Add setjmp and longjmp functions for nuttx-stm32f4 target. (#1743)

JerryScript-DCO-1.0-Signed-off-by: Robert Sipka rsipka.uszeged@partner.samsung.com
2017-04-19 00:10:05 +02:00
parent 9cbd5e78ad
commit 8d99e73db3
4 changed files with 91 additions and 26 deletions
@@ -0,0 +1,65 @@
+/* Copyright JS Foundation and other contributors, http://js.foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+.syntax unified
+
+.macro func _name
+.global \_name
+.type \_name, %function
+\_name:
+.endm
+.macro endfunc _name
+.size \_name, .-\_name
+.endm
+
+/**
+ * setjmp (jmp_buf env)
+ *
+ * See also:
+ *          longjmp
+ *
+ * @return 0 - if returns from direct call,
+ *         nonzero - if returns after longjmp.
+ */
+func setjmp
+  stmia r0!, {r4 - r11, lr}
+  str sp, [r0], #4
+  vstm r0, {s16 - s31}
+  mov r0, #0
+  bx lr
+endfunc setjmp
+
+/**
+ * longjmp (jmp_buf env, int val)
+ *
+ * Note:
+ *      if val is not 0, then it would be returned from setjmp,
+ *      otherwise - 0 would be returned.
+ *
+ * See also:
+ *          setjmp
+ */
+func longjmp
+  ldmia r0!, {r4 - r11, lr}
+  ldr sp, [r0]
+  add r0, r0, #4
+  vldm r0, {s16 - s31}
+  mov r0, r1
+  cmp r0, #0
+  bne 1f
+  mov r0, #1
+  1:
+  bx lr
+endfunc longjmp