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authorDavid Howells <dhowells@redhat.com>2006-07-10 11:44:53 (GMT)
committerLinus Torvalds <torvalds@g5.osdl.org>2006-07-10 20:24:21 (GMT)
commit8a2ab7f5df76b920d62b908919d987d3b8a82856 (patch)
treecad7a9ce6a131ee092fcd5ad555869b30761d377 /fs
parent21ff821630c0e64f5d2fab96ced72000d77fa90b (diff)
[PATCH] FDPIC: Adjust the ELF-FDPIC driver to conform more to the CodingStyle
Adjust the ELF-FDPIC binfmt driver to conform much more to the CodingStyle, silly though it may be. Further changes: (*) Drop the casts to long for addresses in kdebug() statements (they're unsigned long already). (*) Use extra variables to avoid expressions longer than 80 chars by splitting the statement into multiple statements and letting the compiler optimise them back together. (*) Eliminate duplicate call of ksize() when working out how much space was actually allocated for the stack. (*) Discard the commented-out load_shlib prototype and op pointer as this will not be supported in ELF-FDPIC for the foreseeable future. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs')
-rw-r--r--fs/binfmt_elf_fdpic.c305
1 files changed, 168 insertions, 137 deletions
diff --git a/fs/binfmt_elf_fdpic.c b/fs/binfmt_elf_fdpic.c
index 07624b95..a4ff873 100644
--- a/fs/binfmt_elf_fdpic.c
+++ b/fs/binfmt_elf_fdpic.c
@@ -1,6 +1,6 @@
/* binfmt_elf_fdpic.c: FDPIC ELF binary format
*
- * Copyright (C) 2003, 2004 Red Hat, Inc. All Rights Reserved.
+ * Copyright (C) 2003, 2004, 2006 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
* Derived from binfmt_elf.c
*
@@ -50,43 +50,45 @@ typedef char *elf_caddr_t;
MODULE_LICENSE("GPL");
-static int load_elf_fdpic_binary(struct linux_binprm *bprm, struct pt_regs *regs);
-//static int load_elf_fdpic_library(struct file *);
-static int elf_fdpic_fetch_phdrs(struct elf_fdpic_params *params, struct file *file);
-static int elf_fdpic_map_file(struct elf_fdpic_params *params,
- struct file *file,
- struct mm_struct *mm,
- const char *what);
+static int load_elf_fdpic_binary(struct linux_binprm *, struct pt_regs *);
+static int elf_fdpic_fetch_phdrs(struct elf_fdpic_params *, struct file *);
+static int elf_fdpic_map_file(struct elf_fdpic_params *, struct file *,
+ struct mm_struct *, const char *);
-static int create_elf_fdpic_tables(struct linux_binprm *bprm,
- struct mm_struct *mm,
- struct elf_fdpic_params *exec_params,
- struct elf_fdpic_params *interp_params);
+static int create_elf_fdpic_tables(struct linux_binprm *, struct mm_struct *,
+ struct elf_fdpic_params *,
+ struct elf_fdpic_params *);
#ifndef CONFIG_MMU
-static int elf_fdpic_transfer_args_to_stack(struct linux_binprm *bprm, unsigned long *_sp);
-static int elf_fdpic_map_file_constdisp_on_uclinux(struct elf_fdpic_params *params,
- struct file *file,
- struct mm_struct *mm);
+static int elf_fdpic_transfer_args_to_stack(struct linux_binprm *,
+ unsigned long *);
+static int elf_fdpic_map_file_constdisp_on_uclinux(struct elf_fdpic_params *,
+ struct file *,
+ struct mm_struct *);
#endif
-static int elf_fdpic_map_file_by_direct_mmap(struct elf_fdpic_params *params,
- struct file *file,
- struct mm_struct *mm);
+static int elf_fdpic_map_file_by_direct_mmap(struct elf_fdpic_params *,
