libc: further centralize syscall symbols

All architectures necessarily implement _exit(2) and vfork(2) so
declare them in sys/Symbol.map.

Reviewed by:	imp, kib, emaste
Differential Revision:	https://reviews.freebsd.org/D42614

(cherry picked from commit e4a1800f06884dc00931f55d0fa8cd9ce473a83e)

8 files changed, 2 insertions, 28 deletions

diff --git a/lib/libc/aarch64/Symbol.map b/lib/libc/aarch64/Symbol.map
index 574b5e49d106..5e71a32786b4 100644
--- a/lib/libc/aarch64/Symbol.map
+++ b/lib/libc/aarch64/Symbol.map
@@ -4,9 +4,6 @@
  * stdlib/Symbol.map, string/Symbol.map, sys/Symbol.map, ...).
  */
 FBSD_1.0 {
-	/* PSEUDO syscalls */
-	_exit;
-
 	.mcount;
 	_setjmp;
 	_longjmp;
@@ -24,7 +21,6 @@ FBSD_1.0 {
 	htons;
 	ntohl;
 	ntohs;
-	vfork;
 	makecontext;
 };
 
diff --git a/lib/libc/amd64/Symbol.map b/lib/libc/amd64/Symbol.map
index 0bd3dabdb19e..445220db11b7 100644
--- a/lib/libc/amd64/Symbol.map
+++ b/lib/libc/amd64/Symbol.map
@@ -4,9 +4,6 @@
  * stdlib/Symbol.map, string/Symbol.map, sys/Symbol.map, ...).
  */
 FBSD_1.0 {
-	/* PSEUDO syscalls */
-	_exit;
-
 	.mcount;
 	_setjmp;
 	_longjmp;
@@ -37,7 +34,6 @@ FBSD_1.0 {
 	amd64_set_gsbase;
 	brk;
 	sbrk;
-	vfork;
 };
 
 FBSD_1.6 {
diff --git a/lib/libc/arm/Symbol.map b/lib/libc/arm/Symbol.map
index d91e681f4478..8cb5cbe232d8 100644
--- a/lib/libc/arm/Symbol.map
+++ b/lib/libc/arm/Symbol.map
@@ -4,9 +4,6 @@
  * stdlib/Symbol.map, string/Symbol.map, sys/Symbol.map, ...).
  */
 FBSD_1.0 {
-	/* PSEUDO syscalls */
-	_exit;
-
 	__mcount;
 	_setjmp;
 	_longjmp;
@@ -23,7 +20,6 @@ FBSD_1.0 {
 	htons;
 	ntohl;
 	ntohs;
-	vfork;
 	brk;
 	sbrk;
 };
diff --git a/lib/libc/i386/Symbol.map b/lib/libc/i386/Symbol.map
index d09c98487f64..1ecfb4ecda00 100644
--- a/lib/libc/i386/Symbol.map
+++ b/lib/libc/i386/Symbol.map
@@ -4,9 +4,6 @@
  * stdlib/Symbol.map, string/Symbol.map, sys/Symbol.map, ...).
  */
 FBSD_1.0 {
-	/* PSEUDO syscalls */
-	_exit;
-
 	.mcount;
 	_setjmp;
 	_longjmp;
@@ -25,7 +22,6 @@ FBSD_1.0 {
 	htons;
 	ntohl;
 	ntohs;
-	vfork;
 	brk;
 	i386_clr_watch;
 	i386_get_fsbase;
diff --git a/lib/libc/powerpc/Symbol.map b/lib/libc/powerpc/Symbol.map
index ff99e09028db..2d883a02eeb9 100644
--- a/lib/libc/powerpc/Symbol.map
+++ b/lib/libc/powerpc/Symbol.map
@@ -4,9 +4,6 @@
  * stdlib/Symbol.map, string/Symbol.map, sys/Symbol.map, ...).
  */
 FBSD_1.0 {
-	/* PSEUDO syscalls */
-	_exit;
-
 	_mcount;
 	_setjmp;
 	_longjmp;
@@ -30,7 +27,6 @@ FBSD_1.0 {
 	ntohs;
 	brk;
 	sbrk;
-	vfork;
 };
 
 FBSD_1.3 {
diff --git a/lib/libc/powerpc64/Symbol.map b/lib/libc/powerpc64/Symbol.map
index bad72c5a6efc..2de7ffb241e7 100644
--- a/lib/libc/powerpc64/Symbol.map
+++ b/lib/libc/powerpc64/Symbol.map
@@ -4,9 +4,6 @@
  * stdlib/Symbol.map, string/Symbol.map, sys/Symbol.map, ...).
  */
 FBSD_1.0 {
-	/* PSEUDO syscalls */
-	_exit;
-
 	_mcount;
 	_setjmp;
 	_longjmp;
@@ -30,7 +27,6 @@ FBSD_1.0 {
 	ntohs;
 	brk;
 	sbrk;
-	vfork;
 };
 
 FBSDprivate_1.0 {
diff --git a/lib/libc/riscv/Symbol.map b/lib/libc/riscv/Symbol.map
index 6726863e9b97..359a8238fb32 100644
--- a/lib/libc/riscv/Symbol.map
+++ b/lib/libc/riscv/Symbol.map
@@ -4,9 +4,6 @@
  * stdlib/Symbol.map, string/Symbol.map, sys/Symbol.map, ...).
  */
 FBSD_1.0 {
-	/* PSEUDO syscalls */
-	_exit;
-
 	_setjmp;
 	_longjmp;
 	fabs;
@@ -23,7 +20,6 @@ FBSD_1.0 {
 	htons;
 	ntohl;
 	ntohs;
-	vfork;
 	makecontext;
 };
 
diff --git a/lib/libc/sys/Symbol.map b/lib/libc/sys/Symbol.map
index 05a2f21d554e..b59ec1858ffd 100644
--- a/lib/libc/sys/Symbol.map
+++ b/lib/libc/sys/Symbol.map
@@ -30,6 +30,7 @@ FBSD_1.0 {
 	__setugid;
 	__syscall;
 	__sysctl;
+	_exit;
 	_umtx_op;
 	abort2;
 	accept;
@@ -283,6 +284,7 @@ FBSD_1.0 {
 	utrace;
 	uuidgen;
 	vadvise;
+	vfork;
 	wait4;
 	write;
 	writev;