Trivial ldd for mips

1 files changed, 164 insertions, 0 deletions

diff --git a/gnu/libexec/ld.so/ldd/ldd.c b/gnu/libexec/ld.so/ldd/ldd.c
new file mode 100644
index 00000000000..d26471c58fe
--- /dev/null
+++ b/gnu/libexec/ld.so/ldd/ldd.c
@@ -0,0 +1,164 @@
+/*	$OpenBSD: ldd.c,v 1.1 1996/10/04 21:27:05 pefo Exp $ */
+
+/*
+ * Copyright (c) 1996 Per Fogelstrom
+ * 
+ * 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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed under OpenBSD by
+ *	Per Fogelstrom.
+ * 4. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
+ *
+ */
+
+
+/* readsoname() adapted from Eric Youngdale's readelf program */
+
+
+#include <stdio.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+#include <elf_abi.h>
+
+int readsoneeded(FILE *);
+
+main(argc, argv)
+	int argc;
+	char **argv;
+{
+	FILE *f;
+
+	int lflag = 1;
+	int i, j;
+
+	if(argc < 2 || argc > 3) {
+		fprintf(stderr, "usage: %s [-l] file\n", argv[0]);
+		exit(1);
+	}
+
+	for(j = 1; j < argc; j ++) {
+		if(argv[j][0] == '-' && argv[j][1] == 'x')
+			lflag=0;
+		else
+			i = j;
+	}
+
+	f = fopen(argv[i], "r");
+	if(f == 0) {
+		fprintf(stderr, "%s: can't find '%s'.\n", argv[0], argv[i]);
+		exit(2);
+	}
+	if(!lflag)
+		readsoneeded(f);
+	fclose(f);
+
+	if(lflag) {
+		setenv("LD_TRACE_LOADED_OBJECTS", "1", 1);
+		execl(argv[i], NULL);
+	}
+	exit(0);
+}
+
+int readsoneeded(FILE *infile)
+{
+  Elf32_Ehdr *epnt;
+  Elf32_Phdr *ppnt;
+  int i;
+  char *header;
+  unsigned int dynamic_addr = 0;
+  unsigned int dynamic_size = 0;
+  int strtab_val = 0;
+  int soname_val = 0;
+  int loadaddr = -1;
+  int loadbase = 0;
+  Elf32_Dyn *dpnt;
+  struct stat st;
+  char *res = NULL;
+
+  if (fstat(fileno(infile), &st))
+    return -1L;
+  header = mmap(0, st.st_size, PROT_READ, MAP_SHARED, fileno(infile), 0);
+  if (header == (caddr_t)-1)
+    return -1;
+
+  epnt = (Elf32_Ehdr *)header;
+  if ((int)(epnt+1) > (int)(header + st.st_size))
+    goto skip;
+
+  ppnt = (Elf32_Phdr *)&header[epnt->e_phoff];
+  if ((int)ppnt < (int)header ||
+      (int)(ppnt+epnt->e_phnum) > (int)(header + st.st_size))
+    goto skip;
+
+  for(i = 0; i < epnt->e_phnum; i++)
+  {
+    if (loadaddr == -1 && ppnt->p_vaddr != 0) 
+      loadaddr = (ppnt->p_vaddr & 0xfffff000) -
+	(ppnt->p_offset & 0xfffff000);
+    if(ppnt->p_type == 2)
+    {
+      dynamic_addr = ppnt->p_offset;
+      dynamic_size = ppnt->p_filesz;
+    };
+    ppnt++;
+  };
+    
+  dpnt = (Elf32_Dyn *) &header[dynamic_addr];
+  dynamic_size = dynamic_size / sizeof(Elf32_Dyn);
+  if ((int)dpnt < (int)header ||
+      (int)(dpnt+dynamic_size) > (int)(header + st.st_size))
+    goto skip;
+  
+  while(dpnt->d_tag != DT_NULL)
+  {
+    if (dpnt->d_tag == DT_STRTAB)
+      strtab_val = dpnt->d_un.d_val;
+#define DT_MIPS_BASE_ADDRESS    0x70000006      /* XXX */
+    if (dpnt->d_tag == DT_MIPS_BASE_ADDRESS)
+      loadbase = dpnt->d_un.d_val;
+    dpnt++;
+  };
+
+  if (!strtab_val)
+    goto skip;
+
+  dpnt = (Elf32_Dyn *) &header[dynamic_addr];
+  while(dpnt->d_tag != DT_NULL)
+  {
+    if (dpnt->d_tag == DT_NEEDED) {
+      soname_val = dpnt->d_un.d_val;
+      if (soname_val != 0 && soname_val + strtab_val - loadbase >= 0 &&
+        soname_val + strtab_val - loadbase < st.st_size)
+        printf("%s\n", header - loadbase + soname_val + strtab_val);
+    }
+    dpnt++;
+  };
+
+ skip:
+  munmap(header, st.st_size);
+
+  return 0;
+}
+