+ struct file *, struct mm_struct *);
static struct linux_binfmt elf_fdpic_format = {
.module = THIS_MODULE,
.load_binary = load_elf_fdpic_binary,
-// .load_shlib = load_elf_fdpic_library,
// .core_dump = elf_fdpic_core_dump,
.min_coredump = ELF_EXEC_PAGESIZE,
};
-static int __init init_elf_fdpic_binfmt(void) { return register_binfmt(&elf_fdpic_format); }
-static void __exit exit_elf_fdpic_binfmt(void) { unregister_binfmt(&elf_fdpic_format); }
+static int __init init_elf_fdpic_binfmt(void)
+{
+ return register_binfmt(&elf_fdpic_format);
+}
-module_init(init_elf_fdpic_binfmt)
-module_exit(exit_elf_fdpic_binfmt)
+static void __exit exit_elf_fdpic_binfmt(void)
+{
+ unregister_binfmt(&elf_fdpic_format);
+}
+
+module_init(init_elf_fdpic_binfmt);
+module_exit(exit_elf_fdpic_binfmt);
static int is_elf_fdpic(struct elfhdr *hdr, struct file *file)
{
@@ -105,7 +107,8 @@ static int is_elf_fdpic(struct elfhdr *hdr, struct file *file)
/*
* read the program headers table into memory
*/
-static int elf_fdpic_fetch_phdrs(struct elf_fdpic_params *params, struct file *file)
+static int elf_fdpic_fetch_phdrs(struct elf_fdpic_params *params,
+ struct file *file)
{
struct elf32_phdr *phdr;
unsigned long size;
@@ -121,7 +124,8 @@ static int elf_fdpic_fetch_phdrs(struct elf_fdpic_params *params, struct file *f
if (!params->phdrs)
return -ENOMEM;
- retval = kernel_read(file, params->hdr.e_phoff, (char *) params->phdrs, size);
+ retval = kernel_read(file, params->hdr.e_phoff,
+ (char *) params->phdrs, size);
if (retval < 0)
return retval;
@@ -141,17 +145,24 @@ static int elf_fdpic_fetch_phdrs(struct elf_fdpic_params *params, struct file *f
}
return 0;
-} /* end elf_fdpic_fetch_phdrs() */
+}
/*****************************************************************************/
/*
* load an fdpic binary into various bits of memory
*/
-static int load_elf_fdpic_binary(struct linux_binprm *bprm, struct pt_regs *regs)
+static int load_elf_fdpic_binary(struct linux_binprm *bprm,
+ struct pt_regs *regs)
{
struct elf_fdpic_params exec_params, interp_params;
struct elf_phdr *phdr;
- unsigned long stack_size;
+ unsigned long stack_size, entryaddr;
+#ifndef CONFIG_MMU
+ unsigned long fullsize;
+#endif
+#ifdef ELF_FDPIC_PLAT_INIT
+ unsigned long dynaddr;
+#endif
struct file *interpreter = NULL; /* to shut gcc up */
char *interpreter_name = NULL;
int executable_stack;
@@ -212,7 +223,8 @@ static int load_elf_fdpic_binary(struct linux_binprm *bprm, struct pt_regs *regs
goto error;
}
- retval = kernel_read(interpreter, 0, bprm->buf, BINPRM_BUF_SIZE);
+ retval = kernel_read(interpreter, 0, bprm->buf,
+ BINPRM_BUF_SIZE);
if (retval < 0)
goto error;
@@ -295,7 +307,8 @@ static int load_elf_fdpic_binary(struct linux_binprm *bprm, struct pt_regs *regs
&current->mm->start_stack,
&current->mm->start_brk);
- retval = setup_arg_pages(bprm, current->mm->start_stack, executable_stack);
+ retval = setup_arg_pages(bprm, current->mm->start_stack,
+ executable_stack);
if (retval < 0) {
send_sig(SIGKILL, current, 0);
goto error_kill;
@@ -303,7 +316,8 @@ static int load_elf_fdpic_binary(struct linux_binprm *bprm, struct pt_regs *regs
#endif
/* load the executable and interpreter into memory */
