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authorChia-I Wu <olv@lunarg.com>2010-04-22 16:22:13 +0800
committerChia-I Wu <olv@lunarg.com>2010-05-07 10:41:12 +0800
commitde3994076ea673d71059c13dab78a327dd20896c (patch)
tree69af391590289fbc1cbd9eba8b6351fc0839fbd2
parent56eb5d7e852ab04b45ba09831e2c8fbadcda8c40 (diff)
mapi: Add x86-64 dispatcher.
-rw-r--r--src/mapi/mapi/entry.c2
-rw-r--r--src/mapi/mapi/entry_x86-64_tls.h97
2 files changed, 99 insertions, 0 deletions
diff --git a/src/mapi/mapi/entry.c b/src/mapi/mapi/entry.c
index 968aa44528..fdf2a89c52 100644
--- a/src/mapi/mapi/entry.c
+++ b/src/mapi/mapi/entry.c
@@ -34,6 +34,8 @@
# else
# include "entry_x86_tsd.h"
# endif
+#elif defined(USE_X86_64_ASM) && defined(__GNUC__) && defined(GLX_USE_TLS)
+# include "entry_x86-64_tls.h"
#else
#include <stdlib.h>
diff --git a/src/mapi/mapi/entry_x86-64_tls.h b/src/mapi/mapi/entry_x86-64_tls.h
new file mode 100644
index 0000000000..d4c9907b89
--- /dev/null
+++ b/src/mapi/mapi/entry_x86-64_tls.h
@@ -0,0 +1,97 @@
+/*
+ * 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 <olv@lunarg.com>
+ */
+
+#include <string.h>
+#include "u_execmem.h"
+#include "u_macros.h"
+
+__asm__(".text");
+
+__asm__("x86_64_current_tls:\n\t"
+ "movq _glapi_tls_Dispatch@GOTTPOFF(%rip), %rax\n\t"
+ "ret");
+
+#define STUB_ASM_ENTRY(func) \
+ ".globl " func "\n" \
+ ".type " func ", @function\n" \
+ ".balign 32\n" \
+ func ":"
+
+#define STUB_ASM_CODE(slot) \
+ "movq _glapi_tls_Dispatch@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"
+
+extern unsigned long
+x86_64_current_tls();
+
+void
+entry_patch_public(void)
+{
+}
+
+void
+entry_patch(mapi_func entry, int slot)
+{
+ void *code = (void *) 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;
+}