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-rw-r--r--fs/binfmt_elf.c1153
1 files changed, 836 insertions, 317 deletions
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index ecdffb85a..689c52f0d 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -9,15 +9,10 @@
* Copyright 1993, 1994: Eric Youngdale (ericy@cais.com).
*/
-#ifdef MODULE
#include <linux/module.h>
-#include <linux/version.h>
-#else
-#define MOD_INC_USE_COUNT
-#define MOD_DEC_USE_COUNT
-#endif
#include <linux/fs.h>
+#include <linux/stat.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/mman.h>
@@ -31,32 +26,55 @@
#include <linux/malloc.h>
#include <linux/shm.h>
#include <linux/personality.h>
+#include <linux/elfcore.h>
-#include <asm/segment.h>
+#include <asm/uaccess.h>
#include <asm/pgtable.h>
#include <linux/config.h>
-#include <linux/unistd.h>
-typedef int (*sysfun_p)(int);
-extern sysfun_p sys_call_table[];
-#define SYS(name) (sys_call_table[__NR_##name])
-
-#define DLINFO_ITEMS 8
+#define DLINFO_ITEMS 12
#include <linux/elf.h>
static int load_elf_binary(struct linux_binprm * bprm, struct pt_regs * regs);
static int load_elf_library(int fd);
+extern int dump_fpu (struct pt_regs *, elf_fpregset_t *);
+extern void dump_thread(struct pt_regs *, struct user *);
+
+/*
+ * If we don't support core dumping, then supply a NULL so we
+ * don't even try.
+ */
+#ifdef USE_ELF_CORE_DUMP
+static int elf_core_dump(long signr, struct pt_regs * regs);
+#else
+#define elf_core_dump NULL
+#endif
-struct linux_binfmt elf_format = {
+#define ELF_PAGESTART(_v) ((_v) & ~(unsigned long)(ELF_EXEC_PAGESIZE-1))
+#define ELF_PAGEOFFSET(_v) ((_v) & (ELF_EXEC_PAGESIZE-1))
+
+static struct linux_binfmt elf_format = {
#ifndef MODULE
- NULL, NULL, load_elf_binary, load_elf_library, NULL
+ NULL, NULL, load_elf_binary, load_elf_library, elf_core_dump
#else
- NULL, &mod_use_count_, load_elf_binary, load_elf_library, NULL
+ NULL, &mod_use_count_, load_elf_binary, load_elf_library, elf_core_dump
#endif
};
+static void set_brk(unsigned long start, unsigned long end)
+{
+ start = PAGE_ALIGN(start);
+ end = PAGE_ALIGN(end);
+ if (end <= start)
+ return;
+ do_mmap(NULL, start, end - start,
+ PROT_READ | PROT_WRITE | PROT_EXEC,
+ MAP_FIXED | MAP_PRIVATE, 0);
+}
+
+
/* We need to explicitly zero any fractional pages
after the data section (i.e. bss). This would
contain the junk from the file that should not
@@ -65,89 +83,77 @@ struct linux_binfmt elf_format = {
static void padzero(unsigned long elf_bss)
{
- unsigned long fpnt, nbyte;
+ unsigned long nbyte;
nbyte = elf_bss & (PAGE_SIZE-1);
if (nbyte) {
nbyte = PAGE_SIZE - nbyte;
- verify_area(VERIFY_WRITE, (void *) elf_bss, nbyte);
- fpnt = elf_bss;
- do {
- put_fs_byte(0, fpnt++);
- } while (--nbyte);
+ clear_user((void *) elf_bss, nbyte);
}
}
-unsigned long * create_elf_tables(char * p,int argc,int envc,struct elfhdr * exec, unsigned int load_addr, int ibcs)
+unsigned long * create_elf_tables(char *p, int argc, int envc,
+ struct elfhdr * exec,
+ unsigned long load_addr,
+ unsigned long interp_load_addr, int ibcs)
{
- unsigned long *argv,*envp, *dlinfo;
- unsigned long * sp;
- struct vm_area_struct *mpnt;
-
- mpnt = (struct vm_area_struct *)kmalloc(sizeof(*mpnt), GFP_KERNEL);
- if (mpnt) {
- mpnt->vm_task = current;
- mpnt->vm_start = PAGE_MASK & (unsigned long) p;
- mpnt->vm_end = TASK_SIZE;
- mpnt->vm_page_prot = PAGE_COPY;
-#ifdef VM_STACK_FLAGS
- mpnt->vm_flags = VM_STACK_FLAGS;
- mpnt->vm_pte = 0;
-#else
-# ifdef VM_GROWSDOWN
- mpnt->vm_flags = VM_GROWSDOWN;
-# endif
-#endif
- mpnt->vm_inode = NULL;
- mpnt->vm_offset = 0;
- mpnt->vm_ops = NULL;
- insert_vm_struct(current, mpnt);
-#ifndef VM_GROWSDOWN
- current->mm->stk_vma = mpnt;
-#endif
+ char **argv, **envp;
+ unsigned long *sp;
+
+ /*
+ * Force 16 byte alignment here for generality.
+ */
+ sp = (unsigned long *) (~15UL & (unsigned long) p);
+
+ /*
+ * Put the ELF interpreter info on the stack
+ */
+#define NEW_AUX_ENT(nr, id, val) \
+ __put_user ((id), sp+(nr*2)); \
+ __put_user ((val), sp+(nr*2+1)); \
+
+ sp -= 2;
+ NEW_AUX_ENT(0, AT_NULL, 0);
+
+ if (exec) {
+ sp -= 11*2;
+ NEW_AUX_ENT (0, AT_PHDR, load_addr + exec->e_phoff);
+ NEW_AUX_ENT (1, AT_PHENT, sizeof (struct elf_phdr));
+ NEW_AUX_ENT (2, AT_PHNUM, exec->e_phnum);
+ NEW_AUX_ENT (3, AT_PAGESZ, PAGE_SIZE);
+ NEW_AUX_ENT (4, AT_BASE, interp_load_addr);
+ NEW_AUX_ENT (5, AT_FLAGS, 0);
+ NEW_AUX_ENT (6, AT_ENTRY, (unsigned long) exec->e_entry);
+ NEW_AUX_ENT (7, AT_UID, (unsigned long) current->uid);
+ NEW_AUX_ENT (8, AT_EUID, (unsigned long) current->euid);
+ NEW_AUX_ENT (9, AT_GID, (unsigned long) current->gid);
+ NEW_AUX_ENT (10, AT_EGID, (unsigned long) current->egid);
}
- sp = (unsigned long *) (0xfffffffc & (unsigned long) p);
- if(exec) sp -= DLINFO_ITEMS*2;
- dlinfo = sp;
+#undef NEW_AUX_ENT
+
sp -= envc+1;
- envp = sp;
+ envp = (char **) sp;
sp -= argc+1;
- argv = sp;
+ argv = (char **) sp;
if (!ibcs) {
- put_fs_long((unsigned long)envp,--sp);
- put_fs_long((unsigned long)argv,--sp);
+ __put_user((unsigned long) envp,--sp);
+ __put_user((unsigned long) argv,--sp);
}
- /* The constant numbers (0-9) that we are writing here are
- described in the header file sys/auxv.h on at least
- some versions of SVr4 */
- if(exec) { /* Put this here for an ELF program interpreter */
- struct elf_phdr * eppnt;
- eppnt = (struct elf_phdr *) exec->e_phoff;
- put_fs_long(3,dlinfo++); put_fs_long(load_addr + exec->e_phoff,dlinfo++);
