| /* |
| * 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 32-bit arch dependent functions. */ |
| |
| static sljit_s32 emit_do_imm(struct sljit_compiler *compiler, sljit_u8 opcode, sljit_sw imm) |
| { |
| sljit_u8 *inst; |
| |
| inst = (sljit_u8*)ensure_buf(compiler, 1 + 1 + sizeof(sljit_sw)); |
| FAIL_IF(!inst); |
| INC_SIZE(1 + sizeof(sljit_sw)); |
| *inst++ = opcode; |
| sljit_unaligned_store_sw(inst, imm); |
| return SLJIT_SUCCESS; |
| } |
| |
| static sljit_u8* generate_far_jump_code(struct sljit_jump *jump, sljit_u8 *code_ptr, sljit_sw executable_offset) |
| { |
| sljit_s32 type = jump->flags >> TYPE_SHIFT; |
| |
| if (type == SLJIT_JUMP) { |
| *code_ptr++ = JMP_i32; |
| jump->addr++; |
| } |
| else if (type >= SLJIT_FAST_CALL) { |
| *code_ptr++ = CALL_i32; |
| jump->addr++; |
| } |
| else { |
| *code_ptr++ = GROUP_0F; |
| *code_ptr++ = get_jump_code(type); |
| jump->addr += 2; |
| } |
| |
| if (jump->flags & JUMP_LABEL) |
| jump->flags |= PATCH_MW; |
| else |
| sljit_unaligned_store_sw(code_ptr, jump->u.target - (jump->addr + 4) - (sljit_uw)executable_offset); |
| code_ptr += 4; |
| |
| 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_s32 args, size; |
| 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 ENDBR32 at function entry if needed. */ |
| FAIL_IF(emit_endbranch(compiler)); |
| |
| args = get_arg_count(arg_types); |
| compiler->args = args; |
| |
| /* [esp+0] for saving temporaries and function calls. */ |
| compiler->stack_tmp_size = 2 * sizeof(sljit_sw); |
| |
| #if !(defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL) |
| if (scratches > 3) |
| compiler->stack_tmp_size = 3 * sizeof(sljit_sw); |
| #endif |
| |
| compiler->saveds_offset = compiler->stack_tmp_size; |
| if (scratches > 3) |
| compiler->saveds_offset += ((scratches > (3 + 6)) ? 6 : (scratches - 3)) * sizeof(sljit_sw); |
| |
| compiler->locals_offset = compiler->saveds_offset; |
| |
| if (saveds > 3) |
| compiler->locals_offset += (saveds - 3) * sizeof(sljit_sw); |
| |
| if (options & SLJIT_F64_ALIGNMENT) |
| compiler->locals_offset = (compiler->locals_offset + sizeof(sljit_f64) - 1) & ~(sizeof(sljit_f64) - 1); |
| |
| size = 1 + (scratches > 9 ? (scratches - 9) : 0) + (saveds <= 3 ? saveds : 3); |
| #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL) |
| size += (args > 0 ? (args * 2) : 0) + (args > 2 ? 2 : 0); |
| #else |
| size += (args > 0 ? (2 + args * 3) : 0); |
| #endif |
| inst = (sljit_u8*)ensure_buf(compiler, 1 + size); |
| FAIL_IF(!inst); |
| |
| INC_SIZE(size); |
| PUSH_REG(reg_map[TMP_REG1]); |
| #if !(defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL) |
| if (args > 0) { |
| *inst++ = MOV_r_rm; |
| *inst++ = MOD_REG | (reg_map[TMP_REG1] << 3) | 0x4 /* esp */; |
| } |
| #endif |
| if (saveds > 2 || scratches > 9) |
| PUSH_REG(reg_map[SLJIT_S2]); |
| if (saveds > 1 || scratches > 10) |
| PUSH_REG(reg_map[SLJIT_S1]); |
| if (saveds > 0 || scratches > 11) |
| PUSH_REG(reg_map[SLJIT_S0]); |
| |
| #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL) |
| if (args > 0) { |
| inst[0] = MOV_r_rm; |
