ld.so load fix

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@47 c046a42c-6fe2-441c-8c8c-71466251a162

README

@@ -23,8 +23,12 @@ libraries installed on your PC. For example:
     ./qemu -L / /bin/ls
 
 * On non x86 CPUs, you need first to download at least an x86 glibc
-(qemu-i386-glibc21.tar.gz on the qemu web page). Then you can launch
-the precompiled 'ls' x86 executable:
+(qemu-i386-glibc21.tar.gz on the qemu web page). Ensure that
+LD_LIBRARY_PATH is not set:
+
+    unset LD_LIBRARY_PATH 
+
+Then you can launch the precompiled 'ls' x86 executable:
 
     ./qemu /usr/local/qemu-i386/bin/ls
 

linux-user/elfload.c

@@ -360,9 +360,6 @@ static unsigned int * create_elf_tables(char *p, int argc, int envc,
           put_user (tswapl(val), dlinfo++)
 
         if (exec) { /* Put this here for an ELF program interpreter */
-          struct elf_phdr * eppnt;
-          eppnt = (struct elf_phdr *)((unsigned long)exec->e_phoff);
-
           NEW_AUX_ENT (AT_PHDR, (unsigned int)(load_addr + exec->e_phoff));
           NEW_AUX_ENT (AT_PHENT, (unsigned int)(sizeof (struct elf_phdr)));
           NEW_AUX_ENT (AT_PHNUM, (unsigned int)(exec->e_phnum));
@@ -418,13 +415,17 @@ static unsigned long load_elf_interp(struct elfhdr * interp_elf_ex,
 	 */
 	load_addr = INTERP_LOADADDR;
 
+#ifdef BSWAP_NEEDED
+        bswap_ehdr(interp_elf_ex);
+#endif
 	/* First of all, some simple consistency checks */
 	if ((interp_elf_ex->e_type != ET_EXEC && 
 	    interp_elf_ex->e_type != ET_DYN) || 
 	   !elf_check_arch(interp_elf_ex->e_machine)) {
 		return ~0UL;
 	}
 
+
 	/* Now read in all of the header information */
 
 	if (sizeof(struct elf_phdr) * interp_elf_ex->e_phnum > X86_PAGE_SIZE)
@@ -452,7 +453,6 @@ static unsigned long load_elf_interp(struct elfhdr * interp_elf_ex,
 			   (char *) elf_phdata,
 			   sizeof(struct elf_phdr) * interp_elf_ex->e_phnum);
 	}
-
 	if (retval < 0) {
 		perror("load_elf_interp");
 		exit(-1);

qemu-doc.texi

@@ -92,8 +92,15 @@ qemu -L / /bin/ls
 
 
 @item On non x86 CPUs, you need first to download at least an x86 glibc
-(@file{qemu-i386-glibc21.tar.gz} on the QEMU web page). Then you can
-launch the precompiled @file{ls} x86 executable:
+(@file{qemu-i386-glibc21.tar.gz} on the QEMU web page). Ensure that
+@code{LD_LIBRARY_PATH} is not set:
+
+@example
+unset LD_LIBRARY_PATH 
+@end example
+
+Then you can launch the precompiled @file{ls} x86 executable:
+
 @example
 qemu /usr/local/qemu-i386/bin/ls
 @end example