- put_fs_long(4,dlinfo++); put_fs_long(sizeof(struct elf_phdr),dlinfo++);
- put_fs_long(5,dlinfo++); put_fs_long(exec->e_phnum,dlinfo++);
- put_fs_long(9,dlinfo++); put_fs_long((unsigned long) exec->e_entry,dlinfo++);
- put_fs_long(7,dlinfo++); put_fs_long(SHM_RANGE_START,dlinfo++);
- put_fs_long(8,dlinfo++); put_fs_long(0,dlinfo++);
- put_fs_long(6,dlinfo++); put_fs_long(PAGE_SIZE,dlinfo++);
- put_fs_long(0,dlinfo++); put_fs_long(0,dlinfo++);
- };
-
- put_fs_long((unsigned long)argc,--sp);
+ __put_user((unsigned long)argc,--sp);
current->mm->arg_start = (unsigned long) p;
while (argc-->0) {
- put_fs_long((unsigned long) p,argv++);
- while (get_fs_byte(p++)) /* nothing */ ;
+ __put_user(p,argv++);
+ p += strlen_user(p);
}
- put_fs_long(0,argv);
+ __put_user(NULL, argv);
current->mm->arg_end = current->mm->env_start = (unsigned long) p;
while (envc-->0) {
- put_fs_long((unsigned long) p,envp++);
- while (get_fs_byte(p++)) /* nothing */ ;
+ __put_user(p,envp++);
+ p += strlen_user(p);
}
- put_fs_long(0,envp);
+ __put_user(NULL, envp);
current->mm->env_end = (unsigned long) p;
return sp;
}
@@ -158,102 +164,158 @@ unsigned long * create_elf_tables(char * p,int argc,int envc,struct elfhdr * exe
is only provided so that we can read a.out libraries that have
an ELF header */
-static unsigned int load_elf_interp(struct elfhdr * interp_elf_ex,
- struct inode * interpreter_inode)
+static unsigned long load_elf_interp(struct elfhdr * interp_elf_ex,
+ struct inode * interpreter_inode,
+ unsigned long *interp_load_addr)
{
- struct file * file;
+ struct file * file;
struct elf_phdr *elf_phdata = NULL;
struct elf_phdr *eppnt;
- unsigned int len;
- unsigned int load_addr;
+ unsigned long load_addr, load_off;
+ int load_addr_set = 0;
int elf_exec_fileno;
- int elf_bss;
- int old_fs, retval;
- unsigned int last_bss;
- int error;
- int i, k;
+ int retval;
+ unsigned long last_bss, elf_bss;
+ unsigned long error;
+ int i;
elf_bss = 0;
last_bss = 0;
- error = load_addr = 0;
+ error = load_off = load_addr = 0;
/* First of all, some simple consistency checks */
- if((interp_elf_ex->e_type != ET_EXEC &&
+ if ((interp_elf_ex->e_type != ET_EXEC &&
interp_elf_ex->e_type != ET_DYN) ||
- (interp_elf_ex->e_machine != EM_386 && interp_elf_ex->e_machine != EM_486) ||
+ !elf_check_arch(interp_elf_ex->e_machine) ||
(!interpreter_inode->i_op ||
!interpreter_inode->i_op->default_file_ops->mmap)){
- return 0xffffffff;
- };
+ return ~0UL;
+ }
/* Now read in all of the header information */
- if(sizeof(struct elf_phdr) * interp_elf_ex->e_phnum > PAGE_SIZE)
- return 0xffffffff;
+ if (sizeof(struct elf_phdr) * interp_elf_ex->e_phnum > PAGE_SIZE)
+ return ~0UL;
elf_phdata = (struct elf_phdr *)
- kmalloc(sizeof(struct elf_phdr) * interp_elf_ex->e_phnum, GFP_KERNEL);
- if(!elf_phdata) return 0xffffffff;
+ kmalloc(sizeof(struct elf_phdr) * interp_elf_ex->e_phnum,
+ GFP_KERNEL);
+ if (!elf_phdata)
+ return ~0UL;
- old_fs = get_fs();
- set_fs(get_ds());
- retval = read_exec(interpreter_inode, interp_elf_ex->e_phoff, (char *) elf_phdata,
- sizeof(struct elf_phdr) * interp_elf_ex->e_phnum);
- set_fs(old_fs);
+ /*
+ * If the size of this structure has changed, then punt, since
+ * we will be doing the wrong thing.
+ */
+ if (interp_elf_ex->e_phentsize != sizeof(struct elf_phdr))
+ {
+ kfree(elf_phdata);
+ return ~0UL;
+ }
+
+ retval = read_exec(interpreter_inode, interp_elf_ex->e_phoff,
+ (char *) elf_phdata,
+ sizeof(struct elf_phdr) * interp_elf_ex->e_phnum, 1);
+ if (retval < 0) {
+ kfree (elf_phdata);
+ return retval;
+ }
+
elf_exec_fileno = open_inode(interpreter_inode, O_RDONLY);
- if (elf_exec_fileno < 0) return 0xffffffff;
+ if (elf_exec_fileno < 0) {
+ kfree(elf_phdata);
+ return ~0UL;
+ }
+
file = current->files->fd[elf_exec_fileno];
eppnt = elf_phdata;
for(i=0; i<interp_elf_ex->e_phnum; i++, eppnt++)
- if(eppnt->p_type == PT_LOAD) {
- int elf_prot = (eppnt->p_flags & PF_R) ? PROT_READ : 0;
+ if (eppnt->p_type == PT_LOAD) {
+ int elf_type = MAP_PRIVATE | MAP_DENYWRITE;
+ int elf_prot = 0;
+ unsigned long vaddr = 0;
+ unsigned long k;
+
+ if (eppnt->p_flags & PF_R) elf_prot = PROT_READ;
if (eppnt->p_flags & PF_W) elf_prot |= PROT_WRITE;
if (eppnt->p_flags & PF_X) elf_prot |= PROT_EXEC;
+ if (interp_elf_ex->e_type == ET_EXEC || load_addr_set ||
+#ifdef __mips__
+ 1) /* Always load the program interpreter absolute. */
+#else
+ 0)
+#endif
+ {
+ elf_type |= MAP_FIXED;
+ vaddr = eppnt->p_vaddr;
+ }
+
error = do_mmap(file,
- eppnt->p_vaddr & 0xfffff000,
- eppnt->p_filesz + (eppnt->p_vaddr & 0xfff),
+ ELF_PAGESTART(vaddr) + load_off,
+ eppnt->p_filesz + ELF_PAGEOFFSET(eppnt->p_vaddr),
elf_prot,
- MAP_PRIVATE | MAP_DENYWRITE | (interp_elf_ex->e_type == ET_EXEC ? MAP_FIXED : 0),
- eppnt->p_offset & 0xfffff000);
+ elf_type,
+ eppnt->p_offset - ELF_PAGEOFFSET(eppnt->p_vaddr));
- if(!load_addr && interp_elf_ex->e_type == ET_DYN)
+ if (error > -1024UL) {
+ /* Real error */
+ sys_close(elf_exec_fileno);
+ kfree(elf_phdata);
+ return ~0UL;
+ }
+
+ if (!load_addr_set && interp_elf_ex->e_type == ET_DYN) {
+ load_off = error - ELF_PAGESTART(vaddr);
load_addr = error;
- k = load_addr + eppnt->p_vaddr + eppnt->p_filesz;
- if(k > elf_bss) elf_bss = k;
- if(error < 0 && error > -1024) break; /* Real error */
- k = load_addr + eppnt->p_memsz + eppnt->p_vaddr;
- if(k > last_bss) last_bss = k;
+ load_addr_set = 1;
+ }
+
+ /*
+ * Find the end of the file mapping for this phdr, and keep
+ * track of the largest address we see for this.
