* JAN/99 -- coded full program relocation (gerg@snapgear.com)
*/
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/init.h>
#include <linux/flat.h>
#include <linux/uaccess.h>
+#include <linux/vmalloc.h>
#include <asm/byteorder.h>
#include <asm/unaligned.h>
/****************************************************************************/
-#if 0
-#define DEBUG 1
-#endif
-
-#ifdef DEBUG
-#define DBG_FLT(a...) printk(a)
-#else
-#define DBG_FLT(a...)
-#endif
-
/*
* User data (data section and bss) needs to be aligned.
* We pick 0x20 here because it is the max value elf2flt has always
static int flat_core_dump(struct coredump_params *cprm)
{
- printk("Process %s:%d received signr %d and should have core dumped\n",
- current->comm, current->pid, cprm->siginfo->si_signo);
+ pr_warn("Process %s:%d received signr %d and should have core dumped\n",
+ current->comm, current->pid, cprm->siginfo->si_signo);
return 1;
}
/*
* create_flat_tables() parses the env- and arg-strings in new user
* memory and creates the pointer tables from them, and puts their
- * addresses on the "stack", returning the new stack pointer value.
+ * addresses on the "stack", recording the new stack pointer value.
*/
-static unsigned long create_flat_tables(
- unsigned long pp,
- struct linux_binprm *bprm)
+static int create_flat_tables(struct linux_binprm *bprm, unsigned long arg_start)
{
- unsigned long *argv, *envp;
- unsigned long *sp;
- char *p = (char *)pp;
- int argc = bprm->argc;
- int envc = bprm->envc;
- char uninitialized_var(dummy);
-
- sp = (unsigned long *)p;
- sp -= (envc + argc + 2) + 1 + (flat_argvp_envp_on_stack() ? 2 : 0);
- sp = (unsigned long *) ((unsigned long)sp & -FLAT_STACK_ALIGN);
- argv = sp + 1 + (flat_argvp_envp_on_stack() ? 2 : 0);
- envp = argv + (argc + 1);
+ char __user *p;
+ unsigned long __user *sp;
+ long i, len;
+ p = (char __user *)arg_start;
+ sp = (unsigned long __user *)current->mm->start_stack;
+
+ sp -= bprm->envc + 1;
+ sp -= bprm->argc + 1;
+ sp -= flat_argvp_envp_on_stack() ? 2 : 0;
+ sp -= 1; /* &argc */
+
+ current->mm->start_stack = (unsigned long)sp & -FLAT_STACK_ALIGN;
+ sp = (unsigned long __user *)current->mm->start_stack;
+
+ __put_user(bprm->argc, sp++);
if (flat_argvp_envp_on_stack()) {
- put_user((unsigned long) envp, sp + 2);
- put_user((unsigned long) argv, sp + 1);
- }
-
- put_user(argc, sp);
- current->mm->arg_start = (unsigned long) p;
- while (argc-- > 0) {
- put_user((unsigned long) p, argv++);
- do {
- get_user(dummy, p); p++;
- } while (dummy);
- }
- put_user((unsigned long) NULL, argv);
- current->mm->arg_end = current->mm->env_start = (unsigned long) p;
- while (envc-- > 0) {
- put_user((unsigned long)p, envp); envp++;
- do {
- get_user(dummy, p); p++;
- } while (dummy);
- }
- put_user((unsigned long) NULL, envp);
- current->mm->env_end = (unsigned long) p;
- return (unsigned long)sp;
+ unsigned long argv, envp;
+ argv = (unsigned long)(sp + 2);
+ envp = (unsigned long)(sp + 2 + bprm->argc + 1);
+ __put_user(argv, sp++);
+ __put_user(envp, sp++);
+ }
+
+ current->mm->arg_start = (unsigned long)p;
+ for (i = bprm->argc; i > 0; i--) {
+ __put_user((unsigned long)p, sp++);
+ len = strnlen_user(p, MAX_ARG_STRLEN);
+ if (!len || len > MAX_ARG_STRLEN)
+ return -EINVAL;
+ p += len;