| inst[1] = MOD_REG | (reg_map[SLJIT_S0] << 3) | reg_map[SLJIT_R2]; |
| inst += 2; |
| } |
| if (args > 1) { |
| inst[0] = MOV_r_rm; |
| inst[1] = MOD_REG | (reg_map[SLJIT_S1] << 3) | reg_map[SLJIT_R1]; |
| inst += 2; |
| } |
| if (args > 2) { |
| inst[0] = MOV_r_rm; |
| inst[1] = MOD_DISP8 | (reg_map[SLJIT_S2] << 3) | 0x4 /* esp */; |
| inst[2] = 0x24; |
| inst[3] = sizeof(sljit_sw) * (3 + 2); /* saveds >= 3 as well. */ |
| } |
| #else |
| if (args > 0) { |
| inst[0] = MOV_r_rm; |
| inst[1] = MOD_DISP8 | (reg_map[SLJIT_S0] << 3) | reg_map[TMP_REG1]; |
| inst[2] = sizeof(sljit_sw) * 2; |
| inst += 3; |
| } |
| if (args > 1) { |
| inst[0] = MOV_r_rm; |
| inst[1] = MOD_DISP8 | (reg_map[SLJIT_S1] << 3) | reg_map[TMP_REG1]; |
| inst[2] = sizeof(sljit_sw) * 3; |
| inst += 3; |
| } |
| if (args > 2) { |
| inst[0] = MOV_r_rm; |
| inst[1] = MOD_DISP8 | (reg_map[SLJIT_S2] << 3) | reg_map[TMP_REG1]; |
| inst[2] = sizeof(sljit_sw) * 4; |
| } |
| #endif |
| |
| SLJIT_ASSERT(SLJIT_LOCALS_OFFSET > 0); |
| |
| #if defined(__APPLE__) |
| /* Ignore pushed registers and SLJIT_LOCALS_OFFSET when computing the aligned local size. */ |
| saveds = (2 + (scratches > 9 ? (scratches - 9) : 0) + (saveds <= 3 ? saveds : 3)) * sizeof(sljit_uw); |
| local_size = ((SLJIT_LOCALS_OFFSET + saveds + local_size + 15) & ~15) - saveds; |
| #else |
| if (options & SLJIT_F64_ALIGNMENT) |
| local_size = SLJIT_LOCALS_OFFSET + ((local_size + sizeof(sljit_f64) - 1) & ~(sizeof(sljit_f64) - 1)); |
| else |
| local_size = SLJIT_LOCALS_OFFSET + ((local_size + sizeof(sljit_sw) - 1) & ~(sizeof(sljit_sw) - 1)); |
| #endif |
| |
| compiler->local_size = local_size; |
| |
| #ifdef _WIN32 |
| 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, SLJIT_R0, 0, SLJIT_SP, 0); |
| EMIT_MOV(compiler, SLJIT_R1, 0, SLJIT_IMM, (local_size - 1) >> 12); |
| |
| SLJIT_ASSERT (reg_map[SLJIT_R0] == 0); |
| |
| EMIT_MOV(compiler, TMP_REG1, 0, SLJIT_MEM1(SLJIT_R0), -4096); |
| FAIL_IF(emit_non_cum_binary(compiler, BINARY_OPCODE(SUB), |
| SLJIT_R0, 0, SLJIT_R0, 0, SLJIT_IMM, 4096)); |
| FAIL_IF(emit_non_cum_binary(compiler, BINARY_OPCODE(SUB), |
| SLJIT_R1, 0, SLJIT_R1, 0, SLJIT_IMM, 1)); |
| |
| inst = (sljit_u8*)ensure_buf(compiler, 1 + 2); |
| FAIL_IF(!inst); |
| |
| INC_SIZE(2); |
| inst[0] = JNE_i8; |
| inst[1] = (sljit_s8) -16; |
| } |
| |
| EMIT_MOV(compiler, TMP_REG1, 0, SLJIT_MEM1(SLJIT_SP), -local_size); |
| } |
| #endif |
| |
| SLJIT_ASSERT(local_size > 0); |
| |
| #if !defined(__APPLE__) |
| if (options & SLJIT_F64_ALIGNMENT) { |
| EMIT_MOV(compiler, TMP_REG1, 0, SLJIT_SP, 0); |
| |
| /* Some space might allocated during sljit_grow_stack() above on WIN32. */ |
| FAIL_IF(emit_non_cum_binary(compiler, BINARY_OPCODE(SUB), |
| SLJIT_SP, 0, SLJIT_SP, 0, SLJIT_IMM, local_size + sizeof(sljit_sw))); |
| |
| #if defined _WIN32 && !(defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL) |
| if (compiler->local_size > 1024) |
| FAIL_IF(emit_cum_binary(compiler, BINARY_OPCODE(ADD), |
| TMP_REG1, 0, TMP_REG1, 0, SLJIT_IMM, sizeof(sljit_sw))); |
| #endif |
| |
