| /* |
| * Stack-less Just-In-Time compiler |
| * |
| * Copyright Zoltan Herczeg (hzmester@freemail.hu). All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without modification, are |
| * permitted provided that the following conditions are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright notice, this list of |
| * conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright notice, this list |
| * of conditions and the following disclaimer in the documentation and/or other materials |
| * provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) AND CONTRIBUTORS ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT |
| * SHALL THE COPYRIGHT HOLDER(S) OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED |
| * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
| * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /* x86 64-bit arch dependent functions. */ |
| |
| /* --------------------------------------------------------------------- */ |
| /* Operators */ |
| /* --------------------------------------------------------------------- */ |
| |
| static sljit_s32 emit_load_imm64(struct sljit_compiler *compiler, sljit_s32 reg, sljit_sw imm) |
| { |
| sljit_u8 *inst; |
| |
| inst = (sljit_u8*)ensure_buf(compiler, 1 + 2 + sizeof(sljit_sw)); |
| FAIL_IF(!inst); |
| INC_SIZE(2 + sizeof(sljit_sw)); |
| *inst++ = REX_W | ((reg_map[reg] <= 7) ? 0 : REX_B); |
| *inst++ = U8(MOV_r_i32 | (reg_map[reg] & 0x7)); |
| sljit_unaligned_store_sw(inst, imm); |
| return SLJIT_SUCCESS; |
| } |
| |
| static sljit_s32 emit_do_imm32(struct sljit_compiler *compiler, sljit_u8 rex, sljit_u8 opcode, sljit_sw imm) |
| { |
| sljit_u8 *inst; |
| sljit_uw length = (rex ? 2 : 1) + sizeof(sljit_s32); |
| |
| inst = (sljit_u8*)ensure_buf(compiler, 1 + length); |
| FAIL_IF(!inst); |
| INC_SIZE(length); |
| if (rex) |
| *inst++ = rex; |
| *inst++ = opcode; |
| sljit_unaligned_store_s32(inst, (sljit_s32)imm); |
| return SLJIT_SUCCESS; |
| } |
| |
| static sljit_u8* emit_x86_instruction(struct sljit_compiler *compiler, sljit_uw size, |
| /* The register or immediate operand. */ |
| sljit_s32 a, sljit_sw imma, |
| /* The general operand (not immediate). */ |
| sljit_s32 b, sljit_sw immb) |
| { |
| sljit_u8 *inst; |
| sljit_u8 *buf_ptr; |
| sljit_u8 rex = 0; |
| sljit_u8 reg_lmap_b; |
| sljit_uw flags = size; |
| sljit_uw inst_size; |
| |
| /* The immediate operand must be 32 bit. */ |
| SLJIT_ASSERT(!(a & SLJIT_IMM) || compiler->mode32 || IS_HALFWORD(imma)); |
| /* Both cannot be switched on. */ |
| SLJIT_ASSERT((flags & (EX86_BIN_INS | EX86_SHIFT_INS)) != (EX86_BIN_INS | EX86_SHIFT_INS)); |
| /* Size flags not allowed for typed instructions. */ |
| SLJIT_ASSERT(!(flags & (EX86_BIN_INS | EX86_SHIFT_INS)) || (flags & (EX86_BYTE_ARG | EX86_HALF_ARG)) == 0); |
| /* Both size flags cannot be switched on. */ |
| SLJIT_ASSERT((flags & (EX86_BYTE_ARG | EX86_HALF_ARG)) != (EX86_BYTE_ARG | EX86_HALF_ARG)); |
| /* SSE2 and immediate is not possible. */ |
| SLJIT_ASSERT(!(a & SLJIT_IMM) || !(flags & EX86_SSE2)); |
| SLJIT_ASSERT((flags & (EX86_PREF_F2 | EX86_PREF_F3)) != (EX86_PREF_F2 | EX86_PREF_F3) |
| && (flags & (EX86_PREF_F2 | EX86_PREF_66)) != (EX86_PREF_F2 | EX86_PREF_66) |
| && (flags & (EX86_PREF_F3 | EX86_PREF_66)) != (EX86_PREF_F3 | EX86_PREF_66)); |
| |
| size &= 0xf; |
| inst_size = size; |
| |
| if (!compiler->mode32 && !(flags & EX86_NO_REXW)) |
| rex |= REX_W; |
| else if (flags & EX86_REX) |
| rex |= REX; |
| |
| if (flags & (EX86_PREF_F2 | EX86_PREF_F3)) |
| inst_size++; |
| if (flags & EX86_PREF_66) |
| inst_size++; |
| |
| /* Calculate size of b. */ |
| inst_size += 1; /* mod r/m byte. */ |