+ }
+ __put_user(0, sp++);
+ current->mm->arg_end = (unsigned long)p;
+
+ current->mm->env_start = (unsigned long) p;
+ for (i = bprm->envc; i > 0; i--) {
+ __put_user((unsigned long)p, sp++);
+ len = strnlen_user(p, MAX_ARG_STRLEN);
+ if (!len || len > MAX_ARG_STRLEN)
+ return -EINVAL;
+ p += len;
+ }
+ __put_user(0, sp++);
+ current->mm->env_end = (unsigned long)p;
+
+ return 0;
}
/****************************************************************************/
loff_t fpos;
int ret, retval;
- DBG_FLT("decompress_exec(offset=%lx,buf=%p,len=%lx)\n", offset, dst, len);
+ pr_debug("decompress_exec(offset=%lx,buf=%p,len=%lx)\n", offset, dst, len);
memset(&strm, 0, sizeof(strm));
strm.workspace = kmalloc(zlib_inflate_workspacesize(), GFP_KERNEL);
if (strm.workspace == NULL) {
- DBG_FLT("binfmt_flat: no memory for decompress workspace\n");
+ pr_debug("no memory for decompress workspace\n");
return -ENOMEM;
}
buf = kmalloc(LBUFSIZE, GFP_KERNEL);
if (buf == NULL) {
- DBG_FLT("binfmt_flat: no memory for read buffer\n");
+ pr_debug("no memory for read buffer\n");
retval = -ENOMEM;
goto out_free;
}
/* Check minimum size -- gzip header */
if (ret < 10) {
- DBG_FLT("binfmt_flat: file too small?\n");
+ pr_debug("file too small?\n");
goto out_free_buf;
}
/* Check gzip magic number */
if ((buf[0] != 037) || ((buf[1] != 0213) && (buf[1] != 0236))) {
- DBG_FLT("binfmt_flat: unknown compression magic?\n");
+ pr_debug("unknown compression magic?\n");
goto out_free_buf;
}
/* Check gzip method */
if (buf[2] != 8) {
- DBG_FLT("binfmt_flat: unknown compression method?\n");
+ pr_debug("unknown compression method?\n");
goto out_free_buf;
}
/* Check gzip flags */
if ((buf[3] & ENCRYPTED) || (buf[3] & CONTINUATION) ||
(buf[3] & RESERVED)) {
- DBG_FLT("binfmt_flat: unknown flags?\n");
+ pr_debug("unknown flags?\n");
goto out_free_buf;
}
if (buf[3] & EXTRA_FIELD) {
ret += 2 + buf[10] + (buf[11] << 8);
if (unlikely(ret >= LBUFSIZE)) {
- DBG_FLT("binfmt_flat: buffer overflow (EXTRA)?\n");
+ pr_debug("buffer overflow (EXTRA)?\n");
goto out_free_buf;
}
}
while (ret < LBUFSIZE && buf[ret++] != 0)
;
if (unlikely(ret == LBUFSIZE)) {
- DBG_FLT("binfmt_flat: buffer overflow (ORIG_NAME)?\n");
+ pr_debug("buffer overflow (ORIG_NAME)?\n");
goto out_free_buf;
}
}
while (ret < LBUFSIZE && buf[ret++] != 0)
;
if (unlikely(ret == LBUFSIZE)) {
- DBG_FLT("binfmt_flat: buffer overflow (COMMENT)?\n");
+ pr_debug("buffer overflow (COMMENT)?\n");
goto out_free_buf;
}
}
strm.total_out = 0;
if (zlib_inflateInit2(&strm, -MAX_WBITS) != Z_OK) {
- DBG_FLT("binfmt_flat: zlib init failed?\n");
+ pr_debug("zlib init failed?\n");
goto out_free_buf;
}
}
if (ret < 0) {
- DBG_FLT("binfmt_flat: decompression failed (%d), %s\n",
+ pr_debug("decompression failed (%d), %s\n",
ret, strm.msg);
goto out_zlib;
}
r &= 0x00ffffff; /* Trim ID off here */
}
if (id >= MAX_SHARED_LIBS) {
- printk("BINFMT_FLAT: reference 0x%lx to shared library %d",
- r, id);
+ pr_err("reference 0x%lx to shared library %d", r, id);
goto failed;
}
if (curid != id) {
if (internalp) {
- printk("BINFMT_FLAT: reloc address 0x%lx not in same module "
- "(%d != %d)", r, curid, id);
+ pr_err("reloc address 0x%lx not in same module "
+ "(%d != %d)", r, curid, id);
goto failed;
} else if (!p->lib_list[id].loaded &&
