1 files changed, 679 insertions, 39 deletions

diff --git a/masm/asm.c b/masm/asm.c
index 099bfe6..54d766b 100644
--- a/masm/asm.c
+++ b/masm/asm.c
@@ -1,77 +1,717 @@
 #include <merror.h>
+#include <mips.h>
+#include <stdio.h>
 #include <stdlib.h>
+#include <elf.h>
+#include <string.h>
+#include <stddef.h>
 
 #include "asm.h"
+#include "mlimits.h"
+#include "parse.h"
 
-int assembler_init(struct assembler *assembler, const char *path)
+extern char *current_file;
+
+#define SYMSEC_STUB -1
+#define SYMSEC_EXTERN -1
+
+static int create_symbol(struct assembler *assembler,
+			 const char name[MAX_LEX_LENGTH],
+			 ssize_t section_idx,
+			 size_t section_offset,
+			 unsigned char bind)
 {
-	if (lexer_init(path, &assembler->lexer))
+	size_t str_off;
+	if (strtab_write_str(&assembler->strtab, name, &str_off))
+		return M_ERROR;
+
+	Elf32_Sym symbol = {
+		.st_name = str_off,
+		.st_value = section_offset,
+		.st_size = 0,
+		.st_info = ELF32_ST_INFO(bind, STT_NOTYPE),
+		.st_other = ELF32_ST_VISIBILITY(STV_DEFAULT),
+		.st_shndx = section_idx,
+	};
+
+	// dont put magic flag values inside symbol, only real indexes
+	if (section_idx < 0)
+		symbol.st_shndx = 0;
+
+	if (symtab_push(&assembler->symtab, symbol, section_idx))
+		return M_ERROR;
+
+	return M_SUCCESS;
+}
+
+static int find_symbol_or_stub(struct assembler *assembler,
+			       const char name[MAX_LEX_LENGTH],
+			       Elf32_Sym **res,
+			       size_t *res2)
+{
+	if (symtab_find(&assembler->symtab, res, res2, name) == M_SUCCESS)
+		return M_SUCCESS;
+
+	if (create_symbol(assembler, name, SYMSEC_STUB, 0, STB_LOCAL))
+		return M_ERROR;
+
+	size_t idx = assembler->symtab.len - 1;
+
+	if (res != NULL)
+		*res = &assembler->symtab.symbols[idx];
+	if (res2 != NULL)
+		*res2 = idx;
+
+	return M_SUCCESS;
+}
+
+static int handle_directive(struct assembler *assembler,
+			    struct mips_directive *directive)
+{
+	switch (directive->type) {
+	case MIPS_DIRECTIVE_SECTION: {
+		struct section_table *sec_tbl = &assembler->sectab;
+		struct section *sec;
+		if (sectab_get(sec_tbl, &sec, directive->name)
+				== M_SUCCESS) {
+			sec_tbl->current = sec;
+			break;
+		}
+
+		if (sectab_alloc(sec_tbl, &sec, directive->name))
+			return M_ERROR;
+
+		sec_tbl->current = sec;
+		break;
+	}
+
+	case MIPS_DIRECTIVE_ALIGN: {
+		assembler->sectab.current->alignment =
+			1 << directive->align;
+		break;
+	}
+
+	case MIPS_DIRECTIVE_SPACE: {
+		struct section_entry entry;
+		entry.type = ENT_NO_DATA;
+		entry.size = directive->space;
+		if (sec_push(assembler->sectab.current, entry))
+				return M_ERROR;
+		break;
+	}
+
+	case MIPS_DIRECTIVE_WORD: {
+		for (uint32_t i = 0; i < directive->len; i++) {
+			struct section_entry entry;
+			entry.type = ENT_WORD;
+			entry.word = directive->words[i];
+			if (sec_push(assembler->sectab.current,
+				entry))
+				return M_ERROR;
+		}
+		break;
+	}
+
+	case MIPS_DIRECTIVE_HALF: {
+		for (uint32_t i = 0; i < directive->len; i++) {
+			struct section_entry entry;
+			entry.type = ENT_HALF;
+			entry.half = directive->halfs[i];
+			if (sec_push(assembler->sectab.current,
+				entry))
+				return M_ERROR;
+		}
+		break;
+	}
+
+	case MIPS_DIRECTIVE_BYTE: {
+		for (uint32_t i = 0; i < directive->len; i++) {
+			struct section_entry entry;
+			entry.type = ENT_BYTE;
+			entry.byte = directive->bytes[i];
+			if (sec_push(assembler->sectab.current,
+				entry))
+				return M_ERROR;
+		}
+		break;
+	}
+
+        case MIPS_DIRECTIVE_EXTERN: {
+		if (symtab_find(&assembler->symtab, NULL, NULL,
+			directive->name) == M_SUCCESS) {
+			ERROR("cannot extern local symbol '%s'",
+				directive->name);
+			return M_ERROR;
+		}
+
+		if (create_symbol(assembler, directive->name, SYMSEC_EXTERN, 0,
+		    STB_GLOBAL))
+			return M_ERROR;
+
+		break;
+	}
+
+        case MIPS_DIRECTIVE_GLOBL: {
+		Elf32_Sym *sym;
+		if (symtab_find(&assembler->symtab, &sym, NULL,
+			directive->name) == M_SUCCESS) {
+			sym->st_info = ELF32_ST_INFO(STB_GLOBAL, STT_NOTYPE);
+			break;
+		}
+
+		if (create_symbol(assembler, directive->name, SYMSEC_STUB, 0,
+			STB_GLOBAL))
+			return M_ERROR;
+
+		break;
+	}
+        }
+
+        return M_SUCCESS;
+}
+
+static int handle_label(struct assembler *assembler,
+			const char name[MAX_LEX_LENGTH])
+{
+	struct section *cur = assembler->sectab.current;
+
+	Elf32_Sym *ref;
+	size_t symidx;
+
+	if (symtab_find(&assembler->symtab, &ref, &symidx, name) == M_SUCCESS) {
+		ssize_t *sec = &assembler->symtab.sections[symidx];
+
+		// check if the symbol is acutally jus a stub, if so
+		// we need to update it
+		if (*sec == SYMSEC_STUB) {
+			*sec = cur->index;
+			ref->st_value = sec_size(cur);
+			return M_SUCCESS;
+		}
+
+		ERROR("redefined symbol '%s'", name);
 		return M_ERROR;
+	}
 
