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-rw-r--r--arch/x86/ia32/Makefile14
-rw-r--r--arch/x86/ia32/audit.c42
-rw-r--r--arch/x86/ia32/ia32_aout.c514
-rw-r--r--arch/x86/ia32/ia32_signal.c562
-rw-r--r--arch/x86/ia32/ia32entry.S493
-rw-r--r--arch/x86/ia32/ipc32.c54
-rw-r--r--arch/x86/ia32/nosyscall.c7
-rw-r--r--arch/x86/ia32/sys_ia32.c516
-rw-r--r--arch/x86/ia32/syscall_ia32.c25
9 files changed, 2227 insertions, 0 deletions
diff --git a/arch/x86/ia32/Makefile b/arch/x86/ia32/Makefile
new file mode 100644
index 00000000..455646e0
--- /dev/null
+++ b/arch/x86/ia32/Makefile
@@ -0,0 +1,14 @@
+#
+# Makefile for the ia32 kernel emulation subsystem.
+#
+
+obj-$(CONFIG_IA32_EMULATION) := ia32entry.o sys_ia32.o ia32_signal.o
+obj-$(CONFIG_IA32_EMULATION) += nosyscall.o syscall_ia32.o
+
+sysv-$(CONFIG_SYSVIPC) := ipc32.o
+obj-$(CONFIG_IA32_EMULATION) += $(sysv-y)
+
+obj-$(CONFIG_IA32_AOUT) += ia32_aout.o
+
+audit-class-$(CONFIG_AUDIT) := audit.o
+obj-$(CONFIG_IA32_EMULATION) += $(audit-class-y)
diff --git a/arch/x86/ia32/audit.c b/arch/x86/ia32/audit.c
new file mode 100644
index 00000000..5d7b381d
--- /dev/null
+++ b/arch/x86/ia32/audit.c
@@ -0,0 +1,42 @@
+#include <asm/unistd_32.h>
+
+unsigned ia32_dir_class[] = {
+#include <asm-generic/audit_dir_write.h>
+~0U
+};
+
+unsigned ia32_chattr_class[] = {
+#include <asm-generic/audit_change_attr.h>
+~0U
+};
+
+unsigned ia32_write_class[] = {
+#include <asm-generic/audit_write.h>
+~0U
+};
+
+unsigned ia32_read_class[] = {
+#include <asm-generic/audit_read.h>
+~0U
+};
+
+unsigned ia32_signal_class[] = {
+#include <asm-generic/audit_signal.h>
+~0U
+};
+
+int ia32_classify_syscall(unsigned syscall)
+{
+ switch (syscall) {
+ case __NR_open:
+ return 2;
+ case __NR_openat:
+ return 3;
+ case __NR_socketcall:
+ return 4;
+ case __NR_execve:
+ return 5;
+ default:
+ return 1;
+ }
+}
diff --git a/arch/x86/ia32/ia32_aout.c b/arch/x86/ia32/ia32_aout.c
new file mode 100644
index 00000000..07b3a68d
--- /dev/null
+++ b/arch/x86/ia32/ia32_aout.c
@@ -0,0 +1,514 @@
+/*
+ * 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");
diff --git a/arch/x86/ia32/ia32_signal.c b/arch/x86/ia32/ia32_signal.c
new file mode 100644
index 00000000..4f5bfacf
--- /dev/null
+++ b/arch/x86/ia32/ia32_signal.c
@@ -0,0 +1,562 @@
+/*
+ * linux/arch/x86_64/ia32/ia32_signal.c
+ *
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ *
+ * 1997-11-28 Modified for POSIX.1b signals by Richard Henderson
+ * 2000-06-20 Pentium III FXSR, SSE support by Gareth Hughes
+ * 2000-12-* x86-64 compatibility mode signal handling by Andi Kleen
+ */
+
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/wait.h>
+#include <linux/unistd.h>
+#include <linux/stddef.h>
+#include <linux/personality.h>
+#include <linux/compat.h>
+#include <linux/binfmts.h>
+#include <asm/ucontext.h>
+#include <asm/uaccess.h>
+#include <asm/i387.h>
+#include <asm/fpu-internal.h>
+#include <asm/ptrace.h>
+#include <asm/ia32_unistd.h>
+#include <asm/user32.h>
+#include <asm/sigcontext32.h>
+#include <asm/proto.h>
+#include <asm/vdso.h>
+#include <asm/sigframe.h>
+#include <asm/sighandling.h>
+#include <asm/sys_ia32.h>
+
+#define FIX_EFLAGS __FIX_EFLAGS
+
+int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from)
+{
+ int err = 0;
+ bool ia32 = test_thread_flag(TIF_IA32);
+
+ if (!access_ok(VERIFY_WRITE, to, sizeof(compat_siginfo_t)))
+ return -EFAULT;
+
+ put_user_try {
+ /* If you change siginfo_t structure, please make sure that
+ this code is fixed accordingly.