| if (b & SLJIT_MEM) { |
| if (!(b & OFFS_REG_MASK)) { |
| if (NOT_HALFWORD(immb)) { |
| PTR_FAIL_IF(emit_load_imm64(compiler, TMP_REG2, immb)); |
| immb = 0; |
| if (b & REG_MASK) |
| b |= TO_OFFS_REG(TMP_REG2); |
| else |
| b |= TMP_REG2; |
| } |
| else if (reg_lmap[b & REG_MASK] == 4) |
| b |= TO_OFFS_REG(SLJIT_SP); |
| } |
| |
| if (!(b & REG_MASK)) |
| inst_size += 1 + sizeof(sljit_s32); /* SIB byte required to avoid RIP based addressing. */ |
| else { |
| if (reg_map[b & REG_MASK] >= 8) |
| rex |= REX_B; |
| |
| if (immb != 0 && (!(b & OFFS_REG_MASK) || (b & OFFS_REG_MASK) == TO_OFFS_REG(SLJIT_SP))) { |
| /* Immediate operand. */ |
| if (immb <= 127 && immb >= -128) |
| inst_size += sizeof(sljit_s8); |
| else |
| inst_size += sizeof(sljit_s32); |
| } |
| else if (reg_lmap[b & REG_MASK] == 5) |
| inst_size += sizeof(sljit_s8); |
| |
| if (b & OFFS_REG_MASK) { |
| inst_size += 1; /* SIB byte. */ |
| if (reg_map[OFFS_REG(b)] >= 8) |
| rex |= REX_X; |
| } |
| } |
| } |
| else if (!(flags & EX86_SSE2_OP2)) { |
| if (reg_map[b] >= 8) |
| rex |= REX_B; |
| } |
| else if (freg_map[b] >= 8) |
| rex |= REX_B; |
| |
| if (a & SLJIT_IMM) { |
| if (flags & EX86_BIN_INS) { |
| if (imma <= 127 && imma >= -128) { |
| inst_size += 1; |
| flags |= EX86_BYTE_ARG; |
| } else |
| inst_size += 4; |
| } |
| else if (flags & EX86_SHIFT_INS) { |
| imma &= compiler->mode32 ? 0x1f : 0x3f; |
| if (imma != 1) { |
| inst_size ++; |
| flags |= EX86_BYTE_ARG; |
| } |
| } else if (flags & EX86_BYTE_ARG) |
| inst_size++; |
| else if (flags & EX86_HALF_ARG) |
| inst_size += sizeof(short); |
| else |
| inst_size += sizeof(sljit_s32); |
| } |
| else { |
| SLJIT_ASSERT(!(flags & EX86_SHIFT_INS) || a == SLJIT_PREF_SHIFT_REG); |
| /* reg_map[SLJIT_PREF_SHIFT_REG] is less than 8. */ |
| if (!(flags & EX86_SSE2_OP1)) { |
| if (reg_map[a] >= 8) |
| rex |= REX_R; |
| } |
| else if (freg_map[a] >= 8) |
| rex |= REX_R; |
| } |
| |
| if (rex) |
| inst_size++; |
| |
| inst = (sljit_u8*)ensure_buf(compiler, 1 + inst_size); |
| PTR_FAIL_IF(!inst); |
| |
| /* Encoding the byte. */ |
| INC_SIZE(inst_size); |
| if (flags & EX86_PREF_F2) |
| *inst++ = 0xf2; |
| if (flags & EX86_PREF_F3) |
| *inst++ = 0xf3; |
| if (flags & EX86_PREF_66) |
| *inst++ = 0x66; |
| if (rex) |
| *inst++ = rex; |
| buf_ptr = inst + size; |
| |
| /* Encode mod/rm byte. */ |
| if (!(flags & EX86_SHIFT_INS)) { |
| if ((flags & EX86_BIN_INS) && (a & SLJIT_IMM)) |
| *inst = (flags & EX86_BYTE_ARG) ? GROUP_BINARY_83 : GROUP_BINARY_81; |
| |
| if (a & SLJIT_IMM) |
| *buf_ptr = 0; |
| else if (!(flags & EX86_SSE2_OP1)) |
| *buf_ptr = U8(reg_lmap[a] << 3); |
| else |
| *buf_ptr = U8(freg_lmap[a] << 3); |
| } |
| else { |
| if (a & SLJIT_IMM) { |
| if (imma == 1) |
| *inst = GROUP_SHIFT_1; |
| else |
| *inst = GROUP_SHIFT_N; |
| } else |
| *inst = GROUP_SHIFT_CL; |
| *buf_ptr = 0; |
| } |
| |
| if (!(b & SLJIT_MEM)) { |
| *buf_ptr = U8(*buf_ptr | MOD_REG | (!(flags & EX86_SSE2_OP2) ? reg_lmap[b] : freg_lmap[b])); |
| buf_ptr++; |
| } else if (b & REG_MASK) { |
| reg_lmap_b = reg_lmap[b & REG_MASK]; |
| |
| if (!(b & OFFS_REG_MASK) || (b & OFFS_REG_MASK) == TO_OFFS_REG(SLJIT_SP) || reg_lmap_b == 5) { |
| if (immb != 0 || reg_lmap_b == 5) { |
| if (immb <= 127 && immb >= -128) |
| *buf_ptr |= 0x40; |
| else |
| *buf_ptr |= 0x80; |
| } |
| |
| if (!(b & OFFS_REG_MASK)) |
| *buf_ptr++ |= reg_lmap_b; |
| else { |
| *buf_ptr++ |= 0x04; |
| *buf_ptr++ = U8(reg_lmap_b | (reg_lmap[OFFS_REG(b)] << 3)); |
| } |
| |
| if (immb != 0 || reg_lmap_b == 5) { |
| if (immb <= 127 && immb >= -128) |
| *buf_ptr++ = U8(immb); /* 8 bit displacement. */ |