-	if (parser_init(&assembler->lexer, &assembler->parser)) {
-		lexer_free(&assembler->lexer);
+	if (create_symbol(assembler, name, cur->index, sec_size(cur),
+		   STB_LOCAL))
 		return M_ERROR;
+
+	return M_SUCCESS;
+}
+
+static int handle_ins(struct assembler *assembler,
+		      struct ins_expr *expr)
+{
+	struct section *sec = assembler->sectab.current;
+	size_t secidx = sec->len;
+
+	for (size_t i = 0; i < expr->ins_len; i++) {
+		struct mips_instruction *ins =
+				&expr->ins[i];
+		struct reference *ref =
+				&expr->ref[i];
+		struct section_entry entry;
+
+		entry.type = ENT_INS;
+		entry.size = sizeof(struct mips_instruction);
+		entry.ins = *ins;
+
+		if (sec_push(sec, entry))
+			return M_ERROR;
+
+		unsigned char type = 0;
+		switch (ref->type) {
+		case REF_NONE:
+			continue;
+		case REF_OFFESET:
+			type = R_MIPS_PC16;
+			break;
+		case REF_TARGET:
+			type = R_MIPS_26;
+			break;
+		}
+
+		size_t symidx;
+		if (find_symbol_or_stub(assembler, ref->name, NULL, &symidx))
+			return M_ERROR;
+
+		Elf32_Rela rel = {
+			.r_info = ELF32_R_INFO(symidx, type),
+			.r_addend = ref->addend,
+			.r_offset = sec_index(sec, secidx + i),
+		};
+
+		if (reltab_push(&sec->reltab, rel))
+			return M_ERROR;
+
+		break;
+	}
+
+	return M_SUCCESS;
+}
+
+static int parse_file(struct assembler *assembler)
+{
+	struct parser *parser = &assembler->parser;
+
+	while (1) {
+		struct expr expr;
+		int res = parser_next(parser, &expr);
+
+		if (res == M_ERROR)
+			return M_ERROR;
+
+		if (res == M_EOF)
+			return M_SUCCESS;
+
+		switch (expr.type) {
+		case EXPR_INS:
+			if (handle_ins(assembler, &expr.ins))
+				return M_ERROR;
+			break;
+		case EXPR_DIRECTIVE:
+			if (handle_directive(assembler,
+				&expr.directive))
+				return M_ERROR;
+			break;
+
+                case EXPR_LABEL:
+			if (handle_label(assembler, expr.label))
+				return M_ERROR;
+			break;
+
+                case EXPR_CONSTANT:
+			break;
+		}
+	}
+
+	return M_SUCCESS;
+}
+
+static int assemble_phdr(struct assembler *assembler, Elf32_Phdr **res,
+			 uint32_t *res2)
+{
+	Elf32_Phdr *phdr = malloc(sizeof(Elf32_Phdr) *
+				  assembler->sectab.len);
+	if (phdr == NULL) {
+		ERROR("cannot alloc");
+		return M_ERROR;;
+	}
+
+	for (uint32_t i = 0; i < assembler->sectab.len; i++) {
+		Elf32_Phdr *hdr = &phdr[i];
+		struct section *sec = &assembler->sectab.sections[i];
+		size_t size = sec_size(sec);
+		hdr->p_type = PT_LOAD;
+                hdr->p_flags = (sec->execute << 0) |
+			(sec->write << 1) |
+			(sec->read << 2);
+                hdr->p_offset = 0;
+		hdr->p_vaddr = 0;
+		hdr->p_paddr = 0;
+		hdr->p_filesz = size;
+		hdr->p_memsz = size;
+		hdr->p_align = sec->alignment;
+	}
+
+	*res = phdr;
+	*res2 = assembler->sectab.len;
+	return M_SUCCESS;
+}
+
+static int assemble_shdr(struct assembler *assembler, Elf32_Shdr **res,
+			 uint32_t *res2)
+{
+	uint32_t max_entries = 4; // symtab, strtab, shstrtab
+	max_entries += assembler->sectab.len; // sections
+	max_entries += assembler->sectab.len; // reltabs per section
+
+	Elf32_Shdr *shdr = malloc(sizeof(Elf32_Shdr) * max_entries);
+
+	size_t str_off;
+	uint32_t count = 0;
+
+	// eeltables
+	for (uint32_t i = 0; i < assembler->sectab.len; i++) {
+		struct section *sec = &assembler->sectab.sections[i];
+		const char *prefix = ".reltab.";
+		char reltab_name[MAX_LEX_LENGTH + 8];
+
+		if (sec->reltab.len == 0)
+			continue;
+
+		strcpy(reltab_name, prefix);
+		strcat(reltab_name, sec->name);
+
+		if (strtab_write_str(&assembler->shstrtab,
+		       reltab_name, &str_off)) {
+			free(shdr);
+			return M_ERROR;
+		}
+
+		sec->reltab_shidx = count;
+		shdr[count++] = (Elf32_Shdr) {
+			.sh_name = str_off,
+			.sh_type = SHT_RELA,
+			.sh_flags = 0,
+			.sh_addr = 0,
+			.sh_offset = 0,
+			.sh_size = 0,
+			.sh_link = 0,
+			.sh_info = 0,
+			.sh_addralign = 1,
+			.sh_entsize = sizeof(Elf32_Rela),
+		};
 	}
 