| inst = (sljit_u8*)ensure_buf(compiler, 1 + 6); |
| FAIL_IF(!inst); |
| |
| INC_SIZE(6); |
| inst[0] = GROUP_BINARY_81; |
| inst[1] = MOD_REG | AND | reg_map[SLJIT_SP]; |
| sljit_unaligned_store_sw(inst + 2, ~(sizeof(sljit_f64) - 1)); |
| |
| /* The real local size must be used. */ |
| return emit_mov(compiler, SLJIT_MEM1(SLJIT_SP), compiler->local_size, TMP_REG1, 0); |
| } |
| #endif |
| return emit_non_cum_binary(compiler, BINARY_OPCODE(SUB), |
| SLJIT_SP, 0, SLJIT_SP, 0, SLJIT_IMM, local_size); |
| } |
| |
| 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) |
| { |
| 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); |
| |
| compiler->args = get_arg_count(arg_types); |
| |
| /* [esp+0] for saving temporaries and function calls. */ |
| compiler->stack_tmp_size = 2 * sizeof(sljit_sw); |
| |
| #if !(defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL) |
| if (scratches > 3) |
| compiler->stack_tmp_size = 3 * sizeof(sljit_sw); |
| #endif |
| |
| compiler->saveds_offset = compiler->stack_tmp_size; |
| if (scratches > 3) |
| compiler->saveds_offset += ((scratches > (3 + 6)) ? 6 : (scratches - 3)) * sizeof(sljit_sw); |
| |
| compiler->locals_offset = compiler->saveds_offset; |
| |
| if (saveds > 3) |
| compiler->locals_offset += (saveds - 3) * sizeof(sljit_sw); |
| |
| if (options & SLJIT_F64_ALIGNMENT) |
| compiler->locals_offset = (compiler->locals_offset + sizeof(sljit_f64) - 1) & ~(sizeof(sljit_f64) - 1); |
| |
| #if defined(__APPLE__) |
| saveds = (2 + (scratches > 9 ? (scratches - 9) : 0) + (saveds <= 3 ? saveds : 3)) * sizeof(sljit_uw); |
| compiler->local_size = ((SLJIT_LOCALS_OFFSET + saveds + local_size + 15) & ~15) - saveds; |
| #else |
| if (options & SLJIT_F64_ALIGNMENT) |
| compiler->local_size = SLJIT_LOCALS_OFFSET + ((local_size + sizeof(sljit_f64) - 1) & ~(sizeof(sljit_f64) - 1)); |
| else |
| compiler->local_size = SLJIT_LOCALS_OFFSET + ((local_size + sizeof(sljit_sw) - 1) & ~(sizeof(sljit_sw) - 1)); |
| #endif |
| return SLJIT_SUCCESS; |
| } |
| |
| SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_return(struct sljit_compiler *compiler, sljit_s32 op, sljit_s32 src, sljit_sw srcw) |
| { |
| sljit_s32 size; |
| sljit_u8 *inst; |
| |
| CHECK_ERROR(); |
| CHECK(check_sljit_emit_return(compiler, op, src, srcw)); |
| SLJIT_ASSERT(compiler->args >= 0); |
| |
| FAIL_IF(emit_mov_before_return(compiler, op, src, srcw)); |
| |
| SLJIT_ASSERT(compiler->local_size > 0); |
| |
| #if !defined(__APPLE__) |
| if (compiler->options & SLJIT_F64_ALIGNMENT) |
| EMIT_MOV(compiler, SLJIT_SP, 0, SLJIT_MEM1(SLJIT_SP), compiler->local_size) |
| else |
| FAIL_IF(emit_cum_binary(compiler, BINARY_OPCODE(ADD), |
| SLJIT_SP, 0, SLJIT_SP, 0, SLJIT_IMM, compiler->local_size)); |
| #else |
| FAIL_IF(emit_cum_binary(compiler, BINARY_OPCODE(ADD), |
| SLJIT_SP, 0, SLJIT_SP, 0, SLJIT_IMM, compiler->local_size)); |
| #endif |
| |
| size = 2 + (compiler->scratches > 9 ? (compiler->scratches - 9) : 0) + |
| (compiler->saveds <= 3 ? compiler->saveds : 3); |
| #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL) |
