diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/x86/ia32/ia32_aout.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/x86/ia32/ia32_aout.c | 514 |
1 files changed, 0 insertions, 514 deletions
diff --git a/ANDROID_3.4.5/arch/x86/ia32/ia32_aout.c b/ANDROID_3.4.5/arch/x86/ia32/ia32_aout.c deleted file mode 100644 index 07b3a68d..00000000 --- a/ANDROID_3.4.5/arch/x86/ia32/ia32_aout.c +++ /dev/null @@ -1,514 +0,0 @@ -/* - * a.out loader for x86-64 - * - * Copyright (C) 1991, 1992, 1996 Linus Torvalds - * Hacked together by Andi Kleen - */ - -#include <linux/module.h> - -#include <linux/time.h> -#include <linux/kernel.h> -#include <linux/mm.h> -#include <linux/mman.h> -#include <linux/a.out.h> -#include <linux/errno.h> -#include <linux/signal.h> -#include <linux/string.h> -#include <linux/fs.h> -#include <linux/file.h> -#include <linux/stat.h> -#include <linux/fcntl.h> -#include <linux/ptrace.h> -#include <linux/user.h> -#include <linux/binfmts.h> -#include <linux/personality.h> -#include <linux/init.h> -#include <linux/jiffies.h> - -#include <asm/uaccess.h> -#include <asm/pgalloc.h> -#include <asm/cacheflush.h> -#include <asm/user32.h> -#include <asm/ia32.h> - -#undef WARN_OLD -#undef CORE_DUMP /* definitely broken */ - -static int load_aout_binary(struct linux_binprm *, struct pt_regs *regs); -static int load_aout_library(struct file *); - -#ifdef CORE_DUMP -static int aout_core_dump(long signr, struct pt_regs *regs, struct file *file, - unsigned long limit); - -/* - * fill in the user structure for a core dump.. - */ -static void dump_thread32(struct pt_regs *regs, struct user32 *dump) -{ - u32 fs, gs; - -/* changed the size calculations - should hopefully work better. lbt */ - dump->magic = CMAGIC; - dump->start_code = 0; - dump->start_stack = regs->sp & ~(PAGE_SIZE - 1); - dump->u_tsize = ((unsigned long) current->mm->end_code) >> PAGE_SHIFT; - dump->u_dsize = ((unsigned long) - (current->mm->brk + (PAGE_SIZE-1))) >> PAGE_SHIFT; - dump->u_dsize -= dump->u_tsize; - dump->u_ssize = 0; - dump->u_debugreg[0] = current->thread.debugreg0; - dump->u_debugreg[1] = current->thread.debugreg1; - dump->u_debugreg[2] = current->thread.debugreg2; - dump->u_debugreg[3] = current->thread.debugreg3; - dump->u_debugreg[4] = 0; - dump->u_debugreg[5] = 0; - dump->u_debugreg[6] = current->thread.debugreg6; - dump->u_debugreg[7] = current->thread.debugreg7; - - if (dump->start_stack < 0xc0000000) { - unsigned long tmp; - - tmp = (unsigned long) (0xc0000000 - dump->start_stack); - dump->u_ssize = tmp >> PAGE_SHIFT; - } - - dump->regs.bx = regs->bx; - dump->regs.cx = regs->cx; - dump->regs.dx = regs->dx; - dump->regs.si = regs->si; - dump->regs.di = regs->di; - dump->regs.bp = regs->bp; - dump->regs.ax = regs->ax; - dump->regs.ds = current->thread.ds; - dump->regs.es = current->thread.es; - savesegment(fs, fs); - dump->regs.fs = fs; - savesegment(gs, gs); - dump->regs.gs = gs; - dump->regs.orig_ax = regs->orig_ax; - dump->regs.ip = regs->ip; - dump->regs.cs = regs->cs; - dump->regs.flags = regs->flags; - dump->regs.sp = regs->sp; - dump->regs.ss = regs->ss; - -#if 1 /* FIXME */ - dump->u_fpvalid = 0; -#else - dump->u_fpvalid = dump_fpu(regs, &dump->i387); -#endif -} - -#endif - -static struct linux_binfmt aout_format = { - .module = THIS_MODULE, - .load_binary = load_aout_binary, - .load_shlib = load_aout_library, -#ifdef CORE_DUMP - .core_dump = aout_core_dump, -#endif - .min_coredump = PAGE_SIZE -}; - -static void set_brk(unsigned long start, unsigned long end) -{ - start = PAGE_ALIGN(start); - end = PAGE_ALIGN(end); - if (end <= start) - return; - vm_brk(start, end - start); -} - -#ifdef CORE_DUMP -/* - * These are the only things you should do on a core-file: use only these - * macros to write out all the necessary info. - */ - -#include <linux/coredump.h> - -#define DUMP_WRITE(addr, nr) \ - if (!dump_write(file, (void *)(addr), (nr))) \ - goto end_coredump; - -#define DUMP_SEEK(offset) \ - if (!dump_seek(file, offset)) \ - goto end_coredump; - -#define START_DATA() (u.u_tsize << PAGE_SHIFT) -#define START_STACK(u) (u.start_stack) - -/* - * Routine writes a core dump image in the current directory. - * Currently only a stub-function. - * - * Note that setuid/setgid files won't make a core-dump if the uid/gid - * changed due to the set[u|g]id. It's enforced by the "current->mm->dumpable" - * field, which also makes sure the core-dumps won't be recursive if the - * dumping of the process results in another error.. - */ - -static int aout_core_dump(long signr, struct pt_regs *regs, struct file *file, - unsigned long limit) -{ - mm_segment_t fs; - int has_dumped = 0; - unsigned long dump_start, dump_size; - struct user32 dump; - - fs = get_fs(); - set_fs(KERNEL_DS); - has_dumped = 1; - current->flags |= PF_DUMPCORE; - strncpy(dump.u_comm, current->comm, sizeof(current->comm)); - dump.u_ar0 = offsetof(struct user32, regs); - dump.signal = signr; - dump_thread32(regs, &dump); - - /* - * If the size of the dump file exceeds the rlimit, then see - * what would happen if we wrote the stack, but not the data - * area. - */ - if ((dump.u_dsize + dump.u_ssize + 1) * PAGE_SIZE > limit) - dump.u_dsize = 0; - - /* Make sure we have enough room to write the stack and data areas. */ - if ((dump.u_ssize + 1) * PAGE_SIZE > limit) - dump.u_ssize = 0; - - /* make sure we actually have a data and stack area to dump */ - set_fs(USER_DS); - if (!access_ok(VERIFY_READ, (void *) (unsigned long)START_DATA(dump), - dump.u_dsize << PAGE_SHIFT)) - dump.u_dsize = 0; - if (!access_ok(VERIFY_READ, (void *) (unsigned long)START_STACK(dump), - dump.u_ssize << PAGE_SHIFT)) - dump.u_ssize = 0; - - set_fs(KERNEL_DS); - /* struct user */ - DUMP_WRITE(&dump, sizeof(dump)); - /* Now dump all of the user data. Include malloced stuff as well */ - DUMP_SEEK(PAGE_SIZE); - /* now we start writing out the user space info */ - set_fs(USER_DS); - /* Dump the data area */ - if (dump.u_dsize != 0) { - dump_start = START_DATA(dump); - dump_size = dump.u_dsize << PAGE_SHIFT; - DUMP_WRITE(dump_start, dump_size); - } - /* Now prepare to dump the stack area */ - if (dump.u_ssize != 0) { - dump_start = START_STACK(dump); - dump_size = dump.u_ssize << PAGE_SHIFT; - DUMP_WRITE(dump_start, dump_size); - } -end_coredump: - set_fs(fs); - return has_dumped; -} -#endif - -/* - * create_aout_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. - */ -static u32 __user *create_aout_tables(char __user *p, struct linux_binprm *bprm) -{ - u32 __user *argv, *envp, *sp; - int argc = bprm->argc, envc = bprm->envc; - - sp = (u32 __user *) ((-(unsigned long)sizeof(u32)) & (unsigned long) p); - sp -= envc+1; - envp = sp; - sp -= argc+1; - argv = sp; - put_user((unsigned long) envp, --sp); - put_user((unsigned long) argv, --sp); - put_user(argc, --sp); - current->mm->arg_start = (unsigned long) p; - while (argc-- > 0) { - char c; - - put_user((u32)(unsigned long)p, argv++); - do { - get_user(c, p++); - } while (c); - } - put_user(0, argv); - current->mm->arg_end = current->mm->env_start = (unsigned