- retval = elf_fdpic_map_file(&exec_params, bprm->file, current->mm, "executable");
+ retval = elf_fdpic_map_file(&exec_params, bprm->file, current->mm,
+ "executable");
if (retval < 0)
goto error_kill;
@@ -324,7 +338,8 @@ static int load_elf_fdpic_binary(struct linux_binprm *bprm, struct pt_regs *regs
if (!current->mm->start_brk)
current->mm->start_brk = current->mm->end_data;
- current->mm->brk = current->mm->start_brk = PAGE_ALIGN(current->mm->start_brk);
+ current->mm->brk = current->mm->start_brk =
+ PAGE_ALIGN(current->mm->start_brk);
#else
/* create a stack and brk area big enough for everyone
@@ -336,47 +351,45 @@ static int load_elf_fdpic_binary(struct linux_binprm *bprm, struct pt_regs *regs
stack_size = PAGE_SIZE * 2;
down_write(&current->mm->mmap_sem);
- current->mm->start_brk = do_mmap(NULL,
- 0,
- stack_size,
+ current->mm->start_brk = do_mmap(NULL, 0, stack_size,
PROT_READ | PROT_WRITE | PROT_EXEC,
MAP_PRIVATE | MAP_ANON | MAP_GROWSDOWN,
0);
- if (IS_ERR((void *) current->mm->start_brk)) {
+ if (IS_ERR_VALUE(current->mm->start_brk)) {
up_write(&current->mm->mmap_sem);
retval = current->mm->start_brk;
current->mm->start_brk = 0;
goto error_kill;
}
- if (do_mremap(current->mm->start_brk,
- stack_size,
- ksize((char *) current->mm->start_brk),
- 0, 0
- ) == current->mm->start_brk
- )
- stack_size = ksize((char *) current->mm->start_brk);
+ /* expand the stack mapping to use up the entire allocation granule */
+ fullsize = ksize((char *) current->mm->start_brk);
+ if (!IS_ERR_VALUE(do_mremap(current->mm->start_brk, stack_size,
+ fullsize, 0, 0)))
+ stack_size = fullsize;
up_write(&current->mm->mmap_sem);
current->mm->brk = current->mm->start_brk;
current->mm->context.end_brk = current->mm->start_brk;
- current->mm->context.end_brk += (stack_size > PAGE_SIZE) ? (stack_size - PAGE_SIZE) : 0;
+ current->mm->context.end_brk +=
+ (stack_size > PAGE_SIZE) ? (stack_size - PAGE_SIZE) : 0;
current->mm->start_stack = current->mm->start_brk + stack_size;
#endif
compute_creds(bprm);
current->flags &= ~PF_FORKNOEXEC;
- if (create_elf_fdpic_tables(bprm, current->mm, &exec_params, &interp_params) < 0)
+ if (create_elf_fdpic_tables(bprm, current->mm,
+ &exec_params, &interp_params) < 0)
goto error_kill;
- kdebug("- start_code %lx", (long) current->mm->start_code);
- kdebug("- end_code %lx", (long) current->mm->end_code);
- kdebug("- start_data %lx", (long) current->mm->start_data);
- kdebug("- end_data %lx", (long) current->mm->end_data);
- kdebug("- start_brk %lx", (long) current->mm->start_brk);
- kdebug("- brk %lx", (long) current->mm->brk);
- kdebug("- start_stack %lx", (long) current->mm->start_stack);
+ kdebug("- start_code %lx", current->mm->start_code);
+ kdebug("- end_code %lx", current->mm->end_code);
+ kdebug("- start_data %lx", current->mm->start_data);
+ kdebug("- end_data %lx", current->mm->end_data);
+ kdebug("- start_brk %lx", current->mm->start_brk);
+ kdebug("- brk %lx", current->mm->brk);
+ kdebug("- start_stack %lx", current->mm->start_stack);
#ifdef ELF_FDPIC_PLAT_INIT
/*
@@ -385,21 +398,18 @@ static int load_elf_fdpic_binary(struct linux_binprm *bprm, struct pt_regs *regs
* example. This macro performs whatever initialization to
* the regs structure is required.
