--- /dev/null
+/*
+ * 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. */
+
+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++ = MOV_r_i32 + (reg_map[reg] & 0x7);
+ 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_s32 type)
+{
+ 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++ = 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, jump->u.target);
+
+ code_ptr += short_addr ? sizeof(sljit_s32) : sizeof(sljit_sw);
+
+ *code_ptr++ = REX_B;
+ *code_ptr++ = GROUP_FF;
+ *code_ptr++ = MOD_REG | (type >= SLJIT_FAST_CALL ? CALL_rm : JMP_rm) | reg_lmap[TMP_REG2];
+
+ 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, i, tmp, size, saved_register_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);
+
+ compiler->mode32 = 0;
+
+#ifdef _WIN64
+ /* Two/four register slots for parameters plus space for xmm6 register if needed. */
+ if (fscratches >= 6 || fsaveds >= 1)
+ compiler->locals_offset = 6 * sizeof(sljit_sw);
+ else
+ compiler->locals_offset = ((scratches > 2) ? 4 : 2) * sizeof(sljit_sw);
+#endif
+
+ /* Including the return address saved by the call instruction. */
+ saved_register_size = GET_SAVED_REGISTERS_SIZE(scratches, saveds, 1);
+
+ tmp = saveds < SLJIT_NUMBER_OF_SAVED_REGISTERS ? (SLJIT_S0 + 1 - saveds) : SLJIT_FIRST_SAVED_REG;
+ 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]);
+ }
+
+ args = get_arg_count(arg_types);
+
+ if (args > 0) {
+ size = args * 3;
+ inst = (sljit_u8*)ensure_buf(compiler, 1 + size);
+ FAIL_IF(!inst);
+
+ INC_SIZE(size);
+
+#ifndef _WIN64
+ if (args > 0) {
+ inst[0] = REX_W;
+ inst[1] = MOV_r_rm;
+ inst[2] = MOD_REG | (reg_map[SLJIT_S0] << 3) | 0x7 /* rdi */;
+ inst += 3;
+ }
+ if (args > 1) {
+ inst[0] = REX_W | REX_R;
+ inst[1] = MOV_r_rm;
+ inst[2] = MOD_REG | (reg_lmap[SLJIT_S1] << 3) | 0x6 /* rsi */;
+ inst += 3;
+ }
+ if (args > 2) {
+ inst[0] = REX_W | REX_R;
+ inst[1] = MOV_r_rm;
+ inst[2] = MOD_REG | (reg_lmap[SLJIT_S2] << 3) | 0x2 /* rdx */;
+ }
+#else
+ if (args > 0) {
+ inst[0] = REX_W;
+ inst[1] = MOV_r_rm;
+ inst[2] = MOD_REG | (reg_map[SLJIT_S0] << 3) | 0x1 /* rcx */;
+ inst += 3;
+ }
+ if (args > 1) {
+ inst[0] = REX_W;
+ inst[1] = MOV_r_rm;
+ inst[2] = MOD_REG | (reg_map[SLJIT_S1] << 3) | 0x2 /* rdx */;
+ inst += 3;
+ }
+ if (args > 2) {
+ inst[0] = REX_W | REX_B;
+ inst[1] = MOV_r_rm;
+ inst[2] = MOD_REG | (reg_map[SLJIT_S2] << 3) | 0x0 /* r8 */;
+ }
+#endif
+ }
+
+ local_size = ((local_size + SLJIT_LOCALS_OFFSET + saved_register_size + 15) & ~15) - saved_register_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, SLJIT_R0, 0, SLJIT_SP, 0);
+ EMIT_MOV(compiler, TMP_REG1, 0, SLJIT_IMM, (local_size - 1) >> 12);
+
+ SLJIT_ASSERT (reg_map[SLJIT_R0] == 0);
+
+ EMIT_MOV(compiler, TMP_REG2, 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),
+ TMP_REG1, 0, TMP_REG1, 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) -19;
+ }
+
+ EMIT_MOV(compiler, TMP_REG1, 0, SLJIT_MEM1(SLJIT_SP), -local_size);
+ }
+#endif
+
+ if (local_size > 0) {
+ FAIL_IF(emit_non_cum_binary(compiler, BINARY_OPCODE(SUB),
+ SLJIT_SP, 0, SLJIT_SP, 0, SLJIT_IMM, local_size));
+ }
+
+#ifdef _WIN64
+ /* Save xmm6 register: movaps [rsp + 0x20], xmm6 */
+ if (fscratches >= 6 || fsaveds >= 1) {
