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From cf6382643efd133e617c2cf1dba7e53868ccd690 Mon Sep 17 00:00:00 2001
From: Christopher Ferris <cferris@google.com>
Date: Tue, 15 Apr 2014 11:12:03 -0700
Subject: [PATCH] Add aarch64 getcontext functionality.
Change-Id: I32912a85c0fd02bb5e45a9eb7deb2410ded352a9
---
include/libunwind-aarch64.h | 27 +++++++++++++++++++++++++--
1 file changed, 25 insertions(+), 2 deletions(-)
diff --git a/include/libunwind-aarch64.h b/include/libunwind-aarch64.h
index cd01e57..fe9e83d 100644
--- a/include/libunwind-aarch64.h
+++ b/include/libunwind-aarch64.h
@@ -175,8 +175,31 @@ typedef ucontext_t unw_tdep_context_t;
#include "libunwind-common.h"
#include "libunwind-dynamic.h"
-#define unw_tdep_getcontext(uc) (getcontext (uc), 0)
-#define unw_tdep_is_fpreg UNW_ARCH_OBJ(is_fpreg)
+#define unw_tdep_getcontext(uc) (({ \
+ unw_tdep_context_t *unw_ctx = (uc); \
+ register uint64_t *unw_base asm ("x0") = (uint64_t*) unw_ctx->uc_mcontext.regs; \
+ __asm__ __volatile__ ( \
+ "stp x0, x1, [%[base], #0]\n" \
+ "stp x2, x3, [%[base], #16]\n" \
+ "stp x4, x5, [%[base], #32]\n" \
+ "stp x6, x7, [%[base], #48]\n" \
+ "stp x8, x9, [%[base], #64]\n" \
+ "stp x10, x11, [%[base], #80]\n" \
+ "stp x12, x13, [%[base], #96]\n" \
+ "stp x14, x13, [%[base], #112]\n" \
+ "stp x16, x17, [%[base], #128]\n" \
+ "stp x18, x19, [%[base], #144]\n" \
+ "stp x20, x21, [%[base], #160]\n" \
+ "stp x22, x23, [%[base], #176]\n" \
+ "stp x24, x25, [%[base], #192]\n" \
+ "stp x26, x27, [%[base], #208]\n" \
+ "stp x28, x29, [%[base], #224]\n" \
+ "str x30, [%[base], #240]\n" \
+ "mov x1, sp\n" \
+ "stp x1, x30, [%[base], #248]\n" \
+ : [base] "+r" (unw_base) : : "x1", "memory"); \
+ }), 0)
+#define unw_tdep_is_fpreg UNW_ARCH_OBJ(is_fpreg)
extern int unw_tdep_is_fpreg (int);
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