+ It should never copy any pad contained in the structure
+ to avoid security leaks, but must copy the generic
+ 3 ints plus the relevant union member. */
+ put_user_ex(from->si_signo, &to->si_signo);
+ put_user_ex(from->si_errno, &to->si_errno);
+ put_user_ex((short)from->si_code, &to->si_code);
+
+ if (from->si_code < 0) {
+ put_user_ex(from->si_pid, &to->si_pid);
+ put_user_ex(from->si_uid, &to->si_uid);
+ put_user_ex(ptr_to_compat(from->si_ptr), &to->si_ptr);
+ } else {
+ /*
+ * First 32bits of unions are always present:
+ * si_pid === si_band === si_tid === si_addr(LS half)
+ */
+ put_user_ex(from->_sifields._pad[0],
+ &to->_sifields._pad[0]);
+ switch (from->si_code >> 16) {
+ case __SI_FAULT >> 16:
+ break;
+ case __SI_CHLD >> 16:
+ if (ia32) {
+ put_user_ex(from->si_utime, &to->si_utime);
+ put_user_ex(from->si_stime, &to->si_stime);
+ } else {
+ put_user_ex(from->si_utime, &to->_sifields._sigchld_x32._utime);
+ put_user_ex(from->si_stime, &to->_sifields._sigchld_x32._stime);
+ }
+ put_user_ex(from->si_status, &to->si_status);
+ /* FALL THROUGH */
+ default:
+ case __SI_KILL >> 16:
+ put_user_ex(from->si_uid, &to->si_uid);
+ break;
+ case __SI_POLL >> 16:
+ put_user_ex(from->si_fd, &to->si_fd);
+ break;
+ case __SI_TIMER >> 16:
+ put_user_ex(from->si_overrun, &to->si_overrun);
+ put_user_ex(ptr_to_compat(from->si_ptr),
+ &to->si_ptr);
+ break;
+ /* This is not generated by the kernel as of now. */
+ case __SI_RT >> 16:
+ case __SI_MESGQ >> 16:
+ put_user_ex(from->si_uid, &to->si_uid);
+ put_user_ex(from->si_int, &to->si_int);
+ break;
+ }
+ }
+ } put_user_catch(err);
+
+ return err;
+}
+
+int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from)
+{
+ int err = 0;
+ u32 ptr32;
+
+ if (!access_ok(VERIFY_READ, from, sizeof(compat_siginfo_t)))
+ return -EFAULT;
+
+ get_user_try {
+ get_user_ex(to->si_signo, &from->si_signo);
+ get_user_ex(to->si_errno, &from->si_errno);
+ get_user_ex(to->si_code, &from->si_code);
+
+ get_user_ex(to->si_pid, &from->si_pid);
+ get_user_ex(to->si_uid, &from->si_uid);
+ get_user_ex(ptr32, &from->si_ptr);
+ to->si_ptr = compat_ptr(ptr32);
+ } get_user_catch(err);
+
+ return err;
+}
+
+asmlinkage long sys32_sigsuspend(int history0, int history1, old_sigset_t mask)
+{
+ sigset_t blocked;
+
+ current->saved_sigmask = current->blocked;
+
+ mask &= _BLOCKABLE;
+ siginitset(&blocked, mask);
+ set_current_blocked(&blocked);
+
+ current->state = TASK_INTERRUPTIBLE;
+ schedule();
+
+ set_restore_sigmask();
+ return -ERESTARTNOHAND;
+}
+
+asmlinkage long sys32_sigaltstack(const stack_ia32_t __user *uss_ptr,
+ stack_ia32_t __user *uoss_ptr,
+ struct pt_regs *regs)
+{
+ stack_t uss, uoss;
+ int ret, err = 0;
+ mm_segment_t seg;
+
+ if (uss_ptr) {
+ u32 ptr;
+
+ memset(&uss, 0, sizeof(stack_t));
+ if (!access_ok(VERIFY_READ, uss_ptr, sizeof(stack_ia32_t)))
+ return -EFAULT;
+
+ get_user_try {
+ get_user_ex(ptr, &uss_ptr->ss_sp);
+ get_user_ex(uss.ss_flags, &uss_ptr->ss_flags);
+ get_user_ex(uss.ss_size, &uss_ptr->ss_size);
+ } get_user_catch(err);
+
+ if (err)
+ return -EFAULT;
+ uss.ss_sp = compat_ptr(ptr);
+ }
+ seg = get_fs();
+ set_fs(KERNEL_DS);
+ ret = do_sigaltstack(uss_ptr ? &uss : NULL, &uoss, regs->sp);
+ set_fs(seg);
+ if (ret >= 0 && uoss_ptr) {
+ if (!access_ok(VERIFY_WRITE, uoss_ptr, sizeof(stack_ia32_t)))
+ return -EFAULT;
+
+ put_user_try {
+ put_user_ex(ptr_to_compat(uoss.ss_sp), &uoss_ptr->ss_sp);
+ put_user_ex(uoss.ss_flags, &uoss_ptr->ss_flags);
+ put_user_ex(uoss.ss_size, &uoss_ptr->ss_size);
+ } put_user_catch(err);
+
+ if (err)
+ ret = -EFAULT;
+ }
+ return ret;
+}
+
+/*
+ * Do a signal return; undo the signal stack.
