xref: /aosp_15_r20/external/mesa3d/src/mapi/entry_ppc64le_tls.h (revision 6104692788411f58d303aa86923a9ff6ecaded22)
1 /*
2  * Mesa 3-D graphics library
3  *
4  * Copyright (C) 2017 Red Hat
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining a
7  * copy of this software and associated documentation files (the "Software"),
8  * to deal in the Software without restriction, including without limitation
9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10  * and/or sell copies of the Software, and to permit persons to whom the
11  * Software is furnished to do so, subject to the following conditions:
12  *
13  * The above copyright notice and this permission notice shall be included
14  * in all copies or substantial portions of the Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22  * DEALINGS IN THE SOFTWARE.
23  *
24  * Authors:
25  *    Ben Crocker <[email protected]>
26  */
27 
28 #ifdef HAVE_FUNC_ATTRIBUTE_VISIBILITY
29 #define HIDDEN __attribute__((visibility("hidden")))
30 #else
31 #define HIDDEN
32 #endif
33 
34 // NOTE: These must be powers of two:
35 #define PPC64LE_ENTRY_SIZE 64
36 #define PPC64LE_PAGE_ALIGN 65536
37 #if ((PPC64LE_ENTRY_SIZE & (PPC64LE_ENTRY_SIZE - 1)) != 0)
38 #error PPC64LE_ENTRY_SIZE must be a power of two!
39 #endif
40 #if ((PPC64LE_PAGE_ALIGN & (PPC64LE_PAGE_ALIGN - 1)) != 0)
41 #error PPC64LE_PAGE_ALIGN must be a power of two!
42 #endif
43 
44 __asm__(".text\n"
45         ".balign " U_STRINGIFY(PPC64LE_ENTRY_SIZE) "\n"
46         "ppc64le_entry_start:");
47 
48 #define STUB_ASM_ENTRY(func)                            \
49    ".globl " func "\n"                                  \
50    ".type " func ", @function\n"                        \
51    ".balign " U_STRINGIFY(PPC64LE_ENTRY_SIZE) "\n"        \
52    func ":\n\t"                                         \
53    "  addis  2, 12, .TOC.-" func "@ha\n\t"              \
54    "  addi   2, 2, .TOC.-" func "@l\n\t"                \
55    "  .localentry  " func ", .-" func "\n\t"
56 
57 #define STUB_ASM_CODE(slot)                                     \
58    "  addis  11, 2, _glapi_tls_Dispatch@got@tprel@ha\n\t"   \
59    "  ld     11, _glapi_tls_Dispatch@got@tprel@l(11)\n\t"   \
60    "  add    11, 11,_glapi_tls_Dispatch@tls\n\t"            \
61    "  ld     11, 0(11)\n\t"                                     \
62    "  ld     12, " slot "*8(11)\n\t"                            \
63    "  mtctr  12\n\t"                                            \
64    "  bctr\n"                                                   \
65 
66 #define MAPI_TMP_STUB_ASM_GCC
67 #include "mapi_tmp.h"
68 
69 #ifndef MAPI_MODE_BRIDGE
70 
71 #include <string.h>
72 
73 void
entry_patch_public(void)74 entry_patch_public(void)
75 {
76 }
77 
78 extern char
79 ppc64le_entry_start[] HIDDEN;
80 
81 mapi_func
entry_get_public(int slot)82 entry_get_public(int slot)
83 {
84    return (mapi_func) (ppc64le_entry_start + slot * PPC64LE_ENTRY_SIZE);
85 }
86 
87 #endif /* MAPI_MODE_BRIDGE */
88