+ */
+ k = load_off + eppnt->p_vaddr + eppnt->p_filesz;
+ if (k > elf_bss) elf_bss = k;
+
+ /*
+ * Do the same thing for the memory mapping - between
+ * elf_bss and last_bss is the bss section.
+ */
+ k = load_off + eppnt->p_memsz + eppnt->p_vaddr;
+ if (k > last_bss) last_bss = k;
}
/* Now use mmap to map the library into memory. */
-
- SYS(close)(elf_exec_fileno);
- if(error < 0 && error > -1024) {
- kfree(elf_phdata);
- return 0xffffffff;
- }
+ sys_close(elf_exec_fileno);
+ /*
+ * Now fill out the bss section. First pad the last page up
+ * to the page boundary, and then perform a mmap to make sure
+ * that there are zeromapped pages up to and including the last
+ * bss page.
+ */
padzero(elf_bss);
- len = (elf_bss + 0xfff) & 0xfffff000; /* What we have mapped so far */
+ elf_bss = ELF_PAGESTART(elf_bss + ELF_EXEC_PAGESIZE - 1); /* What we have mapped so far */
/* Map the last of the bss segment */
- if (last_bss > len)
- do_mmap(NULL, len, last_bss-len,
+ if (last_bss > elf_bss)
+ do_mmap(NULL, elf_bss, last_bss-elf_bss,
PROT_READ|PROT_WRITE|PROT_EXEC,
MAP_FIXED|MAP_PRIVATE, 0);
kfree(elf_phdata);
- return ((unsigned int) interp_elf_ex->e_entry) + load_addr;
+ *interp_load_addr = load_addr;
+ return ((unsigned long) interp_elf_ex->e_entry) + load_off;
}
-static unsigned int load_aout_interp(struct exec * interp_ex,
+static unsigned long load_aout_interp(struct exec * interp_ex,
struct inode * interpreter_inode)
{
int retval;
- unsigned int elf_entry;
+ unsigned long elf_entry;
current->mm->brk = interp_ex->a_bss +
(current->mm->end_data = interp_ex->a_data +
@@ -266,7 +328,7 @@ static unsigned int load_aout_interp(struct exec * interp_ex,
PROT_READ|PROT_WRITE|PROT_EXEC,
MAP_FIXED|MAP_PRIVATE, 0);
retval = read_exec(interpreter_inode, 32, (char *) 0,
- interp_ex->a_text+interp_ex->a_data);
+ interp_ex->a_text+interp_ex->a_data, 0);
} else if (N_MAGIC(*interp_ex) == ZMAGIC || N_MAGIC(*interp_ex) == QMAGIC) {
do_mmap(NULL, 0, interp_ex->a_text+interp_ex->a_data,
PROT_READ|PROT_WRITE|PROT_EXEC,
@@ -274,16 +336,16 @@ static unsigned int load_aout_interp(struct exec * interp_ex,
retval = read_exec(interpreter_inode,
N_TXTOFF(*interp_ex) ,
(char *) N_TXTADDR(*interp_ex),
- interp_ex->a_text+interp_ex->a_data);
+ interp_ex->a_text+interp_ex->a_data, 0);
} else
retval = -1;
- if(retval >= 0)
- do_mmap(NULL, (interp_ex->a_text + interp_ex->a_data + 0xfff) &
- 0xfffff000, interp_ex->a_bss,
+ if (retval >= 0)
+ do_mmap(NULL, ELF_PAGESTART(interp_ex->a_text + interp_ex->a_data + ELF_EXEC_PAGESIZE - 1),
+ interp_ex->a_bss,
PROT_READ|PROT_WRITE|PROT_EXEC,
MAP_FIXED|MAP_PRIVATE, 0);
- if(retval < 0) return 0xffffffff;
+ if (retval < 0) return ~0UL;
return elf_entry;
}
@@ -297,15 +359,16 @@ static unsigned int load_aout_interp(struct exec * interp_ex,
#define INTERPRETER_ELF 2
-static int
-load_elf_binary(struct linux_binprm * bprm, struct pt_regs * regs)
+static inline int
+do_load_elf_binary(struct linux_binprm * bprm, struct pt_regs * regs)
{
struct elfhdr elf_ex;
struct elfhdr interp_elf_ex;
struct file * file;
struct exec interp_ex;
struct inode *interpreter_inode;
- unsigned int load_addr;
+ unsigned long load_addr;
+ int load_addr_set = 0;
unsigned int interpreter_type = INTERPRETER_NONE;
unsigned char ibcs2_interpreter;
int i;
@@ -313,17 +376,15 @@ load_elf_binary(struct linux_binprm * bprm, struct pt_regs * regs)
int error;
struct elf_phdr * elf_ppnt, *elf_phdata;
int elf_exec_fileno;
- unsigned int elf_bss, k, elf_brk;
+ unsigned long elf_bss, k, elf_brk;
int retval;
char * elf_interpreter;
- unsigned int elf_entry;
+ unsigned long elf_entry, interp_load_addr = 0;
int status;
- unsigned int start_code, end_code, end_data;
- unsigned int elf_stack;
+ unsigned long start_code, end_code, end_data;
+ unsigned long elf_stack;
char passed_fileno[6];
- MOD_INC_USE_COUNT;
-
ibcs2_interpreter = 0;
status = 0;
load_addr = 0;
@@ -331,33 +392,31 @@ load_elf_binary(struct linux_binprm * bprm, struct pt_regs * regs)
if (elf_ex.e_ident[0] != 0x7f ||
strncmp(&elf_ex.e_ident[1], "ELF",3) != 0) {
- MOD_DEC_USE_COUNT;
return -ENOEXEC;
}
/* First of all, some simple consistency checks */
- if(elf_ex.e_type != ET_EXEC ||
- (elf_ex.e_machine != EM_386 && elf_ex.e_machine != EM_486) ||
+ if ((elf_ex.e_type != ET_EXEC &&
+ elf_ex.e_type != ET_DYN) ||
+ (! elf_check_arch(elf_ex.e_machine)) ||
(!bprm->inode->i_op || !bprm->inode->i_op->default_file_ops ||
!bprm->inode->i_op->default_file_ops->mmap)){
- MOD_DEC_USE_COUNT;
return -ENOEXEC;
- };
+ }
/* Now read in all of the header information */
elf_phdata = (struct elf_phdr *) kmalloc(elf_ex.e_phentsize *
elf_ex.e_phnum, GFP_KERNEL);
+ if (elf_phdata == NULL) {
+ return -ENOMEM;
+ }
- old_fs = get_fs();
- set_fs(get_ds());
retval = read_exec(bprm->inode, elf_ex.e_phoff, (char *) elf_phdata,
- elf_ex.e_phentsize * elf_ex.e_phnum);
- set_fs(old_fs);
+ elf_ex.e_phentsize * elf_ex.e_phnum, 1);
if (retval < 0) {
- kfree (elf_phdata);
- MOD_DEC_USE_COUNT;
+ kfree (elf_phdata);
return retval;
}
@@ -369,32 +428,44 @@ load_elf_binary(struct linux_binprm * bprm, struct pt_regs * regs)
