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https://codeberg.org/anoncontributorxmr/monero.git
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124 lines
3.3 KiB
C
124 lines
3.3 KiB
C
#include <assert.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <string.h>
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#include <stdio.h>
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#include <unistd.h>
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#if !(defined(_MSC_VER) || defined(__MINGW32__))
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#include <sys/mman.h>
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#endif
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#include "int-util.h"
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#include "hash-ops.h"
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#include "variant4_random_math.h"
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#include "CryptonightR_JIT.h"
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#include "CryptonightR_template.h"
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static const uint8_t prologue[] = {
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#if defined __i386 || defined __x86_64__
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0x4C, 0x8B, 0xD7, // mov r10, rdi
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0x53, // push rbx
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0x55, // push rbp
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0x41, 0x57, // push r15
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0x4C, 0x8B, 0xDC, // mov r11, rsp
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0x41, 0x8B, 0x1A, // mov ebx, DWORD PTR [r10]
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0x41, 0x8B, 0x72, 0x04, // mov esi, DWORD PTR [r10+4]
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0x41, 0x8B, 0x7A, 0x08, // mov edi, DWORD PTR [r10+8]
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0x41, 0x8B, 0x6A, 0x0C, // mov ebp, DWORD PTR [r10+12]
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0x41, 0x8B, 0x62, 0x10, // mov esp, DWORD PTR [r10+16]
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0x45, 0x8B, 0x7A, 0x14, // mov r15d, DWORD PTR [r10+20]
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0x41, 0x8B, 0x42, 0x18, // mov eax, DWORD PTR [r10+24]
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0x41, 0x8B, 0x52, 0x1C, // mov edx, DWORD PTR [r10+28]
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0x45, 0x8B, 0x4A, 0x20, // mov r9d, DWORD PTR [r10+32]
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#endif
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};
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static const uint8_t epilogue[] = {
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#if defined __i386 || defined __x86_64__
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0x49, 0x8B, 0xE3, // mov rsp, r11
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0x41, 0x89, 0x1A, // mov DWORD PTR [r10], ebx
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0x41, 0x89, 0x72, 0x04, // mov DWORD PTR [r10+4], esi
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0x41, 0x89, 0x7A, 0x08, // mov DWORD PTR [r10+8], edi
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0x41, 0x89, 0x6A, 0x0C, // mov DWORD PTR [r10+12], ebp
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0x41, 0x5F, // pop r15
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0x5D, // pop rbp
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0x5B, // pop rbx
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0xC3, // ret
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#endif
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};
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#define APPEND_CODE(src, size) \
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do { \
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if (JIT_code + (size) > JIT_code_end) \
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return -1; \
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memcpy(JIT_code, (src), (size)); \
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JIT_code += (size); \
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} while (0)
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int v4_generate_JIT_code(const struct V4_Instruction* code, v4_random_math_JIT_func buf, const size_t buf_size)
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{
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#if defined __i386 || defined __x86_64__
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uint8_t* JIT_code = (uint8_t*) buf;
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const uint8_t* JIT_code_end = JIT_code + buf_size;
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#if !(defined(_MSC_VER) || defined(__MINGW32__))
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if (mprotect((void*)buf, buf_size, PROT_READ | PROT_WRITE))
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return -1;
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#endif
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APPEND_CODE(prologue, sizeof(prologue));
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uint32_t prev_rot_src = 0xFFFFFFFFU;
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for (int i = 0;; ++i)
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{
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const struct V4_Instruction inst = code[i];
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if (inst.opcode == RET)
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break;
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const uint8_t opcode = (inst.opcode == MUL) ? inst.opcode : (inst.opcode + 2);
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const uint32_t a = inst.dst_index;
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const uint32_t b = inst.src_index;
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const uint8_t c = opcode | (inst.dst_index << V4_OPCODE_BITS) | (((inst.src_index == 8) ? inst.dst_index : inst.src_index) << (V4_OPCODE_BITS + V4_DST_INDEX_BITS));
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switch (inst.opcode)
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{
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case ROR:
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case ROL:
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if (b != prev_rot_src)
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{
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prev_rot_src = b;
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const uint8_t* p1 = (const uint8_t*) instructions_mov[c];
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const uint8_t* p2 = (const uint8_t*) instructions_mov[c + 1];
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APPEND_CODE(p1, p2 - p1);
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}
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break;
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}
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if (a == prev_rot_src)
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prev_rot_src = 0xFFFFFFFFU;
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const uint8_t* p1 = (const uint8_t*) instructions[c];
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const uint8_t* p2 = (const uint8_t*) instructions[c + 1];
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APPEND_CODE(p1, p2 - p1);
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if (inst.opcode == ADD)
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*(uint32_t*)(JIT_code - 4) = inst.C;
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}
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APPEND_CODE(epilogue, sizeof(epilogue));
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#if !(defined(_MSC_VER) || defined(__MINGW32__))
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if (mprotect((void*)buf, buf_size, PROT_READ | PROT_EXEC))
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return -1;
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#endif
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__builtin___clear_cache((char*)buf, (char*)JIT_code);
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return 0;
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#else
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return -1;
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#endif
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}
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