| else { |
| sljit_unaligned_store_s32(buf_ptr, (sljit_s32)immb); /* 32 bit displacement. */ |
| buf_ptr += sizeof(sljit_s32); |
| } |
| } |
| } |
| else { |
| *buf_ptr++ |= 0x04; |
| *buf_ptr++ = U8(reg_lmap_b | (reg_lmap[OFFS_REG(b)] << 3) | (immb << 6)); |
| } |
| } |
| else { |
| *buf_ptr++ |= 0x04; |
| *buf_ptr++ = 0x25; |
| sljit_unaligned_store_s32(buf_ptr, (sljit_s32)immb); /* 32 bit displacement. */ |
| buf_ptr += sizeof(sljit_s32); |
| } |
| |
| if (a & SLJIT_IMM) { |
| if (flags & EX86_BYTE_ARG) |
| *buf_ptr = U8(imma); |
| else if (flags & EX86_HALF_ARG) |
| sljit_unaligned_store_s16(buf_ptr, (sljit_s16)imma); |
| else if (!(flags & EX86_SHIFT_INS)) |
| sljit_unaligned_store_s32(buf_ptr, (sljit_s32)imma); |
| } |
| |
| return !(flags & EX86_SHIFT_INS) ? inst : (inst + 1); |
| } |
| |
| /* --------------------------------------------------------------------- */ |
| /* Enter / return */ |
| /* --------------------------------------------------------------------- */ |
| |
| static sljit_u8* generate_far_jump_code(struct sljit_jump *jump, sljit_u8 *code_ptr) |
| { |
| sljit_uw type = jump->flags >> TYPE_SHIFT; |
| |
| int short_addr = !(jump->flags & SLJIT_REWRITABLE_JUMP) && !(jump->flags & JUMP_LABEL) && (jump->u.target <= 0xffffffff); |
| |
| /* The relative jump below specialized for this case. */ |
| SLJIT_ASSERT(reg_map[TMP_REG2] >= 8); |
| |
| if (type < SLJIT_JUMP) { |
| /* Invert type. */ |
| *code_ptr++ = U8(get_jump_code(type ^ 0x1) - 0x10); |
| *code_ptr++ = short_addr ? (6 + 3) : (10 + 3); |
| } |
| |
| *code_ptr++ = short_addr ? REX_B : (REX_W | REX_B); |
| *code_ptr++ = MOV_r_i32 | reg_lmap[TMP_REG2]; |
| jump->addr = (sljit_uw)code_ptr; |
| |
| if (jump->flags & JUMP_LABEL) |
| jump->flags |= PATCH_MD; |
| else if (short_addr) |
| sljit_unaligned_store_s32(code_ptr, (sljit_s32)jump->u.target); |
| else |
| sljit_unaligned_store_sw(code_ptr, (sljit_sw)jump->u.target); |
| |
| code_ptr += short_addr ? sizeof(sljit_s32) : sizeof(sljit_sw); |
| |
| *code_ptr++ = REX_B; |
| *code_ptr++ = GROUP_FF; |
| *code_ptr++ = U8(MOD_REG | (type >= SLJIT_FAST_CALL ? CALL_rm : JMP_rm) | reg_lmap[TMP_REG2]); |
| |
| return code_ptr; |
| } |
| |
| static sljit_u8* generate_put_label_code(struct sljit_put_label *put_label, sljit_u8 *code_ptr, sljit_uw max_label) |
| { |
| if (max_label > HALFWORD_MAX) { |
| put_label->addr -= put_label->flags; |
| put_label->flags = PATCH_MD; |
| return code_ptr; |
| } |
| |
| if (put_label->flags == 0) { |
| /* Destination is register. */ |
| code_ptr = (sljit_u8*)put_label->addr - 2 - sizeof(sljit_uw); |
| |
| SLJIT_ASSERT((code_ptr[0] & 0xf8) == REX_W); |
| SLJIT_ASSERT((code_ptr[1] & 0xf8) == MOV_r_i32); |
| |
| if ((code_ptr[0] & 0x07) != 0) { |
| code_ptr[0] = U8(code_ptr[0] & ~0x08); |
| code_ptr += 2 + sizeof(sljit_s32); |
| } |
| else { |
| code_ptr[0] = code_ptr[1]; |
| code_ptr += 1 + sizeof(sljit_s32); |
| } |
| |
| put_label->addr = (sljit_uw)code_ptr; |
| return code_ptr; |
| } |
| |
| code_ptr -= put_label->flags + (2 + sizeof(sljit_uw)); |
| SLJIT_MEMMOVE(code_ptr, code_ptr + (2 + sizeof(sljit_uw)), put_label->flags); |
| |
| SLJIT_ASSERT((code_ptr[0] & 0xf8) == REX_W); |
| |
| if ((code_ptr[1] & 0xf8) == MOV_r_i32) { |
| code_ptr += 2 + sizeof(sljit_uw); |
| SLJIT_ASSERT((code_ptr[0] & 0xf8) == REX_W); |
| } |
| |
| SLJIT_ASSERT(code_ptr[1] == MOV_rm_r); |
| |
| code_ptr[0] = U8(code_ptr[0] & ~0x4); |
| code_ptr[1] = MOV_rm_i32; |
| code_ptr[2] = U8(code_ptr[2] & ~(0x7 << 3)); |
| |
| code_ptr = (sljit_u8*)(put_label->addr - (2 + sizeof(sljit_uw)) + sizeof(sljit_s32)); |
| put_label->addr = (sljit_uw)code_ptr; |