-	if (strtbl_init(&assembler->shstr_tbl)) {
-		parser_free(&assembler->parser);
-		lexer_free(&assembler->lexer);
+	// for each section
+	for (uint32_t i = 0; i < assembler->sectab.len; i++) {
+		struct section *sec = &assembler->sectab.sections[i];
+		char name[MAX_LEX_LENGTH+1] = ".";
+
+		strcat(name, sec->name);
+		if (strtab_write_str(&assembler->shstrtab, name, &str_off)) {
+			free(shdr);
+			return M_ERROR;
+		}
+
+		sec->shdr_idx = count;
+		if (sec->reltab.len != 0)
+			shdr[sec->reltab_shidx].sh_info = count;
+
+                shdr[count++] = (Elf32_Shdr){
+                    .sh_name = str_off,
+                    .sh_type = SHT_PROGBITS,
+                    .sh_flags = (sec->write << 0) | (sec->execute << 2) |
+			SHF_ALLOC,
+                    .sh_addr = 0,
+                    .sh_offset = 0,
+                    .sh_size = 0,
+                    .sh_link = 0,
+                    .sh_info = 0,
+                    .sh_addralign = sec->alignment,
+                    .sh_entsize = sizeof(struct mips_instruction),
+                };
+        }
+
+	// symbol table
+	if (strtab_write_str(&assembler->shstrtab, ".symtab", &str_off)) {
+		free(shdr);
 		return M_ERROR;
 	}
 
