First set of licensing changes

[mono.git] / mono / mini / mini-arm-tls.S

diff --git a/mono/mini/mini-arm-tls.S b/mono/mini/mini-arm-tls.S
index f4e8db7feec28a3e4fe0cb2f4286f6651082d5fe..47a6dbb5ba2fda5c38e2923c67edefd4f4f5635c 100644 (file)
--- a/mono/mini/mini-arm-tls.S
+++ b/mono/mini/mini-arm-tls.S
@@ -2,6 +2,7 @@
  * mini-arm-tls.S: tls getters and setters for arm platforms
  *
  * Copyright 2015 Xamarin, Inc.
+        * Licensed under the MIT license. See LICENSE file in the project root for full license information.
  */
 
 #include <config.h>
@@ -14,6 +15,16 @@
         * within can be tracked. The tls value is returned in R0.
         */
 
+.macro DECLARE_GLOBAL_SYMBOL name
+#ifdef TARGET_MACH
+       .global _\name
+_\name:
+#else
+       .global \name
+\name:
+#endif
+.endm
+
        .text
 /* no .arch on clang. it only supports armv6+ anyway */
 #ifndef TARGET_MACH
@@ -21,13 +32,8 @@
 #endif
        .arm
        .align 4
-#ifdef TARGET_MACH
-       .global _mono_fast_get_tls_key
-_mono_fast_get_tls_key :
-#else
-       .global mono_fast_get_tls_key
-mono_fast_get_tls_key :
-#endif
+
+DECLARE_GLOBAL_SYMBOL mono_fast_get_tls_key
 #if defined(__linux__)
        mrc     p15, 0, r1, c13, c0, 3
 #if defined(HAVE_KW_THREAD)
@@ -42,6 +48,7 @@ mono_fast_get_tls_key :
        ldr     r0, [r1, r0, lsl #2]
        bx      lr
 #endif
+DECLARE_GLOBAL_SYMBOL mono_fast_get_tls_key_end
 
        /*
         * The following thunks fetch the value corresponding to the key/offset
@@ -50,31 +57,23 @@ mono_fast_get_tls_key :
         */
 
        .align 4
-#ifdef TARGET_MACH
-       .global _mono_fallback_get_tls_key
-_mono_fallback_get_tls_key :
-#else
-       .global mono_fallback_get_tls_key
-mono_fallback_get_tls_key :
-#endif
-#if defined(__linux__)
-       mov     r1, r0
-       mvn     r0, #0xf000
-       sub     r0, r0, #31
+DECLARE_GLOBAL_SYMBOL mono_fallback_get_tls_key
+#if defined(__linux__) && defined(HAVE_KW_THREAD) && defined(__ARM_EABI__)
        push    {lr}
-       blx     r0
-#if defined(HAVE_KW_THREAD)
+       mov     r1, r0
+       bl      __aeabi_read_tp
        ldr     r0, [r0, r1]
-#elif defined(TARGET_ANDROID)
-       ldr     r0, [r0, r1, lsl #2]
-#endif
        pop     {pc}
 #elif defined(TARGET_IOS)
-       push    {lr}
+       push    {r7, lr}
+       mov     r7, sp
        bl      _pthread_getspecific
+       pop     {r7, pc}
+#elif defined(TARGET_ANDROID)
+       push    {lr}
+       bl      pthread_getspecific
        pop     {pc}
 #endif
-
        /*
         * The following thunks set the value corresponding to the key/offset
         * passed in R0. These thunks don't do jumps to external code so execution
@@ -82,13 +81,7 @@ mono_fallback_get_tls_key :
         */
 
        .align 4
-#ifdef TARGET_MACH
-       .global _mono_fast_set_tls_key
-_mono_fast_set_tls_key :
-#else
-       .global mono_fast_set_tls_key
-mono_fast_set_tls_key :
-#endif
+DECLARE_GLOBAL_SYMBOL mono_fast_set_tls_key
 #if defined(__linux__)
        mrc     p15, 0, r2, c13, c0, 3
 #if defined(HAVE_KW_THREAD)
@@ -103,6 +96,7 @@ mono_fast_set_tls_key :
        str     r1, [r2, r0, lsl #2]
        bx      lr
 #endif
+DECLARE_GLOBAL_SYMBOL mono_fast_set_tls_key_end
 
        /*
         * The following thunks set the value corresponding to the key/offset
@@ -111,30 +105,55 @@ mono_fast_set_tls_key :
         */
 
        .align 4
-#ifdef TARGET_MACH
-       .global _mono_fallback_set_tls_key
-_mono_fallback_set_tls_key :
-#else
-       .global mono_fallback_set_tls_key
-mono_fallback_set_tls_key :
-#endif
-#if defined(__linux__)
-       mov     r2, r0
-       mvn     r0, #0xf000
-       sub     r0, r0, #31
+DECLARE_GLOBAL_SYMBOL mono_fallback_set_tls_key
+#if defined(__linux__) && defined(HAVE_KW_THREAD) && defined(__ARM_EABI__)
        push    {lr}
-       blx     r0
-#if defined(HAVE_KW_THREAD)
+       mov     r2, r0
+       bl      __aeabi_read_tp
        str     r1, [r0, r2]
-#elif defined(TARGET_ANDROID)
-       str     r1, [r0, r2, lsl #2]
-#endif
        pop     {pc}
 #elif defined(TARGET_IOS)
-       push    {lr}
+       push    {r7, lr}
+       mov     r7, sp
        bl      _pthread_setspecific
+       pop     {r7, pc}
+#elif defined(TARGET_ANDROID)
+       push    {lr}
+       bl      pthread_setspecific
        pop     {pc}
 #endif
 
+
+       /* Additional tls getters/setters */
+
+#if defined(TARGET_ANDROID)
+       .align 4
+DECLARE_GLOBAL_SYMBOL mono_fast_get_tls_key2
+       bic     r0, r0, #0x80000000
+       mrc     15, 0, r1, cr13, cr0, #3
+       lsls    r0, r0, #3
+       ldr     r1, [r1, #4]
+       add     r0, r1
+       ldr     r0, [r0, #0x68]
+       bx      lr
+DECLARE_GLOBAL_SYMBOL mono_fast_get_tls_key2_end
+
+       /*
+        * In order to use this fast setter we need to make sure that the key was
+        * already set at least once using the pthread api, otherwise it will not
+        * interwork with the api.
+        */
+       .align 4
+DECLARE_GLOBAL_SYMBOL mono_fast_set_tls_key2
+       bic     r0, r0, #0x80000000
+       mrc     15, 0, r2, cr13, cr0, #3
+       lsls    r0, r0, #3
+       ldr     r2, [r2, #4]
+       add     r0, r2
+       str     r1, [r0, #0x68]
+       bx      lr
+DECLARE_GLOBAL_SYMBOL mono_fast_set_tls_key2_end
+#endif
+
 #endif