| put_label->flags = 0; |
| return code_ptr; |
| } |
| |
| SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_enter(struct sljit_compiler *compiler, |
| sljit_s32 options, sljit_s32 arg_types, sljit_s32 scratches, sljit_s32 saveds, |
| sljit_s32 fscratches, sljit_s32 fsaveds, sljit_s32 local_size) |
| { |
| sljit_uw size; |
| sljit_s32 word_arg_count = 0; |
| sljit_s32 saved_arg_count = 0; |
| sljit_s32 saved_regs_size, tmp, i; |
| #ifdef _WIN64 |
| sljit_s32 saved_float_regs_size; |
| sljit_s32 saved_float_regs_offset = 0; |
| sljit_s32 float_arg_count = 0; |
| #endif /* _WIN64 */ |
| sljit_u8 *inst; |
| |
| CHECK_ERROR(); |
| CHECK(check_sljit_emit_enter(compiler, options, arg_types, scratches, saveds, fscratches, fsaveds, local_size)); |
| set_emit_enter(compiler, options, arg_types, scratches, saveds, fscratches, fsaveds, local_size); |
| |
| /* Emit ENDBR64 at function entry if needed. */ |
| FAIL_IF(emit_endbranch(compiler)); |
| |
| compiler->mode32 = 0; |
| |
| /* Including the return address saved by the call instruction. */ |
| saved_regs_size = GET_SAVED_REGISTERS_SIZE(scratches, saveds, 1); |
| |
| tmp = SLJIT_S0 - saveds; |
| for (i = SLJIT_S0; i > tmp; i--) { |
| size = reg_map[i] >= 8 ? 2 : 1; |
| inst = (sljit_u8*)ensure_buf(compiler, 1 + size); |
| FAIL_IF(!inst); |
| INC_SIZE(size); |
| if (reg_map[i] >= 8) |
| *inst++ = REX_B; |
| PUSH_REG(reg_lmap[i]); |
| } |
| |
| for (i = scratches; i >= SLJIT_FIRST_SAVED_REG; i--) { |
| size = reg_map[i] >= 8 ? 2 : 1; |
| inst = (sljit_u8*)ensure_buf(compiler, 1 + size); |
| FAIL_IF(!inst); |
| INC_SIZE(size); |
| if (reg_map[i] >= 8) |
| *inst++ = REX_B; |
| PUSH_REG(reg_lmap[i]); |
| } |
| |
| #ifdef _WIN64 |
| local_size += SLJIT_LOCALS_OFFSET; |
| saved_float_regs_size = GET_SAVED_FLOAT_REGISTERS_SIZE(fscratches, fsaveds, 16); |
| |
| if (saved_float_regs_size > 0) { |
| saved_float_regs_offset = ((local_size + 0xf) & ~0xf); |
| local_size = saved_float_regs_offset + saved_float_regs_size; |
| } |
| #else /* !_WIN64 */ |
| SLJIT_ASSERT(SLJIT_LOCALS_OFFSET == 0); |
| #endif /* _WIN64 */ |
| |
| arg_types >>= SLJIT_ARG_SHIFT; |
| |
| while (arg_types > 0) { |
| if ((arg_types & SLJIT_ARG_MASK) < SLJIT_ARG_TYPE_F64) { |
| tmp = 0; |
| #ifndef _WIN64 |
| switch (word_arg_count) { |
| case 0: |
| tmp = SLJIT_R2; |
| break; |
| case 1: |
| tmp = SLJIT_R1; |
| break; |
| case 2: |
| tmp = TMP_REG1; |
| break; |
| default: |
| tmp = SLJIT_R3; |
| break; |
| } |
| #else /* !_WIN64 */ |
| switch (word_arg_count + float_arg_count) { |
| case 0: |
| tmp = SLJIT_R3; |
| break; |
| case 1: |
| tmp = SLJIT_R1; |
| break; |
| case 2: |
| tmp = SLJIT_R2; |
| break; |
| default: |
| tmp = TMP_REG1; |
| break; |
| } |
| #endif /* _WIN64 */ |
| if (arg_types & SLJIT_ARG_TYPE_SCRATCH_REG) { |
| if (tmp != SLJIT_R0 + word_arg_count) |
| EMIT_MOV(compiler, SLJIT_R0 + word_arg_count, 0, tmp, 0); |
| } else { |
| EMIT_MOV(compiler, SLJIT_S0 - saved_arg_count, 0, tmp, 0); |
| saved_arg_count++; |
| } |
| word_arg_count++; |
| } else { |
| #ifdef _WIN64 |
| SLJIT_COMPILE_ASSERT(SLJIT_FR0 == 1, float_register_index_start); |
| float_arg_count++; |
| if (float_arg_count != float_arg_count + word_arg_count) |
| FAIL_IF(emit_sse2_load(compiler, (arg_types & SLJIT_ARG_MASK) == SLJIT_ARG_TYPE_F32, |
| float_arg_count, float_arg_count + word_arg_count, 0)); |
| #endif /* _WIN64 */ |
| } |
| arg_types >>= SLJIT_ARG_SHIFT; |
| } |
| |
| local_size = ((local_size + saved_regs_size + 0xf) & ~0xf) - saved_regs_size; |
| compiler->local_size = local_size; |
| |
| #ifdef _WIN64 |
| if (local_size > 0) { |
| if (local_size <= 4 * 4096) { |