*/
- ELF_FDPIC_PLAT_INIT(regs,
- exec_params.map_addr,
- interp_params.map_addr,
- interp_params.dynamic_addr ?: exec_params.dynamic_addr
- );
+ dynaddr = interp_params.dynamic_addr ?: exec_params.dynamic_addr;
+ ELF_FDPIC_PLAT_INIT(regs, exec_params.map_addr, interp_params.map_addr,
+ dynaddr);
#endif
/* everything is now ready... get the userspace context ready to roll */
- start_thread(regs,
- interp_params.entry_addr ?: exec_params.entry_addr,
- current->mm->start_stack);
+ entryaddr = interp_params.entry_addr ?: exec_params.entry_addr;
+ start_thread(regs, entryaddr, current->mm->start_stack);
if (unlikely(current->ptrace & PT_PTRACED)) {
if (current->ptrace & PT_TRACE_EXEC)
- ptrace_notify ((PTRACE_EVENT_EXEC << 8) | SIGTRAP);
+ ptrace_notify((PTRACE_EVENT_EXEC << 8) | SIGTRAP);
else
send_sig(SIGTRAP, current, 0);
}
@@ -419,11 +429,11 @@ error:
return retval;
/* unrecoverable error - kill the process */
- error_kill:
+error_kill:
send_sig(SIGSEGV, current, 0);
goto error;
-} /* end load_elf_fdpic_binary() */
+}
/*****************************************************************************/
/*
@@ -471,11 +481,11 @@ static int create_elf_fdpic_tables(struct linux_binprm *bprm,
#if defined(__i386__) && defined(CONFIG_SMP)
/* in some cases (e.g. Hyper-Threading), we want to avoid L1 evictions
- * by the processes running on the same package. One thing we can do
- * is to shuffle the initial stack for them.
+ * by the processes running on the same package. One thing we can do is
+ * to shuffle the initial stack for them.
*
- * the conditionals here are unneeded, but kept in to make the
- * code behaviour the same as pre change unless we have hyperthreaded
+ * the conditionals here are unneeded, but kept in to make the code
+ * behaviour the same as pre change unless we have hyperthreaded
* processors. This keeps Mr Marcelo Person happier but should be
* removed for 2.5
*/
@@ -498,11 +508,13 @@ static int create_elf_fdpic_tables(struct linux_binprm *bprm,
if (interp_params->loadmap) {
len = sizeof(struct elf32_fdpic_loadmap);
- len += sizeof(struct elf32_fdpic_loadseg) * interp_params->loadmap->nsegs;
+ len += sizeof(struct elf32_fdpic_loadseg) *
+ interp_params->loadmap->nsegs;
sp = (sp - len) & ~7UL;
interp_params->map_addr = sp;
- if (copy_to_user((void __user *) sp, interp_params->loadmap, len) != 0)
+ if (copy_to_user((void __user *) sp, interp_params->loadmap,
+ len) != 0)
return -EFAULT;
current->mm->context.interp_fdpic_loadmap = (unsigned long) sp;
@@ -526,34 +538,37 @@ static int create_elf_fdpic_tables(struct linux_binprm *bprm,
sp -= sp & 15UL;
/* put the ELF interpreter info on the stack */
-#define NEW_AUX_ENT(nr, id, val) \
- do { \
- struct { unsigned long _id, _val; } __user *ent = (void __user *) csp; \
- __put_user((id), &ent[nr]._id); \
- __put_user((val), &ent[nr]._val); \
+#define NEW_AUX_ENT(nr, id, val) \
+ do { \
+ struct { unsigned long _id, _val; } __user *ent; \
+ \
+ ent = (void __user *) csp; \
