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* Mesa 3-D graphics library
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* Copyright (C) 2010 LunarG Inc.
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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* Chia-I Wu <olv@lunarg.com>
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#include "u_execmem.h"
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__asm__("x86_64_current_tls:\n\t"
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"movq u_current_table_tls@GOTTPOFF(%rip), %rax\n\t"
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#define STUB_ASM_ENTRY(func) \
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".type " func ", @function\n" \
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#define STUB_ASM_CODE(slot) \
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"movq u_current_table_tls@GOTTPOFF(%rip), %rax\n\t" \
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"movq %fs:(%rax), %r11\n\t" \
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"jmp *(8 * " slot ")(%r11)"
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#define MAPI_TMP_STUB_ASM_GCC
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entry_patch_public(void)
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entry_patch(mapi_func entry, int slot)
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void *code = (void *) entry;
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*((unsigned int *) (code + 12)) = slot * sizeof(mapi_func);
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entry_generate(int slot)
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const char code_templ[16] = {
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/* movq %fs:0, %r11 */
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0x64, 0x4c, 0x8b, 0x1c, 0x25, 0x00, 0x00, 0x00, 0x00,
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/* jmp *0x1234(%r11) */
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0x41, 0xff, 0xa3, 0x34, 0x12, 0x00, 0x00,
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addr = x86_64_current_tls();
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if ((addr >> 32) != 0xffffffff)
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code = u_execmem_alloc(sizeof(code_templ));
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memcpy(code, code_templ, sizeof(code_templ));
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*((unsigned int *) (code + 5)) = addr;
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entry = (mapi_func) code;
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entry_patch(entry, slot);