load_flat_shared_library(id, p) < 0) {
- printk("BINFMT_FLAT: failed to load library %d", id);
+ pr_err("failed to load library %d", id);
goto failed;
}
/* Check versioning information (i.e. time stamps) */
if (p->lib_list[id].build_date && p->lib_list[curid].build_date &&
p->lib_list[curid].build_date < p->lib_list[id].build_date) {
- printk("BINFMT_FLAT: library %d is younger than %d", id, curid);
+ pr_err("library %d is younger than %d", id, curid);
goto failed;
}
}
text_len = p->lib_list[id].text_len;
if (!flat_reloc_valid(r, start_brk - start_data + text_len)) {
- printk("BINFMT_FLAT: reloc outside program 0x%lx (0 - 0x%lx/0x%lx)",
+ pr_err("reloc outside program 0x%lx (0 - 0x%lx/0x%lx)",
r, start_brk-start_data+text_len, text_len);
goto failed;
}
return addr;
failed:
- printk(", killing %s!\n", current->comm);
+ pr_cont(", killing %s!\n", current->comm);
send_sig(SIGSEGV, current, 0);
return RELOC_FAILED;
static void old_reloc(unsigned long rl)
{
-#ifdef DEBUG
static const char *segment[] = { "TEXT", "DATA", "BSS", "*UNKNOWN*" };
-#endif
flat_v2_reloc_t r;
- unsigned long *ptr;
+ unsigned long __user *ptr;
+ unsigned long val;
r.value = rl;
#if defined(CONFIG_COLDFIRE)
- ptr = (unsigned long *) (current->mm->start_code + r.reloc.offset);
+ ptr = (unsigned long __user *)(current->mm->start_code + r.reloc.offset);
#else
- ptr = (unsigned long *) (current->mm->start_data + r.reloc.offset);
+ ptr = (unsigned long __user *)(current->mm->start_data + r.reloc.offset);
#endif
+ get_user(val, ptr);
-#ifdef DEBUG
- printk("Relocation of variable at DATASEG+%x "
- "(address %p, currently %lx) into segment %s\n",
- r.reloc.offset, ptr, *ptr, segment[r.reloc.type]);
-#endif
+ pr_debug("Relocation of variable at DATASEG+%x "
+ "(address %p, currently %lx) into segment %s\n",
+ r.reloc.offset, ptr, val, segment[r.reloc.type]);
switch (r.reloc.type) {
case OLD_FLAT_RELOC_TYPE_TEXT:
- *ptr += current->mm->start_code;
+ val += current->mm->start_code;
break;
case OLD_FLAT_RELOC_TYPE_DATA:
- *ptr += current->mm->start_data;
+ val += current->mm->start_data;
break;
case OLD_FLAT_RELOC_TYPE_BSS:
- *ptr += current->mm->end_data;
+ val += current->mm->end_data;
break;
default:
- printk("BINFMT_FLAT: Unknown relocation type=%x\n", r.reloc.type);
+ pr_err("Unknown relocation type=%x\n", r.reloc.type);
break;
}
+ put_user(val, ptr);
-#ifdef DEBUG
- printk("Relocation became %lx\n", *ptr);
-#endif
+ pr_debug("Relocation became %lx\n", val);
}
/****************************************************************************/
unsigned long textpos, datapos, realdatastart;
unsigned long text_len, data_len, bss_len, stack_len, full_data, flags;
unsigned long len, memp, memp_size, extra, rlim;
- unsigned long *reloc, *rp;
+ unsigned long __user *reloc, *rp;
struct inode *inode;
int i, rev, relocs;
loff_t fpos;
}
if (flags & FLAT_FLAG_KTRACE)
- printk("BINFMT_FLAT: Loading file: %s\n", bprm->filename);
+ pr_info("Loading file: %s\n", bprm->filename);
if (rev != FLAT_VERSION && rev != OLD_FLAT_VERSION) {
- printk("BINFMT_FLAT: bad flat file version 0x%x (supported "
- "0x%lx and 0x%lx)\n",
- rev, FLAT_VERSION, OLD_FLAT_VERSION);
+ pr_err("bad flat file version 0x%x (supported 0x%lx and 0x%lx)\n",
+ rev, FLAT_VERSION, OLD_FLAT_VERSION);
