Firebee/FireBee_SVN
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

fixed a bug with LINK instruction not saving address register

Browse Source
This commit is contained in:
Markus Fröschle
2014-09-06 19:27:11 +00:00
parent 3cfcd9e7c3
commit 307c5368b4
2 changed files with 81 additions and 78 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
BaS_gcc/.gdbinit
View File

@@ -1,7 +1,8 @@
#set disassemble-next-line on #set disassemble-next-line on
define tr define tr
!killall m68k-bdm-gdbserver #!killall m68k-bdm-gdbserver
target remote | m68k-bdm-gdbserver pipe /dev/bdmcf3 target remote | m68k-bdm-gdbserver pipe /dev/bdmcf3
#target remote localhost:1234
#target remote | m68k-bdm-gdbserver pipe /dev/tblcf3 #target remote | m68k-bdm-gdbserver pipe /dev/tblcf3
#target dbug /dev/ttyS0 #target dbug /dev/ttyS0
#monitor bdm-reset #monitor bdm-reset

34
BaS_gcc/sys/exceptions.S
View File

@@ -208,7 +208,7 @@
/**********************************************************/ /**********************************************************/
.altmacro .altmacro
.macro irq vector,int_mask,clr_int .macro irq vector,int_mask,clr_int
move.w #0x2700,sr // disable interrupt //move.w #0x2700,sr // disable interrupt
subq.l #8,a7 subq.l #8,a7
movem.l d0/a5,(a7) // save registers movem.l d0/a5,(a7) // save registers
@@ -326,7 +326,7 @@ init_vec_loop:
*/ */
vector_table_start: vector_table_start:
std_exc_vec: std_exc_vec:
move.w #0x2700,sr // disable interrupt //move.w #0x2700,sr // disable interrupt
subq.l #8,a7 subq.l #8,a7
movem.l d0/a5,(sp) // save registers movem.l d0/a5,(sp) // save registers
move.w 8(sp),d0 // fetch vector move.w 8(sp),d0 // fetch vector
@@ -365,9 +365,9 @@ noprint:
move.l 4(sp),a5 // restore a5 move.l 4(sp),a5 // restore a5
move.l d0,4(a7) // store exception routine address move.l d0,4(a7) // store exception routine address
move.w 10(a7),d0 // restore original SR //move.w 10(a7),d0 // restore original SR
bset #13,d0 // set supervisor bit //bset #13,d0 // set supervisor bit
move.w d0,sr // //move.w d0,sr //
move.l (a7)+,d0 // restore d0 move.l (a7)+,d0 // restore d0
rts // jump to exception routine rts // jump to exception routine
@@ -409,15 +409,15 @@ access_mmu:
cmp.l #__FASTRAM_END,d0 // above max User RAM area? cmp.l #__FASTRAM_END,d0 // above max User RAM area?
bge bus_error // -> bus error bge bus_error // -> bus error
lea -5*4(sp),sp // save gcc scratch registers lea -3 * 4(sp),sp // save gcc scratch registers
movem.l d0-d1/a0-a2,(sp) movem.l d1/a0-a1,(sp)
move.l d0,-(sp) // fault address move.l d0,-(sp) // fault address
jsr _mmutr_miss // else we have an MMU TLB miss jsr _mmutr_miss // else we have an MMU TLB miss
addq.l #4,sp addq.l #4,sp
movem.l (sp),d0-d1/a0-a2 // restore gcc scratch registers movem.l (sp),d1/a0-a1 // restore gcc scratch registers
lea 5*4(sp),sp lea 3 * 4(sp),sp
move.l (sp)+,d0 // restore register move.l (sp)+,d0 // restore register
@@ -995,16 +995,18 @@ video_chg_end:
.extern _isr_execute_handler .extern _isr_execute_handler
_lowlevel_isr_handler: _lowlevel_isr_handler:
move.w #0x2700,sr // disable interrupts move.w #0x2700,sr
link a6,#-4*4 // make room for lea -5 * 4(sp),sp // make room for
movem.l d0-d1/a0-a1,(sp) // gcc scratch registers and save them movem.l d0-d1/a0-a2,(sp) // gcc scratch registers and save them,
// other registers will be handled by gcc itself
move.w 4(a6),d0 // fetch vector number from stack move.w 5 * 4(sp),d0 // fetch vector number from stack
lsr.l #2,d0 // move it in place lsr.l #2,d0 // move it in place
andi.l #0x000000ff,d0 // mask it out andi.l #0x000000ff,d0 // mask it out
move.l d0,-(sp) // push it move.l d0,-(sp) // push it
jsr _isr_execute_handler // call the C handler jsr _isr_execute_handler // call the C handler
lea 4(sp),sp // adjust stack addq.l #4,sp // adjust stack
movem.l (sp),d0-d1/a0-a1 // restore registers
unlk a6 // cleanup stack movem.l (sp),d0-d1/a0-a2 // restore registers
lea 5 * 4(sp),sp
rte rte