+ __put_user((id), &ent[nr]._id); \
+ __put_user((val), &ent[nr]._val); \
} while (0)
csp -= 2 * sizeof(unsigned long);
NEW_AUX_ENT(0, AT_NULL, 0);
if (k_platform) {
csp -= 2 * sizeof(unsigned long);
- NEW_AUX_ENT(0, AT_PLATFORM, (elf_addr_t)(unsigned long) u_platform);
+ NEW_AUX_ENT(0, AT_PLATFORM,
+ (elf_addr_t) (unsigned long) u_platform);
}
csp -= DLINFO_ITEMS * 2 * sizeof(unsigned long);
- NEW_AUX_ENT( 0, AT_HWCAP, hwcap);
- NEW_AUX_ENT( 1, AT_PAGESZ, PAGE_SIZE);
- NEW_AUX_ENT( 2, AT_CLKTCK, CLOCKS_PER_SEC);
- NEW_AUX_ENT( 3, AT_PHDR, exec_params->ph_addr);
- NEW_AUX_ENT( 4, AT_PHENT, sizeof(struct elf_phdr));
- NEW_AUX_ENT( 5, AT_PHNUM, exec_params->hdr.e_phnum);
- NEW_AUX_ENT( 6, AT_BASE, interp_params->elfhdr_addr);
- NEW_AUX_ENT( 7, AT_FLAGS, 0);
- NEW_AUX_ENT( 8, AT_ENTRY, exec_params->entry_addr);
- NEW_AUX_ENT( 9, AT_UID, (elf_addr_t) current->uid);
- NEW_AUX_ENT(10, AT_EUID, (elf_addr_t) current->euid);
- NEW_AUX_ENT(11, AT_GID, (elf_addr_t) current->gid);
- NEW_AUX_ENT(12, AT_EGID, (elf_addr_t) current->egid);
+ NEW_AUX_ENT( 0, AT_HWCAP, hwcap);
+ NEW_AUX_ENT( 1, AT_PAGESZ, PAGE_SIZE);
+ NEW_AUX_ENT( 2, AT_CLKTCK, CLOCKS_PER_SEC);
+ NEW_AUX_ENT( 3, AT_PHDR, exec_params->ph_addr);
+ NEW_AUX_ENT( 4, AT_PHENT, sizeof(struct elf_phdr));
+ NEW_AUX_ENT( 5, AT_PHNUM, exec_params->hdr.e_phnum);
+ NEW_AUX_ENT( 6, AT_BASE, interp_params->elfhdr_addr);
+ NEW_AUX_ENT( 7, AT_FLAGS, 0);
+ NEW_AUX_ENT( 8, AT_ENTRY, exec_params->entry_addr);
+ NEW_AUX_ENT( 9, AT_UID, (elf_addr_t) current->uid);
+ NEW_AUX_ENT(10, AT_EUID, (elf_addr_t) current->euid);
+ NEW_AUX_ENT(11, AT_GID, (elf_addr_t) current->gid);
+ NEW_AUX_ENT(12, AT_EGID, (elf_addr_t) current->egid);
#ifdef ARCH_DLINFO
/* ARCH_DLINFO must come last so platform specific code can enforce
@@ -579,7 +594,8 @@ static int create_elf_fdpic_tables(struct linux_binprm *bprm,
#ifdef CONFIG_MMU
current->mm->arg_start = bprm->p;
#else
- current->mm->arg_start = current->mm->start_stack - (MAX_ARG_PAGES * PAGE_SIZE - bprm->p);
+ current->mm->arg_start = current->mm->start_stack -
+ (MAX_ARG_PAGES * PAGE_SIZE - bprm->p);
#endif
p = (char __user *) current->mm->arg_start;
@@ -607,7 +623,7 @@ static int create_elf_fdpic_tables(struct linux_binprm *bprm,
mm->start_stack = (unsigned long) sp;
return 0;
-} /* end create_elf_fdpic_tables() */
+}
/*****************************************************************************/
/*
@@ -615,7 +631,8 @@ static int create_elf_fdpic_tables(struct linux_binprm *bprm,
* the stack
*/
#ifndef CONFIG_MMU
-static int elf_fdpic_transfer_args_to_stack(struct linux_binprm *bprm, unsigned long *_sp)
+static int elf_fdpic_transfer_args_to_stack(struct linux_binprm *bprm,
+ unsigned long *_sp)
{
unsigned long index, stop, sp;
char *src;
@@ -636,9 +653,9 @@ static int elf_fdpic_transfer_args_to_stack(struct linux_binprm *bprm, unsigned
*_sp = (*_sp - (MAX_ARG_PAGES * PAGE_SIZE - bprm->p)) & ~15;
- out:
+out:
return ret;
-} /* end elf_fdpic_transfer_args_to_stack() */