ret = -ENOEXEC;
goto err;
}
/* Don't allow old format executables to use shared libraries */
if (rev == OLD_FLAT_VERSION && id != 0) {
- printk("BINFMT_FLAT: shared libraries are not available before rev 0x%lx\n",
- FLAT_VERSION);
+ pr_err("shared libraries are not available before rev 0x%lx\n",
+ FLAT_VERSION);
+ ret = -ENOEXEC;
+ goto err;
+ }
+
+ /*
+ * Make sure the header params are sane.
+ * 28 bits (256 MB) is way more than reasonable in this case.
+ * If some top bits are set we have probable binary corruption.
+ */
+ if ((text_len | data_len | bss_len | stack_len | full_data) >> 28) {
+ pr_err("bad header\n");
ret = -ENOEXEC;
goto err;
}
#ifndef CONFIG_BINFMT_ZFLAT
if (flags & (FLAT_FLAG_GZIP|FLAT_FLAG_GZDATA)) {
- printk("Support for ZFLAT executables is not enabled.\n");
+ pr_err("Support for ZFLAT executables is not enabled.\n");
ret = -ENOEXEC;
goto err;
}
* case, and then the fully copied to RAM case which lumps
* it all together.
*/
- if ((flags & (FLAT_FLAG_RAM|FLAT_FLAG_GZIP)) == 0) {
+ if (!IS_ENABLED(CONFIG_MMU) && !(flags & (FLAT_FLAG_RAM|FLAT_FLAG_GZIP))) {
/*
* this should give us a ROM ptr, but if it doesn't we don't
* really care
*/
- DBG_FLT("BINFMT_FLAT: ROM mapping of file (we hope)\n");
+ pr_debug("ROM mapping of file (we hope)\n");
textpos = vm_mmap(bprm->file, 0, text_len, PROT_READ|PROT_EXEC,
MAP_PRIVATE|MAP_EXECUTABLE, 0);
ret = textpos;
if (!textpos)
ret = -ENOMEM;
- printk("Unable to mmap process text, errno %d\n", ret);
+ pr_err("Unable to mmap process text, errno %d\n", ret);
goto err;
}
ret = realdatastart;
if (!realdatastart)
ret = -ENOMEM;
- printk("Unable to allocate RAM for process data, "
+ pr_err("Unable to allocate RAM for process data, "
"errno %d\n", ret);
vm_munmap(textpos, text_len);
goto err;
MAX_SHARED_LIBS * sizeof(unsigned long),
FLAT_DATA_ALIGN);
- DBG_FLT("BINFMT_FLAT: Allocated data+bss+stack (%ld bytes): %lx\n",
- data_len + bss_len + stack_len, datapos);
+ pr_debug("Allocated data+bss+stack (%ld bytes): %lx\n",
+ data_len + bss_len + stack_len, datapos);
fpos = ntohl(hdr->data_start);
#ifdef CONFIG_BINFMT_ZFLAT
}
if (IS_ERR_VALUE(result)) {
ret = result;
- printk("Unable to read data+bss, errno %d\n", ret);
+ pr_err("Unable to read data+bss, errno %d\n", ret);
vm_munmap(textpos, text_len);
vm_munmap(realdatastart, len);
goto err;
}
- reloc = (unsigned long *)
+ reloc = (unsigned long __user *)
(datapos + (ntohl(hdr->reloc_start) - text_len));
memp = realdatastart;
memp_size = len;
ret = textpos;
if (!textpos)
ret = -ENOMEM;
- printk("Unable to allocate RAM for process text/data, "
+ pr_err("Unable to allocate RAM for process text/data, "
"errno %d\n", ret);
goto err;
}
MAX_SHARED_LIBS * sizeof(unsigned long),
FLAT_DATA_ALIGN);
- reloc = (unsigned long *)
+ reloc = (unsigned long __user *)
(datapos + (ntohl(hdr->reloc_start) - text_len));
memp = textpos;
memp_size = len;
* load it all in and treat it like a RAM load from now on
*/
if (flags & FLAT_FLAG_GZIP) {
+#ifndef CONFIG_MMU
result = decompress_exec(bprm, sizeof(struct flat_hdr),
(((char *)textpos) + sizeof(struct flat_hdr)),
(text_len + full_data
0);
memmove((void *) datapos, (void *) realdatastart,
full_data);
+#else
+ /*
+ * This is used on MMU systems mainly for testing.
