Add a couple of toy programs.

CVS patchset: 5508
CVS date: 2002/06/18 17:52:02

libelf/lib/t1.c

@@ -0,0 +1,46 @@
+#include <fcntl.h>
+#include <stdio.h>
+#include <libelf.h>
+#include <stdlib.h>
+#include <string.h>
+
+static void
+failure(void)
+{
+    (void) fprintf(stderr, "%s\n", elf_errmsg(elf_errno()));
+     exit(1);
+}
+
+void
+main(int argc, char ** argv)
+{
+    Elf32_Shdr *    shdr;
+    Elf32_Ehdr *    ehdr;
+    Elf *        elf;
+    Elf_Scn *    scn;
+    Elf_Data *    data;
+    int        fd;
+    unsigned int    cnt;
+
+    /* Open the input file */
+    if ((fd = open(argv[1], O_RDONLY)) == -1)
+	exit(1);
+
+    /* Obtain the ELF descriptor */
+    (void) elf_version(EV_CURRENT);
+    if ((elf = elf_begin(fd, ELF_C_READ, NULL)) == NULL)
+	failure();
+
+    /* Obtain the .shstrtab data buffer */
+    if (((ehdr = elf32_getehdr(elf)) == NULL) ||
+	((scn = elf_getscn(elf, ehdr->e_shstrndx)) == NULL) ||
+	((data = elf_getdata(scn, NULL)) == NULL))
+             failure();
+
+    /* Traverse input filename, printing each section */
+    for (cnt = 1, scn = NULL; scn = elf_nextscn(elf, scn); cnt++) {
+	if ((shdr = elf32_getshdr(scn)) == NULL)
+	    failure();
+	(void) printf("[%d]    %s\n", cnt, (char *)data->d_buf + shdr->sh_name);
+    }
+} /* end main */

libelf/lib/t2.c

@@ -0,0 +1,42 @@
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <libelf.h>
+#include <gelf.h>
+
+int
+main(int argc, char **argv)
+{
+    Elf         *elf;
+    Elf_Scn     *scn = NULL;
+    GElf_Shdr   shdr;
+    Elf_Data    *data;
+    int         fd, ii, count;
+
+    elf_version(EV_CURRENT);
+
+    fd = open(argv[1], O_RDONLY);
+    elf = elf_begin(fd, ELF_C_READ, NULL);
+
+    while ((scn = elf_nextscn(elf, scn)) != NULL) {
+	gelf_getshdr(scn, &shdr);
+	if (shdr.sh_type == SHT_SYMTAB) {
+	    /* found a symbol table, go print it. */
+	    break;
+	}
+    }
+
+    data = elf_getdata(scn, NULL);
+    count = shdr.sh_size / shdr.sh_entsize;
+
+    /* print the symbol names */
+    for (ii = 0; ii < count; ++ii) {
+	GElf_Sym sym;
+	gelf_getsym(data, ii, &sym);
+	printf("%s\n", elf_strptr(elf, shdr.sh_link, sym.st_name));
+    }
+
+    elf_end(elf);
+    close(fd);
+}