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authorEric W. Biederman <ebiederm@xmission.com>2021-05-28 13:38:19 -0500
committerEric W. Biederman <ebiederm@xmission.com>2021-07-23 13:08:57 -0500
commit2c9f7eaf08659fa23d25b93a446f74306b3abea8 (patch)
treeb6a434968e98a89072d5ed40a01b274d983eb03b /kernel/signal.c
parent726e337b645478ecf41eb261fdde3e8a9476a008 (diff)
signal/sparc: si_trapno is only used with SIGILL ILL_ILLTRP
While reviewing the signal handlers on sparc it became clear that si_trapno is only set to a non-zero value when sending SIGILL with si_code ILL_ILLTRP. Add force_sig_fault_trapno and send SIGILL ILL_ILLTRP with it. Remove the define of __ARCH_SI_TRAPNO and remove the always zero si_trapno parameter from send_sig_fault and force_sig_fault. v1: https://lkml.kernel.org/r/m1eeers7q7.fsf_-_@fess.ebiederm.org v2: https://lkml.kernel.org/r/20210505141101.11519-7-ebiederm@xmission.com Link: https://lkml.kernel.org/r/87mtqnxx89.fsf_-_@disp2133 Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Diffstat (limited to 'kernel/signal.c')
-rw-r--r--kernel/signal.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/kernel/signal.c b/kernel/signal.c
index a3229add4455..87a374225277 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -1808,6 +1808,22 @@ int force_sig_ptrace_errno_trap(int errno, void __user *addr)
return force_sig_info(&info);
}
+/* For the rare architectures that include trap information using
+ * si_trapno.
+ */
+int force_sig_fault_trapno(int sig, int code, void __user *addr, int trapno)
+{
+ struct kernel_siginfo info;
+
+ clear_siginfo(&info);
+ info.si_signo = sig;
+ info.si_errno = 0;
+ info.si_code = code;
+ info.si_addr = addr;
+ info.si_trapno = trapno;
+ return force_sig_info(&info);
+}
+
int kill_pgrp(struct pid *pid, int sig, int priv)
{
int ret;
@@ -3243,6 +3259,9 @@ enum siginfo_layout siginfo_layout(unsigned sig, int si_code)
#endif
else if ((sig == SIGTRAP) && (si_code == TRAP_PERF))
layout = SIL_PERF_EVENT;
+ else if (IS_ENABLED(CONFIG_SPARC) &&
+ (sig == SIGILL) && (si_code == ILL_ILLTRP))
+ layout = SIL_FAULT_TRAPNO;
#ifdef __ARCH_SI_TRAPNO
else if (layout == SIL_FAULT)
layout = SIL_FAULT_TRAPNO;

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