| if (local_size > 4096) |
| EMIT_MOV(compiler, TMP_REG1, 0, SLJIT_MEM1(SLJIT_SP), -4096); |
| if (local_size > 2 * 4096) |
| EMIT_MOV(compiler, TMP_REG1, 0, SLJIT_MEM1(SLJIT_SP), -4096 * 2); |
| if (local_size > 3 * 4096) |
| EMIT_MOV(compiler, TMP_REG1, 0, SLJIT_MEM1(SLJIT_SP), -4096 * 3); |
| } |
| else { |
| EMIT_MOV(compiler, TMP_REG1, 0, SLJIT_IMM, local_size >> 12); |
| |
| EMIT_MOV(compiler, TMP_REG2, 0, SLJIT_MEM1(SLJIT_SP), -4096); |
| BINARY_IMM32(SUB, 4096, SLJIT_SP, 0); |
| BINARY_IMM32(SUB, 1, TMP_REG1, 0); |
| |
| inst = (sljit_u8*)ensure_buf(compiler, 1 + 2); |
| FAIL_IF(!inst); |
| |
| INC_SIZE(2); |
| inst[0] = JNE_i8; |
| inst[1] = (sljit_u8)-21; |
| local_size &= 0xfff; |
| } |
| |
| if (local_size > 0) |
| EMIT_MOV(compiler, TMP_REG1, 0, SLJIT_MEM1(SLJIT_SP), -local_size); |
| } |
| #endif /* _WIN64 */ |
| |
| if (local_size > 0) |
| BINARY_IMM32(SUB, local_size, SLJIT_SP, 0); |
| |
| #ifdef _WIN64 |
| if (saved_float_regs_size > 0) { |
| compiler->mode32 = 1; |
| |
| tmp = SLJIT_FS0 - fsaveds; |
| for (i = SLJIT_FS0; i > tmp; i--) { |
| inst = emit_x86_instruction(compiler, 2 | EX86_SSE2, i, 0, SLJIT_MEM1(SLJIT_SP), saved_float_regs_offset); |
| *inst++ = GROUP_0F; |
| *inst = MOVAPS_xm_x; |
| saved_float_regs_offset += 16; |
| } |
| |
| for (i = fscratches; i >= SLJIT_FIRST_SAVED_FLOAT_REG; i--) { |
| inst = emit_x86_instruction(compiler, 2 | EX86_SSE2, i, 0, SLJIT_MEM1(SLJIT_SP), saved_float_regs_offset); |
| *inst++ = GROUP_0F; |
| *inst = MOVAPS_xm_x; |
| saved_float_regs_offset += 16; |
| } |
| } |
| #endif /* _WIN64 */ |
| |
| return SLJIT_SUCCESS; |
| } |
| |
| SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_set_context(struct sljit_compiler *compiler, |
| sljit_s32 options, sljit_s32 arg_types, sljit_s32 scratches, sljit_s32 saveds, |
| sljit_s32 fscratches, sljit_s32 fsaveds, sljit_s32 local_size) |
| { |
| sljit_s32 saved_regs_size; |
| #ifdef _WIN64 |
| sljit_s32 saved_float_regs_size; |
| #endif /* _WIN64 */ |
| |
| CHECK_ERROR(); |
| CHECK(check_sljit_set_context(compiler, options, arg_types, scratches, saveds, fscratches, fsaveds, local_size)); |
| set_set_context(compiler, options, arg_types, scratches, saveds, fscratches, fsaveds, local_size); |
| |
| #ifdef _WIN64 |
| local_size += SLJIT_LOCALS_OFFSET; |
| saved_float_regs_size = GET_SAVED_FLOAT_REGISTERS_SIZE(fscratches, fsaveds, 16); |
| |
| if (saved_float_regs_size > 0) |
| local_size = ((local_size + 0xf) & ~0xf) + saved_float_regs_size; |
| #else /* !_WIN64 */ |
| SLJIT_ASSERT(SLJIT_LOCALS_OFFSET == 0); |
| #endif /* _WIN64 */ |
| |
| /* Including the return address saved by the call instruction. */ |
| saved_regs_size = GET_SAVED_REGISTERS_SIZE(scratches, saveds, 1); |
| compiler->local_size = ((local_size + saved_regs_size + 0xf) & ~0xf) - saved_regs_size; |
| return SLJIT_SUCCESS; |
| } |
| |
| static sljit_s32 emit_stack_frame_release(struct sljit_compiler *compiler) |
| { |
| sljit_uw size; |
| sljit_s32 i, tmp; |
| sljit_u8 *inst; |
| #ifdef _WIN64 |
| sljit_s32 saved_float_regs_offset; |
| sljit_s32 fscratches = compiler->fscratches; |
| sljit_s32 fsaveds = compiler->fsaveds; |
| #endif /* _WIN64 */ |
| |
| #ifdef _WIN64 |
| saved_float_regs_offset = GET_SAVED_FLOAT_REGISTERS_SIZE(fscratches, fsaveds, 16); |
| |
| if (saved_float_regs_offset > 0) { |
| compiler->mode32 = 1; |
| saved_float_regs_offset = (compiler->local_size - saved_float_regs_offset) & ~0xf; |
| |
| tmp = SLJIT_FS0 - fsaveds; |
| for (i = SLJIT_FS0; i > tmp; i--) { |
| inst = emit_x86_instruction(compiler, 2 | EX86_SSE2, i, 0, SLJIT_MEM1(SLJIT_SP), saved_float_regs_offset); |
| *inst++ = GROUP_0F; |