-	if (strtbl_init(&assembler->str_tbl)) {
-		strtbl_free(&assembler->shstr_tbl);
-		parser_free(&assembler->parser);
-		lexer_free(&assembler->lexer);
+	assembler->symtab_shidx = count;
+	shdr[count++] = (Elf32_Shdr) {
+		.sh_name = str_off,
+		.sh_type = SHT_SYMTAB,
+		.sh_flags = 0,
+		.sh_addr = 0,
+		.sh_offset = 0,
+		.sh_size = 0,
+		.sh_link = 1,
+		.sh_info = 0,
+		.sh_addralign = 1,
+		.sh_entsize = sizeof(Elf32_Sym),
+	};
+
+	// string table
+	if (strtab_write_str(&assembler->shstrtab, ".strtab", &str_off)) {
+		free(shdr);
 		return M_ERROR;
 	}
 
-	if (symtbl_init(&assembler->sym_tbl)) {
-		strtbl_free(&assembler->str_tbl);
-		strtbl_free(&assembler->shstr_tbl);
-		parser_free(&assembler->parser);
-		lexer_free(&assembler->lexer);
+	assembler->strtab_shidx = count;
+	shdr[count++] = (Elf32_Shdr) {
+		.sh_name = str_off,
+		.sh_type = SHT_STRTAB,
+		.sh_flags = SHF_STRINGS,
+		.sh_addr = 0,
+		.sh_offset = 0,
+		.sh_size = 0,
+		.sh_link = 0,
+		.sh_info = 0,
+		.sh_addralign = 1,
+		.sh_entsize = 0,
+	};
+
+	// sh string table
+	if (strtab_write_str(&assembler->shstrtab, ".shstrtab", &str_off)) {
+		free(shdr);
 		return M_ERROR;
 	}
 
-	assembler->meta = NULL;
-	assembler->phdr = NULL;
-	assembler->shdr = NULL;
-	assembler->symtab = NULL;
+	assembler->shstrtab_shidx = count;
+	shdr[count++] = (Elf32_Shdr) {
+		.sh_name = str_off,
+		.sh_type = SHT_STRTAB,
+		.sh_flags = SHF_STRINGS,
+		.sh_addr = 0,
+		.sh_offset = 0,
+		.sh_size = 0,
+		.sh_link = 0,
+		.sh_info = 0,
+		.sh_addralign = 1,
+		.sh_entsize = 0,
+	};
+
+	for (uint32_t i = 0; i < assembler->sectab.len; i++) {
+		struct section *sec = &assembler->sectab.sections[i];
+		if (sec->reltab.len == 0)
+			continue;
+		shdr[sec->reltab_shidx].sh_link =
+			assembler->symtab_shidx;
+	}
+
+	*res = shdr;
+	*res2 = count;
 
