| /* |
| * Mesa 3-D graphics library |
| * |
| * Copyright (C) 2017 Red Hat |
| * |
| * 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: |
| * Ben Crocker <bcrocker@redhat.com> |
| */ |
| |
| #ifdef HAVE_FUNC_ATTRIBUTE_VISIBILITY |
| #define HIDDEN __attribute__((visibility("hidden"))) |
| #else |
| #define HIDDEN |
| #endif |
| |
| // NOTE: These must be powers of two: |
| #define PPC64LE_ENTRY_SIZE 256 |
| #define PPC64LE_PAGE_ALIGN 65536 |
| #if ((PPC64LE_ENTRY_SIZE & (PPC64LE_ENTRY_SIZE - 1)) != 0) |
| #error PPC64LE_ENTRY_SIZE must be a power of two! |
| #endif |
| #if ((PPC64LE_PAGE_ALIGN & (PPC64LE_PAGE_ALIGN - 1)) != 0) |
| #error PPC64LE_PAGE_ALIGN must be a power of two! |
| #endif |
| |
| __asm__(".text\n" |
| ".balign " U_STRINGIFY(PPC64LE_ENTRY_SIZE) "\n" |
| "ppc64le_entry_start:"); |
| |
| #define STUB_ASM_ENTRY(func) \ |
| ".globl " func "\n" \ |
| ".type " func ", @function\n" \ |
| ".balign " U_STRINGIFY(PPC64LE_ENTRY_SIZE) "\n" \ |
| func ":\n\t" \ |
| " addis 2, 12, .TOC.-" func "@ha\n\t" \ |
| " addi 2, 2, .TOC.-" func "@l\n\t" \ |
| " .localentry " func ", .-" func "\n\t" |
| |
| #define STUB_ASM_CODE(slot) \ |
| " addis 11, 2, " ENTRY_CURRENT_TABLE "@got@ha\n\t" \ |
| " ld 11, " ENTRY_CURRENT_TABLE "@got@l(11)\n\t" \ |
| " ld 11, 0(11)\n\t" \ |
| " cmpldi 11, 0\n\t" \ |
| " beq 2000f\n" \ |
| "1050:\n\t" \ |
| " ld 12, " slot "*8(11)\n\t" \ |
| " mtctr 12\n\t" \ |
| " bctr\n" \ |
| "2000:\n\t" \ |
| " mflr 0\n\t" \ |
| " std 0, 16(1)\n\t" \ |
| " std 2, 40(1)\n\t" \ |
| " stdu 1, -144(1)\n\t" \ |
| " std 3, 56(1)\n\t" \ |
| " std 4, 64(1)\n\t" \ |
| " std 5, 72(1)\n\t" \ |
| " std 6, 80(1)\n\t" \ |
| " std 7, 88(1)\n\t" \ |
| " std 8, 96(1)\n\t" \ |
| " std 9, 104(1)\n\t" \ |
| " std 10, 112(1)\n\t" \ |
| " std 12, 128(1)\n\t" \ |
| " addis 12, 2, " ENTRY_CURRENT_TABLE_GET "@got@ha\n\t" \ |
| " ld 12, " ENTRY_CURRENT_TABLE_GET "@got@l(12)\n\t" \ |
| " mtctr 12\n\t" \ |
| " bctrl\n\t" \ |
| " ld 2, 144+40(1)\n\t" \ |
| " mr 11, 3\n\t" \ |
| " ld 3, 56(1)\n\t" \ |
| " ld 4, 64(1)\n\t" \ |
| " ld 5, 72(1)\n\t" \ |
| " ld 6, 80(1)\n\t" \ |
| " ld 7, 88(1)\n\t" \ |
| " ld 8, 96(1)\n\t" \ |
| " ld 9, 104(1)\n\t" \ |
| " ld 10, 112(1)\n\t" \ |
| " ld 12, 128(1)\n\t" \ |
| " addi 1, 1, 144\n\t" \ |
| " ld 0, 16(1)\n\t" \ |
| " mtlr 0\n\t" \ |
| " b 1050b\n" |
| |
| #define MAPI_TMP_STUB_ASM_GCC |
| #include "mapi_tmp.h" |
| |
| #ifndef MAPI_MODE_BRIDGE |
| |
| #include <string.h> |
| #include "u_execmem.h" |
| |
| void |
| entry_patch_public(void) |
| { |
| } |
| |
| extern char |
| ppc64le_entry_start[] HIDDEN; |
| |
| mapi_func |
| entry_get_public(int slot) |
| { |
| return (mapi_func) (ppc64le_entry_start + slot * PPC64LE_ENTRY_SIZE); |
| } |
| |
| static const uint32_t code_templ[] = { |
| // This should be functionally the same code as would be generated from |
| // the STUB_ASM_CODE macro, but defined as a buffer. |
| // This is used to generate new dispatch stubs. Mesa will copy this |
| // data to the dispatch stub, and then it will patch the slot number and |
| // any addresses that it needs to. |
| // NOTE!!! NOTE!!! NOTE!!! |