| if (compiler->args > 2) |
| size += 2; |
| #endif |
| inst = (sljit_u8*)ensure_buf(compiler, 1 + size); |
| FAIL_IF(!inst); |
| |
| INC_SIZE(size); |
| |
| if (compiler->saveds > 0 || compiler->scratches > 11) |
| POP_REG(reg_map[SLJIT_S0]); |
| if (compiler->saveds > 1 || compiler->scratches > 10) |
| POP_REG(reg_map[SLJIT_S1]); |
| if (compiler->saveds > 2 || compiler->scratches > 9) |
| POP_REG(reg_map[SLJIT_S2]); |
| POP_REG(reg_map[TMP_REG1]); |
| #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL) |
| if (compiler->args > 2) |
| RET_I16(sizeof(sljit_sw)); |
| else |
| RET(); |
| #else |
| RET(); |
| #endif |
| |
| return SLJIT_SUCCESS; |
| } |
| |
| /* --------------------------------------------------------------------- */ |
| /* Operators */ |
| /* --------------------------------------------------------------------- */ |
| |
| /* Size contains the flags as well. */ |
| static sljit_u8* emit_x86_instruction(struct sljit_compiler *compiler, sljit_s32 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_s32 flags = size & ~0xf; |
| sljit_s32 inst_size; |
| |
| /* 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)); |
| /* We don't support (%ebp). */ |
| SLJIT_ASSERT(!(b & SLJIT_MEM) || immb || reg_map[b & REG_MASK] != 5); |
| |
| size &= 0xf; |
| inst_size = size; |
| |
| 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 & REG_MASK) == SLJIT_UNUSED) |
| inst_size += sizeof(sljit_sw); |
| else if (immb != 0 && !(b & OFFS_REG_MASK)) { |
| /* Immediate operand. */ |
| if (immb <= 127 && immb >= -128) |
| inst_size += sizeof(sljit_s8); |
| else |
| inst_size += sizeof(sljit_sw); |
| } |
| |
| if ((b & REG_MASK) == SLJIT_SP && !(b & OFFS_REG_MASK)) |
| b |= TO_OFFS_REG(SLJIT_SP); |
| |
| if ((b & OFFS_REG_MASK) != SLJIT_UNUSED) |
| inst_size += 1; /* SIB byte. */ |
| } |
| |
| /* Calculate size of a. */ |
| 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 &= 0x1f; |
| 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_sw); |
| } |
| else |
| SLJIT_ASSERT(!(flags & EX86_SHIFT_INS) || a == SLJIT_PREF_SHIFT_REG); |
| |
| 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; |
| |
| 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 = reg_map[a] << 3; |
| else |
| *buf_ptr = 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++ |= MOD_REG + ((!(flags & EX86_SSE2_OP2)) ? reg_map[b] : b); |
| else if ((b & REG_MASK) != SLJIT_UNUSED) { |
| if ((b & OFFS_REG_MASK) == SLJIT_UNUSED || (b & OFFS_REG_MASK) == TO_OFFS_REG(SLJIT_SP)) { |
| if (immb != 0) { |
| if (immb <= 127 && immb >= -128) |
| *buf_ptr |= 0x40; |
| else |
| *buf_ptr |= 0x80; |
| } |
| |
| if ((b & OFFS_REG_MASK) == SLJIT_UNUSED) |
| *buf_ptr++ |= reg_map[b & REG_MASK]; |
| else { |
| *buf_ptr++ |= 0x04; |
| *buf_ptr++ = reg_map[b & REG_MASK] | (reg_map[OFFS_REG(b)] << 3); |
| } |
| |
| if (immb != 0) { |
| if (immb <= 127 && immb >= -128) |
| *buf_ptr++ = immb; /* 8 bit displacement. */ |
| else { |
| sljit_unaligned_store_sw(buf_ptr, immb); /* 32 bit displacement. */ |
| buf_ptr += sizeof(sljit_sw); |
| } |
| } |
| } |
| else { |