+ */
+#define loadsegment_gs(v) load_gs_index(v)
+#define loadsegment_fs(v) loadsegment(fs, v)
+#define loadsegment_ds(v) loadsegment(ds, v)
+#define loadsegment_es(v) loadsegment(es, v)
+
+#define get_user_seg(seg) ({ unsigned int v; savesegment(seg, v); v; })
+#define set_user_seg(seg, v) loadsegment_##seg(v)
+
+#define COPY(x) { \
+ get_user_ex(regs->x, &sc->x); \
+}
+
+#define GET_SEG(seg) ({ \
+ unsigned short tmp; \
+ get_user_ex(tmp, &sc->seg); \
+ tmp; \
+})
+
+#define COPY_SEG_CPL3(seg) do { \
+ regs->seg = GET_SEG(seg) | 3; \
+} while (0)
+
+#define RELOAD_SEG(seg) { \
+ unsigned int pre = GET_SEG(seg); \
+ unsigned int cur = get_user_seg(seg); \
+ pre |= 3; \
+ if (pre != cur) \
+ set_user_seg(seg, pre); \
+}
+
+static int ia32_restore_sigcontext(struct pt_regs *regs,
+ struct sigcontext_ia32 __user *sc,
+ unsigned int *pax)
+{
+ unsigned int tmpflags, err = 0;
+ void __user *buf;
+ u32 tmp;
+
+ /* Always make any pending restarted system calls return -EINTR */
+ current_thread_info()->restart_block.fn = do_no_restart_syscall;
+
+ get_user_try {
+ /*
+ * Reload fs and gs if they have changed in the signal
+ * handler. This does not handle long fs/gs base changes in
+ * the handler, but does not clobber them at least in the
+ * normal case.
+ */
+ RELOAD_SEG(gs);
+ RELOAD_SEG(fs);
+ RELOAD_SEG(ds);
+ RELOAD_SEG(es);
+
+ COPY(di); COPY(si); COPY(bp); COPY(sp); COPY(bx);
+ COPY(dx); COPY(cx); COPY(ip);
+ /* Don't touch extended registers */
+
+ COPY_SEG_CPL3(cs);
+ COPY_SEG_CPL3(ss);
+
+ get_user_ex(tmpflags, &sc->flags);
+ regs->flags = (regs->flags & ~FIX_EFLAGS) | (tmpflags & FIX_EFLAGS);
+ /* disable syscall checks */
+ regs->orig_ax = -1;
+
+ get_user_ex(tmp, &sc->fpstate);
+ buf = compat_ptr(tmp);
+ err |= restore_i387_xstate_ia32(buf);
+
+ get_user_ex(*pax, &sc->ax);
+ } get_user_catch(err);
+
+ return err;
+}
+
+asmlinkage long sys32_sigreturn(struct pt_regs *regs)
+{
+ struct sigframe_ia32 __user *frame = (struct sigframe_ia32 __user *)(regs->sp-8);
+ sigset_t set;
+ unsigned int ax;
+
+ if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
+ goto badframe;
+ if (__get_user(set.sig[0], &frame->sc.oldmask)
+ || (_COMPAT_NSIG_WORDS > 1
+ && __copy_from_user((((char *) &set.sig) + 4),
+ &frame->extramask,
+ sizeof(frame->extramask))))
+ goto badframe;
+
+ sigdelsetmask(&set, ~_BLOCKABLE);
+ set_current_blocked(&set);
+
+ if (ia32_restore_sigcontext(regs, &frame->sc, &ax))
+ goto badframe;
+ return ax;
+
+badframe:
+ signal_fault(regs, frame, "32bit sigreturn");
+ return 0;
+}
+
+asmlinkage long sys32_rt_sigreturn(struct pt_regs *regs)
+{
+ struct rt_sigframe_ia32 __user *frame;
+ sigset_t set;
+ unsigned int ax;
+ struct pt_regs tregs;
+
+ frame = (struct rt_sigframe_ia32 __user *)(regs->sp - 4);
+
+ if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
+ goto badframe;
+ if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
+ goto badframe;
+
+ sigdelsetmask(&set, ~_BLOCKABLE);
+ set_current_blocked(&set);
+
+ if (ia32_restore_sigcontext(regs, &frame->uc.uc_mcontext, &ax))
+ goto badframe;
+
+ tregs = *regs;
+ if (sys32_sigaltstack(&frame->uc.uc_stack, NULL, &tregs) == -EFAULT)
+ goto badframe;
+
+ return ax;
+
+badframe:
+ signal_fault(regs, frame, "32bit rt sigreturn");
+ return 0;
+}
+
+/*
+ * Set up a signal frame.
+ */
+
+static int ia32_setup_sigcontext(struct sigcontext_ia32 __user *sc,
+ void __user *fpstate,
+ struct pt_regs *regs, unsigned int mask)
+{
+ int err = 0;
+
+ put_user_try {
+ put_user_ex(get_user_seg(gs), (unsigned int __user *)&sc->gs);
+ put_user_ex(get_user_seg(fs), (unsigned int __user *)&sc->fs);
+ put_user_ex(get_user_seg(ds), (unsigned int __user *)&sc->ds);
+ put_user_ex(get_user_seg(es), (unsigned int __user *)&sc->es);
+
+ put_user_ex(regs->di, &sc->di);
+ put_user_ex(regs->si, &sc->si);
+ put_user_ex(regs->bp, &sc->bp);
+ put_user_ex(regs->sp, &sc->sp);
+ put_user_ex(regs->bx, &sc->bx);
+ put_user_ex(regs->dx, &sc->dx);
+ put_user_ex(regs->cx, &sc->cx);
+ put_user_ex(regs->ax, &sc->ax);
+ put_user_ex(current->thread.trap_nr, &sc->trapno);
+ put_user_ex(current->thread.error_code, &sc->err);
+ put_user_ex(regs->ip, &sc->ip);
+ put_user_ex(regs->cs, (unsigned int __user *)&sc->cs);
+ put_user_ex(regs->flags, &sc->flags);
+ put_user_ex(regs->sp, &sc->sp_at_signal);
+ put_user_ex(regs->ss, (unsigned int __user *)&sc->ss);
+
+ put_user_ex(ptr_to_compat(fpstate), &sc->fpstate);
+
+ /* non-iBCS2 extensions.. */
+ put_user_ex(mask, &sc->oldmask);
+ put_user_ex(current->thread.cr2, &sc->cr2);
+ } put_user_catch(err);
+
+ return err;
+}
+
+/*
+ * Determine which stack to use..
