Fix #19964 - show relro:no even if no dyn section is found ##bin

doc/fortunes.fun

@@ -326,3 +326,4 @@ Are you still watching?
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libr/bin/format/elf/elf.c

@@ -517,23 +517,6 @@ static Elf_(Phdr) *get_dynamic_segment(ELFOBJ *eo) {
 	return NULL;
 }
 
-static void init_dynamic_section_sdb(ELFOBJ *eo, Elf_(Addr) strtabaddr, size_t strsize) {
-	int r = Elf_(has_relro) (eo);
-	switch (r) {
-	case R_ELF_FULL_RELRO:
-		sdb_set (eo->kv, "elf.relro", "full", 0);
-		break;
-	case R_ELF_PART_RELRO:
-		sdb_set (eo->kv, "elf.relro", "partial", 0);
-		break;
-	default:
-		sdb_set (eo->kv, "elf.relro", "no", 0);
-		break;
-	}
-	sdb_num_set (eo->kv, "elf_strtab.offset", strtabaddr, 0);
-	sdb_num_set (eo->kv, "elf_strtab.size", strsize, 0);
-}
-
 static void set_default_value_dynamic_info(ELFOBJ *eo) {
 	eo->dyn_info.dt_pltrelsz = 0;
 	eo->dyn_info.dt_pltgot = R_BIN_ELF_ADDR_MAX;
@@ -724,23 +707,27 @@ static int init_dynamic_section(ELFOBJ *eo) {
 		if (!strtabaddr) {
 			R_LOG_DEBUG ("DT_STRTAB not found or invalid");
 		}
+		eprintf ("err\n");
 		return false;
 	}
 
 	char *strtab = calloc (1, strsize + 1);
 	if (!strtab) {
+		eprintf ("some\n");
 		return false;
 	}
 
 	int r = r_buf_read_at (eo->b, strtabaddr, (ut8 *)strtab, strsize);
 	if (r != strsize) {
 		free (strtab);
+		eprintf ("early\n");
 		return false;
 	}
 
 	eo->strtab = strtab;
 	eo->strtab_size = strsize;
-	init_dynamic_section_sdb (eo, strtabaddr, strsize);
+	sdb_num_set (eo->kv, "elf_strtab.offset", strtabaddr, 0);
+	sdb_num_set (eo->kv, "elf_strtab.size", strsize, 0);
 	return true;
 }
 
@@ -1534,6 +1521,21 @@ static bool init_dynstr(ELFOBJ *eo) {
 
 static const RVector *_load_elf_sections(ELFOBJ *eo);
 
+static void relro_insdb(ELFOBJ *eo) {
+	int r = Elf_(has_relro) (eo);
+	switch (r) {
+	case R_ELF_FULL_RELRO:
+		sdb_set (eo->kv, "elf.relro", "full", 0);
+		break;
+	case R_ELF_PART_RELRO:
+		sdb_set (eo->kv, "elf.relro", "partial", 0);
+		break;
+	default:
+		sdb_set (eo->kv, "elf.relro", "no", 0);
+		break;
+	}
+}
+
 static bool elf_init(ELFOBJ *eo) {
 	// eo is not an ELF
 	if (!init_ehdr (eo)) {
@@ -1557,6 +1559,7 @@ static bool elf_init(ELFOBJ *eo) {
 			R_LOG_DEBUG ("Cannot initialize dynamic section");
 		}
 	}
+	relro_insdb (eo);
 
 	eo->imports_by_ord_size = 0;
 	eo->imports_by_ord = NULL;

libr/core/cbin.c

@@ -1035,9 +1035,11 @@ static int bin_info(RCore *r, PJ *pj, int mode, ut64 laddr) {
 		pair_bool (pj, "pic", info->has_pi);
 		pair_bool (pj, "relocs", R_BIN_DBG_RELOCS & info->dbg_info);
 		Sdb *sdb_info = sdb_ns (obj->kv, "info", false);
-		tmp_buf = sdb_get (sdb_info, "elf.relro", 0);
-		if (tmp_buf) {
-			pair_str (pj, "relro", tmp_buf);
+		if (sdb_info) {
+			tmp_buf = sdb_get (sdb_info, "elf.relro", 0);
+			if (R_STR_ISNOTEMPTY (tmp_buf)) {
+				pair_str (pj, "relro", tmp_buf);
+			}
 			free (tmp_buf);
 		}
 		pair_str (pj, "rpath", info->rpath);

libr/core/cmd_meta.c

@@ -98,10 +98,8 @@ static RCoreHelpMessage help_msg_CS = {
 };
 
 static RCoreHelpMessage help_msg_Cs = {
-	"Usage:", "Cs[ga-*.] [size] [@addr]", "",
-	"NOTE:", " size", "1 unit in bytes == width in bytes of smallest possible char in encoding,",
-	"", "", "  so ascii/latin1/utf8 = 1, utf16le = 2",
-	" Cz", " [size] [@addr]", "ditto",
+	"Usage:", "Cs[ga-*.] ([size]) [@addr]", "",
+	"Cz", " [size] [@addr]", "ditto",
 	"Cs", " [size] @addr", "add string (guess latin1/utf16le)",
 	"Cs", "", "list all strings in human friendly form",
 	"Cs*", "", "list all strings in r2 commands",

test/db/formats/elf/relro

@@ -0,0 +1,23 @@
+NAME=relro partial
+FILE=bins/elf/relro/true32
+CMDS=ij~{bin.relro}
+EXPECT=<<EOF
+partial
+EOF
+RUN
+
+NAME=relro no
+FILE=bins/elf/relro/top
+CMDS=ij~{bin.relro}
+EXPECT=<<EOF
+no
+EOF
+RUN
+
+NAME=relro full
+FILE=bins/elf/relro/netifd
+CMDS=ij~{bin.relro}
+EXPECT=<<EOF
+full
+EOF
+RUN

test/db/formats/elf/riscv

@@ -462,6 +462,7 @@ nx       false
 os       linux
 pic      false
 relocs   true
+relro    no
 rpath    NONE
 sanitize false
 static   true

test/db/formats/elf/v850

@@ -45,6 +45,7 @@ nx       false
 os       linux
 pic      false
 relocs   true
+relro    no
 rpath    NONE
 sanitize false
 static   true