| *buf_ptr++ |= 0x04; |
| *buf_ptr++ = reg_map[b & REG_MASK] | (reg_map[OFFS_REG(b)] << 3) | (immb << 6); |
| } |
| } |
| else { |
| *buf_ptr++ |= 0x05; |
| sljit_unaligned_store_sw(buf_ptr, immb); /* 32 bit displacement. */ |
| buf_ptr += sizeof(sljit_sw); |
| } |
| |
| if (a & SLJIT_IMM) { |
| if (flags & EX86_BYTE_ARG) |
| *buf_ptr = imma; |
| else if (flags & EX86_HALF_ARG) |
| sljit_unaligned_store_s16(buf_ptr, imma); |
| else if (!(flags & EX86_SHIFT_INS)) |
| sljit_unaligned_store_sw(buf_ptr, imma); |
| } |
| |
| return !(flags & EX86_SHIFT_INS) ? inst : (inst + 1); |
| } |
| |
| /* --------------------------------------------------------------------- */ |
| /* Call / return instructions */ |
| /* --------------------------------------------------------------------- */ |
| |
| #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL) |
| |
| static sljit_s32 c_fast_call_get_stack_size(sljit_s32 arg_types, sljit_s32 *word_arg_count_ptr) |
| { |
| sljit_s32 stack_size = 0; |
| sljit_s32 word_arg_count = 0; |
| |
| arg_types >>= SLJIT_DEF_SHIFT; |
| |
| while (arg_types) { |
| switch (arg_types & SLJIT_DEF_MASK) { |
| case SLJIT_ARG_TYPE_F32: |
| stack_size += sizeof(sljit_f32); |
| break; |
| case SLJIT_ARG_TYPE_F64: |
| stack_size += sizeof(sljit_f64); |
| break; |
| default: |
| word_arg_count++; |
| if (word_arg_count > 2) |
| stack_size += sizeof(sljit_sw); |
| break; |
| } |
| |
| arg_types >>= SLJIT_DEF_SHIFT; |
| } |
| |
| if (word_arg_count_ptr) |
| *word_arg_count_ptr = word_arg_count; |
| |
| return stack_size; |
| } |
| |
| static sljit_s32 c_fast_call_with_args(struct sljit_compiler *compiler, |
| sljit_s32 arg_types, sljit_s32 stack_size, sljit_s32 word_arg_count, sljit_s32 swap_args) |
| { |
| sljit_u8 *inst; |
| sljit_s32 float_arg_count; |
| |
| if (stack_size == sizeof(sljit_sw) && word_arg_count == 3) { |
| inst = (sljit_u8*)ensure_buf(compiler, 1 + 1); |
| FAIL_IF(!inst); |
| INC_SIZE(1); |
| PUSH_REG(reg_map[SLJIT_R2]); |
| } |
| else if (stack_size > 0) { |
| if (word_arg_count >= 4) |
| EMIT_MOV(compiler, TMP_REG1, 0, SLJIT_MEM1(SLJIT_SP), compiler->saveds_offset - sizeof(sljit_sw)); |
| |
| FAIL_IF(emit_non_cum_binary(compiler, BINARY_OPCODE(SUB), |
| SLJIT_SP, 0, SLJIT_SP, 0, SLJIT_IMM, stack_size)); |
| |
| stack_size = 0; |
| arg_types >>= SLJIT_DEF_SHIFT; |
| word_arg_count = 0; |
| float_arg_count = 0; |
| while (arg_types) { |
| switch (arg_types & SLJIT_DEF_MASK) { |
| case SLJIT_ARG_TYPE_F32: |
| float_arg_count++; |
| FAIL_IF(emit_sse2_store(compiler, 1, SLJIT_MEM1(SLJIT_SP), stack_size, float_arg_count)); |
| stack_size += sizeof(sljit_f32); |
| break; |
| case SLJIT_ARG_TYPE_F64: |
| float_arg_count++; |
| FAIL_IF(emit_sse2_store(compiler, 0, SLJIT_MEM1(SLJIT_SP), stack_size, float_arg_count)); |
| stack_size += sizeof(sljit_f64); |
| break; |
| default: |
| word_arg_count++; |
| if (word_arg_count == 3) { |
| EMIT_MOV(compiler, SLJIT_MEM1(SLJIT_SP), stack_size, SLJIT_R2, 0); |
| stack_size += sizeof(sljit_sw); |
| } |
| else if (word_arg_count == 4) { |