long) p; - while (envc-- > 0) { - char c; - - put_user((u32)(unsigned long)p, envp++); - do { - get_user(c, p++); - } while (c); - } - put_user(0, envp); - current->mm->env_end = (unsigned long) p; - return sp; -} - -/* - * These are the functions used to load a.out style executables and shared - * libraries. There is no binary dependent code anywhere else. - */ -static int load_aout_binary(struct linux_binprm *bprm, struct pt_regs *regs) -{ - unsigned long error, fd_offset, rlim; - struct exec ex; - int retval; - - ex = *((struct exec *) bprm->buf); /* exec-header */ - if ((N_MAGIC(ex) != ZMAGIC && N_MAGIC(ex) != OMAGIC && - N_MAGIC(ex) != QMAGIC && N_MAGIC(ex) != NMAGIC) || - N_TRSIZE(ex) || N_DRSIZE(ex) || - i_size_read(bprm->file->f_path.dentry->d_inode) < - ex.a_text+ex.a_data+N_SYMSIZE(ex)+N_TXTOFF(ex)) { - return -ENOEXEC; - } - - fd_offset = N_TXTOFF(ex); - - /* Check initial limits. This avoids letting people circumvent - * size limits imposed on them by creating programs with large - * arrays in the data or bss. - */ - rlim = rlimit(RLIMIT_DATA); - if (rlim >= RLIM_INFINITY) - rlim = ~0; - if (ex.a_data + ex.a_bss > rlim) - return -ENOMEM; - - /* Flush all traces of the currently running executable */ - retval = flush_old_exec(bprm); - if (retval) - return retval; - - /* OK, This is the point of no return */ - set_personality(PER_LINUX); - set_personality_ia32(false); - - setup_new_exec(bprm); - - regs->cs = __USER32_CS; - regs->r8 = regs->r9 = regs->r10 = regs->r11 = regs->r12 = - regs->r13 = regs->r14 = regs->r15 = 0; - - current->mm->end_code = ex.a_text + - (current->mm->start_code = N_TXTADDR(ex)); - current->mm->end_data = ex.a_data + - (current->mm->start_data = N_DATADDR(ex)); - current->mm->brk = ex.a_bss + - (current->mm->start_brk = N_BSSADDR(ex)); - current->mm->free_area_cache = TASK_UNMAPPED_BASE; - current->mm->cached_hole_size = 0; - - retval = setup_arg_pages(bprm, IA32_STACK_TOP, EXSTACK_DEFAULT); - if (retval < 0) { - /* Someone check-me: is this error path enough? */ - send_sig(SIGKILL, current, 0); - return retval; - } - - install_exec_creds(bprm); - - if (N_MAGIC(ex) == OMAGIC) { - unsigned long text_addr, map_size; - loff_t pos; - - text_addr = N_TXTADDR(ex); - - pos = 32; - map_size = ex.a_text+ex.a_data; - - error = vm_brk(text_addr & PAGE_MASK, map_size); - - if (error != (text_addr & PAGE_MASK)) { - send_sig(SIGKILL, current, 0); - return error; - } - - error = bprm->file->f_op->read(bprm->file, - (char __user *)text_addr, - ex.a_text+ex.a_data, &pos); - if ((signed long)error < 0) { - send_sig(SIGKILL, current, 0); - return error; - } - - flush_icache_range(text_addr, text_addr+ex.a_text+ex.a_data); - } else { -#ifdef WARN_OLD - static unsigned long error_time, error_time2; - if ((ex.a_text & 0xfff || ex.a_data & 0xfff) && - (N_MAGIC(ex) != NMAGIC) && - time_after(jiffies, error_time2 + 5*HZ)) { - printk(KERN_NOTICE "executable not page aligned\n"); - error_time2 = jiffies; - } - - if ((fd_offset & ~PAGE_MASK) != 0 && - time_after(jiffies, error_time + 5*HZ)) { - printk(KERN_WARNING - "fd_offset is not page aligned. Please convert " - "program: %s\n", - bprm->file->f_path.dentry->d_name.name); - error_time = jiffies; - } -#endif - - if (!bprm->file->f_op->mmap || (fd_offset & ~PAGE_MASK) != 0) { - loff_t pos = fd_offset; - - vm_brk(N_TXTADDR(ex), ex.a_text+ex.a_data); - bprm->file->f_op->read(bprm->file, - (char __user *)N_TXTADDR(ex), - ex.a_text+ex.a_data, &pos); - flush_icache_range((unsigned long) N_TXTADDR(ex), - (unsigned