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only clear int 7 in int7 exception handler

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Markus Fröschle
2013-08-09 13:49:59 +00:00
parent 844dc74a2c
commit ce6e14d347
1 changed files with 8 additions and 7 deletions
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15
sources/exceptions.S
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@@ -804,20 +804,21 @@ irq7:
lea -12(sp),sp lea -12(sp),sp
movem.l d0/a0,(sp) movem.l d0/a0,(sp)
move.l __RAMBAR0+0x008,a0 // Real Access Error handler move.l __RAMBAR0+0x008,a0 // real access error handler
move.l a0,8(sp) // This will be the return address for rts move.l a0,8(sp) // this will be the return address for rts
move.w 12(sp),d0 // Format/Vector word move.w 12(sp),d0 // format/vector word
andi.l #0xf000,d0 // Keep only the Format andi.l #0xf000,d0 // keep only the format
ori.l #2*4,d0 // Simulate Vector #2, no Fault ori.l #2*4,d0 // simulate vector #2, no fault
move.w d0,12(sp) move.w d0,12(sp)
// TODO: Inside an interrupt handler, 16(sp) is the return address. // TODO: Inside an interrupt handler, 16(sp) is the return address.
// For an Access Error, it should be the address of the fault instruction instead // For an Access Error, it should be the address of the fault instruction instead
lea MCF_EPORT_EPFR,a0 lea MCF_EPORT_EPFR,a0
move.b #0x80,(a0) // clear int7 bset #7,(a0) // clear int 7
move.l (sp)+,d0
move.l (sp)+,d0 // restore registers
move.l (sp)+,a0 move.l (sp)+,a0
rts // Forward to the Access Error handler rts // Forward to the Access Error handler