+ */
+static void __user *get_sigframe(struct k_sigaction *ka, struct pt_regs *regs,
+ size_t frame_size,
+ void **fpstate)
+{
+ unsigned long sp;
+
+ /* Default to using normal stack */
+ sp = regs->sp;
+
+ /* This is the X/Open sanctioned signal stack switching. */
+ if (ka->sa.sa_flags & SA_ONSTACK) {
+ if (sas_ss_flags(sp) == 0)
+ sp = current->sas_ss_sp + current->sas_ss_size;
+ }
+
+ /* This is the legacy signal stack switching. */
+ else if ((regs->ss & 0xffff) != __USER32_DS &&
+ !(ka->sa.sa_flags & SA_RESTORER) &&
+ ka->sa.sa_restorer)
+ sp = (unsigned long) ka->sa.sa_restorer;
+
+ if (used_math()) {
+ sp = sp - sig_xstate_ia32_size;
+ *fpstate = (struct _fpstate_ia32 *) sp;
+ if (save_i387_xstate_ia32(*fpstate) < 0)
+ return (void __user *) -1L;
+ }
+
+ sp -= frame_size;
+ /* Align the stack pointer according to the i386 ABI,
+ * i.e. so that on function entry ((sp + 4) & 15) == 0. */
+ sp = ((sp + 4) & -16ul) - 4;
+ return (void __user *) sp;
+}
+
+int ia32_setup_frame(int sig, struct k_sigaction *ka,
+ compat_sigset_t *set, struct pt_regs *regs)
+{
+ struct sigframe_ia32 __user *frame;
+ void __user *restorer;
+ int err = 0;
+ void __user *fpstate = NULL;
+
+ /* copy_to_user optimizes that into a single 8 byte store */
+ static const struct {
+ u16 poplmovl;
+ u32 val;
+ u16 int80;
+ } __attribute__((packed)) code = {
+ 0xb858, /* popl %eax ; movl $...,%eax */
+ __NR_ia32_sigreturn,
+ 0x80cd, /* int $0x80 */
+ };
+
+ frame = get_sigframe(ka, regs, sizeof(*frame), &fpstate);
+
+ if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
+ return -EFAULT;
+
+ if (__put_user(sig, &frame->sig))
+ return -EFAULT;
+
+ if (ia32_setup_sigcontext(&frame->sc, fpstate, regs, set->sig[0]))
+ return -EFAULT;
+
+ if (_COMPAT_NSIG_WORDS > 1) {
+ if (__copy_to_user(frame->extramask, &set->sig[1],
+ sizeof(frame->extramask)))
+ return -EFAULT;
+ }
+
+ if (ka->sa.sa_flags & SA_RESTORER) {
+ restorer = ka->sa.sa_restorer;
+ } else {
+ /* Return stub is in 32bit vsyscall page */
+ if (current->mm->context.vdso)
+ restorer = VDSO32_SYMBOL(current->mm->context.vdso,
+ sigreturn);
+ else
+ restorer = &frame->retcode;
+ }
+
+ put_user_try {
+ put_user_ex(ptr_to_compat(restorer), &frame->pretcode);
+
+ /*
+ * These are actually not used anymore, but left because some
+ * gdb versions depend on them as a marker.
+ */
+ put_user_ex(*((u64 *)&code), (u64 *)frame->retcode);
+ } put_user_catch(err);
+
+ if (err)
+ return -EFAULT;
+
+ /* Set up registers for signal handler */
+ regs->sp = (unsigned long) frame;
+ regs->ip = (unsigned long) ka->sa.sa_handler;
+
+ /* Make -mregparm=3 work */
+ regs->ax = sig;
+ regs->dx = 0;
+ regs->cx = 0;
+
+ loadsegment(ds, __USER32_DS);
+ loadsegment(es, __USER32_DS);
+
+ regs->cs = __USER32_CS;
+ regs->ss = __USER32_DS;
+
+ return 0;
+}
+
+int ia32_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
+ compat_sigset_t *set, struct pt_regs *regs)
+{
+ struct rt_sigframe_ia32 __user *frame;
+ void __user *restorer;
+ int err = 0;
+ void __user *fpstate = NULL;
+
+ /* __copy_to_user optimizes that into a single 8 byte store */
+ static const struct {
+ u8 movl;
+ u32 val;
+ u16 int80;
+ u8 pad;
+ } __attribute__((packed)) code = {
+ 0xb8,
+ __NR_ia32_rt_sigreturn,
+ 0x80cd,
+ 0,
+ };
+
+ frame = get_sigframe(ka, regs, sizeof(*frame), &fpstate);
+
+ if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
+ return -EFAULT;
+
+ put_user_try {
+ put_user_ex(sig, &frame->sig);
+ put_user_ex(ptr_to_compat(&frame->info), &frame->pinfo);
+ put_user_ex(ptr_to_compat(&frame->uc), &frame->puc);
+ err |= copy_siginfo_to_user32(&frame->info, info);
+
+ /* Create the ucontext. */
+ if (cpu_has_xsave)
+ put_user_ex(UC_FP_XSTATE, &frame->uc.uc_flags);
+ else
+ put_user_ex(0, &frame->uc.uc_flags);
+ put_user_ex(0, &frame->uc.uc_link);
+ put_user_ex(current->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
+ put_user_ex(sas_ss_flags(regs->sp),
+ &frame->uc.uc_stack.ss_flags);
+ put_user_ex(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
+ err |= ia32_setup_sigcontext(&frame->uc.uc_mcontext, fpstate,
+ regs, set->sig[0]);
+ err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
+
+ if (ka->sa.sa_flags & SA_RESTORER)
+ restorer = ka->sa.sa_restorer;
+ else
+ restorer = VDSO32_SYMBOL(current->mm->context.vdso,
+ rt_sigreturn);
+ put_user_ex(ptr_to_compat(restorer), &frame->pretcode);
+
+ /*
+ * Not actually used anymore, but left because some gdb
+ * versions need it.