elf_exec_fileno = open_inode(bprm->inode, O_RDONLY);
if (elf_exec_fileno < 0) {
- kfree (elf_phdata);
- MOD_DEC_USE_COUNT;
+ kfree (elf_phdata);
return elf_exec_fileno;
}
file = current->files->fd[elf_exec_fileno];
- elf_stack = 0xffffffff;
+ elf_stack = ~0UL;
elf_interpreter = NULL;
- start_code = 0;
+ start_code = ~0UL;
end_code = 0;
end_data = 0;
- old_fs = get_fs();
- set_fs(get_ds());
-
for(i=0;i < elf_ex.e_phnum; i++){
- if(elf_ppnt->p_type == PT_INTERP) {
- /* This is the program interpreter used for shared libraries -
- for now assume that this is an a.out format binary */
+ if (elf_ppnt->p_type == PT_INTERP) {
+ if ( elf_interpreter != NULL )
+ {
+ kfree (elf_phdata);
+ kfree(elf_interpreter);
+ sys_close(elf_exec_fileno);
+ return -EINVAL;
+ }
+
+ /* This is the program interpreter used for
+ * shared libraries - for now assume that this
+ * is an a.out format binary
+ */
elf_interpreter = (char *) kmalloc(elf_ppnt->p_filesz,
GFP_KERNEL);
+ if (elf_interpreter == NULL) {
+ kfree (elf_phdata);
+ sys_close(elf_exec_fileno);
+ return -ENOMEM;
+ }
- retval = read_exec(bprm->inode,elf_ppnt->p_offset,elf_interpreter,
- elf_ppnt->p_filesz);
+ retval = read_exec(bprm->inode,elf_ppnt->p_offset,
+ elf_interpreter,
+ elf_ppnt->p_filesz, 1);
/* If the program interpreter is one of these two,
then assume an iBCS2 image. Otherwise assume
a native linux image. */
@@ -404,54 +475,48 @@ load_elf_binary(struct linux_binprm * bprm, struct pt_regs * regs)
#if 0
printk("Using ELF interpreter %s\n", elf_interpreter);
#endif
- if(retval >= 0)
- retval = namei(elf_interpreter, &interpreter_inode);
- if(retval >= 0)
- retval = read_exec(interpreter_inode,0,bprm->buf,128);
+ if (retval >= 0)
+ retval = knamei(elf_interpreter, &interpreter_inode);
+
+ if (retval >= 0)
+ retval = read_exec(interpreter_inode,0,bprm->buf,128, 1);
- if(retval >= 0){
+ if (retval >= 0) {
interp_ex = *((struct exec *) bprm->buf); /* exec-header */
interp_elf_ex = *((struct elfhdr *) bprm->buf); /* exec-header */
- };
- if(retval < 0) {
- kfree (elf_phdata);
- kfree(elf_interpreter);
- MOD_DEC_USE_COUNT;
- return retval;
- };
- };
+ }
+ if (retval < 0) {
+ kfree (elf_phdata);
+ kfree(elf_interpreter);
+ sys_close(elf_exec_fileno);
+ return retval;
+ }
+ }
elf_ppnt++;
- };
-
- set_fs(old_fs);
-
+ }
+
/* Some simple consistency checks for the interpreter */
- if(elf_interpreter){
- interpreter_type = INTERPRETER_ELF | INTERPRETER_AOUT;
- if(retval < 0) {
- kfree(elf_interpreter);
- kfree(elf_phdata);
- MOD_DEC_USE_COUNT;
- return -ELIBACC;
- };
+ if (elf_interpreter){
+ interpreter_type = INTERPRETER_ELF | INTERPRETER_AOUT;
+
/* Now figure out which format our binary is */
- if((N_MAGIC(interp_ex) != OMAGIC) &&
- (N_MAGIC(interp_ex) != ZMAGIC) &&
- (N_MAGIC(interp_ex) != QMAGIC))
+ if ((N_MAGIC(interp_ex) != OMAGIC) &&
+ (N_MAGIC(interp_ex) != ZMAGIC) &&
+ (N_MAGIC(interp_ex) != QMAGIC))
interpreter_type = INTERPRETER_ELF;
if (interp_elf_ex.e_ident[0] != 0x7f ||
strncmp(&interp_elf_ex.e_ident[1], "ELF",3) != 0)
interpreter_type &= ~INTERPRETER_ELF;
- if(!interpreter_type)
+ if (!interpreter_type)
{
kfree(elf_interpreter);
kfree(elf_phdata);
- MOD_DEC_USE_COUNT;
+ sys_close(elf_exec_fileno);
return -ELIBBAD;
- };
+ }
}
/* OK, we are done with that, now set up the arg stuff,
@@ -460,21 +525,21 @@ load_elf_binary(struct linux_binprm * bprm, struct pt_regs * regs)
if (!bprm->sh_bang) {
char * passed_p;
- if(interpreter_type == INTERPRETER_AOUT) {
+ if (interpreter_type == INTERPRETER_AOUT) {
sprintf(passed_fileno, "%d", elf_exec_fileno);
passed_p = passed_fileno;
- if(elf_interpreter) {
+ if (elf_interpreter) {
bprm->p = copy_strings(1,&passed_p,bprm->page,bprm->p,2);
bprm->argc++;
- };
- };
+ }
+ }
if (!bprm->p) {
- if(elf_interpreter) {
+ if (elf_interpreter) {
kfree(elf_interpreter);
}
- kfree (elf_phdata);
- MOD_DEC_USE_COUNT;
+ kfree (elf_phdata);
+ sys_close(elf_exec_fileno);
return -E2BIG;
}
}
@@ -486,12 +551,12 @@ load_elf_binary(struct linux_binprm * bprm, struct pt_regs * regs)
current->mm->end_code = 0;
current->mm->start_mmap = ELF_START_MMAP;
current->mm->mmap = NULL;
- elf_entry = (unsigned int) elf_ex.e_entry;
+ elf_entry = (unsigned long) elf_ex.e_entry;
/* Do this so that we can load the interpreter, if need be. We will
change some of these later */
current->mm->rss = 0;
- bprm->p += setup_arg_pages(0, bprm->page);
+ bprm->p = setup_arg_pages(bprm->p, bprm);
current->mm->start_stack = bprm->p;
/* Now we do a little grungy work by mmaping the ELF image into
@@ -501,72 +566,72 @@ load_elf_binary(struct linux_binprm * bprm, struct pt_regs * regs)
old_fs = get_fs();
set_fs(get_ds());
-
- elf_ppnt = elf_phdata;
- for(i=0;i < elf_ex.e_phnum; i++){
-
- if(elf_ppnt->p_type == PT_INTERP) {
- /* Set these up so that we are able to load the interpreter */
- /* Now load the interpreter into user address space */
- set_fs(old_fs);
-
- if(interpreter_type & 1) elf_entry =
- load_aout_interp(&interp_ex, interpreter_inode);
-
- if(interpreter_type & 2) elf_entry =
