Rework signal code to allow using it by other modules, like linprocfs:

1. Linux sigset always 64 bit on all platforms. In order to move Linux
sigset code to the linux_common module define it as 64 bit int. Move
Linux sigset manipulation routines to the MI path.

2. Move Linux signal number definitions to the MI path. In general, they
are the same on all platforms except for a few signals.

3. Map Linux RT signals to the FreeBSD RT signals and hide signal conversion
tables to avoid conversion errors.

4. Emulate Linux SIGPWR signal via FreeBSD SIGRTMIN signal which is outside
of allowed on Linux signal numbers.

PR:		197216

1 files changed, 4 insertions, 26 deletions

diff --git a/sys/amd64/linux/linux_sysvec.c b/sys/amd64/linux/linux_sysvec.c
index 1c19018..e9ab8b3 100644
--- a/sys/amd64/linux/linux_sysvec.c
+++ b/sys/amd64/linux/linux_sysvec.c
@@ -150,28 +150,6 @@ static int bsd_to_linux_errno[ELAST + 1] = {
 	 -72, -67, -71
 };
 
-int bsd_to_linux_signal[LINUX_SIGTBLSZ] = {
-	LINUX_SIGHUP, LINUX_SIGINT, LINUX_SIGQUIT, LINUX_SIGILL,
-	LINUX_SIGTRAP, LINUX_SIGABRT, 0, LINUX_SIGFPE,
-	LINUX_SIGKILL, LINUX_SIGBUS, LINUX_SIGSEGV, LINUX_SIGSYS,
-	LINUX_SIGPIPE, LINUX_SIGALRM, LINUX_SIGTERM, LINUX_SIGURG,
-	LINUX_SIGSTOP, LINUX_SIGTSTP, LINUX_SIGCONT, LINUX_SIGCHLD,
-	LINUX_SIGTTIN, LINUX_SIGTTOU, LINUX_SIGIO, LINUX_SIGXCPU,
-	LINUX_SIGXFSZ, LINUX_SIGVTALRM, LINUX_SIGPROF, LINUX_SIGWINCH,
-	0, LINUX_SIGUSR1, LINUX_SIGUSR2
-};
-
-int linux_to_bsd_signal[LINUX_SIGTBLSZ] = {
-	SIGHUP, SIGINT, SIGQUIT, SIGILL,
-	SIGTRAP, SIGABRT, SIGBUS, SIGFPE,
-	SIGKILL, SIGUSR1, SIGSEGV, SIGUSR2,
-	SIGPIPE, SIGALRM, SIGTERM, SIGBUS,
-	SIGCHLD, SIGCONT, SIGSTOP, SIGTSTP,
-	SIGTTIN, SIGTTOU, SIGURG, SIGXCPU,
-	SIGXFSZ, SIGVTALRM, SIGPROF, SIGWINCH,
-	SIGIO, SIGURG, SIGSYS
-};
-
 #define LINUX_T_UNKNOWN  255
 static int _bsd_to_linux_trapcode[] = {
 	LINUX_T_UNKNOWN,	/* 0 */
@@ -657,8 +635,8 @@ linux_rt_sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask)
 	sfp = (struct l_rt_sigframe *)((unsigned long)sp & ~0xFul);
 	mtx_unlock(&psp->ps_mtx);
 
-	/* Translate the signal if appropriate. */
-	sig = BSD_TO_LINUX_SIGNAL(sig);
+	/* Translate the signal. */
+	sig = bsd_to_linux_signal(sig);
 
 	/* Save user context. */
 	bzero(&sf, sizeof(sf));
@@ -772,8 +750,8 @@ struct sysentvec elf_linux_sysvec = {
 	.sv_size	= LINUX_SYS_MAXSYSCALL,
 	.sv_table	= linux_sysent,
 	.sv_mask	= 0,
-	.sv_sigsize	= LINUX_SIGTBLSZ,
-	.sv_sigtbl	= bsd_to_linux_signal,
+	.sv_sigsize	= 0,
+	.sv_sigtbl	= NULL,
 	.sv_errsize	= ELAST + 1,
 	.sv_errtbl	= bsd_to_linux_errno,
 	.sv_transtrap	= translate_traps,