+ */
+ put_user_ex(*((u64 *)&code), (u64 *)frame->retcode);
+ } put_user_catch(err);
+
+ if (err)
+ return -EFAULT;
+
+ /* Set up registers for signal handler */
+ regs->sp = (unsigned long) frame;
+ regs->ip = (unsigned long) ka->sa.sa_handler;
+
+ /* Make -mregparm=3 work */
+ regs->ax = sig;
+ regs->dx = (unsigned long) &frame->info;
+ regs->cx = (unsigned long) &frame->uc;
+
+ loadsegment(ds, __USER32_DS);
+ loadsegment(es, __USER32_DS);
+
+ regs->cs = __USER32_CS;
+ regs->ss = __USER32_DS;
+
+ return 0;
+}
diff --git a/arch/x86/ia32/ia32entry.S b/arch/x86/ia32/ia32entry.S
new file mode 100644
index 00000000..e3e73400
--- /dev/null
+++ b/arch/x86/ia32/ia32entry.S
@@ -0,0 +1,493 @@
+/*
+ * Compatibility mode system call entry point for x86-64.
+ *
+ * Copyright 2000-2002 Andi Kleen, SuSE Labs.
+ */
+
+#include <asm/dwarf2.h>
+#include <asm/calling.h>
+#include <asm/asm-offsets.h>
+#include <asm/current.h>
+#include <asm/errno.h>
+#include <asm/ia32_unistd.h>
+#include <asm/thread_info.h>
+#include <asm/segment.h>
+#include <asm/irqflags.h>
+#include <linux/linkage.h>
+#include <linux/err.h>
+
+/* Avoid __ASSEMBLER__'ifying <linux/audit.h> just for this. */
+#include <linux/elf-em.h>
+#define AUDIT_ARCH_I386 (EM_386|__AUDIT_ARCH_LE)
+#define __AUDIT_ARCH_LE 0x40000000
+
+#ifndef CONFIG_AUDITSYSCALL
+#define sysexit_audit ia32_ret_from_sys_call
+#define sysretl_audit ia32_ret_from_sys_call
+#endif
+
+ .section .entry.text, "ax"
+
+ .macro IA32_ARG_FIXUP noebp=0
+ movl %edi,%r8d
+ .if \noebp
+ .else
+ movl %ebp,%r9d
+ .endif
+ xchg %ecx,%esi
+ movl %ebx,%edi
+ movl %edx,%edx /* zero extension */
+ .endm
+
+ /* clobbers %eax */
+ .macro CLEAR_RREGS offset=0, _r9=rax
+ xorl %eax,%eax
+ movq %rax,\offset+R11(%rsp)
+ movq %rax,\offset+R10(%rsp)
+ movq %\_r9,\offset+R9(%rsp)
+ movq %rax,\offset+R8(%rsp)
+ .endm
+
+ /*
+ * Reload arg registers from stack in case ptrace changed them.
+ * We don't reload %eax because syscall_trace_enter() returned
+ * the %rax value we should see. Instead, we just truncate that
+ * value to 32 bits again as we did on entry from user mode.
+ * If it's a new value set by user_regset during entry tracing,
+ * this matches the normal truncation of the user-mode value.
+ * If it's -1 to make us punt the syscall, then (u32)-1 is still
+ * an appropriately invalid value.
+ */
+ .macro LOAD_ARGS32 offset, _r9=0
+ .if \_r9
+ movl \offset+16(%rsp),%r9d
+ .endif
+ movl \offset+40(%rsp),%ecx
+ movl \offset+48(%rsp),%edx
+ movl \offset+56(%rsp),%esi
+ movl \offset+64(%rsp),%edi
+ movl %eax,%eax /* zero extension */
+ .endm
+
+ .macro CFI_STARTPROC32 simple
+ CFI_STARTPROC \simple
+ CFI_UNDEFINED r8
+ CFI_UNDEFINED r9
+ CFI_UNDEFINED r10
+ CFI_UNDEFINED r11
+ CFI_UNDEFINED r12
+ CFI_UNDEFINED r13
+ CFI_UNDEFINED r14
+ CFI_UNDEFINED r15
+ .endm
+
+#ifdef CONFIG_PARAVIRT
+ENTRY(native_usergs_sysret32)
+ swapgs
+ sysretl
+ENDPROC(native_usergs_sysret32)
+
+ENTRY(native_irq_enable_sysexit)
+ swapgs
+ sti
+ sysexit
+ENDPROC(native_irq_enable_sysexit)
+#endif
+
+/*
+ * 32bit SYSENTER instruction entry.
+ *
+ * Arguments:
+ * %eax System call number.