 	return M_SUCCESS;
 }
 
-void assembler_free(struct assembler *assembler)
+static void update_offsets(struct assembler *assembler, Elf32_Ehdr *ehdr)
+{
+	Elf32_Shdr *shdr = (Elf32_Shdr *) assembler->shdr;
+	Elf32_Phdr *phdr = (Elf32_Phdr *) assembler->phdr;
+	uint32_t ptr = 0;
+
+	// we must now correct offets and sizes inside the ehdr, phdr,
+	// and shdr
+	ptr += sizeof(Elf32_Ehdr);
+
+	// phdr
+	ehdr->e_phoff = ptr;
+	ptr += assembler->phdr_len * sizeof(Elf32_Phdr);
+
+	// reltbls
+	for (uint32_t i = 0; i < assembler->sectab.len; i++) {
+		struct section *sec = &assembler->sectab.sections[i];
+		if (sec->reltab.len == 0)
+			continue;
+		int idx = sec->reltab_shidx;
+		int len = sec->reltab.len;
+		shdr[idx].sh_offset = ptr;
+		shdr[idx].sh_size = len * sizeof(Elf32_Rela);
+		ptr += len * sizeof(Elf32_Rela);
+	}
+
+	// sections
+	for (uint32_t i = 0; i < assembler->sectab.len; i++) {
+		struct section *sec = &assembler->sectab.sections[i];
+		int idx = sec->shdr_idx;
+		phdr[i].p_offset = ptr;
+		phdr[i].p_vaddr = ptr;
+		phdr[i].p_paddr = ptr;
+		shdr[idx].sh_offset = ptr;
+		shdr[idx].sh_size = phdr[i].p_filesz;
+		shdr[idx].sh_addr = phdr[i].p_vaddr;
+		shdr[idx].sh_addralign = phdr[i].p_align;
+		ptr += phdr[i].p_filesz;
+	}
+
+	// symtab
+	shdr[assembler->symtab_shidx].sh_offset = ptr;
+	shdr[assembler->symtab_shidx].sh_link = assembler->strtab_shidx;
+	shdr[assembler->symtab_shidx].sh_size =
+		assembler->symtab.len * sizeof(Elf32_Sym);
+	ptr += assembler->symtab.len * sizeof(Elf32_Sym);
+
+	// strtab
+	shdr[assembler->strtab_shidx].sh_offset = ptr;
+	shdr[assembler->strtab_shidx].sh_size = assembler->strtab.size;
+	ptr += assembler->strtab.size;
+
+	// shstrtab
+	shdr[assembler->shstrtab_shidx].sh_offset = ptr;
+	shdr[assembler->shstrtab_shidx].sh_size = assembler->shstrtab.size;
+	ptr += assembler->shstrtab.size;
+
+	// shdr
+	ehdr->e_shoff = ptr;
+}
+
+static void update_sym_shindx(struct assembler *assembler)
+{
+	for (size_t i = 0; i < assembler->symtab.len; i++)
+	{
+		Elf32_Sym *sym = &assembler->symtab.symbols[i];
+		ssize_t sec = assembler->symtab.sections[i];
+
+		if (sec >= 0) {
+			sym->st_shndx = assembler->
+				sectab.sections[sec].shdr_idx;
+		}
+	}
+}
+
+static int write_file(struct assembler *assembler, Elf32_Ehdr *ehdr,
+		       const char *path)
 {
-	if (assembler->meta) {
-		for (uint32_t i = 0; i < assembler->parser.sec_tbl.count; i++) {
-			if (assembler->meta[i].reltbl != NULL) {
-				free(assembler->meta[i].reltbl);
+	FILE *out = fopen(path, "w");
+
+	if (out == NULL) {
+		ERROR("cannot write '%s'", path);
+		return M_ERROR;
+	}
+
+	// ehdr
+	fwrite(ehdr, sizeof(Elf32_Ehdr), 1, out);
+
+	// phdr
+	fwrite(assembler->phdr, sizeof(Elf32_Phdr), assembler->phdr_len, out);
+
+	// reltbls
+	for (uint32_t i = 0; i < assembler->sectab.len; i++) {
+		struct section *sec = &assembler->sectab.sections[i];
+		if (sec->reltab.len == 0)
+			continue;
+		void *ptr = sec->reltab.data;
+		int len = sec->reltab.len;
+		fwrite(ptr, sizeof(Elf32_Rela), len, out);
+	}
+
+	// sections
+	for (uint32_t i = 0; i < assembler->sectab.len; i++) {
+		struct section *sec = &assembler->sectab.sections[i];
+		for (uint32_t j = 0; j < sec->len; j++) {
+			struct section_entry *entry = &sec->entries[j];
+			size_t size = entry->size;
+			fwrite(&entry->data, size, 1, out);
+			while(size % sec->alignment) {
+				uint8_t zero = 0;
+				fwrite(&zero, 1, 1, out);
+				size++;
 			}
 		}
-		free(assembler->meta);
 	}
 