+ * Let's use a kernel buffer to simplify things.
+ */
+ long unz_text_len = text_len - sizeof(struct flat_hdr);
+ long unz_len = unz_text_len + full_data;
+ char *unz_data = vmalloc(unz_len);
+ if (!unz_data) {
+ result = -ENOMEM;
+ } else {
+ result = decompress_exec(bprm, sizeof(struct flat_hdr),
+ unz_data, unz_len, 0);
+ if (result == 0 &&
+ (copy_to_user((void __user *)textpos + sizeof(struct flat_hdr),
+ unz_data, unz_text_len) ||
+ copy_to_user((void __user *)datapos,
+ unz_data + unz_text_len, full_data)))
+ result = -EFAULT;
+ vfree(unz_data);
+ }
+#endif
} else if (flags & FLAT_FLAG_GZDATA) {
result = read_code(bprm->file, textpos, 0, text_len);
- if (!IS_ERR_VALUE(result))
+ if (!IS_ERR_VALUE(result)) {
+#ifndef CONFIG_MMU
result = decompress_exec(bprm, text_len, (char *) datapos,
full_data, 0);
- } else
+#else
+ char *unz_data = vmalloc(full_data);
+ if (!unz_data) {
+ result = -ENOMEM;
+ } else {
+ result = decompress_exec(bprm, text_len,
+ unz_data, full_data, 0);
+ if (result == 0 &&
+ copy_to_user((void __user *)datapos,
+ unz_data, full_data))
+ result = -EFAULT;
+ vfree(unz_data);
+ }
#endif
+ }
+ } else
+#endif /* CONFIG_BINFMT_ZFLAT */
{
result = read_code(bprm->file, textpos, 0, text_len);
if (!IS_ERR_VALUE(result))
}
if (IS_ERR_VALUE(result)) {
ret = result;
- printk("Unable to read code+data+bss, errno %d\n", ret);
+ pr_err("Unable to read code+data+bss, errno %d\n", ret);
vm_munmap(textpos, text_len + data_len + extra +
MAX_SHARED_LIBS * sizeof(unsigned long));
goto err;
*/
current->mm->start_brk = datapos + data_len + bss_len;
current->mm->brk = (current->mm->start_brk + 3) & ~3;
+#ifndef CONFIG_MMU
current->mm->context.end_brk = memp + memp_size - stack_len;
+#endif
}
if (flags & FLAT_FLAG_KTRACE) {
- printk("Mapping is %lx, Entry point is %x, data_start is %x\n",
- textpos, 0x00ffffff&ntohl(hdr->entry), ntohl(hdr->data_start));
- printk("%s %s: TEXT=%lx-%lx DATA=%lx-%lx BSS=%lx-%lx\n",
- id ? "Lib" : "Load", bprm->filename,
- start_code, end_code, datapos, datapos + data_len,
- datapos + data_len, (datapos + data_len + bss_len + 3) & ~3);
+ pr_info("Mapping is %lx, Entry point is %x, data_start is %x\n",
+ textpos, 0x00ffffff&ntohl(hdr->entry), ntohl(hdr->data_start));
+ pr_info("%s %s: TEXT=%lx-%lx DATA=%lx-%lx BSS=%lx-%lx\n",
+ id ? "Lib" : "Load", bprm->filename,
+ start_code, end_code, datapos, datapos + data_len,
+ datapos + data_len, (datapos + data_len + bss_len + 3) & ~3);
}
/* Store the current module values into the global library structure */
* image.
