--- /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 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_s32 type, sljit_sw executable_offset)
+{
+ 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);
+
+ 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 > 7 ? (compiler->scratches - 7) : 0) +
+ (compiler->saveds <= 3 ? compiler->saveds : 3);
+#if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL)
+ if (compiler->args > 2)
+ size += 2;
+#else
+ if (compiler->args > 0)
+ 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));
+
+ 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;
+}
+
+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);
+
+ 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;
+}
projects / ossec-hids.git / blobdiff