MMU_MMUAR,-(sp) // MMU fault address move.l MCF_MMU_MMUAR,-(sp) // MMU fault address
move.l MCF_MMU_MMUSR,-(sp) // MMU status regisrter move.l MCF_MMU_MMUSR,-(sp) // MMU status register
move.w #0x2300,sr // can lower interrupt mask now that MMU status is safe // probably doesn't make sense since we still have a potential unmapped MMU page
// move.w #0x2300,sr // can lower interrupt mask now that MMU status is safe
jsr _mmutr_miss // call C routine jsr _mmutr_miss // call C routine
lea 4 * 4(sp),sp // adjust stack lea 4 * 4(sp),sp // adjust stack
@@ -341,7 +342,9 @@ access:
bus_error: bus_error:
movem.l (sp),d0-d1/a0-a1 // restore registers movem.l (sp),d0-d1/a0-a1 // restore registers
unlk a6 unlk a6
bra std_exc_vec // FIXME: this seems to be bogous... move.l 0x08,-(sp)
rts
// bra std_exc_vec // FIXME: this seems to be bogous...
zero_divide: zero_divide:
move.w #0x2700,sr // disable interrupt move.w #0x2700,sr // disable interrupt