*/
if (flags & FLAT_FLAG_GOTPIC) {
- for (rp = (unsigned long *)datapos; *rp != 0xffffffff; rp++) {
- unsigned long addr;
- if (*rp) {
- addr = calc_reloc(*rp, libinfo, id, 0);
+ for (rp = (unsigned long __user *)datapos; ; rp++) {
+ unsigned long addr, rp_val;
+ if (get_user(rp_val, rp))
+ return -EFAULT;
+ if (rp_val == 0xffffffff)
+ break;
+ if (rp_val) {
+ addr = calc_reloc(rp_val, libinfo, id, 0);
if (addr == RELOC_FAILED) {
ret = -ENOEXEC;
goto err;
}
- *rp = addr;
+ if (put_user(addr, rp))
+ return -EFAULT;
}
}
}
* __start to address 4 so that is okay).
*/
if (rev > OLD_FLAT_VERSION) {
- unsigned long persistent = 0;
+ unsigned long __maybe_unused persistent = 0;
for (i = 0; i < relocs; i++) {
unsigned long addr, relval;
* relocated (of course, the address has to be
* relocated first).
*/
- relval = ntohl(reloc[i]);
+ if (get_user(relval, reloc + i))
+ return -EFAULT;
+ relval = ntohl(relval);
if (flat_set_persistent(relval, &persistent))
continue;
addr = flat_get_relocate_addr(relval);
- rp = (unsigned long *) calc_reloc(addr, libinfo, id, 1);
- if (rp == (unsigned long *)RELOC_FAILED) {
+ rp = (unsigned long __user *)calc_reloc(addr, libinfo, id, 1);
+ if (rp == (unsigned long __user *)RELOC_FAILED) {
ret = -ENOEXEC;
goto err;
}
}
}
} else {
- for (i = 0; i < relocs; i++)
- old_reloc(ntohl(reloc[i]));
+ for (i = 0; i < relocs; i++) {
+ unsigned long relval;
+ if (get_user(relval, reloc + i))
+ return -EFAULT;
+ relval = ntohl(relval);
+ old_reloc(relval);
+ }
}
flush_icache_range(start_code, end_code);
/* zero the BSS, BRK and stack areas */
- memset((void *)(datapos + data_len), 0, bss_len +
- (memp + memp_size - stack_len - /* end brk */
- libinfo->lib_list[id].start_brk) + /* start brk */
- stack_len);
+ if (clear_user((void __user *)(datapos + data_len), bss_len +
+ (memp + memp_size - stack_len - /* end brk */
+ libinfo->lib_list[id].start_brk) + /* start brk */
+ stack_len))
+ return -EFAULT;
return 0;
err:
{
struct lib_info libinfo;
struct pt_regs *regs = current_pt_regs();
- unsigned long p = bprm->p;
- unsigned long stack_len;
+ unsigned long stack_len = 0;
unsigned long start_addr;
- unsigned long *sp;
int res;
int i, j;
* pedantic and include space for the argv/envp array as it may have
* a lot of entries.