- load_elf_interp(&interp_elf_ex, interpreter_inode);
-
- old_fs = get_fs();
- set_fs(get_ds());
-
- iput(interpreter_inode);
- kfree(elf_interpreter);
-
- if(elf_entry == 0xffffffff) {
- printk("Unable to load interpreter\n");
- kfree(elf_phdata);
- send_sig(SIGSEGV, current, 0);
- MOD_DEC_USE_COUNT;
- return 0;
- };
- };
-
-
- if(elf_ppnt->p_type == PT_LOAD) {
- int elf_prot = (elf_ppnt->p_flags & PF_R) ? PROT_READ : 0;
+ for(i = 0, elf_ppnt = elf_phdata; i < elf_ex.e_phnum; i++, elf_ppnt++) {
+ if (elf_ppnt->p_type == PT_LOAD) {
+ int elf_prot = 0;
+ if (elf_ppnt->p_flags & PF_R) elf_prot |= PROT_READ;
if (elf_ppnt->p_flags & PF_W) elf_prot |= PROT_WRITE;
if (elf_ppnt->p_flags & PF_X) elf_prot |= PROT_EXEC;
+
error = do_mmap(file,
- elf_ppnt->p_vaddr & 0xfffff000,
- elf_ppnt->p_filesz + (elf_ppnt->p_vaddr & 0xfff),
+ ELF_PAGESTART(elf_ppnt->p_vaddr),
+ (elf_ppnt->p_filesz +
+ ELF_PAGEOFFSET(elf_ppnt->p_vaddr)),
elf_prot,
- MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE | MAP_EXECUTABLE,
- elf_ppnt->p_offset & 0xfffff000);
+ (MAP_FIXED | MAP_PRIVATE |
+ MAP_DENYWRITE | MAP_EXECUTABLE),
+ (elf_ppnt->p_offset -
+ ELF_PAGEOFFSET(elf_ppnt->p_vaddr)));
#ifdef LOW_ELF_STACK
- if(elf_ppnt->p_vaddr & 0xfffff000 < elf_stack)
- elf_stack = elf_ppnt->p_vaddr & 0xfffff000;
+ if (ELF_PAGESTART(elf_ppnt->p_vaddr) < elf_stack)
+ elf_stack = ELF_PAGESTART(elf_ppnt->p_vaddr);
#endif
- if(!load_addr)
+ if (!load_addr_set) {
load_addr = elf_ppnt->p_vaddr - elf_ppnt->p_offset;
+ load_addr_set = 1;
+ }
k = elf_ppnt->p_vaddr;
- if(k > start_code) start_code = k;
+ if (k < start_code) start_code = k;
k = elf_ppnt->p_vaddr + elf_ppnt->p_filesz;
- if(k > elf_bss) elf_bss = k;
- if((elf_ppnt->p_flags | PROT_WRITE) && end_code < k)
+ if (k > elf_bss) elf_bss = k;
+#if 1
+ if ((elf_ppnt->p_flags & PF_X) && end_code < k)
+#else
+ if ( !(elf_ppnt->p_flags & PF_W) && end_code < k)
+#endif
end_code = k;
- if(end_data < k) end_data = k;
+ if (end_data < k) end_data = k;
k = elf_ppnt->p_vaddr + elf_ppnt->p_memsz;
- if(k > elf_brk) elf_brk = k;
- };
- elf_ppnt++;
- };
+ if (k > elf_brk) elf_brk = k;
+ }
+ }
set_fs(old_fs);
-
+
+ if (elf_interpreter) {
+ if (interpreter_type & 1)
+ elf_entry = load_aout_interp(&interp_ex,
+ interpreter_inode);
+ else if (interpreter_type & 2)
+ elf_entry = load_elf_interp(&interp_elf_ex,
+ interpreter_inode,
+ &interp_load_addr);
+
+ iput(interpreter_inode);
+ kfree(elf_interpreter);
+
+ if (elf_entry == ~0UL) {
+ printk("Unable to load interpreter\n");
+ kfree(elf_phdata);
+ send_sig(SIGSEGV, current, 0);
+ return 0;
+ }
+ }
+
kfree(elf_phdata);
- if(interpreter_type != INTERPRETER_AOUT) SYS(close)(elf_exec_fileno);
+ if (interpreter_type != INTERPRETER_AOUT) sys_close(elf_exec_fileno);
current->personality = (ibcs2_interpreter ? PER_SVR4 : PER_LINUX);
if (current->exec_domain && current->exec_domain->use_count)
@@ -585,30 +650,30 @@ load_elf_binary(struct linux_binprm * bprm, struct pt_regs * regs)
bprm->inode->i_count++;
#endif
#ifdef LOW_ELF_STACK
- current->start_stack = p = elf_stack - 4;
+ current->start_stack = bprm->p = elf_stack - 4;
#endif
- bprm->p -= MAX_ARG_PAGES*PAGE_SIZE;
+ current->suid = current->euid = current->fsuid = bprm->e_uid;
+ current->sgid = current->egid = current->fsgid = bprm->e_gid;
+ current->flags &= ~PF_FORKNOEXEC;
bprm->p = (unsigned long)
create_elf_tables((char *)bprm->p,
bprm->argc,
bprm->envc,
(interpreter_type == INTERPRETER_ELF ? &elf_ex : NULL),
- load_addr,
+ load_addr,
+ interp_load_addr,
(interpreter_type == INTERPRETER_AOUT ? 0 : 1));
- if(interpreter_type == INTERPRETER_AOUT)
+ if (interpreter_type == INTERPRETER_AOUT)
current->mm->arg_start += strlen(passed_fileno) + 1;
current->mm->start_brk = current->mm->brk = elf_brk;
current->mm->end_code = end_code;
current->mm->start_code = start_code;
current->mm->end_data = end_data;
current->mm->start_stack = bprm->p;
- current->suid = current->euid = current->fsuid = bprm->e_uid;
- current->sgid = current->egid = current->fsgid = bprm->e_gid;
- /* Calling sys_brk effectively mmaps the pages that we need for the bss and break
+ /* Calling set_brk effectively mmaps the pages that we need for the bss and break
sections */
- current->mm->brk = (elf_bss + 0xfff) & 0xfffff000;
- SYS(brk)((elf_brk + 0xfff) & 0xfffff000);
+ set_brk(elf_bss, elf_brk);
padzero(elf_bss);
@@ -621,7 +686,7 @@ load_elf_binary(struct linux_binprm * bprm, struct pt_regs * regs)
printk("(brk) %x\n" , current->mm->brk);
#endif
- if( current->personality == PER_SVR4 )
+ if ( current->personality == PER_SVR4 )
{
/* Why this, you ask??? Well SVr4 maps page 0 as read-only,
and some applications "depend" upon this behavior.
@@ -631,133 +696,587 @@ load_elf_binary(struct linux_binprm * bprm, struct pt_regs * regs)
MAP_FIXED | MAP_PRIVATE, 0);
}
+#ifdef ELF_PLAT_INIT
+ /*
+ * The ABI may specify that certain registers be set up in special
+ * ways (on i386 %edx is the address of a DT_FINI function, for
+ * example. This macro performs whatever initialization to
+ * the regs structure is required.
