| Message ID | 20230202005204.2055899-2-richard.henderson@linaro.org |
|---|---|
| State | New |
| Headers | show |
| Series | linux-user/sparc: Handle missing traps | expand |
On Wed, 2023-02-01 at 14:51 -1000, Richard Henderson wrote: > The linux kernel's trap tables vector all unassigned trap > numbers to BAD_TRAP, which then raises SIGILL. > > Reported-by: Ilya Leoshkevich <iii@linux.ibm.com> > Signed-off-by: Richard Henderson <richard.henderson@linaro.org> > --- > linux-user/sparc/cpu_loop.c | 8 ++++++++ > 1 file changed, 8 insertions(+) Thanks! Tested-by: Ilya Leoshkevich <iii@linux.ibm.com>
diff --git a/linux-user/sparc/cpu_loop.c b/linux-user/sparc/cpu_loop.c index 434c90a55f..c120c42278 100644 --- a/linux-user/sparc/cpu_loop.c +++ b/linux-user/sparc/cpu_loop.c @@ -248,6 +248,14 @@ void cpu_loop (CPUSPARCState *env) cpu_exec_step_atomic(cs); break; default: + /* + * Most software trap numbers vector to BAD_TRAP. + * Handle anything not explicitly matched above. + */ + if (trapnr >= TT_TRAP && trapnr <= TT_TRAP + 0x7f) { + force_sig_fault(TARGET_SIGILL, ILL_ILLTRP, env->pc); + break; + } fprintf(stderr, "Unhandled trap: 0x%x\n", trapnr); cpu_dump_state(cs, stderr, 0); exit(EXIT_FAILURE);
The linux kernel's trap tables vector all unassigned trap numbers to BAD_TRAP, which then raises SIGILL. Reported-by: Ilya Leoshkevich <iii@linux.ibm.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> --- linux-user/sparc/cpu_loop.c | 8 ++++++++ 1 file changed, 8 insertions(+)