+ * %ebx Arg1
+ * %ecx Arg2
+ * %edx Arg3
+ * %esi Arg4
+ * %edi Arg5
+ * %ebp user stack
+ * 0(%ebp) Arg6
+ *
+ * Interrupts off.
+ *
+ * This is purely a fast path. For anything complicated we use the int 0x80
+ * path below. Set up a complete hardware stack frame to share code
+ * with the int 0x80 path.
+ */
+ENTRY(ia32_sysenter_target)
+ CFI_STARTPROC32 simple
+ CFI_SIGNAL_FRAME
+ CFI_DEF_CFA rsp,0
+ CFI_REGISTER rsp,rbp
+ SWAPGS_UNSAFE_STACK
+ movq PER_CPU_VAR(kernel_stack), %rsp
+ addq $(KERNEL_STACK_OFFSET),%rsp
+ /*
+ * No need to follow this irqs on/off section: the syscall
+ * disabled irqs, here we enable it straight after entry:
+ */
+ ENABLE_INTERRUPTS(CLBR_NONE)
+ movl %ebp,%ebp /* zero extension */
+ pushq_cfi $__USER32_DS
+ /*CFI_REL_OFFSET ss,0*/
+ pushq_cfi %rbp
+ CFI_REL_OFFSET rsp,0
+ pushfq_cfi
+ /*CFI_REL_OFFSET rflags,0*/
+ movl TI_sysenter_return+THREAD_INFO(%rsp,3*8-KERNEL_STACK_OFFSET),%r10d
+ CFI_REGISTER rip,r10
+ pushq_cfi $__USER32_CS
+ /*CFI_REL_OFFSET cs,0*/
+ movl %eax, %eax
+ pushq_cfi %r10
+ CFI_REL_OFFSET rip,0
+ pushq_cfi %rax
+ cld
+ SAVE_ARGS 0,1,0
+ /* no need to do an access_ok check here because rbp has been
+ 32bit zero extended */
+1: movl (%rbp),%ebp
+ .section __ex_table,"a"
+ .quad 1b,ia32_badarg
+ .previous
+ orl $TS_COMPAT,TI_status+THREAD_INFO(%rsp,RIP-ARGOFFSET)
+ testl $_TIF_WORK_SYSCALL_ENTRY,TI_flags+THREAD_INFO(%rsp,RIP-ARGOFFSET)
+ CFI_REMEMBER_STATE
+ jnz sysenter_tracesys
+ cmpq $(IA32_NR_syscalls-1),%rax
+ ja ia32_badsys
+sysenter_do_call:
+ IA32_ARG_FIXUP
+sysenter_dispatch:
+ call *ia32_sys_call_table(,%rax,8)
+ movq %rax,RAX-ARGOFFSET(%rsp)
+ DISABLE_INTERRUPTS(CLBR_NONE)
+ TRACE_IRQS_OFF
+ testl $_TIF_ALLWORK_MASK,TI_flags+THREAD_INFO(%rsp,RIP-ARGOFFSET)
+ jnz sysexit_audit
+sysexit_from_sys_call:
+ andl $~TS_COMPAT,TI_status+THREAD_INFO(%rsp,RIP-ARGOFFSET)
+ /* clear IF, that popfq doesn't enable interrupts early */
+ andl $~0x200,EFLAGS-R11(%rsp)
+ movl RIP-R11(%rsp),%edx /* User %eip */
+ CFI_REGISTER rip,rdx
+ RESTORE_ARGS 0,24,0,0,0,0
+ xorq %r8,%r8
+ xorq %r9,%r9
+ xorq %r10,%r10
+ xorq %r11,%r11
+ popfq_cfi
+ /*CFI_RESTORE rflags*/
+ popq_cfi %rcx /* User %esp */
+ CFI_REGISTER rsp,rcx
+ TRACE_IRQS_ON
+ ENABLE_INTERRUPTS_SYSEXIT32
+
+#ifdef CONFIG_AUDITSYSCALL
+ .macro auditsys_entry_common
+ movl %esi,%r9d /* 6th arg: 4th syscall arg */
+ movl %edx,%r8d /* 5th arg: 3rd syscall arg */
+ /* (already in %ecx) 4th arg: 2nd syscall arg */
+ movl %ebx,%edx /* 3rd arg: 1st syscall arg */
+ movl %eax,%esi /* 2nd arg: syscall number */
+ movl $AUDIT_ARCH_I386,%edi /* 1st arg: audit arch */
+ call __audit_syscall_entry
+ movl RAX-ARGOFFSET(%rsp),%eax /* reload syscall number */
+ cmpq $(IA32_NR_syscalls-1),%rax
+ ja ia32_badsys
+ movl %ebx,%edi /* reload 1st syscall arg */
+ movl RCX-ARGOFFSET(%rsp),%esi /* reload 2nd syscall arg */
+ movl RDX-ARGOFFSET(%rsp),%edx /* reload 3rd syscall arg */
+ movl RSI-ARGOFFSET(%rsp),%ecx /* reload 4th syscall arg */
+ movl RDI-ARGOFFSET(%rsp),%r8d /* reload 5th syscall arg */
+ .endm
+
+ .macro auditsys_exit exit
+ testl $(_TIF_ALLWORK_MASK & ~_TIF_SYSCALL_AUDIT),TI_flags+THREAD_INFO(%rsp,RIP-ARGOFFSET)
+ jnz ia32_ret_from_sys_call
+ TRACE_IRQS_ON
+ sti
+ movl %eax,%esi /* second arg, syscall return value */
+ cmpl $-MAX_ERRNO,%eax /* is it an error ? */
