printsiginfo: add SIGSYS decoding

* configure.ac (AC_CHECK_MEMBERS): Check for siginfo_t.si_syscall.
* signal.c (SYS_SECCOMP): Define if not yet defined.
(sigsys_codes): new xlat structure.
(printsiginfo): Decode SIGSYS.

2 files changed, 21 insertions, 1 deletions

diff --git a/configure.ac b/configure.ac
index 682f54e..39832ef 100644
--- a/configure.ac
+++ b/configure.ac
@@ -256,7 +256,8 @@ AC_CHECK_TYPES([struct user_desc],,, [#include <asm/ldt.h>])
 AC_CHECK_MEMBERS([struct utsname.domainname],,, [#include <sys/utsname.h>])
 
 AC_CHECK_MEMBERS([struct sigevent._sigev_un._pad,
-		  struct sigevent.__pad],,, [#include <signal.h>])
+		  struct sigevent.__pad,
+		  siginfo_t.si_syscall],,, [#include <signal.h>])
 
 AC_CHECK_TYPES([struct flock64],,, [#include <fcntl.h>])
 
diff --git a/signal.c b/signal.c
index c85e1b5..e3072f1 100644
--- a/signal.c
+++ b/signal.c
@@ -354,6 +354,7 @@ print_sigset_addr_len(struct tcb *tcp, long addr, long len)
 #define BUS_ADRALN      1       /* invalid address alignment */
 #define BUS_ADRERR      2       /* non-existant physical address */
 #define BUS_OBJERR      3       /* object specific hardware error */
+#define SYS_SECCOMP     1       /* seccomp triggered */
 #define TRAP_BRKPT      1       /* process breakpoint */
 #define TRAP_TRACE      2       /* process trace trap */
 #define CLD_EXITED      1       /* child has exited */
@@ -503,6 +504,14 @@ static const struct xlat sigbus_codes[] = {
 	XLAT_END
 };
 
+#ifndef SYS_SECCOMP
+# define SYS_SECCOMP 1
+#endif
+static const struct xlat sigsys_codes[] = {
+	XLAT(SYS_SECCOMP),
+	XLAT_END
+};
+
 static void
 printsigsource(const siginfo_t *sip)
 {
@@ -565,6 +574,9 @@ printsiginfo(siginfo_t *sip, int verbose)
 		case SIGBUS:
 			code = xlookup(sigbus_codes, sip->si_code);
 			break;
+		case SIGSYS:
+			code = xlookup(sigsys_codes, sip->si_code);
+			break;
 		}
 	}
 	if (code)
@@ -640,6 +652,13 @@ printsiginfo(siginfo_t *sip, int verbose)
 					break;
 				}
 				break;
+#ifdef HAVE_SIGINFO_T_SI_SYSCALL
+			case SIGSYS:
+				tprintf(", si_call_addr=%#lx, si_syscall=%d, si_arch=%u",
+					(unsigned long) sip->si_call_addr,
+					sip->si_syscall, sip->si_arch);
+				break;
+#endif
 			default:
 				if (sip->si_pid || sip->si_uid)
 				        printsigsource(sip);