| *inst = MOVAPS_x_xm; |
| saved_float_regs_offset += 16; |
| } |
| |
| for (i = fscratches; i >= SLJIT_FIRST_SAVED_FLOAT_REG; i--) { |
| inst = emit_x86_instruction(compiler, 2 | EX86_SSE2, i, 0, SLJIT_MEM1(SLJIT_SP), saved_float_regs_offset); |
| *inst++ = GROUP_0F; |
| *inst = MOVAPS_x_xm; |
| saved_float_regs_offset += 16; |
| } |
| } |
| #endif /* _WIN64 */ |
| |
| if (compiler->local_size > 0) { |
| if (compiler->local_size <= 127) { |
| inst = (sljit_u8*)ensure_buf(compiler, 1 + 4); |
| FAIL_IF(!inst); |
| INC_SIZE(4); |
| *inst++ = REX_W; |
| *inst++ = GROUP_BINARY_83; |
| *inst++ = MOD_REG | ADD | 4; |
| *inst = U8(compiler->local_size); |
| } |
| else { |
| inst = (sljit_u8*)ensure_buf(compiler, 1 + 7); |
| FAIL_IF(!inst); |
| INC_SIZE(7); |
| *inst++ = REX_W; |
| *inst++ = GROUP_BINARY_81; |
| *inst++ = MOD_REG | ADD | 4; |
| sljit_unaligned_store_s32(inst, compiler->local_size); |
| } |
| } |
| |
| tmp = compiler->scratches; |
| for (i = SLJIT_FIRST_SAVED_REG; i <= tmp; i++) { |
| size = reg_map[i] >= 8 ? 2 : 1; |
| inst = (sljit_u8*)ensure_buf(compiler, 1 + size); |
| FAIL_IF(!inst); |
| INC_SIZE(size); |
| if (reg_map[i] >= 8) |
| *inst++ = REX_B; |
| POP_REG(reg_lmap[i]); |
| } |
| |
| tmp = compiler->saveds < SLJIT_NUMBER_OF_SAVED_REGISTERS ? (SLJIT_S0 + 1 - compiler->saveds) : SLJIT_FIRST_SAVED_REG; |
| for (i = tmp; i <= SLJIT_S0; i++) { |
| size = reg_map[i] >= 8 ? 2 : 1; |
| inst = (sljit_u8*)ensure_buf(compiler, 1 + size); |
| FAIL_IF(!inst); |
| INC_SIZE(size); |
| if (reg_map[i] >= 8) |
| *inst++ = REX_B; |
| POP_REG(reg_lmap[i]); |
| } |
| |
| return SLJIT_SUCCESS; |
| } |
| |
| SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_return_void(struct sljit_compiler *compiler) |
| { |
| sljit_u8 *inst; |
| |
| CHECK_ERROR(); |
| CHECK(check_sljit_emit_return_void(compiler)); |
| |
| FAIL_IF(emit_stack_frame_release(compiler)); |
| |
| inst = (sljit_u8*)ensure_buf(compiler, 1 + 1); |
| FAIL_IF(!inst); |
| INC_SIZE(1); |
| RET(); |
| return SLJIT_SUCCESS; |
| } |
| |
| /* --------------------------------------------------------------------- */ |
| /* Call / return instructions */ |
| /* --------------------------------------------------------------------- */ |
| |
| #ifndef _WIN64 |
| |
| static sljit_s32 call_with_args(struct sljit_compiler *compiler, sljit_s32 arg_types, sljit_s32 *src_ptr) |
| { |
| sljit_s32 src = src_ptr ? (*src_ptr) : 0; |
| sljit_s32 word_arg_count = 0; |
| |
| SLJIT_ASSERT(reg_map[SLJIT_R1] == 6 && reg_map[SLJIT_R3] == 1 && reg_map[TMP_REG1] == 2); |
| SLJIT_ASSERT(!(src & SLJIT_MEM)); |
| |
| /* Remove return value. */ |
| arg_types >>= SLJIT_ARG_SHIFT; |
| |
| while (arg_types) { |
| if ((arg_types & SLJIT_ARG_MASK) < SLJIT_ARG_TYPE_F64) |
| word_arg_count++; |
| arg_types >>= SLJIT_ARG_SHIFT; |
| } |
| |
| if (word_arg_count == 0) |
| return SLJIT_SUCCESS; |
| |
| if (word_arg_count >= 3) { |
| if (src == SLJIT_R2) |
| *src_ptr = TMP_REG1; |
| EMIT_MOV(compiler, TMP_REG1, 0, SLJIT_R2, 0); |
| } |
| |
| return emit_mov(compiler, SLJIT_R2, 0, SLJIT_R0, 0); |
| } |
| |
| #else |
| |
| static sljit_s32 call_with_args(struct sljit_compiler *compiler, sljit_s32 arg_types, sljit_s32 *src_ptr) |
| { |
| sljit_s32 src = src_ptr ? (*src_ptr) : 0; |
| sljit_s32 arg_count = 0; |
| sljit_s32 word_arg_count = 0; |
| sljit_s32 float_arg_count = 0; |
| sljit_s32 types = 0; |
| sljit_s32 data_trandfer = 0; |
| static sljit_u8 word_arg_regs[5] = { 0, SLJIT_R3, SLJIT_R1, SLJIT_R2, TMP_REG1 }; |
| |
| SLJIT_ASSERT(reg_map[SLJIT_R3] == 1 && reg_map[SLJIT_R1] == 2 && reg_map[SLJIT_R2] == 8 && reg_map[TMP_REG1] == 9); |
| SLJIT_ASSERT(!(src & SLJIT_MEM)); |
