summaryrefslogtreecommitdiff
path: root/libc/sysdeps/linux
diff options
context:
space:
mode:
Diffstat (limited to 'libc/sysdeps/linux')
-rw-r--r--libc/sysdeps/linux/common/pause.c1
-rw-r--r--libc/sysdeps/linux/sh/sysdep.h21
2 files changed, 21 insertions, 1 deletions
diff --git a/libc/sysdeps/linux/common/pause.c b/libc/sysdeps/linux/common/pause.c
index cd0ea4a77..132ffa856 100644
--- a/libc/sysdeps/linux/common/pause.c
+++ b/libc/sysdeps/linux/common/pause.c
@@ -37,3 +37,4 @@ weak_alias (__libc_pause, pause)
#ifdef __UCLIBC_HAS_THREADS_NATIVE__
LIBC_CANCEL_HANDLED (); /* sigsuspend handles our cancellation. */
#endif
+
diff --git a/libc/sysdeps/linux/sh/sysdep.h b/libc/sysdeps/linux/sh/sysdep.h
index 1d490553d..bd6234292 100644
--- a/libc/sysdeps/linux/sh/sysdep.h
+++ b/libc/sysdeps/linux/sh/sysdep.h
@@ -273,5 +273,24 @@
.align 2; \
1: .long SYS_ify (syscall_name); \
2:
-
#endif /* __ASSEMBLER__ */
+
+/* Pointer mangling support. */
+#if defined NOT_IN_libc && defined IS_IN_rtld
+/* We cannot use the thread descriptor because in ld.so we use setjmp
+ earlier than the descriptor is initialized. Using a global variable
+ is too complicated here since we have no PC-relative addressing mode. */
+#else
+# ifdef __ASSEMBLER__
+# define PTR_MANGLE(reg, tmp) \
+ stc gbr,tmp; mov.l @(POINTER_GUARD,tmp),tmp; xor tmp,reg
+# define PTR_MANGLE2(reg, tmp) xor tmp,reg
+# define PTR_DEMANGLE(reg, tmp) PTR_MANGLE (reg, tmp)
+# define PTR_DEMANGLE2(reg, tmp) PTR_MANGLE2 (reg, tmp)
+# else
+# define PTR_MANGLE(var) \
+ (var) = (void *) ((uintptr_t) (var) ^ THREAD_GET_POINTER_GUARD ())
+# define PTR_DEMANGLE(var) PTR_MANGLE (var)
+# endif
+#endif
+