+}
#endif
/*****************************************************************************/
@@ -713,17 +730,18 @@ static int elf_fdpic_map_file(struct elf_fdpic_params *params,
seg = loadmap->segs;
for (loop = loadmap->nsegs; loop > 0; loop--, seg++) {
if (params->hdr.e_entry >= seg->p_vaddr &&
- params->hdr.e_entry < seg->p_vaddr + seg->p_memsz
- ) {
+ params->hdr.e_entry < seg->p_vaddr + seg->p_memsz) {
params->entry_addr =
- (params->hdr.e_entry - seg->p_vaddr) + seg->addr;
+ (params->hdr.e_entry - seg->p_vaddr) +
+ seg->addr;
break;
}
}
}
/* determine where the program header table has wound up if mapped */
- stop = params->hdr.e_phoff + params->hdr.e_phnum * sizeof (struct elf_phdr);
+ stop = params->hdr.e_phoff;
+ stop += params->hdr.e_phnum * sizeof (struct elf_phdr);
phdr = params->phdrs;
for (loop = 0; loop < params->hdr.e_phnum; loop++, phdr++) {
@@ -737,9 +755,11 @@ static int elf_fdpic_map_file(struct elf_fdpic_params *params,
seg = loadmap->segs;
for (loop = loadmap->nsegs; loop > 0; loop--, seg++) {
if (phdr->p_vaddr >= seg->p_vaddr &&
- phdr->p_vaddr + phdr->p_filesz <= seg->p_vaddr + seg->p_memsz
- ) {
- params->ph_addr = (phdr->p_vaddr - seg->p_vaddr) + seg->addr +
+ phdr->p_vaddr + phdr->p_filesz <=
+ seg->p_vaddr + seg->p_memsz) {
+ params->ph_addr =
+ (phdr->p_vaddr - seg->p_vaddr) +
+ seg->addr +
params->hdr.e_phoff - phdr->p_offset;
break;
}
@@ -756,18 +776,22 @@ static int elf_fdpic_map_file(struct elf_fdpic_params *params,
seg = loadmap->segs;
for (loop = loadmap->nsegs; loop > 0; loop--, seg++) {
if (phdr->p_vaddr >= seg->p_vaddr &&
- phdr->p_vaddr + phdr->p_memsz <= seg->p_vaddr + seg->p_memsz
- ) {
- params->dynamic_addr = (phdr->p_vaddr - seg->p_vaddr) + seg->addr;
-
- /* check the dynamic section contains at least one item, and that
- * the last item is a NULL entry */
+ phdr->p_vaddr + phdr->p_memsz <=
+ seg->p_vaddr + seg->p_memsz) {
+ params->dynamic_addr =
+ (phdr->p_vaddr - seg->p_vaddr) +
+ seg->addr;
+
+ /* check the dynamic section contains at least
+ * one item, and that the last item is a NULL
+ * entry */
if (phdr->p_memsz == 0 ||
phdr->p_memsz % sizeof(Elf32_Dyn) != 0)
goto dynamic_error;
tmp = phdr->p_memsz / sizeof(Elf32_Dyn);
- if (((Elf32_Dyn *) params->dynamic_addr)[tmp - 1].d_tag != 0)
+ if (((Elf32_Dyn *)
+ params->dynamic_addr)[tmp - 1].d_tag != 0)
goto dynamic_error;
break;
}
@@ -776,8 +800,8 @@ static int elf_fdpic_map_file(struct elf_fdpic_params *params,
}
/* now elide adjacent segments in the load map on MMU linux
- * - on uClinux the holes between may actually be filled with system stuff or stuff from
- * other processes
+ * - on uClinux the holes between may actually be filled with system
+ * stuff or stuff from other processes
*/
#ifdef CONFIG_MMU
nloads = loadmap->nsegs;
@@ -788,7 +812,9 @@ static int elf_fdpic_map_file(struct elf_fdpic_params *params,
if (seg->p_vaddr - mseg->p_vaddr == seg->addr - mseg->addr) {