+ inst = (sljit_u8*)ensure_buf(compiler, 1 + 5);
+ FAIL_IF(!inst);
+ INC_SIZE(5);
+ *inst++ = GROUP_0F;
+ sljit_unaligned_store_s32(inst, 0x20247429);
+ }
+#endif
+
+ 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_register_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);
+
+#ifdef _WIN64
+ /* Two/four register slots for parameters plus space for xmm6 register if needed. */
+ if (fscratches >= 6 || fsaveds >= 1)
+ compiler->locals_offset = 6 * sizeof(sljit_sw);
+ else
+ compiler->locals_offset = ((scratches > 2) ? 4 : 2) * sizeof(sljit_sw);
+#endif
+
+ /* Including the return address saved by the call instruction. */
+ saved_register_size = GET_SAVED_REGISTERS_SIZE(scratches, saveds, 1);
+ compiler->local_size = ((local_size + SLJIT_LOCALS_OFFSET + saved_register_size + 15) & ~15) - saved_register_size;
+ 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 i, tmp, size;
+ sljit_u8 *inst;
+
+ CHECK_ERROR();
+ CHECK(check_sljit_emit_return(compiler, op, src, srcw));
+
+ FAIL_IF(emit_mov_before_return(compiler, op, src, srcw));
+
+#ifdef _WIN64
+ /* Restore xmm6 register: movaps xmm6, [rsp + 0x20] */
+ if (compiler->fscratches >= 6 || compiler->fsaveds >= 1) {
+ inst = (sljit_u8*)ensure_buf(compiler, 1 + 5);
+ FAIL_IF(!inst);
+ INC_SIZE(5);
+ *inst++ = GROUP_0F;
+ sljit_unaligned_store_s32(inst, 0x20247428);
+ }
+#endif
+
+ 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 = 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]);
+ }
+
+ inst = (sljit_u8*)ensure_buf(compiler, 1 + 1);
+ FAIL_IF(!inst);
+ INC_SIZE(1);
+ RET();
+ return SLJIT_SUCCESS;
+}
+
+/* --------------------------------------------------------------------- */
+/* Operators */
+/* --------------------------------------------------------------------- */
+
+static sljit_s32 emit_do_imm32(struct sljit_compiler *compiler, sljit_u8 rex, sljit_u8 opcode, sljit_sw imm)
+{
+ sljit_u8 *inst;
+ sljit_s32 length = 1 + (rex ? 1 : 0) + 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, imm);
+ return SLJIT_SUCCESS;
+}
+
+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_u8 rex = 0;
+ sljit_s32 flags = size & ~0xf;
+ sljit_s32 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) == SLJIT_UNUSED)
+ 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) != SLJIT_UNUSED) {
+ 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 = reg_lmap[a] << 3;
+ else
+ *buf_ptr = 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++ |= MOD_REG + ((!(flags & EX86_SSE2_OP2)) ? reg_lmap[b] : freg_lmap[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 || reg_lmap[b & REG_MASK] == 5) {
+ if (immb <= 127 && immb >= -128)
+ *buf_ptr |= 0x40;
+ else
+ *buf_ptr |= 0x80;
+ }
+
+ if ((b & OFFS_REG_MASK) == SLJIT_UNUSED)
+ *buf_ptr++ |= reg_lmap[b & REG_MASK];
+ else {
+ *buf_ptr++ |= 0x04;
+ *buf_ptr++ = reg_lmap[b & REG_MASK] | (reg_lmap[OFFS_REG(b)] << 3);
+ }
+
+ if (immb != 0 || reg_lmap[b & REG_MASK] == 5) {
+ if (immb <= 127 && immb >= -128)
+ *buf_ptr++ = immb; /* 8 bit displacement. */
+ else {
+ sljit_unaligned_store_s32(buf_ptr, immb); /* 32 bit displacement. */
+ buf_ptr += sizeof(sljit_s32);
+ }
+ }
+ }
+ else {
+ if (reg_lmap[b & REG_MASK] == 5)
+ *buf_ptr |= 0x40;
+ *buf_ptr++ |= 0x04;
