bsd-user/elfload.c: Fix set-but-not-used warnings

Fix various warnings about set-but-not-used variables on OpenBSD:

bsd-user/elfload.c:1158:15: warning: variable 'mapped_addr' set but not used [-Wunused-but-set-variable]
bsd-user/elfload.c:1165:9: warning: variable 'status' set but not used [-Wunused-but-set-variable]
bsd-user/elfload.c:1168:15: warning: variable 'elf_stack' set but not used [-Wunused-but-set-variable]
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Reviewed-by: NPhilippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 1500395194-21455-3-git-send-email-peter.maydell@linaro.org

bsd-user/elfload.c

@@ -1155,21 +1155,20 @@ int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs,
     unsigned int interpreter_type = INTERPRETER_NONE;
     unsigned char ibcs2_interpreter;
     int i;
-    abi_ulong mapped_addr;
     struct elf_phdr * elf_ppnt;
     struct elf_phdr *elf_phdata;
     abi_ulong elf_bss, k, elf_brk;
     int retval;
     char * elf_interpreter;
     abi_ulong elf_entry, interp_load_addr = 0;
-    int status;
     abi_ulong start_code, end_code, start_data, end_data;
     abi_ulong reloc_func_desc = 0;
-    abi_ulong elf_stack;
+#ifdef LOW_ELF_STACK
+    abi_ulong elf_stack = ~((abi_ulong)0UL);
+#endif
     char passed_fileno[6];
 
     ibcs2_interpreter = 0;
-    status = 0;
     load_addr = 0;
     load_bias = 0;
     elf_ex = *((struct elfhdr *) bprm->buf);          /* exec-header */
@@ -1221,7 +1220,6 @@ int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs,
     elf_brk = 0;
 
 
-    elf_stack = ~((abi_ulong)0UL);
     elf_interpreter = NULL;
     start_code = ~((abi_ulong)0UL);
     end_code = 0;
@@ -1546,7 +1544,7 @@ int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs,
                and some applications "depend" upon this behavior.
                Since we do not have the power to recompile these, we
                emulate the SVr4 behavior.  Sigh.  */
-            mapped_addr = target_mmap(0, qemu_host_page_size, PROT_READ | PROT_EXEC,
+            target_mmap(0, qemu_host_page_size, PROT_READ | PROT_EXEC,
                                       MAP_FIXED | MAP_PRIVATE, -1, 0);
     }