+ */
+ ELF_PLAT_INIT(regs);
+#endif
+
+
start_thread(regs, elf_entry, bprm->p);
if (current->flags & PF_PTRACED)
send_sig(SIGTRAP, current, 0);
- MOD_DEC_USE_COUNT;
return 0;
}
+static int
+load_elf_binary(struct linux_binprm * bprm, struct pt_regs * regs)
+{
+ int retval;
+
+ MOD_INC_USE_COUNT;
+ retval = do_load_elf_binary(bprm, regs);
+ MOD_DEC_USE_COUNT;
+ return retval;
+}
+
/* This is really simpleminded and specialized - we are loading an
a.out library that is given an ELF header. */
-static int
-load_elf_library(int fd){
- struct file * file;
+static inline int
+do_load_elf_library(int fd){
+ struct file * file;
struct elfhdr elf_ex;
struct elf_phdr *elf_phdata = NULL;
struct inode * inode;
- unsigned int len;
+ unsigned long len;
int elf_bss;
- int old_fs, retval;
- unsigned int bss;
+ int retval;
+ unsigned long bss;
int error;
int i,j, k;
- MOD_INC_USE_COUNT;
len = 0;
file = current->files->fd[fd];
inode = file->f_inode;
elf_bss = 0;
- set_fs(KERNEL_DS);
- if (file->f_op->read(inode, file, (char *) &elf_ex, sizeof(elf_ex)) != sizeof(elf_ex)) {
- SYS(close)(fd);
- MOD_DEC_USE_COUNT;
+ if (!file || !file->f_op)
return -EACCES;
- }
+
+ /* seek to the beginning of the file */
+ if (file->f_op->llseek) {
+ if ((error = file->f_op->llseek(inode, file, 0, 0)) != 0)
+ return -ENOEXEC;
+ } else
+ file->f_pos = 0;
+
+ set_fs(KERNEL_DS);
+ error = file->f_op->read(inode, file, (char *) &elf_ex, sizeof(elf_ex));
set_fs(USER_DS);
-
+ if (error != sizeof(elf_ex))
+ return -ENOEXEC;
+
if (elf_ex.e_ident[0] != 0x7f ||
- strncmp(&elf_ex.e_ident[1], "ELF",3) != 0) {
- MOD_DEC_USE_COUNT;
+ strncmp(&elf_ex.e_ident[1], "ELF",3) != 0)
return -ENOEXEC;
- }
-
+
/* First of all, some simple consistency checks */
- if(elf_ex.e_type != ET_EXEC || elf_ex.e_phnum > 2 ||
- (elf_ex.e_machine != EM_386 && elf_ex.e_machine != EM_486) ||
- (!inode->i_op || !inode->i_op->default_file_ops->mmap)){
- MOD_DEC_USE_COUNT;
+ if (elf_ex.e_type != ET_EXEC || elf_ex.e_phnum > 2 ||
+ !elf_check_arch(elf_ex.e_machine) ||
+ (!inode->i_op || !inode->i_op->default_file_ops->mmap))
return -ENOEXEC;
- };
/* Now read in all of the header information */
- if(sizeof(struct elf_phdr) * elf_ex.e_phnum > PAGE_SIZE) {
- MOD_DEC_USE_COUNT;
+ if (sizeof(struct elf_phdr) * elf_ex.e_phnum > PAGE_SIZE)
return -ENOEXEC;
- }
elf_phdata = (struct elf_phdr *)
kmalloc(sizeof(struct elf_phdr) * elf_ex.e_phnum, GFP_KERNEL);
+ if (elf_phdata == NULL)
+ return -ENOMEM;
- old_fs = get_fs();
- set_fs(get_ds());
retval = read_exec(inode, elf_ex.e_phoff, (char *) elf_phdata,
- sizeof(struct elf_phdr) * elf_ex.e_phnum);
- set_fs(old_fs);
+ sizeof(struct elf_phdr) * elf_ex.e_phnum, 1);
j = 0;
for(i=0; i<elf_ex.e_phnum; i++)
- if((elf_phdata + i)->p_type == PT_LOAD) j++;
+ if ((elf_phdata + i)->p_type == PT_LOAD) j++;
- if(j != 1) {
+ if (j != 1) {
kfree(elf_phdata);
- MOD_DEC_USE_COUNT;
return -ENOEXEC;
- };
+ }
while(elf_phdata->p_type != PT_LOAD) elf_phdata++;
/* Now use mmap to map the library into memory. */
error = do_mmap(file,
- elf_phdata->p_vaddr & 0xfffff000,
- elf_phdata->p_filesz + (elf_phdata->p_vaddr & 0xfff),
+ ELF_PAGESTART(elf_phdata->p_vaddr),
+ (elf_phdata->p_filesz +
+ ELF_PAGEOFFSET(elf_phdata->p_vaddr)),
PROT_READ | PROT_WRITE | PROT_EXEC,
MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE,
- elf_phdata->p_offset & 0xfffff000);
+ (elf_phdata->p_offset -
+ ELF_PAGEOFFSET(elf_phdata->p_vaddr)));
k = elf_phdata->p_vaddr + elf_phdata->p_filesz;
- if(k > elf_bss) elf_bss = k;
+ if (k > elf_bss) elf_bss = k;
- SYS(close)(fd);
- if (error != elf_phdata->p_vaddr & 0xfffff000) {
- kfree(elf_phdata);
- MOD_DEC_USE_COUNT;
+ if (error != ELF_PAGESTART(elf_phdata->p_vaddr)) {
+ kfree(elf_phdata);
return error;
}
padzero(elf_bss);
- len = (elf_phdata->p_filesz + elf_phdata->p_vaddr+ 0xfff) & 0xfffff000;
+ len = ELF_PAGESTART(elf_phdata->p_filesz + elf_phdata->p_vaddr+ ELF_EXEC_PAGESIZE - 1);
bss = elf_phdata->p_memsz + elf_phdata->p_vaddr;
if (bss > len)
do_mmap(NULL, len, bss-len,
PROT_READ|PROT_WRITE|PROT_EXEC,
MAP_FIXED|MAP_PRIVATE, 0);
kfree(elf_phdata);
- MOD_DEC_USE_COUNT;
return 0;
}
+static int load_elf_library(int fd)
+{
+ int retval;
+
+ MOD_INC_USE_COUNT;
+ retval = do_load_elf_library(fd);
+ MOD_DEC_USE_COUNT;
+ return retval;
+}
+
+/*
+ * Note that some platforms still use traditional core dumps and not
+ * the ELF core dump. Each platform can select it as appropriate.
+ */
+#ifdef USE_ELF_CORE_DUMP
+
+/*
+ * ELF core dumper
+ *
+ * Modelled on fs/exec.c:aout_core_dump()
+ * Jeremy Fitzhardinge <jeremy@sw.oz.au>
+ */
+/*
+ * These are the only things you should do on a core-file: use only these
+ * functions to write out all the necessary info.
+ */
+static int dump_write(struct file *file, const void *addr, int nr)
+{
+ return file->f_op->write(file->f_inode, file, addr, nr) == nr;
+}
+
+static int dump_seek(struct file *file, off_t off)
+{
+ if (file->f_op->llseek) {
+ if (file->f_op->llseek(file->f_inode, file, off, 0) != off)
+ return 0;
+ } else
+ file->f_pos = off;
+ return 1;
+}
+
+/*
+ * Decide whether a segment is worth dumping; default is yes to be
+ * sure (missing info is worse than too much; etc).
+ * Personally I'd include everything, and use the coredump limit...
+ *
+ * I think we should skip something. But I am not sure how. H.J.