+	// sym tbl
+	fwrite(assembler->symtab.symbols, sizeof(Elf32_Sym),
+		assembler->symtab.len, out);
+
+	// str tbl
+	fwrite(assembler->strtab.ptr, assembler->strtab.size, 1, out);
+
+	// shstr tbl
+	fwrite(assembler->shstrtab.ptr, assembler->shstrtab.size, 1, out);
+
+	// shdr
+	fwrite(assembler->shdr, sizeof(Elf32_Shdr), assembler->shdr_len, out);
+
+	fclose(out);
+
+	return M_SUCCESS;
+}
+
+static int assemble_elf(struct assembler *assembler, const char *out)
+{
+	if (assemble_phdr(assembler, (Elf32_Phdr **) &assembler->phdr,
+		   &assembler->phdr_len)) {
+		return M_ERROR;
+	}
+
+	if (assemble_shdr(assembler, (Elf32_Shdr **) &assembler->shdr,
+		   &assembler->shdr_len)) {
+		return M_ERROR;
+	};
+
+	Elf32_Ehdr ehdr = {
+		.e_ident = {
+			[EI_MAG0] = ELFMAG0,
+			[EI_MAG1] = ELFMAG1,
+			[EI_MAG2] = ELFMAG2,
+			[EI_MAG3] = ELFMAG3,
+			[EI_CLASS] = ELFCLASS32,
+			[EI_DATA] = ELFDATA2LSB,
+			[EI_VERSION] = EV_CURRENT,
+			[EI_OSABI] = ELFOSABI_NONE,
+			[EI_ABIVERSION] = 0x00,
+			[EI_PAD] = 0x00,
+		},
+		.e_type = ET_REL,
+		.e_machine = EM_MIPS,
+		.e_version = EV_CURRENT,
+		.e_entry = 0x00,
+		.e_phoff = 0x00,
+		.e_shoff = 0x00,
+		.e_flags = EF_MIPS_ARCH_32R6,
+		.e_ehsize = sizeof(Elf32_Ehdr),
+		.e_phentsize = sizeof(Elf32_Phdr),
+		.e_phnum = assembler->phdr_len,
+		.e_shentsize = sizeof(Elf32_Shdr),
+		.e_shnum = assembler->shdr_len,
+		.e_shstrndx = assembler->shstrtab_shidx,
+	};
+
+	update_offsets(assembler, &ehdr);
+	update_sym_shindx(assembler);
+
+	if (write_file(assembler, &ehdr, out))
+		return M_ERROR;
+
+	return M_SUCCESS;
+}
+
+int assemble_file(struct assembler_arguments args)
+{
+	struct assembler assembler;
+	int res = M_SUCCESS;
+
+	current_file = args.in_file;
+
+	if (assembler_init(&assembler, args.in_file))
+		return M_ERROR;
+
+	if (res == M_SUCCESS)
+		res = parse_file(&assembler);
+
+	if (res == M_SUCCESS)
+		res = assemble_elf(&assembler, args.out_file);
+
+	assembler_free(&assembler);
+
+	return res;
+}
+
+int assembler_init(struct assembler *assembler, const char *path)
+{
+	if (lexer_init(path, &assembler->lexer))
+		return M_ERROR;
+
+	if (parser_init(&assembler->lexer, &assembler->parser))
+		return M_ERROR;
+
+	if (strtab_init(&assembler->shstrtab))
+		return M_ERROR;
+
+	if (strtab_init(&assembler->strtab))
+		return M_ERROR;
+
+	if (symtab_init(&assembler->symtab))
+		return M_ERROR;
+
+	if (sectab_init(&assembler->sectab))
+		return M_ERROR;
+
+	assembler->symtab.strtab = &assembler->strtab;
+	assembler->phdr = NULL;
+	assembler->shdr = NULL;
+
+	return M_SUCCESS;
+}
+
+void assembler_free(struct assembler *assembler)
+{
 	if (assembler->phdr)
 		free(assembler->phdr);
 	if (assembler->shdr)
 		free(assembler->shdr);
-	if (assembler->symtab)
-		free(assembler->symtab);
 
-	symtbl_free(&assembler->sym_tbl);
-	strtbl_free(&assembler->str_tbl);
-	strtbl_free(&assembler->shstr_tbl);
+	sectab_free(&assembler->sectab);
+	symtab_free(&assembler->symtab);
+	strtab_free(&assembler->strtab);
+	strtab_free(&assembler->shstrtab);
 
 	parser_free(&assembler->parser);
 	lexer_free(&assembler->lexer);
 }
-
-int assemble_file(struct assembler_arguments args) {
-	switch (args.isa) {
-        case ISA_MIPS32:
-		return assemble_file_mips32(args);
-        }
-	return M_ERROR;
-}