| EMIT_MOV(compiler, SLJIT_MEM1(SLJIT_SP), stack_size, TMP_REG1, 0); |
| stack_size += sizeof(sljit_sw); |
| } |
| break; |
| } |
| |
| arg_types >>= SLJIT_DEF_SHIFT; |
| } |
| } |
| |
| if (word_arg_count > 0) { |
| if (swap_args) { |
| inst = (sljit_u8*)ensure_buf(compiler, 1 + 1); |
| FAIL_IF(!inst); |
| INC_SIZE(1); |
| |
| *inst++ = XCHG_EAX_r | reg_map[SLJIT_R2]; |
| } |
| else { |
| inst = (sljit_u8*)ensure_buf(compiler, 1 + 2); |
| FAIL_IF(!inst); |
| INC_SIZE(2); |
| |
| *inst++ = MOV_r_rm; |
| *inst++ = MOD_REG | (reg_map[SLJIT_R2] << 3) | reg_map[SLJIT_R0]; |
| } |
| } |
| |
| return SLJIT_SUCCESS; |
| } |
| |
| #endif |
| |
| static sljit_s32 cdecl_call_get_stack_size(struct sljit_compiler *compiler, sljit_s32 arg_types, sljit_s32 *word_arg_count_ptr) |
| { |
| sljit_s32 stack_size = 0; |
| sljit_s32 word_arg_count = 0; |
| |
| arg_types >>= SLJIT_DEF_SHIFT; |
| |
| while (arg_types) { |
| switch (arg_types & SLJIT_DEF_MASK) { |
| case SLJIT_ARG_TYPE_F32: |
| stack_size += sizeof(sljit_f32); |
| break; |
| case SLJIT_ARG_TYPE_F64: |
| stack_size += sizeof(sljit_f64); |
| break; |
| default: |
| word_arg_count++; |
| stack_size += sizeof(sljit_sw); |
| break; |
| } |
| |
| arg_types >>= SLJIT_DEF_SHIFT; |
| } |
| |
| if (word_arg_count_ptr) |
| *word_arg_count_ptr = word_arg_count; |
| |
| if (stack_size <= compiler->stack_tmp_size) |
| return 0; |
| |
| #if defined(__APPLE__) |
| return ((stack_size - compiler->stack_tmp_size + 15) & ~15); |
| #else |
| return stack_size - compiler->stack_tmp_size; |
| #endif |
| } |
| |
| static sljit_s32 cdecl_call_with_args(struct sljit_compiler *compiler, |
| sljit_s32 arg_types, sljit_s32 stack_size, sljit_s32 word_arg_count) |
| { |
| sljit_s32 float_arg_count = 0; |
| |
| if (word_arg_count >= 4) |
| EMIT_MOV(compiler, TMP_REG1, 0, SLJIT_MEM1(SLJIT_SP), compiler->saveds_offset - sizeof(sljit_sw)); |
| |
| if (stack_size > 0) |
| FAIL_IF(emit_non_cum_binary(compiler, BINARY_OPCODE(SUB), |
| SLJIT_SP, 0, SLJIT_SP, 0, SLJIT_IMM, stack_size)); |
| |
| stack_size = 0; |
| word_arg_count = 0; |
| arg_types >>= SLJIT_DEF_SHIFT; |
| |
| while (arg_types) { |
| switch (arg_types & SLJIT_DEF_MASK) { |
| case SLJIT_ARG_TYPE_F32: |
| float_arg_count++; |
| FAIL_IF(emit_sse2_store(compiler, 1, SLJIT_MEM1(SLJIT_SP), stack_size, float_arg_count)); |
| stack_size += sizeof(sljit_f32); |
| break; |
| case SLJIT_ARG_TYPE_F64: |
| float_arg_count++; |
| FAIL_IF(emit_sse2_store(compiler, 0, SLJIT_MEM1(SLJIT_SP), stack_size, float_arg_count)); |
| stack_size += sizeof(sljit_f64); |
| break; |
| default: |
| word_arg_count++; |
| EMIT_MOV(compiler, SLJIT_MEM1(SLJIT_SP), stack_size, (word_arg_count >= 4) ? TMP_REG1 : word_arg_count, 0); |
| stack_size += sizeof(sljit_sw); |
| break; |
| } |
| |
| arg_types >>= SLJIT_DEF_SHIFT; |
| } |
| |
| return SLJIT_SUCCESS; |
| } |
| |
| static sljit_s32 post_call_with_args(struct sljit_compiler *compiler, |
| sljit_s32 arg_types, sljit_s32 stack_size) |
| { |
| sljit_u8 *inst; |
| sljit_s32 single; |
| |
| if (stack_size > 0) |
| FAIL_IF(emit_cum_binary(compiler, BINARY_OPCODE(ADD), |