+ */
+static inline int maydump(struct vm_area_struct *vma)
+{
+ if (!(vma->vm_flags & (VM_READ|VM_WRITE|VM_EXEC)))
+ return 0;
+#if 1
+ if (vma->vm_flags & (VM_WRITE|VM_GROWSUP|VM_GROWSDOWN))
+ return 1;
+ if (vma->vm_flags & (VM_READ|VM_EXEC|VM_EXECUTABLE|VM_SHARED))
+ return 0;
+#endif
+ return 1;
+}
+
+#define roundup(x, y) ((((x)+((y)-1))/(y))*(y))
+
+/* An ELF note in memory */
+struct memelfnote
+{
+ const char *name;
+ int type;
+ unsigned int datasz;
+ void *data;
+};
+
+static int notesize(struct memelfnote *en)
+{
+ int sz;
+
+ sz = sizeof(struct elf_note);
+ sz += roundup(strlen(en->name), 4);
+ sz += roundup(en->datasz, 4);
+
+ return sz;
+}
+
+/* #define DEBUG */
+
+#if defined (DEBUG) && defined (__i386__)
+static void dump_regs(const char *str, elf_greg_t *r)
+{
+ int i;
+ static const char *regs[] = { "ebx", "ecx", "edx", "esi", "edi", "ebp",
+ "eax", "ds", "es", "fs", "gs",
+ "orig_eax", "eip", "cs",
+ "efl", "uesp", "ss"};
+ printk("Registers: %s\n", str);
+
+ for(i = 0; i < ELF_NGREG; i++)
+ {
+ unsigned long val = r[i];
+ printk(" %-2d %-5s=%08lx %lu\n", i, regs[i], val, val);
+ }
+}
+#endif
+
+#define DUMP_WRITE(addr, nr) \
+ do { if (!dump_write(file, (addr), (nr))) return 0; } while(0)
+#define DUMP_SEEK(off) \
+ do { if (!dump_seek(file, (off))) return 0; } while(0)
+
+static int writenote(struct memelfnote *men, struct file *file)
+{
+ struct elf_note en;
+
+ en.n_namesz = strlen(men->name);
+ en.n_descsz = men->datasz;
+ en.n_type = men->type;
+
+ DUMP_WRITE(&en, sizeof(en));
+ DUMP_WRITE(men->name, en.n_namesz);
+ /* XXX - cast from long long to long to avoid need for libgcc.a */
+ DUMP_SEEK(roundup((unsigned long)file->f_pos, 4)); /* XXX */
+ DUMP_WRITE(men->data, men->datasz);
+ DUMP_SEEK(roundup((unsigned long)file->f_pos, 4)); /* XXX */
+
+ return 1;
+}
+#undef DUMP_WRITE
+#undef DUMP_SEEK
+
+#define DUMP_WRITE(addr, nr) \
+ if (!dump_write(&file, (addr), (nr))) \
+ goto close_coredump;
+#define DUMP_SEEK(off) \
+ if (!dump_seek(&file, (off))) \
+ goto close_coredump;
+/*
+ * Actual dumper
+ *
+ * This is a two-pass process; first we find the offsets of the bits,
+ * and then they are actually written out. If we run out of core limit
+ * we just truncate.
+ */
+static int elf_core_dump(long signr, struct pt_regs * regs)
+{
+ int has_dumped = 0;
+ struct file file;
+ struct inode *inode;
+ unsigned short fs;
+ char corefile[6+sizeof(current->comm)];
+ int segs;
+ int i;
+ size_t size;
+ struct vm_area_struct *vma;
+ struct elfhdr elf;
+ off_t offset = 0, dataoff;
+ int limit = current->rlim[RLIMIT_CORE].rlim_cur;
+ int numnote = 4;
+ struct memelfnote notes[4];
+ struct elf_prstatus prstatus; /* NT_PRSTATUS */
+ elf_fpregset_t fpu; /* NT_PRFPREG */
+ struct elf_prpsinfo psinfo; /* NT_PRPSINFO */
+
+ if (!current->dumpable || limit < PAGE_SIZE || current->mm->count != 1)
+ return 0;
+ current->dumpable = 0;
+
+#ifndef CONFIG_BINFMT_ELF
+ MOD_INC_USE_COUNT;
+#endif
+
+ /* Count what's needed to dump, up to the limit of coredump size */
+ segs = 0;
+ size = 0;
+ for(vma = current->mm->mmap; vma != NULL; vma = vma->vm_next) {
+ if (maydump(vma))
+ {
+ int sz = vma->vm_end-vma->vm_start;
+
+ if (size+sz >= limit)
+ break;
+ else
+ size += sz;
+ }
+
+ segs++;
+ }
+#ifdef DEBUG
+ printk("elf_core_dump: %d segs taking %d bytes\n", segs, size);
+#endif
+
+ /* Set up header */
+ memcpy(elf.e_ident, ELFMAG, SELFMAG);
+ elf.e_ident[EI_CLASS] = ELF_CLASS;
+ elf.e_ident[EI_DATA] = ELF_DATA;
+ elf.e_ident[EI_VERSION] = EV_CURRENT;
+ memset(elf.e_ident+EI_PAD, 0, EI_NIDENT-EI_PAD);
+
+ elf.e_type = ET_CORE;
+ elf.e_machine = ELF_ARCH;
+ elf.e_version = EV_CURRENT;
+ elf.e_entry = 0;
+ elf.e_phoff = sizeof(elf);
+ elf.e_shoff = 0;
+ elf.e_flags = 0;
+ elf.e_ehsize = sizeof(elf);
+ elf.e_phentsize = sizeof(struct elf_phdr);
+ elf.e_phnum = segs+1; /* Include notes */
+ elf.e_shentsize = 0;
+ elf.e_shnum = 0;
+ elf.e_shstrndx = 0;
+
+ fs = get_fs();
+ set_fs(KERNEL_DS);
+ memcpy(corefile,"core.",5);
+#if 0
+ memcpy(corefile+5,current->comm,sizeof(current->comm));
+#else
+ corefile[4] = '\0';
+#endif
+ if (open_namei(corefile,O_CREAT | 2 | O_TRUNC,0600,&inode,NULL)) {
+ inode = NULL;
+ goto end_coredump;
+ }
+ if (!S_ISREG(inode->i_mode))
+ goto end_coredump;
+ if (!inode->i_op || !inode->i_op->default_file_ops)
+ goto end_coredump;
+ file.f_mode = 3;
+ file.f_flags = 0;
+ file.f_count = 1;
+ file.f_inode = inode;
+ file.f_pos = 0;
+ file.f_reada = 0;
+ file.f_op = inode->i_op->default_file_ops;
+ if (file.f_op->open)
+ if (file.f_op->open(inode,&file))
+ goto end_coredump;
+ if (!file.f_op->write)
+ goto close_coredump;
+ has_dumped = 1;
+ current->flags |= PF_DUMPCORE;
+
+ DUMP_WRITE(&elf, sizeof(elf));
+ offset += sizeof(elf); /* Elf header */
+ offset += (segs+1) * sizeof(struct elf_phdr); /* Program headers */
+
+ /*
+ * Set up the notes in similar form to SVR4 core dumps made
+ * with info from their /proc.