| |
| arg_types >>= SLJIT_ARG_SHIFT; |
| |
| while (arg_types) { |
| types = (types << SLJIT_ARG_SHIFT) | (arg_types & SLJIT_ARG_MASK); |
| |
| switch (arg_types & SLJIT_ARG_MASK) { |
| case SLJIT_ARG_TYPE_F64: |
| case SLJIT_ARG_TYPE_F32: |
| arg_count++; |
| float_arg_count++; |
| |
| if (arg_count != float_arg_count) |
| data_trandfer = 1; |
| break; |
| default: |
| arg_count++; |
| word_arg_count++; |
| |
| if (arg_count != word_arg_count || arg_count != word_arg_regs[arg_count]) { |
| data_trandfer = 1; |
| |
| if (src == word_arg_regs[arg_count]) { |
| EMIT_MOV(compiler, TMP_REG2, 0, src, 0); |
| *src_ptr = TMP_REG2; |
| } |
| } |
| break; |
| } |
| |
| arg_types >>= SLJIT_ARG_SHIFT; |
| } |
| |
| if (!data_trandfer) |
| return SLJIT_SUCCESS; |
| |
| while (types) { |
| switch (types & SLJIT_ARG_MASK) { |
| case SLJIT_ARG_TYPE_F64: |
| if (arg_count != float_arg_count) |
| FAIL_IF(emit_sse2_load(compiler, 0, arg_count, float_arg_count, 0)); |
| arg_count--; |
| float_arg_count--; |
| break; |
| case SLJIT_ARG_TYPE_F32: |
| if (arg_count != float_arg_count) |
| FAIL_IF(emit_sse2_load(compiler, 1, arg_count, float_arg_count, 0)); |
| arg_count--; |
| float_arg_count--; |
| break; |
| default: |
| if (arg_count != word_arg_count || arg_count != word_arg_regs[arg_count]) |
| EMIT_MOV(compiler, word_arg_regs[arg_count], 0, word_arg_count, 0); |
| arg_count--; |
| word_arg_count--; |
| break; |
| } |
| |
| types >>= SLJIT_ARG_SHIFT; |
| } |
| |
| return SLJIT_SUCCESS; |
| } |
| |
| #endif |
| |
| SLJIT_API_FUNC_ATTRIBUTE struct sljit_jump* sljit_emit_call(struct sljit_compiler *compiler, sljit_s32 type, |
| sljit_s32 arg_types) |
| { |
| CHECK_ERROR_PTR(); |
| CHECK_PTR(check_sljit_emit_call(compiler, type, arg_types)); |
| |
| compiler->mode32 = 0; |
| |
| PTR_FAIL_IF(call_with_args(compiler, arg_types, NULL)); |
| |
| if (type & SLJIT_CALL_RETURN) { |
| PTR_FAIL_IF(emit_stack_frame_release(compiler)); |
| type = SLJIT_JUMP | (type & SLJIT_REWRITABLE_JUMP); |
| } |
| |
| #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \ |
| || (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS) |
| compiler->skip_checks = 1; |
| #endif |
| return sljit_emit_jump(compiler, type); |
| } |
| |
| SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_icall(struct sljit_compiler *compiler, sljit_s32 type, |
| sljit_s32 arg_types, |
| sljit_s32 src, sljit_sw srcw) |
| { |
| CHECK_ERROR(); |
| CHECK(check_sljit_emit_icall(compiler, type, arg_types, src, srcw)); |
| |
| compiler->mode32 = 0; |
| |
| if (src & SLJIT_MEM) { |
| ADJUST_LOCAL_OFFSET(src, srcw); |
| EMIT_MOV(compiler, TMP_REG2, 0, src, srcw); |
| src = TMP_REG2; |
| } |
| |
| if (type & SLJIT_CALL_RETURN) { |
| if (src >= SLJIT_FIRST_SAVED_REG && src <= SLJIT_S0) { |
| EMIT_MOV(compiler, TMP_REG2, 0, src, srcw); |
| src = TMP_REG2; |
| } |
| |
| FAIL_IF(emit_stack_frame_release(compiler)); |
| type = SLJIT_JUMP; |
| } |
| |
| FAIL_IF(call_with_args(compiler, arg_types, &src)); |
| |
| #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \ |
| || (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS) |
| compiler->skip_checks = 1; |
| #endif |
| |
| return sljit_emit_ijump(compiler, type, src, srcw); |
| } |
| |
| SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_fast_enter(struct sljit_compiler *compiler, sljit_s32 dst, sljit_sw dstw) |
| { |
| sljit_u8 *inst; |
| |
| CHECK_ERROR(); |
| CHECK(check_sljit_emit_fast_enter(compiler, dst, dstw)); |
| ADJUST_LOCAL_OFFSET(dst, dstw); |
| |
| if (FAST_IS_REG(dst)) { |
| if (reg_map[dst] < 8) { |
| inst = (sljit_u8*)ensure_buf(compiler, 1 + 1); |