load_addr = PAGE_ALIGN(mseg->addr + mseg->p_memsz);
if (load_addr == (seg->addr & PAGE_MASK)) {
- mseg->p_memsz += load_addr - (mseg->addr + mseg->p_memsz);
+ mseg->p_memsz +=
+ load_addr -
+ (mseg->addr + mseg->p_memsz);
mseg->p_memsz += seg->addr & ~PAGE_MASK;
mseg->p_memsz += seg->p_memsz;
loadmap->nsegs--;
@@ -816,20 +842,21 @@ static int elf_fdpic_map_file(struct elf_fdpic_params *params,
return 0;
- dynamic_error:
+dynamic_error:
printk("ELF FDPIC %s with invalid DYNAMIC section (inode=%lu)\n",
what, file->f_dentry->d_inode->i_ino);
return -ELIBBAD;
-} /* end elf_fdpic_map_file() */
+}
/*****************************************************************************/
/*
* map a file with constant displacement under uClinux
*/
#ifndef CONFIG_MMU
-static int elf_fdpic_map_file_constdisp_on_uclinux(struct elf_fdpic_params *params,
- struct file *file,
- struct mm_struct *mm)
+static int elf_fdpic_map_file_constdisp_on_uclinux(
+ struct elf_fdpic_params *params,
+ struct file *file,
+ struct mm_struct *mm)
{
struct elf32_fdpic_loadseg *seg;
struct elf32_phdr *phdr;
@@ -840,7 +867,8 @@ static int elf_fdpic_map_file_constdisp_on_uclinux(struct elf_fdpic_params *para
load_addr = params->load_addr;
seg = params->loadmap->segs;
- /* determine the bounds of the contiguous overall allocation we must make */
+ /* determine the bounds of the contiguous overall allocation we must
+ * make */
phdr = params->phdrs;
for (loop = 0; loop < params->hdr.e_phnum; loop++, phdr++) {
if (params->phdrs[loop].p_type != PT_LOAD)
@@ -861,7 +889,7 @@ static int elf_fdpic_map_file_constdisp_on_uclinux(struct elf_fdpic_params *para
maddr = do_mmap(NULL, load_addr, top - base,
PROT_READ | PROT_WRITE | PROT_EXEC, mflags, 0);
up_write(&mm->mmap_sem);
- if (IS_ERR((void *) maddr))
+ if (IS_ERR_VALUE(maddr))
return (int) maddr;
if (load_addr != 0)
@@ -879,7 +907,8 @@ static int elf_fdpic_map_file_constdisp_on_uclinux(struct elf_fdpic_params *para
seg->p_vaddr = phdr->p_vaddr;
seg->p_memsz = phdr->p_memsz;
- ret = file->f_op->read(file, (void *) seg->addr, phdr->p_filesz, &fpos);
+ ret = file->f_op->read(file, (void *) seg->addr,
+ phdr->p_filesz, &fpos);
if (ret < 0)
return ret;
@@ -896,8 +925,7 @@ static int elf_fdpic_map_file_constdisp_on_uclinux(struct elf_fdpic_params *para
if (phdr->p_flags & PF_X) {
mm->start_code = seg->addr;
mm->end_code = seg->addr + phdr->p_memsz;
- }
- else if (!mm->start_data) {
+ } else if (!mm->start_data) {
mm->start_data = seg->addr;
#ifndef CONFIG_MMU
mm->end_data = seg->addr + phdr->p_memsz;
@@ -914,7 +942,7 @@ static int elf_fdpic_map_file_constdisp_on_uclinux(struct elf_fdpic_params *para
}
return 0;
-} /* end elf_fdpic_map_file_constdisp_on_uclinux() */
+}
#endif
/*****************************************************************************/
@@ -975,14 +1003,14 @@ static int elf_fdpic_map_file_by_direct_mmap(struct elf_fdpic_params *params,
case ELF_FDPIC_FLAG_CONSTDISP:
/* constant displacement
- * - can be mapped anywhere, but must be mapped as a unit
