d0p1/ack
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ceriel 1991-10-08 09:23:46 +00:00
parent 8a44c33e9f
commit 023b747e63
2 changed files with 65 additions and 0 deletions
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mach/sparc/libdb/.distr Normal file
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machdep.s

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mach/sparc/libdb/machdep.s Normal file
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.globl ___Get_PC, ___Set_PC
! $Header$
! This is the machine-dependant part of the ACK debugger support.
! ___Get_PC takes a frame pointer (local base) argument and returns the
! return address from this frame.
! ___Set_PC takes a frame pointer (local base) argument plus a return
! address and sets the return address of this frame to the
! return address supplied.
___Get_PC:
ld [%l0],%o0
tst %o0
beq 3f
nop
cmp %o0,%l1
bne 1f
nop
add %i7, 8, %o0
3:
retl
nop
1:
ta 3
add %l1,%g0,%o1
2: add %o1,7,%o2
andn %o2,7,%o2
ld [%o2+4],%o1
cmp %o0,%o1
bne 2b
nop
ld [%o2+0x3c],%o0
inc 8,%o0
retl
nop
___Set_PC:
ld [%l0],%o0
tst %o0
beq 3f
nop
cmp %o0,%l1
bne 1f
nop
ld [%l0+4],%i7
dec 8,%i7
3:
retl
nop
1:
ta 3
add %l1,%g0,%o1
2: add %o1,7,%o2
andn %o2,7,%o2
ld [%o2+4],%o1
cmp %o0,%o1
bne 2b
nop
ld [%l0+4],%o0
dec 8,%o0
st %o0,[%o2+0x3c]
retl
nop