1 files changed, 63 insertions, 0 deletions
diff --git a/src/third_party/unwind/dist/src/arm/getcontext.S b/src/third_party/unwind/dist/src/arm/getcontext.S
new file mode 100644
index 00000000000..7e18784477d
--- /dev/null
+++ b/src/third_party/unwind/dist/src/arm/getcontext.S
@@ -0,0 +1,63 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "offsets.h"
+
+	.text
+	.arm
+
+	.global _Uarm_getcontext
+	.type	_Uarm_getcontext, %function
+	@ This is a stub version of getcontext() for ARM which only stores core
+	@ registers.  It must be called in a special way, not as a regular
+	@ function -- see also the libunwind-arm.h:unw_tdep_getcontext macro.
+_Uarm_getcontext:
+	stmfd sp!, {r0, r1}
+	@ store r0
+#if defined(__linux__)
+	str r0, [r0, #LINUX_UC_MCONTEXT_OFF + LINUX_SC_R0_OFF]
+	add r0, r0, #LINUX_UC_MCONTEXT_OFF + LINUX_SC_R0_OFF
+#elif defined(__FreeBSD__)
+	str r0, [r0, #FREEBSD_UC_MCONTEXT_OFF + FREEBSD_MC_R0_OFF]
+	add r0, r0, #FREEBSD_UC_MCONTEXT_OFF + FREEBSD_MC_R0_OFF
+#else
+#error Fix me
+#endif
+	@ store r1 to r12
+	stmib r0, {r1-r12}
+	@ reconstruct r13 at call site, then store
+	add r1, sp, #12
+	str r1, [r0, #13 * 4]
+	@ retrieve r14 from call site, then store
+	ldr r1, [sp, #8]
+	str r1, [r0, #14 * 4]
+	@ point lr to instruction after call site's stack adjustment
+	add r1, lr, #4
+	str r1, [r0, #15 * 4]
+	ldmfd sp!, {r0, r1}
+	bx lr
+#if defined(__linux__) || defined(__FreeBSD__)
+ /* We do not need executable stack.  */
+ .section  .note.GNU-stack,"",%progbits
+#endif