apply hidden visibility to sigreturn code fragments

these were overlooked in the declarations overhaul work because they
are not properly declared, and the current framework even allows their
declared types to vary by arch. at some point this should be cleaned
up, but I'm not sure what the right way would be.

14 files changed, 28 insertions, 2 deletions

diff --git a/src/signal/aarch64/restore.s b/src/signal/aarch64/restore.s
index d3d0243d..d4e5fcf1 100644
--- a/src/signal/aarch64/restore.s
+++ b/src/signal/aarch64/restore.s
@@ -1,7 +1,9 @@
 .global __restore
+.hidden __restore
 .type __restore,%function
 __restore:
 .global __restore_rt
+.hidden __restore_rt
 .type __restore_rt,%function
 __restore_rt:
 	mov x8,#139 // SYS_rt_sigreturn
diff --git a/src/signal/arm/restore.s b/src/signal/arm/restore.s
index 22fb1a54..fb086d9b 100644
--- a/src/signal/arm/restore.s
+++ b/src/signal/arm/restore.s
@@ -1,12 +1,14 @@
 .syntax unified
 
 .global __restore
+.hidden __restore
 .type __restore,%function
 __restore:
 	mov r7,#119
 	swi 0x0
 
 .global __restore_rt
+.hidden __restore_rt
 .type __restore_rt,%function
 __restore_rt:
 	mov r7,#173
diff --git a/src/signal/i386/restore.s b/src/signal/i386/restore.s
index a30b69c4..ccc94307 100644
--- a/src/signal/i386/restore.s
+++ b/src/signal/i386/restore.s
@@ -1,4 +1,5 @@
 .global __restore
+.hidden __restore
 .type __restore,@function
 __restore:
 	popl %eax
@@ -6,6 +7,7 @@ __restore:
 	int $0x80
 
 .global __restore_rt
+.hidden __restore_rt
 .type __restore_rt,@function
 __restore_rt:
 	movl $173, %eax
diff --git a/src/signal/microblaze/restore.s b/src/signal/microblaze/restore.s
index fe4f5a09..b3c9f57b 100644
--- a/src/signal/microblaze/restore.s
+++ b/src/signal/microblaze/restore.s
@@ -1,10 +1,12 @@
 .global __restore
+.hidden __restore
 .type __restore,@function
 __restore:
 	ori     r12, r0, 119
 	brki    r14, 0x8
 
 .global __restore_rt
+.hidden __restore_rt
 .type __restore_rt,@function
 __restore_rt:
 	ori     r12, r0, 173
diff --git a/src/signal/mips/restore.s b/src/signal/mips/restore.s
index 5c22dd48..b6dadce0 100644
--- a/src/signal/mips/restore.s
+++ b/src/signal/mips/restore.s
@@ -1,12 +1,14 @@
 .set noreorder
 
 .global __restore_rt
+.hidden __restore_rt
 .type   __restore_rt,@function
 __restore_rt:
 	li $2, 4193
 	syscall
 
 .global __restore
+.hidden __restore
 .type   __restore,@function
 __restore:
 	li $2, 4119
diff --git a/src/signal/mips64/restore.s b/src/signal/mips64/restore.s
index e8988369..401f8e73 100644
--- a/src/signal/mips64/restore.s
+++ b/src/signal/mips64/restore.s
@@ -1,6 +1,8 @@
 .set	noreorder
 .global	__restore_rt
 .global	__restore
+.hidden __restore_rt
+.hidden __restore
 .type	__restore_rt,@function
 .type	__restore,@function
 __restore_rt:
diff --git a/src/signal/mipsn32/restore.s b/src/signal/mipsn32/restore.s
index 0d1c1c5e..4cd4e1b4 100644
--- a/src/signal/mipsn32/restore.s
+++ b/src/signal/mipsn32/restore.s
@@ -1,6 +1,8 @@
 .set	noreorder
 .global	__restore_rt
 .global	__restore
+.hidden __restore_rt
+.hidden __restore
 .type	__restore_rt,@function
 .type	__restore,@function
 __restore_rt:
diff --git a/src/signal/powerpc/restore.s b/src/signal/powerpc/restore.s
index 4d41c27a..29c8afd0 100644
--- a/src/signal/powerpc/restore.s
+++ b/src/signal/powerpc/restore.s
@@ -1,10 +1,12 @@
 	.global __restore
+	.hidden __restore
 	.type __restore,%function
 __restore:
 	li      0, 119 #__NR_sigreturn
 	sc
 
