syscalls: sigpending

kernel-src/arch/x86-64/syscall.asm

@@ -89,6 +89,7 @@ extern syscall_setgid
 extern syscall_setegid
 extern syscall_sigsuspend
 extern syscall_sigtimedwait
+extern syscall_sigpending
 syscalltab:
 dq syscall_print
 dq syscall_mmap
@@ -180,7 +181,8 @@ dq syscall_setgid
 dq syscall_setegid
 dq syscall_sigsuspend
 dq syscall_sigtimedwait
-syscallcount equ 90
+dq syscall_sigpending
+syscallcount equ 91
 section .text
 global arch_syscall_entry
 ; on entry:

kernel-src/arch/x86-64/syscalllog.c

@@ -5,7 +5,7 @@
 
 #ifdef SYSCALL_LOGGING
 
-#define SYSCALL_COUNT 90
+#define SYSCALL_COUNT 91
 #define LOGSTR(x) arch_e9_puts(x)
 
 static char *name[] = {
@@ -98,7 +98,8 @@ static char *name[] = {
 	"setgid",
 	"setegid",
 	"sigsuspend",
-	"sigtimedwait"
+	"sigtimedwait",
+	"sigpending"
 };
 
 static char *args[] = {
@@ -191,7 +192,8 @@ static char *args[] = {
 	"gid %d", // setgid
 	"egid %d", // setegid
 	"sigset %p", // sigsuspend
-	"set %p info %p, timespec %p" // sigtimedwait
+	"sigset %p info %p, timespec %p", // sigtimedwait
+	"sigset %p\n" // sigpending
 };
 
 #endif

kernel-src/sys/syscalls/sigpending.c

@@ -0,0 +1,14 @@
+#include <kernel/syscalls.h>
+#include <kernel/signal.h>
+#include <logging.h>
+
+syscallret_t syscall_sigpending(context_t *, sigset_t *uset) {
+	syscallret_t ret;
+
+	sigset_t set;
+	signal_pending(_cpu()->thread, &set);
+
+	ret.errno = usercopy_touser(uset, &set, sizeof(sigset_t));
+	ret.ret = ret.errno ? -1 : 0;
+	return ret;
+}