| FAIL_IF(!inst); |
| INC_SIZE(1); |
| POP_REG(reg_lmap[dst]); |
| return SLJIT_SUCCESS; |
| } |
| |
| inst = (sljit_u8*)ensure_buf(compiler, 1 + 2); |
| FAIL_IF(!inst); |
| INC_SIZE(2); |
| *inst++ = REX_B; |
| POP_REG(reg_lmap[dst]); |
| return SLJIT_SUCCESS; |
| } |
| |
| /* REX_W is not necessary (src is not immediate). */ |
| compiler->mode32 = 1; |
| inst = emit_x86_instruction(compiler, 1, 0, 0, dst, dstw); |
| FAIL_IF(!inst); |
| *inst++ = POP_rm; |
| return SLJIT_SUCCESS; |
| } |
| |
| static sljit_s32 emit_fast_return(struct sljit_compiler *compiler, sljit_s32 src, sljit_sw srcw) |
| { |
| sljit_u8 *inst; |
| |
| if (FAST_IS_REG(src)) { |
| if (reg_map[src] < 8) { |
| inst = (sljit_u8*)ensure_buf(compiler, 1 + 1 + 1); |
| FAIL_IF(!inst); |
| |
| INC_SIZE(1 + 1); |
| PUSH_REG(reg_lmap[src]); |
| } |
| else { |
| inst = (sljit_u8*)ensure_buf(compiler, 1 + 2 + 1); |
| FAIL_IF(!inst); |
| |
| INC_SIZE(2 + 1); |
| *inst++ = REX_B; |
| PUSH_REG(reg_lmap[src]); |
| } |
| } |
| else { |
| /* REX_W is not necessary (src is not immediate). */ |
| compiler->mode32 = 1; |
| inst = emit_x86_instruction(compiler, 1, 0, 0, src, srcw); |
| FAIL_IF(!inst); |
| *inst++ = GROUP_FF; |
| *inst |= PUSH_rm; |
| |
| inst = (sljit_u8*)ensure_buf(compiler, 1 + 1); |
| FAIL_IF(!inst); |
| INC_SIZE(1); |
| } |
| |
| RET(); |
| return SLJIT_SUCCESS; |
| } |
| |
| /* --------------------------------------------------------------------- */ |
| /* Extend input */ |
| /* --------------------------------------------------------------------- */ |
| |
| static sljit_s32 emit_mov_int(struct sljit_compiler *compiler, sljit_s32 sign, |
| sljit_s32 dst, sljit_sw dstw, |
| sljit_s32 src, sljit_sw srcw) |
| { |
| sljit_u8* inst; |
| sljit_s32 dst_r; |
| |
| compiler->mode32 = 0; |
| |
| if (src & SLJIT_IMM) { |
| if (FAST_IS_REG(dst)) { |
| if (sign || ((sljit_uw)srcw <= 0x7fffffff)) { |
| inst = emit_x86_instruction(compiler, 1, SLJIT_IMM, (sljit_sw)(sljit_s32)srcw, dst, dstw); |
| FAIL_IF(!inst); |
| *inst = MOV_rm_i32; |
| return SLJIT_SUCCESS; |
| } |
| return emit_load_imm64(compiler, dst, srcw); |
| } |
| compiler->mode32 = 1; |
| inst = emit_x86_instruction(compiler, 1, SLJIT_IMM, (sljit_sw)(sljit_s32)srcw, dst, dstw); |
| FAIL_IF(!inst); |
| *inst = MOV_rm_i32; |
| compiler->mode32 = 0; |
| return SLJIT_SUCCESS; |
| } |
| |
| dst_r = FAST_IS_REG(dst) ? dst : TMP_REG1; |
| |
| if ((dst & SLJIT_MEM) && FAST_IS_REG(src)) |
| dst_r = src; |
| else { |
| if (sign) { |
| inst = emit_x86_instruction(compiler, 1, dst_r, 0, src, srcw); |
| FAIL_IF(!inst); |
| *inst++ = MOVSXD_r_rm; |
| } else { |
| compiler->mode32 = 1; |
| FAIL_IF(emit_mov(compiler, dst_r, 0, src, srcw)); |
| compiler->mode32 = 0; |
| } |
| } |
| |
| if (dst & SLJIT_MEM) { |
| compiler->mode32 = 1; |
| inst = emit_x86_instruction(compiler, 1, dst_r, 0, dst, dstw); |
| FAIL_IF(!inst); |
| *inst = MOV_rm_r; |
| compiler->mode32 = 0; |
| } |
| |
| return SLJIT_SUCCESS; |
| } |
| |
| static sljit_s32 skip_frames_before_return(struct sljit_compiler *compiler) |
| { |
| sljit_s32 tmp, size; |
| |
| /* Don't adjust shadow stack if it isn't enabled. */ |
| if (!cpu_has_shadow_stack()) |
| return SLJIT_SUCCESS; |
| |
| size = compiler->local_size; |
| tmp = compiler->scratches; |
| if (tmp >= SLJIT_FIRST_SAVED_REG) |
| size += (tmp - SLJIT_FIRST_SAVED_REG + 1) * SSIZE_OF(sw); |
| tmp = compiler->saveds < SLJIT_NUMBER_OF_SAVED_REGISTERS ? (SLJIT_S0 + 1 - compiler->saveds) : SLJIT_FIRST_SAVED_REG; |
| if (SLJIT_S0 >= tmp) |
| size += (SLJIT_S0 - tmp + 1) * SSIZE_OF(sw); |
| |
| return adjust_shadow_stack(compiler, SLJIT_MEM1(SLJIT_SP), size); |
| } |