+ jbe 1f
+ movslq %eax, %rsi /* if error sign extend to 64 bits */
+1: setbe %al /* 1 if error, 0 if not */
+ movzbl %al,%edi /* zero-extend that into %edi */
+ call __audit_syscall_exit
+ movq RAX-ARGOFFSET(%rsp),%rax /* reload syscall return value */
+ movl $(_TIF_ALLWORK_MASK & ~_TIF_SYSCALL_AUDIT),%edi
+ cli
+ TRACE_IRQS_OFF
+ testl %edi,TI_flags+THREAD_INFO(%rsp,RIP-ARGOFFSET)
+ jz \exit
+ CLEAR_RREGS -ARGOFFSET
+ jmp int_with_check
+ .endm
+
+sysenter_auditsys:
+ CFI_RESTORE_STATE
+ auditsys_entry_common
+ movl %ebp,%r9d /* reload 6th syscall arg */
+ jmp sysenter_dispatch
+
+sysexit_audit:
+ auditsys_exit sysexit_from_sys_call
+#endif
+
+sysenter_tracesys:
+#ifdef CONFIG_AUDITSYSCALL
+ testl $(_TIF_WORK_SYSCALL_ENTRY & ~_TIF_SYSCALL_AUDIT),TI_flags+THREAD_INFO(%rsp,RIP-ARGOFFSET)
+ jz sysenter_auditsys
+#endif
+ SAVE_REST
+ CLEAR_RREGS
+ movq $-ENOSYS,RAX(%rsp)/* ptrace can change this for a bad syscall */
+ movq %rsp,%rdi /* &pt_regs -> arg1 */
+ call syscall_trace_enter
+ LOAD_ARGS32 ARGOFFSET /* reload args from stack in case ptrace changed it */
+ RESTORE_REST
+ cmpq $(IA32_NR_syscalls-1),%rax
+ ja int_ret_from_sys_call /* sysenter_tracesys has set RAX(%rsp) */
+ jmp sysenter_do_call
+ CFI_ENDPROC
+ENDPROC(ia32_sysenter_target)
+
+/*
+ * 32bit SYSCALL instruction entry.
+ *
+ * Arguments:
+ * %eax System call number.
+ * %ebx Arg1
+ * %ecx return EIP
+ * %edx Arg3
+ * %esi Arg4
+ * %edi Arg5
+ * %ebp Arg2 [note: not saved in the stack frame, should not be touched]
+ * %esp user stack
+ * 0(%esp) Arg6
+ *
+ * Interrupts off.
+ *
+ * This is purely a fast path. For anything complicated we use the int 0x80
+ * path below. Set up a complete hardware stack frame to share code
+ * with the int 0x80 path.
+ */
+ENTRY(ia32_cstar_target)
+ CFI_STARTPROC32 simple
+ CFI_SIGNAL_FRAME
+ CFI_DEF_CFA rsp,KERNEL_STACK_OFFSET
+ CFI_REGISTER rip,rcx
+ /*CFI_REGISTER rflags,r11*/
+ SWAPGS_UNSAFE_STACK
+ movl %esp,%r8d
+ CFI_REGISTER rsp,r8
+ movq PER_CPU_VAR(kernel_stack),%rsp
+ /*
+ * No need to follow this irqs on/off section: the syscall
+ * disabled irqs and here we enable it straight after entry:
+ */
+ ENABLE_INTERRUPTS(CLBR_NONE)
+ SAVE_ARGS 8,0,0
+ movl %eax,%eax /* zero extension */
+ movq %rax,ORIG_RAX-ARGOFFSET(%rsp)
+ movq %rcx,RIP-ARGOFFSET(%rsp)
+ CFI_REL_OFFSET rip,RIP-ARGOFFSET
+ movq %rbp,RCX-ARGOFFSET(%rsp) /* this lies slightly to ptrace */
+ movl %ebp,%ecx
+ movq $__USER32_CS,CS-ARGOFFSET(%rsp)
+ movq $__USER32_DS,SS-ARGOFFSET(%rsp)
+ movq %r11,EFLAGS-ARGOFFSET(%rsp)
+ /*CFI_REL_OFFSET rflags,EFLAGS-ARGOFFSET*/
+ movq %r8,RSP-ARGOFFSET(%rsp)
+ CFI_REL_OFFSET rsp,RSP-ARGOFFSET
+ /* no need to do an access_ok check here because r8 has been
+ 32bit zero extended */
+ /* hardware stack frame is complete now */
+1: movl (%r8),%r9d
+ .section __ex_table,"a"
+ .quad 1b,ia32_badarg
+ .previous
+ orl $TS_COMPAT,TI_status+THREAD_INFO(%rsp,RIP-ARGOFFSET)
+ testl $_TIF_WORK_SYSCALL_ENTRY,TI_flags+THREAD_INFO(%rsp,RIP-ARGOFFSET)
+ CFI_REMEMBER_STATE
+ jnz cstar_tracesys
+ cmpq $IA32_NR_syscalls-1,%rax
+ ja ia32_badsys
+cstar_do_call:
+ IA32_ARG_FIXUP 1
+cstar_dispatch:
+ call *ia32_sys_call_table(,%rax,8)
+ movq %rax,RAX-ARGOFFSET(%rsp)
+ DISABLE_INTERRUPTS(CLBR_NONE)
+ TRACE_IRQS_OFF