long) N_TXTADDR(ex) + - ex.a_text+ex.a_data); - goto beyond_if; - } - - error = vm_mmap(bprm->file, N_TXTADDR(ex), ex.a_text, - PROT_READ | PROT_EXEC, - MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE | - MAP_EXECUTABLE | MAP_32BIT, - fd_offset); - - if (error != N_TXTADDR(ex)) { - send_sig(SIGKILL, current, 0); - return error; - } - - error = vm_mmap(bprm->file, N_DATADDR(ex), ex.a_data, - PROT_READ | PROT_WRITE | PROT_EXEC, - MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE | - MAP_EXECUTABLE | MAP_32BIT, - fd_offset + ex.a_text); - if (error != N_DATADDR(ex)) { - send_sig(SIGKILL, current, 0); - return error; - } - } -beyond_if: - set_binfmt(&aout_format); - - set_brk(current->mm->start_brk, current->mm->brk); - - current->mm->start_stack = - (unsigned long)create_aout_tables((char __user *)bprm->p, bprm); - /* start thread */ - loadsegment(fs, 0); - loadsegment(ds, __USER32_DS); - loadsegment(es, __USER32_DS); - load_gs_index(0); - (regs)->ip = ex.a_entry; - (regs)->sp = current->mm->start_stack; - (regs)->flags = 0x200; - (regs)->cs = __USER32_CS; - (regs)->ss = __USER32_DS; - regs->r8 = regs->r9 = regs->r10 = regs->r11 = - regs->r12 = regs->r13 = regs->r14 = regs->r15 = 0; - set_fs(USER_DS); - return 0; -} - -static int load_aout_library(struct file *file) -{ - struct inode *inode; - unsigned long bss, start_addr, len, error; - int retval; - struct exec ex; - - inode = file->f_path.dentry->d_inode; - - retval = -ENOEXEC; - error = kernel_read(file, 0, (char *) &ex, sizeof(ex)); - if (error != sizeof(ex)) - goto out; - - /* We come in here for the regular a.out style of shared libraries */ - if ((N_MAGIC(ex) != ZMAGIC && N_MAGIC(ex) != QMAGIC) || N_TRSIZE(ex) || - N_DRSIZE(ex) || ((ex.a_entry & 0xfff) && N_MAGIC(ex) == ZMAGIC) || - i_size_read(inode) < - ex.a_text+ex.a_data+N_SYMSIZE(ex)+N_TXTOFF(ex)) { - goto out; - } - - if (N_FLAGS(ex)) - goto out; - - /* For QMAGIC, the starting address is 0x20 into the page. We mask - this off to get the starting address for the page */ - - start_addr = ex.a_entry & 0xfffff000; - - if ((N_TXTOFF(ex) & ~PAGE_MASK) != 0) { - loff_t pos = N_TXTOFF(ex); - -#ifdef WARN_OLD - static unsigned long error_time; - if (time_after(jiffies, error_time + 5*HZ)) { - printk(KERN_WARNING - "N_TXTOFF is not page aligned. Please convert " - "library: %s\n", - file->f_path.dentry->d_name.name); - error_time = jiffies; - } -#endif - vm_brk(start_addr, ex.a_text + ex.a_data + ex.a_bss); - - file->f_op->read(file, (char __user *)start_addr, - ex.a_text + ex.a_data, &pos); - flush_icache_range((unsigned long) start_addr, - (unsigned long) start_addr + ex.a_text + - ex.a_data); - - retval = 0; - goto out; - } - /* Now use mmap to map the library into memory. */ - error = vm_mmap(file, start_addr, ex.a_text + ex.a_data, - PROT_READ | PROT_WRITE | PROT_EXEC, - MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE | MAP_32BIT, - N_TXTOFF(ex)); - retval = error; - if (error != start_addr) - goto out; - - len = PAGE_ALIGN(ex.a_text + ex.a_data); - bss = ex.a_text + ex.a_data + ex.a_bss; - if (bss > len) { - error = vm_brk(start_addr + len, bss - len); - retval = error; - if (error != start_addr + len) - goto out; - } - retval = 0; -out: - return retval; -} - -static int __init init_aout_binfmt(void) -{ - register_binfmt(&aout_format); - return 0; -} - -static void __exit exit_aout_binfmt(void) -{ - unregister_binfmt(&aout_format); -} - -module_init(init_aout_binfmt); -module_exit(exit_aout_binfmt); -MODULE_LICENSE("GPL"); |