| SLJIT_SP, 0, SLJIT_SP, 0, SLJIT_IMM, stack_size)); |
| |
| if ((arg_types & SLJIT_DEF_MASK) < SLJIT_ARG_TYPE_F32) |
| return SLJIT_SUCCESS; |
| |
| single = ((arg_types & SLJIT_DEF_MASK) == SLJIT_ARG_TYPE_F32); |
| |
| inst = (sljit_u8*)ensure_buf(compiler, 1 + 3); |
| FAIL_IF(!inst); |
| INC_SIZE(3); |
| inst[0] = single ? FSTPS : FSTPD; |
| inst[1] = (0x03 << 3) | 0x04; |
| inst[2] = (0x04 << 3) | reg_map[SLJIT_SP]; |
| |
| return emit_sse2_load(compiler, single, SLJIT_FR0, SLJIT_MEM1(SLJIT_SP), 0); |
| } |
| |
| SLJIT_API_FUNC_ATTRIBUTE struct sljit_jump* sljit_emit_call(struct sljit_compiler *compiler, sljit_s32 type, |
| sljit_s32 arg_types) |
| { |
| struct sljit_jump *jump; |
| sljit_s32 stack_size = 0; |
| sljit_s32 word_arg_count; |
| |
| CHECK_ERROR_PTR(); |
| CHECK_PTR(check_sljit_emit_call(compiler, type, arg_types)); |
| |
| #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL) |
| if ((type & 0xff) == SLJIT_CALL) { |
| stack_size = c_fast_call_get_stack_size(arg_types, &word_arg_count); |
| PTR_FAIL_IF(c_fast_call_with_args(compiler, arg_types, stack_size, word_arg_count, 0)); |
| |
| #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \ |
| || (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS) |
| compiler->skip_checks = 1; |
| #endif |
| |
| jump = sljit_emit_jump(compiler, type); |
| PTR_FAIL_IF(jump == NULL); |
| |
| PTR_FAIL_IF(post_call_with_args(compiler, arg_types, 0)); |
| return jump; |
| } |
| #endif |
| |
| stack_size = cdecl_call_get_stack_size(compiler, arg_types, &word_arg_count); |
| PTR_FAIL_IF(cdecl_call_with_args(compiler, arg_types, stack_size, word_arg_count)); |
| |
| #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \ |
| || (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS) |
| compiler->skip_checks = 1; |
| #endif |
| |
| jump = sljit_emit_jump(compiler, type); |
| PTR_FAIL_IF(jump == NULL); |
| |
| PTR_FAIL_IF(post_call_with_args(compiler, arg_types, stack_size)); |
| return jump; |
| } |
| |
| 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) |
| { |
| sljit_s32 stack_size = 0; |
| sljit_s32 word_arg_count; |
| #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL) |
| sljit_s32 swap_args; |
| #endif |
| |
| CHECK_ERROR(); |
| CHECK(check_sljit_emit_icall(compiler, type, arg_types, src, srcw)); |
| |
| #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL) |
| SLJIT_ASSERT(reg_map[SLJIT_R0] == 0 && reg_map[SLJIT_R2] == 1 && SLJIT_R0 == 1 && SLJIT_R2 == 3); |
| |
| if ((type & 0xff) == SLJIT_CALL) { |
| stack_size = c_fast_call_get_stack_size(arg_types, &word_arg_count); |
| swap_args = 0; |
| |
| if (word_arg_count > 0) { |
| if ((src & REG_MASK) == SLJIT_R2 || OFFS_REG(src) == SLJIT_R2) { |
| swap_args = 1; |
| if (((src & REG_MASK) | 0x2) == SLJIT_R2) |
| src ^= 0x2; |
| if ((OFFS_REG(src) | 0x2) == SLJIT_R2) |
| src ^= TO_OFFS_REG(0x2); |
| } |
| } |
| |
| FAIL_IF(c_fast_call_with_args(compiler, arg_types, stack_size, word_arg_count, swap_args)); |
| |
| compiler->saveds_offset += stack_size; |