+ * - can be mapped anywhere, but must be mapped as a
+ * unit
*/
if (!dvset) {
maddr = load_addr;
delta_vaddr = phdr->p_vaddr;
dvset = 1;
- }
- else {
+ } else {
maddr = load_addr + phdr->p_vaddr - delta_vaddr;
flags |= MAP_FIXED;
}
@@ -1006,13 +1034,14 @@ static int elf_fdpic_map_file_by_direct_mmap(struct elf_fdpic_params *params,
up_write(&mm->mmap_sem);
kdebug("mmap[%d] <file> sz=%lx pr=%x fl=%x of=%lx --> %08lx",
- loop, phdr->p_memsz + disp, prot, flags, phdr->p_offset - disp,
- maddr);
+ loop, phdr->p_memsz + disp, prot, flags,
+ phdr->p_offset - disp, maddr);
- if (IS_ERR((void *) maddr))
+ if (IS_ERR_VALUE(maddr))
return (int) maddr;
- if ((params->flags & ELF_FDPIC_FLAG_ARRANGEMENT) == ELF_FDPIC_FLAG_CONTIGUOUS)
+ if ((params->flags & ELF_FDPIC_FLAG_ARRANGEMENT) ==
+ ELF_FDPIC_FLAG_CONTIGUOUS)
load_addr += PAGE_ALIGN(phdr->p_memsz + disp);
seg->addr = maddr + disp;
@@ -1023,7 +1052,8 @@ static int elf_fdpic_map_file_by_direct_mmap(struct elf_fdpic_params *params,
if (phdr->p_offset == 0)
params->elfhdr_addr = seg->addr;
- /* clear the bit between beginning of mapping and beginning of PT_LOAD */
+ /* clear the bit between beginning of mapping and beginning of
+ * PT_LOAD */
if (prot & PROT_WRITE && disp > 0) {
kdebug("clear[%d] ad=%lx sz=%lx", loop, maddr, disp);
clear_user((void __user *) maddr, disp);
@@ -1039,19 +1069,20 @@ static int elf_fdpic_map_file_by_direct_mmap(struct elf_fdpic_params *params,
excess1 = PAGE_SIZE - ((maddr + phdr->p_filesz) & ~PAGE_MASK);
#ifdef CONFIG_MMU
-
if (excess > excess1) {
unsigned long xaddr = maddr + phdr->p_filesz + excess1;
unsigned long xmaddr;
flags |= MAP_FIXED | MAP_ANONYMOUS;
down_write(&mm->mmap_sem);
- xmaddr = do_mmap(NULL, xaddr, excess - excess1, prot, flags, 0);
+ xmaddr = do_mmap(NULL, xaddr, excess - excess1,
+ prot, flags, 0);
up_write(&mm->mmap_sem);
kdebug("mmap[%d] <anon>"
" ad=%lx sz=%lx pr=%x fl=%x of=0 --> %08lx",
- loop, xaddr, excess - excess1, prot, flags, xmaddr);
+ loop, xaddr, excess - excess1, prot, flags,
+ xmaddr);
if (xmaddr != xaddr)
return -ENOMEM;
@@ -1060,7 +1091,8 @@ static int elf_fdpic_map_file_by_direct_mmap(struct elf_fdpic_params *params,
if (prot & PROT_WRITE && excess1 > 0) {
kdebug("clear[%d] ad=%lx sz=%lx",
loop, maddr + phdr->p_filesz, excess1);
- clear_user((void __user *) maddr + phdr->p_filesz, excess1);
+ clear_user((void __user *) maddr + phdr->p_filesz,
+ excess1);
}
#else
@@ -1075,8 +1107,7 @@ static int elf_fdpic_map_file_by_direct_mmap(struct elf_fdpic_params *params,
if (phdr->p_flags & PF_X) {
mm->start_code = maddr;
mm->end_code = maddr + phdr->p_memsz;
- }
- else if (!mm->start_data) {
+ } else if (!mm->start_data) {
mm->start_data = maddr;
mm->end_data = maddr + phdr->p_memsz;
}
@@ -1086,4 +1117,4 @@ static int elf_fdpic_map_file_by_direct_mmap(struct elf_fdpic_params *params,
}
return 0;
-} /* end elf_fdpic_map_file_by_direct_mmap() */
+}

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