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authorEric W. Biederman <ebiederm@xmission.com>2021-05-28 14:15:51 -0500
committerEric W. Biederman <ebiederm@xmission.com>2021-07-23 13:10:26 -0500
commit7de5f68d497cbc700c4a28cc037dd61f00e452e8 (patch)
tree9ab406f6c94729607482c75caf211097e1a0a25d /kernel/signal.c
parent2c9f7eaf08659fa23d25b93a446f74306b3abea8 (diff)
signal/alpha: si_trapno is only used with SIGFPE and SIGTRAP TRAP_UNK
While reviewing the signal handlers on alpha it became clear that si_trapno is only set to a non-zero value when sending SIGFPE and when sending SITGRAP with si_code TRAP_UNK. Add send_sig_fault_trapno and send SIGTRAP TRAP_UNK, and SIGFPE 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/87h7gvxx7l.fsf_-_@disp2133 Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Diffstat (limited to 'kernel/signal.c')
-rw-r--r--kernel/signal.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/kernel/signal.c b/kernel/signal.c
index 87a374225277..ae06a424aa72 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -1824,6 +1824,23 @@ int force_sig_fault_trapno(int sig, int code, void __user *addr, int trapno)
return force_sig_info(&info);
}
+/* For the rare architectures that include trap information using
+ * si_trapno.
+ */
+int send_sig_fault_trapno(int sig, int code, void __user *addr, int trapno,
+ struct task_struct *t)
+{
+ 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 send_sig_info(info.si_signo, &info, t);
+}
+
int kill_pgrp(struct pid *pid, int sig, int priv)
{
int ret;
@@ -3262,6 +3279,10 @@ enum siginfo_layout siginfo_layout(unsigned sig, int si_code)
else if (IS_ENABLED(CONFIG_SPARC) &&
(sig == SIGILL) && (si_code == ILL_ILLTRP))
layout = SIL_FAULT_TRAPNO;
+ else if (IS_ENABLED(CONFIG_ALPHA) &&
+ ((sig == SIGFPE) ||
+ ((sig == SIGTRAP) && (si_code == TRAP_UNK))))
+ layout = SIL_FAULT_TRAPNO;
#ifdef __ARCH_SI_TRAPNO
else if (layout == SIL_FAULT)
layout = SIL_FAULT_TRAPNO;

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