| // This representation is correct for both little- and big-endian systems. |
| // However, more work needs to be done for big-endian Linux because it |
| // adheres to an older, AIX-compatible ABI that uses function descriptors. |
| // 1000: |
| 0x7C0802A6, // <ENTRY+000>: mflr 0 |
| 0xF8010010, // <ENTRY+004>: std 0, 16(1) |
| 0xE96C0098, // <ENTRY+008>: ld 11, 9000f-1000b+0(12) |
| 0xE96B0000, // <ENTRY+012>: ld 11, 0(11) |
| 0x282B0000, // <ENTRY+016>: cmpldi 11, 0 |
| 0x41820014, // <ENTRY+020>: beq 2000f |
| // 1050: |
| 0xE80C00A8, // <ENTRY+024>: ld 0, 9000f-1000b+16(12) |
| 0x7D8B002A, // <ENTRY+028>: ldx 12, 11, 0 |
| 0x7D8903A6, // <ENTRY+032>: mtctr 12 |
| 0x4E800420, // <ENTRY+036>: bctr |
| // 2000: |
| 0xF8410028, // <ENTRY+040>: std 2, 40(1) |
| 0xF821FF71, // <ENTRY+044>: stdu 1, -144(1) |
| 0xF8610038, // <ENTRY+048>: std 3, 56(1) |
| 0xF8810040, // <ENTRY+052>: std 4, 64(1) |
| 0xF8A10048, // <ENTRY+056>: std 5, 72(1) |
| 0xF8C10050, // <ENTRY+060>: std 6, 80(1) |
| 0xF8E10058, // <ENTRY+064>: std 7, 88(1) |
| 0xF9010060, // <ENTRY+068>: std 8, 96(1) |
| 0xF9210068, // <ENTRY+072>: std 9, 104(1) |
| 0xF9410070, // <ENTRY+076>: std 10, 112(1) |
| 0xF9810080, // <ENTRY+080>: std 12, 128(1) |
| 0xE98C00A0, // <ENTRY+084>: ld 12, 9000f-1000b+8(12) |
| 0x7D8903A6, // <ENTRY+088>: mtctr 12 |
| 0x4E800421, // <ENTRY+092>: bctrl |
| 0x7C6B1B78, // <ENTRY+096>: mr 11, 3 |
| 0xE8610038, // <ENTRY+100>: ld 3, 56(1) |
| 0xE8810040, // <ENTRY+104>: ld 4, 64(1) |
| 0xE8A10048, // <ENTRY+108>: ld 5, 72(1) |
| 0xE8C10050, // <ENTRY+112>: ld 6, 80(1) |
| 0xE8E10058, // <ENTRY+116>: ld 7, 88(1) |
| 0xE9010060, // <ENTRY+120>: ld 8, 96(1) |
| 0xE9210068, // <ENTRY+124>: ld 9, 104(1) |
| 0xE9410070, // <ENTRY+128>: ld 10, 112(1) |
| 0xE9810080, // <ENTRY+132>: ld 12, 128(1) |
| 0x38210090, // <ENTRY+136>: addi 1, 1, 144 |
| 0xE8010010, // <ENTRY+140>: ld 0, 16(1) |
| 0x7C0803A6, // <ENTRY+144>: mtlr 0 |
| 0x4BFFFF84, // <ENTRY+148>: b 1050b |
| // 9000: |
| 0, 0, // <ENTRY+152>: .quad ENTRY_CURRENT_TABLE |
| 0, 0, // <ENTRY+160>: .quad ENTRY_CURRENT_TABLE_GET |
| 0, 0 // <ENTRY+168>: .quad <slot>*8 |
| }; |
| static const uint64_t TEMPLATE_OFFSET_CURRENT_TABLE = sizeof(code_templ) - 3*8; |
| static const uint64_t TEMPLATE_OFFSET_CURRENT_TABLE_GET = sizeof(code_templ) - 2*8; |
| static const uint64_t TEMPLATE_OFFSET_SLOT = sizeof(code_templ) - 1*8; |
| |
| void |
| entry_patch(mapi_func entry, int slot) |
| { |
| char *code = (char *) entry; |
| *((uint64_t *) (code + TEMPLATE_OFFSET_CURRENT_TABLE)) = (uint64_t) ENTRY_CURRENT_TABLE; |
| *((uint64_t *) (code + TEMPLATE_OFFSET_CURRENT_TABLE_GET)) = (uint64_t) ENTRY_CURRENT_TABLE_GET; |
| *((uint64_t *) (code + TEMPLATE_OFFSET_SLOT)) = slot * sizeof(mapi_func); |
| } |
| |
| mapi_func |
| entry_generate(int slot) |
| { |
| char *code; |
| mapi_func entry; |
| |
| code = u_execmem_alloc(sizeof(code_templ)); |
| if (!code) |
| return NULL; |
| |
| memcpy(code, code_templ, sizeof(code_templ)); |
| |
| entry = (mapi_func) code; |
| entry_patch(entry, slot); |
| |
| return entry; |
| } |
| |
| #endif /* MAPI_MODE_BRIDGE */ |