fix #1, merge from michaeltalyansky, support ARM

Author: winlinvip

README.md

@@ -13,7 +13,7 @@ The branch [srs](https://github.com/ossrs/state-threads/tree/srs) will be patche
 - [x] Patch [st.osx.kqueue.patch](https://github.com/ossrs/srs/blob/2.0release/trunk/3rdparty/patches/3.st.osx.kqueue.patch), for osx.
 - [x] Patch [st.disable.examples.patch](https://github.com/ossrs/srs/blob/2.0release/trunk/3rdparty/patches/4.st.disable.examples.patch), for ubuntu.
 - [x] [Refine TAB of code](https://github.com/ossrs/state-threads/compare/c2001d30ca58f55d72a6cc6b9b6c70391eaf14db...d2101b26988b0e0db0aabc53ddf452068c1e2cbc).
-- [ ] Merge from [michaeltalyansky](https://github.com/michaeltalyansky/state-threads), support [ARM](https://github.com/ossrs/state-threads/issues/1).
+- [x] Merge from [michaeltalyansky](https://github.com/michaeltalyansky/state-threads), support [ARM](https://github.com/ossrs/state-threads/issues/1).
 - [ ] Merge from [toffaletti](https://github.com/toffaletti/state-threads), support [valgrind](https://github.com/ossrs/state-threads/issues/2) for ST.
 
 ## Usage

md.h

@@ -422,7 +422,8 @@
             #define MD_STACK_GROWS_DOWN
 
             #if defined(__GLIBC__) && __GLIBC__ >= 2
-                #define MD_GET_SP(_t) (_t)->context[0].__jmpbuf[8] /*by SRS, 20=>8 for ARM*/
+                /* Merge from https://github.com/michaeltalyansky/state-threads/commit/56554a5c425aee8e7a73782eae23d74d83c4120a */
+                #define MD_GET_SP(_t) (_t)->context[0].__jmpbuf[8]
             #else
                 #error "ARM/Linux pre-glibc2 not supported yet"
             #endif /* defined(__GLIBC__) && __GLIBC__ >= 2 */

sched.c

@@ -515,6 +515,15 @@ void st_thread_interrupt(_st_thread_t *thread)
 }
 
 
+/* Merge from https://github.com/michaeltalyansky/state-threads/commit/cce736426c2320ffec7c9820df49ee7a18ae638c */
+#if defined(__arm__)
+    extern unsigned long  __pointer_chk_guard;
+    #define PTR_MANGLE(var) \
+        (var) = (__typeof (var)) ((unsigned long) (var) ^ __pointer_chk_guard)
+    #define PTR_DEMANGLE(var)     PTR_MANGLE (var)
+#endif
+
+
 _st_thread_t *st_thread_create(void *(*start)(void *arg), void *arg, int joinable, int stk_size)
 {
     _st_thread_t *thread;
@@ -585,7 +594,15 @@ _st_thread_t *st_thread_create(void *(*start)(void *arg), void *arg, int joinabl
     thread->arg = arg;
 
 #ifndef __ia64__
-    _ST_INIT_CONTEXT(thread, stack->sp, _st_thread_main);
+    /* Merge from https://github.com/michaeltalyansky/state-threads/commit/cce736426c2320ffec7c9820df49ee7a18ae638c */
+    #if defined(__arm__)
+        volatile void * lsp = PTR_MANGLE(stack->sp);
+        if (_setjmp ((thread)->context))
+            _st_thread_main();
+        (thread)->context[0].__jmpbuf[8] = (long) (lsp);
+    #else
+        _ST_INIT_CONTEXT(thread, stack->sp, _st_thread_main);
+    #endif
 #else
     _ST_INIT_CONTEXT(thread, stack->sp, stack->bsp, _st_thread_main);
 #endif