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- don't movem a7, it's the stack pointer. the cpu saves it for us before processing exceptions.

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- push the address of the iframe before calling the C handler.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@26724 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
François Revol 2008-08-02 00:34:40 +00:00
parent b061bf2471
commit 150b5ae01f
1 changed files with 5 additions and 3 deletions
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6
src/system/kernel/arch/m68k/arch_exceptions.S
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@ -94,7 +94,7 @@ FUNCTION(__m68k_exception_noop):
FUNCTION(__m68k_exception_common):
/* save regs */
movem.l %d0-%d7/%a0-%a7,-(%sp) /* push the iframe address */
movem.l %d0-%d7/%a0-%a6,-(%sp) /* push the iframe address */
/* save fp */
sub.l #FPU_STATE_sizeof,%sp
fsave (%sp)
@ -108,7 +108,9 @@ null_sav_1:
sub.l #IFRAME_fpu-IFRAME_fp,%sp
null_sav_2:
move.l %sp,-(%sp) /* push address of iframe */
bsr m68k_exception_entry /* call C entry */
add.l #4,%sp
/* restore fp */
tst.b IFRAME_fpu-IFRAME_fp(%sp) /* check for a null state */
@ -123,7 +125,7 @@ null_res_2:
frestore (%sp)
add.l #FPU_STATE_sizeof,%sp
/* restore regs */
movem.l (%sp)+,%d0-%d7/%a0-%a7
movem.l (%sp)+,%d0-%d7/%a0-%a6
rte