| compiler->locals_offset += stack_size; |
| |
| #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \ |
| || (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS) |
| compiler->skip_checks = 1; |
| #endif |
| FAIL_IF(sljit_emit_ijump(compiler, type, src, srcw)); |
| |
| compiler->saveds_offset -= stack_size; |
| compiler->locals_offset -= stack_size; |
| |
| return post_call_with_args(compiler, arg_types, 0); |
| } |
| #endif |
| |
| stack_size = cdecl_call_get_stack_size(compiler, arg_types, &word_arg_count); |
| FAIL_IF(cdecl_call_with_args(compiler, arg_types, stack_size, word_arg_count)); |
| |
| compiler->saveds_offset += stack_size; |
| compiler->locals_offset += stack_size; |
| |
| #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \ |
| || (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS) |
| compiler->skip_checks = 1; |
| #endif |
| FAIL_IF(sljit_emit_ijump(compiler, type, src, srcw)); |
| |
| compiler->saveds_offset -= stack_size; |
| compiler->locals_offset -= stack_size; |
| |
| return post_call_with_args(compiler, arg_types, stack_size); |
| } |
| |
| 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); |
| |
| CHECK_EXTRA_REGS(dst, dstw, (void)0); |
| |
| /* For UNUSED dst. Uncommon, but possible. */ |
| if (dst == SLJIT_UNUSED) |
| dst = TMP_REG1; |
| |
| if (FAST_IS_REG(dst)) { |
| /* Unused dest is possible here. */ |
| inst = (sljit_u8*)ensure_buf(compiler, 1 + 1); |
| FAIL_IF(!inst); |
| |
| INC_SIZE(1); |
| POP_REG(reg_map[dst]); |
| return SLJIT_SUCCESS; |
| } |
| |
| /* Memory. */ |
| 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; |
| |
| CHECK_EXTRA_REGS(src, srcw, (void)0); |
| |
| if (FAST_IS_REG(src)) { |
| inst = (sljit_u8*)ensure_buf(compiler, 1 + 1 + 1); |
| FAIL_IF(!inst); |
| |
| INC_SIZE(1 + 1); |
| PUSH_REG(reg_map[src]); |
| } |
| else { |
| 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; |
| } |
| |
| static sljit_s32 skip_frames_before_return(struct sljit_compiler *compiler) |
| { |
| sljit_s32 size, saved_size; |
| sljit_s32 has_f64_aligment; |
| |
| /* Don't adjust shadow stack if it isn't enabled. */ |
| if (!cpu_has_shadow_stack ()) |
| return SLJIT_SUCCESS; |
| |
| SLJIT_ASSERT(compiler->args >= 0); |
| SLJIT_ASSERT(compiler->local_size > 0); |
| |
| #if !defined(__APPLE__) |
| has_f64_aligment = compiler->options & SLJIT_F64_ALIGNMENT; |
| #else |
| has_f64_aligment = 0; |
| #endif |
| |
| size = compiler->local_size; |
| saved_size = (1 + (compiler->scratches > 9 ? (compiler->scratches - 9) : 0) + (compiler->saveds <= 3 ? compiler->saveds : 3)) * sizeof(sljit_uw); |
| if (has_f64_aligment) { |
| /* mov TMP_REG1, [esp + local_size]. */ |
| EMIT_MOV(compiler, TMP_REG1, 0, SLJIT_MEM1(SLJIT_SP), size); |
| /* mov TMP_REG1, [TMP_REG1+ saved_size]. */ |
| EMIT_MOV(compiler, TMP_REG1, 0, SLJIT_MEM1(TMP_REG1), saved_size); |
| /* Move return address to [esp]. */ |
| EMIT_MOV(compiler, SLJIT_MEM1(SLJIT_SP), 0, TMP_REG1, 0); |
| size = 0; |
| } else |
| size += saved_size; |
| |
| return adjust_shadow_stack(compiler, SLJIT_UNUSED, 0, SLJIT_SP, size); |
| } |