 	.global __restore_rt
+	.hidden __restore_rt
 	.type __restore_rt,%function
 __restore_rt:
 	li      0, 172 # __NR_rt_sigreturn
diff --git a/src/signal/powerpc64/restore.s b/src/signal/powerpc64/restore.s
index 4d41c27a..29c8afd0 100644
--- a/src/signal/powerpc64/restore.s
+++ b/src/signal/powerpc64/restore.s
@@ -1,10 +1,12 @@
 	.global __restore
+	.hidden __restore
 	.type __restore,%function
 __restore:
 	li      0, 119 #__NR_sigreturn
 	sc
 
 	.global __restore_rt
+	.hidden __restore_rt
 	.type __restore_rt,%function
 __restore_rt:
 	li      0, 172 # __NR_rt_sigreturn
diff --git a/src/signal/restore.c b/src/signal/restore.c
index 873b867e..5ec4f5dd 100644
--- a/src/signal/restore.c
+++ b/src/signal/restore.c
@@ -1,10 +1,12 @@
+#include <features.h>
+
 /* These functions will not work, but suffice for targets where the
  * kernel sigaction structure does not actually use sa_restorer. */
 
-void __restore()
+hidden void __restore()
 {
 }
 
-void __restore_rt()
+hidden void __restore_rt()
 {
 }
diff --git a/src/signal/s390x/restore.s b/src/signal/s390x/restore.s
index 79beb68f..88e33dbc 100644
--- a/src/signal/s390x/restore.s
+++ b/src/signal/s390x/restore.s
@@ -1,9 +1,11 @@
 	.global __restore
+	.hidden __restore
 	.type __restore,%function
 __restore:
 	svc 119 #__NR_sigreturn
 
 	.global __restore_rt
+	.hidden __restore_rt
 	.type __restore_rt,%function
 __restore_rt:
 	svc 173 # __NR_rt_sigreturn
diff --git a/src/signal/sh/restore.s b/src/signal/sh/restore.s
index d5df8e14..3a92199d 100644
--- a/src/signal/sh/restore.s
+++ b/src/signal/sh/restore.s
@@ -1,4 +1,5 @@
 .global __restore
+.hidden __restore
 __restore:
 	mov   #119, r3  !__NR_sigreturn
 	trapa #31
@@ -10,6 +11,7 @@ __restore:
 	or    r0, r0
 
 .global __restore_rt
+.hidden __restore_rt
 __restore_rt:
 	mov   #100, r3  !__NR_rt_sigreturn
 	add   #73, r3
diff --git a/src/signal/x32/restore.s b/src/signal/x32/restore.s
index 2f06e787..1117446a 100644
--- a/src/signal/x32/restore.s
+++ b/src/signal/x32/restore.s
@@ -1,5 +1,6 @@
 	nop
 .global __restore_rt
+.hidden __restore_rt
 .type __restore_rt,@function
 __restore_rt:
 	mov $0x40000201, %rax /* SYS_rt_sigreturn */
diff --git a/src/signal/x86_64/restore.s b/src/signal/x86_64/restore.s
index b5c6e37f..27d6cf31 100644
--- a/src/signal/x86_64/restore.s
+++ b/src/signal/x86_64/restore.s
@@ -1,5 +1,6 @@
 	nop
 .global __restore_rt
+.hidden __restore_rt
 .type __restore_rt,@function
 __restore_rt:
 	mov $15, %rax