+ */
+ memset(&psinfo, 0, sizeof(psinfo));
+ memset(&prstatus, 0, sizeof(prstatus));
+
+ notes[0].name = "CORE";
+ notes[0].type = NT_PRSTATUS;
+ notes[0].datasz = sizeof(prstatus);
+ notes[0].data = &prstatus;
+ prstatus.pr_info.si_signo = prstatus.pr_cursig = signr;
+ copy_sigbits32(&prstatus.pr_sigpend, current->signal);
+ copy_sigbits32(&prstatus.pr_sighold, current->blocked);
+ psinfo.pr_pid = prstatus.pr_pid = current->pid;
+ psinfo.pr_ppid = prstatus.pr_ppid = current->p_pptr->pid;
+ psinfo.pr_pgrp = prstatus.pr_pgrp = current->pgrp;
+ psinfo.pr_sid = prstatus.pr_sid = current->session;
+ prstatus.pr_utime.tv_sec = CT_TO_SECS(current->utime);
+ prstatus.pr_utime.tv_usec = CT_TO_USECS(current->utime);
+ prstatus.pr_stime.tv_sec = CT_TO_SECS(current->stime);
+ prstatus.pr_stime.tv_usec = CT_TO_USECS(current->stime);
+ prstatus.pr_cutime.tv_sec = CT_TO_SECS(current->cutime);
+ prstatus.pr_cutime.tv_usec = CT_TO_USECS(current->cutime);
+ prstatus.pr_cstime.tv_sec = CT_TO_SECS(current->cstime);
+ prstatus.pr_cstime.tv_usec = CT_TO_USECS(current->cstime);
+
+ /*
+ * This transfers the registers from regs into the standard
+ * coredump arrangement, whatever that is.
+ */
+#ifdef ELF_CORE_COPY_REGS
+ ELF_CORE_COPY_REGS(prstatus.pr_reg, regs)
+#else
+ if (sizeof(elf_gregset_t) != sizeof(struct pt_regs))
+ {
+ printk("sizeof(elf_gregset_t) (%d) != sizeof(struct pt_regs) (%d)\n",
+ sizeof(elf_gregset_t), sizeof(struct pt_regs));
+ }
+ else
+ *(struct pt_regs *)&prstatus.pr_reg = *regs;
+#endif
+
+#if defined (DEBUG) && defined (__i386__)
+ dump_regs("Passed in regs", (elf_greg_t *)regs);
+ dump_regs("prstatus regs", (elf_greg_t *)&prstatus.pr_reg);
+#endif
+
+ notes[1].name = "CORE";
+ notes[1].type = NT_PRPSINFO;
+ notes[1].datasz = sizeof(psinfo);
+ notes[1].data = &psinfo;
+ psinfo.pr_state = current->state;
+ psinfo.pr_sname = (current->state < 0 || current->state > 5) ? '.' : "RSDZTD"[current->state];
+ psinfo.pr_zomb = psinfo.pr_sname == 'Z';
+ psinfo.pr_nice = current->priority-15;
+ psinfo.pr_flag = current->flags;
+ psinfo.pr_uid = current->uid;
+ psinfo.pr_gid = current->gid;
+ {
+ int i, len;
+
+ set_fs(fs);
+
+ len = current->mm->arg_end - current->mm->arg_start;
+ len = len >= ELF_PRARGSZ ? ELF_PRARGSZ : len;
+ copy_from_user(&psinfo.pr_psargs,
+ (const char *)current->mm->arg_start, len);
+ for(i = 0; i < len; i++)
+ if (psinfo.pr_psargs[i] == 0)
+ psinfo.pr_psargs[i] = ' ';
+ psinfo.pr_psargs[len] = 0;
+
+ set_fs(KERNEL_DS);
+ }
+ strncpy(psinfo.pr_fname, current->comm, sizeof(psinfo.pr_fname));
+
+ notes[2].name = "CORE";
+ notes[2].type = NT_TASKSTRUCT;
+ notes[2].datasz = sizeof(*current);
+ notes[2].data = current;
+
+ /* Try to dump the fpu. */
+ prstatus.pr_fpvalid = dump_fpu (regs, &fpu);
+ if (!prstatus.pr_fpvalid)
+ {
+ numnote--;
+ }
+ else
+ {
+ notes[3].name = "CORE";
+ notes[3].type = NT_PRFPREG;
+ notes[3].datasz = sizeof(fpu);
+ notes[3].data = &fpu;
+ }
+
+ /* Write notes phdr entry */
+ {
+ struct elf_phdr phdr;
+ int sz = 0;
+
+ for(i = 0; i < numnote; i++)
+ sz += notesize(&notes[i]);
+
+ phdr.p_type = PT_NOTE;
+ phdr.p_offset = offset;
+ phdr.p_vaddr = 0;
+ phdr.p_paddr = 0;
+ phdr.p_filesz = sz;
+ phdr.p_memsz = 0;
+ phdr.p_flags = 0;
+ phdr.p_align = 0;
+
+ offset += phdr.p_filesz;
+ DUMP_WRITE(&phdr, sizeof(phdr));
+ }
+
+ /* Page-align dumped data */
+ dataoff = offset = roundup(offset, PAGE_SIZE);
+
+ /* Write program headers for segments dump */
+ for(vma = current->mm->mmap, i = 0;
+ i < segs && vma != NULL; vma = vma->vm_next) {
+ struct elf_phdr phdr;
+ size_t sz;
+
+ i++;
+
+ sz = vma->vm_end - vma->vm_start;
+
+ phdr.p_type = PT_LOAD;
+ phdr.p_offset = offset;
+ phdr.p_vaddr = vma->vm_start;
+ phdr.p_paddr = 0;
+ phdr.p_filesz = maydump(vma) ? sz : 0;
+ phdr.p_memsz = sz;
+ offset += phdr.p_filesz;
+ phdr.p_flags = vma->vm_flags & VM_READ ? PF_R : 0;
+ if (vma->vm_flags & VM_WRITE) phdr.p_flags |= PF_W;
+ if (vma->vm_flags & VM_EXEC) phdr.p_flags |= PF_X;
+ phdr.p_align = PAGE_SIZE;
+
+ DUMP_WRITE(&phdr, sizeof(phdr));
+ }
+
+ for(i = 0; i < numnote; i++)
+ if (!writenote(&notes[i], &file))
+ goto close_coredump;
+
+ set_fs(fs);
+
+ DUMP_SEEK(dataoff);
+
+ for(i = 0, vma = current->mm->mmap;
+ i < segs && vma != NULL;
+ vma = vma->vm_next) {
+ unsigned long addr = vma->vm_start;
+ unsigned long len = vma->vm_end - vma->vm_start;
+
+ if (!maydump(vma))
+ continue;
+ i++;
+#ifdef DEBUG
+ printk("elf_core_dump: writing %08lx %lx\n", addr, len);
+#endif
+ DUMP_WRITE((void *)addr, len);
+ }
+
+ if ((off_t) file.f_pos != offset) {
+ /* Sanity check */
+ printk("elf_core_dump: file.f_pos (%ld) != offset (%ld)\n",
+ (off_t) file.f_pos, offset);
+ }
+
+ close_coredump:
+ if (file.f_op->release)
+ file.f_op->release(inode,&file);
+
+ end_coredump:
+ set_fs(fs);
+ iput(inode);
+#ifndef CONFIG_BINFMT_ELF
+ MOD_DEC_USE_COUNT;
+#endif
+ return has_dumped;
+}
+#endif /* USE_ELF_CORE_DUMP */
+
+int init_elf_binfmt(void)
+{
+ return register_binfmt(&elf_format);
+}
+
#ifdef MODULE
-char kernel_version[] = UTS_RELEASE;
-int init_module(void) {
+int init_module(void)
+{
/* Install the COFF, ELF and XOUT loaders.
* N.B. We *rely* on the table being the right size with the
* right number of free slots...
*/
- register_binfmt(&elf_format);
- return 0;
+ return init_elf_binfmt();
}
-void cleanup_module( void) {
-
- if (MOD_IN_USE)
- printk(KERN_INFO "iBCS: module is in use, remove delayed\n");
+void cleanup_module( void)
+{
/* Remove the COFF and ELF loaders. */
unregister_binfmt(&elf_format);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-09-20 05:49:16 +0000