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authorAndreas Schwab <schwab@linux-m68k.org>2008-11-18 21:25:17 +0100
committerGeert Uytterhoeven <geert@linux-m68k.org>2011-03-16 19:10:40 +0100
commitcf6da575ad8d86afa591dd78114067bbff448c36 (patch)
treedbad200525a7db07121499f42e2ea765ff4a120a /arch/m68k
parentf67080884a81f58cf95e25c284e30cbed21122a3 (diff)
downloadop-kernel-dev-cf6da575ad8d86afa591dd78114067bbff448c36.zip
op-kernel-dev-cf6da575ad8d86afa591dd78114067bbff448c36.tar.gz
m68k: Allow all kernel traps to be handled via exception fixups
This will be needed by the ARAnyM Native Feature initialization code. Also document that the VEC_TRACE check is needed for 68020/30. Signed-off-by: Andreas Schwab <schwab@linux-m68k.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Diffstat (limited to 'arch/m68k')
-rw-r--r--arch/m68k/kernel/traps.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/arch/m68k/kernel/traps.c b/arch/m68k/kernel/traps.c
index cd802d4..4022bbc 100644
--- a/arch/m68k/kernel/traps.c
+++ b/arch/m68k/kernel/traps.c
@@ -58,6 +58,7 @@ asm(".text\n"
/*
* this must be called very early as the kernel might
* use some instruction that are emulated on the 060
+ * and so we're prepared for early probe attempts (e.g. nf_init).
*/
void __init base_trap_init(void)
{
@@ -78,6 +79,7 @@ void __init base_trap_init(void)
}
vectors[VEC_BUSERR] = buserr;
+ vectors[VEC_ILLEGAL] = trap;
vectors[VEC_SYS] = system_call;
}
@@ -1055,9 +1057,11 @@ asmlinkage void trap_c(struct frame *fp)
siginfo_t info;
if (fp->ptregs.sr & PS_S) {
- if ((fp->ptregs.vector >> 2) == VEC_TRACE) {
- /* traced a trapping instruction */
- } else
+ if (fp->ptregs.vector == VEC_TRACE << 2) {
+ /* traced a trapping instruction on a 68020/30,
+ * real exception will be executed afterwards.
+ */
+ } else if (!handle_kernel_fault(&fp->ptregs))
bad_super_trap(fp);
return;
}
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