Changeset 8c66acc8 in rtems for cpukit/libdl/rtl-mdreloc-arm.c

Timestamp:

Jul 30, 2019, 10:43:15 AM (2 years ago)

Author:

Chris Johns <chrisj@…>

Branches:

5, master

Children:

cc91fae

Parents:

163927e5

git-author:

Chris Johns <chrisj@…> (07/30/19 10:43:15)

git-committer:

Chris Johns <chrisj@…> (08/04/19 02:32:50)

Message:

libdl/arm: Add support for ARM trampolines

Closes #3776

File:

• cpukit/libdl/rtl-mdreloc-arm.c (modified) (1 diff)

cpukit/libdl/rtl-mdreloc-arm.c

@@ -79 +79 @@
    * http://shell-storm.org/online/Online-Assembler-and-Disassembler/
    *
-   *  ldr.w pc, [pc]
+   *  Thumb mode:
+   *    ldr.w pc, [pc]
+   *
+   *  ARM mode:
+   *    ldr pc, [pc, #-4]
+   *
    */
   uint32_t* tramp = (uint32_t*) tramopline;
+#if defined(__thumb__)
+ #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
   *tramp++ = 0xf000f8df;
+ #else
+  *tramp++ = 0xf8dff000; /* not tested */
+ #endif
+#else
+ #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
+  *tramp++ = 0xe51ff004;
+ #else
+  *tramp++ = 0xe51ff004; /* not tested */
+ #endif
+#endif
   *tramp++ = (uint32_t) target;
   return tramp;