*/
-#define TOP_OF_ARGS (PAGE_SIZE * MAX_ARG_PAGES - sizeof(void *))
- stack_len = TOP_OF_ARGS - bprm->p; /* the strings */
- stack_len += (bprm->argc + 1) * sizeof(char *); /* the argv array */
- stack_len += (bprm->envc + 1) * sizeof(char *); /* the envp array */
- stack_len += FLAT_STACK_ALIGN - 1; /* reserve for upcoming alignment */
+#ifndef CONFIG_MMU
+ stack_len += PAGE_SIZE * MAX_ARG_PAGES - bprm->p; /* the strings */
+#endif
+ stack_len += (bprm->argc + 1) * sizeof(char *); /* the argv array */
+ stack_len += (bprm->envc + 1) * sizeof(char *); /* the envp array */
+ stack_len = ALIGN(stack_len, FLAT_STACK_ALIGN);
res = load_flat_file(bprm, &libinfo, 0, &stack_len);
if (res < 0)
return res;
/* Update data segment pointers for all libraries */
- for (i = 0; i < MAX_SHARED_LIBS; i++)
- if (libinfo.lib_list[i].loaded)
- for (j = 0; j < MAX_SHARED_LIBS; j++)
- (-(j+1))[(unsigned long *)(libinfo.lib_list[i].start_data)] =
- (libinfo.lib_list[j].loaded) ?
- libinfo.lib_list[j].start_data : UNLOADED_LIB;
+ for (i = 0; i < MAX_SHARED_LIBS; i++) {
+ if (!libinfo.lib_list[i].loaded)
+ continue;
+ for (j = 0; j < MAX_SHARED_LIBS; j++) {
+ unsigned long val = libinfo.lib_list[j].loaded ?
+ libinfo.lib_list[j].start_data : UNLOADED_LIB;
+ unsigned long __user *p = (unsigned long __user *)
+ libinfo.lib_list[i].start_data;
+ p -= j + 1;
+ if (put_user(val, p))
+ return -EFAULT;
+ }
+ }
install_exec_creds(bprm);
set_binfmt(&flat_format);
- p = ((current->mm->context.end_brk + stack_len + 3) & ~3) - 4;
- DBG_FLT("p=%lx\n", p);
-
- /* copy the arg pages onto the stack, this could be more efficient :-) */
- for (i = TOP_OF_ARGS - 1; i >= bprm->p; i--)
- *(char *) --p =
- ((char *) page_address(bprm->page[i/PAGE_SIZE]))[i % PAGE_SIZE];
+#ifdef CONFIG_MMU
+ res = setup_arg_pages(bprm, STACK_TOP, EXSTACK_DEFAULT);
+ if (!res)
+ res = create_flat_tables(bprm, bprm->p);
+#else
+ /* Stash our initial stack pointer into the mm structure */
+ current->mm->start_stack =
+ ((current->mm->context.end_brk + stack_len + 3) & ~3) - 4;
+ pr_debug("sp=%lx\n", current->mm->start_stack);
- sp = (unsigned long *) create_flat_tables(p, bprm);
+ /* copy the arg pages onto the stack */
+ res = transfer_args_to_stack(bprm, ¤t->mm->start_stack);
+ if (!res)
+ res = create_flat_tables(bprm, current->mm->start_stack);
+#endif
+ if (res)
+ return res;
/* Fake some return addresses to ensure the call chain will
* initialise library in order for us. We are required to call
for (i = MAX_SHARED_LIBS-1; i > 0; i--) {
if (libinfo.lib_list[i].loaded) {
/* Push previos first to call address */
- --sp; put_user(start_addr, sp);
+ unsigned long __user *sp;
+ current->mm->start_stack -= sizeof(unsigned long);
+ sp = (unsigned long __user *)current->mm->start_stack;
+ __put_user(start_addr, sp);
start_addr = libinfo.lib_list[i].entry;
}
}
#endif
- /* Stash our initial stack pointer into the mm structure */
- current->mm->start_stack = (unsigned long)sp;
-
#ifdef FLAT_PLAT_INIT
FLAT_PLAT_INIT(regs);
#endif
- DBG_FLT("start_thread(regs=0x%p, entry=0x%lx, start_stack=0x%lx)\n",
- regs, start_addr, current->mm->start_stack);
+ pr_debug("start_thread(regs=0x%p, entry=0x%lx, start_stack=0x%lx)\n",
+ regs, start_addr, current->mm->start_stack);
start_thread(regs, start_addr, current->mm->start_stack);
return 0;
projects / cascardo / linux.git / blobdiff