+ *buf_ptr++ = reg_lmap[b & REG_MASK] | (reg_lmap[OFFS_REG(b)] << 3) | (immb << 6);
+ if (reg_lmap[b & REG_MASK] == 5)
+ *buf_ptr++ = 0;
+ }
+ }
+ else {
+ *buf_ptr++ |= 0x04;
+ *buf_ptr++ = 0x25;
+ sljit_unaligned_store_s32(buf_ptr, immb); /* 32 bit displacement. */
+ buf_ptr += sizeof(sljit_s32);
+ }
+
+ 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_s32(buf_ptr, imma);
+ }
+
+ return !(flags & EX86_SHIFT_INS) ? inst : (inst + 1);
+}
+
+/* --------------------------------------------------------------------- */
+/* Call / return instructions */
+/* --------------------------------------------------------------------- */
+
+#ifndef _WIN64
+
+static sljit_s32 call_with_args(struct sljit_compiler *compiler, sljit_s32 arg_types, sljit_s32 *src_ptr, sljit_sw srcw)
+{
+ 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);
+
+ compiler->mode32 = 0;
+
+ /* Remove return value. */
+ arg_types >>= SLJIT_DEF_SHIFT;
+
+ while (arg_types) {
+ if ((arg_types & SLJIT_DEF_MASK) < SLJIT_ARG_TYPE_F32)
+ word_arg_count++;
+ arg_types >>= SLJIT_DEF_SHIFT;
+ }
+
+ if (word_arg_count == 0)
+ return SLJIT_SUCCESS;
+
+ if (src & SLJIT_MEM) {
+ ADJUST_LOCAL_OFFSET(src, srcw);
+ EMIT_MOV(compiler, TMP_REG2, 0, src, srcw);
+ *src_ptr = TMP_REG2;
+ }
+ else if (src == SLJIT_R2 && word_arg_count >= SLJIT_R2)
+ *src_ptr = TMP_REG1;
+
+ if (word_arg_count >= 3)
+ 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_sw srcw)
+{
+ 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);
+
+ compiler->mode32 = 0;
+ arg_types >>= SLJIT_DEF_SHIFT;
+
+ while (arg_types) {
+ types = (types << SLJIT_DEF_SHIFT) | (arg_types & SLJIT_DEF_MASK);
+
+ switch (arg_types & SLJIT_DEF_MASK) {
+ case SLJIT_ARG_TYPE_F32:
+ case SLJIT_ARG_TYPE_F64:
+ 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_DEF_SHIFT;
+ }
+
+ if (!data_trandfer)
+ return SLJIT_SUCCESS;
+
+ if (src & SLJIT_MEM) {
+ ADJUST_LOCAL_OFFSET(src, srcw);
+ EMIT_MOV(compiler, TMP_REG2, 0, src, srcw);
+ *src_ptr = TMP_REG2;
+ }
+
+ while (types) {
+ switch (types & SLJIT_DEF_MASK) {
+ 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;
+ 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;
+ 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_DEF_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));
+
+ PTR_FAIL_IF(call_with_args(compiler, arg_types, NULL, 0));
+
+#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));
+
+ FAIL_IF(call_with_args(compiler, arg_types, &src, srcw));
+
+#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);
+
+ /* For UNUSED dst. Uncommon, but possible. */
+ if (dst == SLJIT_UNUSED)
+ dst = TMP_REG1;
+
+ 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;
+}
+
+SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_fast_return(struct sljit_compiler *compiler, sljit_s32 src, sljit_sw srcw)
+{
+ sljit_u8 *inst;
+
+ CHECK_ERROR();
+ CHECK(check_sljit_emit_fast_return(compiler, src, srcw));
+ ADJUST_LOCAL_OFFSET(src, srcw);
+
+ 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 (dst == SLJIT_UNUSED && !(src & SLJIT_MEM))
+ return SLJIT_SUCCESS; /* Empty instruction. */
+
+ 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;
+}
projects / ossec-hids.git / blobdiff