From b78fc95424b5f0fb28246e8c61bb8b4d6a9d733a Mon Sep 17 00:00:00 2001
From: Henning Heinold <h.heinold@tarent.de>
Date: Mon, 12 Jul 2010 13:29:16 +0200
Subject: openjdk: backport from openembedded-dev

Acked-by: Stefan Schmidt <stefan@buglabs.net>
Acked-by: Koen Kooi <koen@openembedded.org>
Acked-by: Marcin Juszkiewicz <marcin@juszkiewicz.com.pl>
---
 .../shark-arm-linux-cpu-detection.patch            | 112 +++++++++++++++++++++
 1 file changed, 112 insertions(+)
 create mode 100644 recipes/openjdk/openjdk-6-6b18-1.8/shark-arm-linux-cpu-detection.patch

(limited to 'recipes/openjdk/openjdk-6-6b18-1.8/shark-arm-linux-cpu-detection.patch')

diff --git a/recipes/openjdk/openjdk-6-6b18-1.8/shark-arm-linux-cpu-detection.patch b/recipes/openjdk/openjdk-6-6b18-1.8/shark-arm-linux-cpu-detection.patch
new file mode 100644
index 0000000000..b4a635ee2a
--- /dev/null
+++ b/recipes/openjdk/openjdk-6-6b18-1.8/shark-arm-linux-cpu-detection.patch
@@ -0,0 +1,112 @@
+Index: icedtea6-1.8/ports/hotspot/src/share/vm/shark/sharkCompiler.cpp
+===================================================================
+--- icedtea6-1.8.orig/ports/hotspot/src/share/vm/shark/sharkCompiler.cpp	2010-07-14 16:42:48.412103129 +0200
++++ icedtea6-1.8/ports/hotspot/src/share/vm/shark/sharkCompiler.cpp	2010-07-14 16:50:51.680282178 +0200
+@@ -32,6 +32,95 @@
+ 
+ #if SHARK_LLVM_VERSION >= 27
+ namespace {
++
++#if defined(__arm__) && defined(__linux__)
++#include <fcntl.h>
++#include <linux/auxvec.h>
++#include <asm/hwcap.h>
++#define VECBUFF_SIZE 32
++
++bool TestARMLinuxHWCAP(int feature) {
++  int fd;
++  unsigned vecs[VECBUFF_SIZE];
++  unsigned *p;
++  int i, n;
++  int rc;
++
++  rc = 0;
++  fd = open("/proc/self/auxv", O_RDONLY);
++  if (fd < 0) return 0;
++  do {
++    n = read(fd, vecs, VECBUFF_SIZE * sizeof(unsigned));
++    p = vecs;
++    i = n/8;
++    while (--i >=0) {
++      unsigned tag = *p++;
++      unsigned value = *p++;
++      if (tag == 0) goto fini;
++      if(tag == AT_HWCAP && (value & feature)) {
++        rc = 1;
++        goto fini;
++      }
++    }
++  } while (n == VECBUFF_SIZE * sizeof(unsigned));
++fini:
++  close(fd);
++  return rc;
++}
++
++char* TestARMLinuxAT(int auxvec) {
++  int fd;
++  unsigned vecs[VECBUFF_SIZE];
++  unsigned *p;
++  int i, n;
++  char* rc;
++
++  rc = 0;
++  fd = open("/proc/self/auxv", O_RDONLY);
++  if (fd < 0) return 0;
++  do {
++    n = read(fd, vecs, VECBUFF_SIZE * sizeof(unsigned));
++    p = vecs;
++    i = n/8;
++    while (--i >=0) {
++      unsigned tag = *p++;
++      unsigned value = *p++;
++      if (tag == 0) goto fini;
++      if(tag == (unsigned) auxvec ) {
++        rc = (char*)value;
++        goto fini;
++      }
++    }
++  } while (n == VECBUFF_SIZE * sizeof(unsigned));
++fini:
++  close(fd);
++  return rc;
++}
++
++bool getARMHostCPUFeatures(StringMap<bool> &Features) {
++  // FIXME LLVM PR6561 // Features["neon"]=TestARMLinuxHWCAP(HWCAP_NEON);
++  // FIXME ARMv6t2 JIT is not yet supported // Features["thumb2"]=TestARMLinuxHWCAP(HWCAP_THUMBEE);
++  Features["vfp2"]=TestARMLinuxHWCAP(HWCAP_VFP);
++
++  std::string testArchKey(TestARMLinuxAT(AT_PLATFORM));
++
++  StringMap<std::string> archLinuxToLLVMMap;
++  archLinuxToLLVMMap["v4l"]="v4t";
++  archLinuxToLLVMMap["v5l"]="v5t";
++  archLinuxToLLVMMap["v6l"]="v6";
++  archLinuxToLLVMMap["v7l"]="v7a";
++
++  llvm::StringMapIterator<std::string> resultIterator(archLinuxToLLVMMap.find(
++                                                      testArchKey));
++  if(resultIterator->first()) {
++    std::string arch(resultIterator->second);
++    Features[arch]=true;
++  }
++
++  return true;
++}
++#endif
++
+   cl::opt<std::string>
+   MCPU("mcpu");
+ 
+@@ -64,7 +154,11 @@
+ #if SHARK_LLVM_VERSION >= 27
+   // Finetune LLVM for the current host CPU.
+   StringMap<bool> Features;
++#if defined(__arm__) && defined(__linux__)
++  bool gotCpuFeatures = getARMHostCPUFeatures(Features);
++#else
+   bool gotCpuFeatures = llvm::sys::getHostCPUFeatures(Features);
++#endif
+   std::string cpu("-mcpu=" + llvm::sys::getHostCPUName());
+ 
+   std::vector<const char*> args;
-- 
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