1 files changed, 126 insertions, 0 deletions
diff --git a/src/mapi/entry_x86-64_tls.h b/src/mapi/entry_x86-64_tls.h
new file mode 100644
index 00000000000..72d4125a694
--- /dev/null
+++ b/src/mapi/entry_x86-64_tls.h
@@ -0,0 +1,126 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  7.9
+ *
+ * Copyright (C) 2010 LunarG Inc.
+ *
+ * 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.
+ *
+ * Authors:
+ *    Chia-I Wu <[email protected]>
+ */
+
+#include "u_macros.h"
+
+#ifdef __linux__
+__asm__(".section .note.ABI-tag, \"a\"\n\t"
+        ".p2align 2\n\t"
+        ".long 1f - 0f\n\t"      /* name length */
+        ".long 3f - 2f\n\t"      /* data length */
+        ".long 1\n\t"            /* note length */
+        "0: .asciz \"GNU\"\n\t"  /* vendor name */
+        "1: .p2align 2\n\t"
+        "2: .long 0\n\t"         /* note data: the ABI tag */
+        ".long 2,4,20\n\t"       /* Minimum kernel version w/TLS */
+        "3: .p2align 2\n\t");    /* pad out section */
+#endif /* __linux__ */
+
+__asm__(".text\n"
+        ".balign 32\n"
+        "x86_64_entry_start:");
+
+#define STUB_ASM_ENTRY(func)                             \
+   ".globl " func "\n"                                   \
+   ".type " func ", @function\n"                         \
+   ".balign 32\n"                                        \
+   func ":"
+
+#define STUB_ASM_CODE(slot)                              \
+   "movq " ENTRY_CURRENT_TABLE "@GOTTPOFF(%rip), %rax\n\t"  \
+   "movq %fs:(%rax), %r11\n\t"                           \
+   "jmp *(8 * " slot ")(%r11)"
+
+#define MAPI_TMP_STUB_ASM_GCC
+#include "mapi_tmp.h"
+
+#ifndef MAPI_MODE_BRIDGE
+
+__asm__("x86_64_current_tls:\n\t"
+	"movq " ENTRY_CURRENT_TABLE "@GOTTPOFF(%rip), %rax\n\t"
+	"ret");
+
+extern unsigned long
+x86_64_current_tls();
+
+#include <string.h>
+#include "u_execmem.h"
+
+void
+entry_patch_public(void)
+{
+}
+
+static char
+x86_64_entry_start[];
+
+mapi_func
+entry_get_public(int slot)
+{
+   return (mapi_func) (x86_64_entry_start + slot * 32);
+}
+
+void
+entry_patch(mapi_func entry, int slot)
+{
+   char *code = (char *) entry;
+   *((unsigned int *) (code + 12)) = slot * sizeof(mapi_func);
+}
+
+mapi_func
+entry_generate(int slot)
+{
+   const char code_templ[16] = {
+      /* movq %fs:0, %r11 */
+      0x64, 0x4c, 0x8b, 0x1c, 0x25, 0x00, 0x00, 0x00, 0x00,
+      /* jmp *0x1234(%r11) */
+      0x41, 0xff, 0xa3, 0x34, 0x12, 0x00, 0x00,
+   };
+   unsigned long addr;
+   void *code;
+   mapi_func entry;
+
+   addr = x86_64_current_tls();
+   if ((addr >> 32) != 0xffffffff)
+      return NULL;
+   addr &= 0xffffffff;
+
+   code = u_execmem_alloc(sizeof(code_templ));
+   if (!code)
+      return NULL;
+
+   memcpy(code, code_templ, sizeof(code_templ));
+
+   *((unsigned int *) (code + 5)) = addr;
+   entry = (mapi_func) code;
+   entry_patch(entry, slot);
+
+   return entry;
+}
+
+#endif /* MAPI_MODE_BRIDGE */