From: Nicholas Piggin <npiggin@gmail.com>
To: kvm@vger.kernel.org
Cc: Laurent Vivier <lvivier@redhat.com>,
Thomas Huth <thuth@redhat.com>,
linuxppc-dev@lists.ozlabs.org,
Nicholas Piggin <npiggin@gmail.com>
Subject: [kvm-unit-tests v4 02/12] powerpc: Add some checking to exception handler install
Date: Thu, 8 Jun 2023 17:58:16 +1000 [thread overview]
Message-ID: <20230608075826.86217-3-npiggin@gmail.com> (raw)
In-Reply-To: <20230608075826.86217-1-npiggin@gmail.com>
Check to ensure exception handlers are not being overwritten or
invalid exception numbers are used.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
Since v3:
- Simplified code as suggested by Thomas.
lib/powerpc/processor.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/lib/powerpc/processor.c b/lib/powerpc/processor.c
index 05b4b04f..0550e4fc 100644
--- a/lib/powerpc/processor.c
+++ b/lib/powerpc/processor.c
@@ -19,12 +19,16 @@ static struct {
void handle_exception(int trap, void (*func)(struct pt_regs *, void *),
void * data)
{
+ assert(!(trap & ~0xf00));
+
trap >>= 8;
- if (trap < 16) {
- handlers[trap].func = func;
- handlers[trap].data = data;
+ if (func && handlers[trap].func) {
+ printf("exception handler installed twice %#x\n", trap);
+ abort();
}
+ handlers[trap].func = func;
+ handlers[trap].data = data;
}
void do_handle_exception(struct pt_regs *regs)
--
2.40.1
next prev parent reply other threads:[~2023-06-08 8:01 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-08 7:58 [kvm-unit-tests v4 00/12] powerpc: updates, P10, PNV support Nicholas Piggin
2023-06-08 7:58 ` [kvm-unit-tests v4 01/12] powerpc: Report instruction address and MSR in unhandled exception error Nicholas Piggin
2023-06-21 14:53 ` Thomas Huth
2023-06-08 7:58 ` Nicholas Piggin [this message]
2023-06-21 14:54 ` [kvm-unit-tests v4 02/12] powerpc: Add some checking to exception handler install Thomas Huth
2023-06-08 7:58 ` [kvm-unit-tests v4 03/12] powerpc: Abstract H_CEDE calls into a sleep functions Nicholas Piggin
2023-07-03 13:13 ` Thomas Huth
2023-06-08 7:58 ` [kvm-unit-tests v4 04/12] powerpc: Add ISA v3.1 (POWER10) support to SPR test Nicholas Piggin
2023-06-08 7:58 ` [kvm-unit-tests v4 05/12] powerpc: Extract some common helpers and defines to headers Nicholas Piggin
2023-06-08 7:58 ` [kvm-unit-tests v4 06/12] powerpc/sprs: Specify SPRs with data rather than code Nicholas Piggin
2023-06-08 7:58 ` [kvm-unit-tests v4 07/12] powerpc/spapr_vpa: Add basic VPA tests Nicholas Piggin
2023-06-08 7:58 ` [kvm-unit-tests v4 08/12] powerpc: Expand exception handler vector granularity Nicholas Piggin
2023-06-08 7:58 ` [kvm-unit-tests v4 09/12] powerpc: Add support for more interrupts including HV interrupts Nicholas Piggin
2023-06-08 7:58 ` [kvm-unit-tests v4 10/12] powerpc: Discover runtime load address dynamically Nicholas Piggin
2023-06-08 7:58 ` [kvm-unit-tests v4 11/12] powerpc: Support powernv machine with QEMU TCG Nicholas Piggin
2023-06-08 7:58 ` [kvm-unit-tests v4 12/12] powerpc/sprs: Test hypervisor registers on powernv machine Nicholas Piggin
2023-06-14 1:09 ` [kvm-unit-tests v4 00/12] powerpc: updates, P10, PNV support Joel Stanley
2023-06-15 3:02 ` Nicholas Piggin
2023-06-15 8:11 ` Joel Stanley
2023-07-03 13:27 ` Thomas Huth
2023-07-30 10:10 ` Nicholas Piggin
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