+ testl $_TIF_ALLWORK_MASK,TI_flags+THREAD_INFO(%rsp,RIP-ARGOFFSET)
+ jnz sysretl_audit
+sysretl_from_sys_call:
+ andl $~TS_COMPAT,TI_status+THREAD_INFO(%rsp,RIP-ARGOFFSET)
+ RESTORE_ARGS 0,-ARG_SKIP,0,0,0
+ movl RIP-ARGOFFSET(%rsp),%ecx
+ CFI_REGISTER rip,rcx
+ movl EFLAGS-ARGOFFSET(%rsp),%r11d
+ /*CFI_REGISTER rflags,r11*/
+ xorq %r10,%r10
+ xorq %r9,%r9
+ xorq %r8,%r8
+ TRACE_IRQS_ON
+ movl RSP-ARGOFFSET(%rsp),%esp
+ CFI_RESTORE rsp
+ USERGS_SYSRET32
+
+#ifdef CONFIG_AUDITSYSCALL
+cstar_auditsys:
+ CFI_RESTORE_STATE
+ movl %r9d,R9-ARGOFFSET(%rsp) /* register to be clobbered by call */
+ auditsys_entry_common
+ movl R9-ARGOFFSET(%rsp),%r9d /* reload 6th syscall arg */
+ jmp cstar_dispatch
+
+sysretl_audit:
+ auditsys_exit sysretl_from_sys_call
+#endif
+
+cstar_tracesys:
+#ifdef CONFIG_AUDITSYSCALL
+ testl $(_TIF_WORK_SYSCALL_ENTRY & ~_TIF_SYSCALL_AUDIT),TI_flags+THREAD_INFO(%rsp,RIP-ARGOFFSET)
+ jz cstar_auditsys
+#endif
+ xchgl %r9d,%ebp
+ SAVE_REST
+ CLEAR_RREGS 0, r9
+ movq $-ENOSYS,RAX(%rsp) /* ptrace can change this for a bad syscall */
+ movq %rsp,%rdi /* &pt_regs -> arg1 */
+ call syscall_trace_enter
+ LOAD_ARGS32 ARGOFFSET, 1 /* reload args from stack in case ptrace changed it */
+ RESTORE_REST
+ xchgl %ebp,%r9d
+ cmpq $(IA32_NR_syscalls-1),%rax
+ ja int_ret_from_sys_call /* cstar_tracesys has set RAX(%rsp) */
+ jmp cstar_do_call
+END(ia32_cstar_target)
+
+ia32_badarg:
+ movq $-EFAULT,%rax
+ jmp ia32_sysret
+ CFI_ENDPROC
+
+/*
+ * Emulated IA32 system calls via int 0x80.
+ *
+ * Arguments:
+ * %eax System call number.
+ * %ebx Arg1
+ * %ecx Arg2
+ * %edx Arg3
+ * %esi Arg4
+ * %edi Arg5
+ * %ebp Arg6 [note: not saved in the stack frame, should not be touched]
+ *
+ * Notes:
+ * Uses the same stack frame as the x86-64 version.
+ * All registers except %eax must be saved (but ptrace may violate that)
+ * Arguments are zero extended. For system calls that want sign extension and
+ * take long arguments a wrapper is needed. Most calls can just be called
+ * directly.
+ * Assumes it is only called from user space and entered with interrupts off.
+ */
+
+ENTRY(ia32_syscall)
+ CFI_STARTPROC32 simple
+ CFI_SIGNAL_FRAME
+ CFI_DEF_CFA rsp,SS+8-RIP
+ /*CFI_REL_OFFSET ss,SS-RIP*/
+ CFI_REL_OFFSET rsp,RSP-RIP
+ /*CFI_REL_OFFSET rflags,EFLAGS-RIP*/
+ /*CFI_REL_OFFSET cs,CS-RIP*/
+ CFI_REL_OFFSET rip,RIP-RIP
+ PARAVIRT_ADJUST_EXCEPTION_FRAME
+ SWAPGS
+ /*
+ * No need to follow this irqs on/off section: the syscall
+ * disabled irqs and here we enable it straight after entry:
+ */
+ ENABLE_INTERRUPTS(CLBR_NONE)
+ movl %eax,%eax
+ pushq_cfi %rax
+ cld
+ /* note the registers are not zero extended to the sf.
+ this could be a problem. */
+ SAVE_ARGS 0,1,0
+ orl $TS_COMPAT,TI_status+THREAD_INFO(%rsp,RIP-ARGOFFSET)
+ testl $_TIF_WORK_SYSCALL_ENTRY,TI_flags+THREAD_INFO(%rsp,RIP-ARGOFFSET)
+ jnz ia32_tracesys
+ cmpq $(IA32_NR_syscalls-1),%rax
+ ja ia32_badsys
+ia32_do_call:
+ IA32_ARG_FIXUP
+ call *ia32_sys_call_table(,%rax,8) # xxx: rip relative
+ia32_sysret:
+ movq %rax,RAX-ARGOFFSET(%rsp)
+ia32_ret_from_sys_call:
+ CLEAR_RREGS -ARGOFFSET
+ jmp int_ret_from_sys_call
+
+ia32_tracesys:
+ SAVE_REST
+ CLEAR_RREGS
+ movq $-ENOSYS,RAX(%rsp) /* ptrace can change this for a bad syscall */
+ movq %rsp,%rdi /* &pt_regs -> arg1 */
+ call syscall_trace_enter
+ LOAD_ARGS32 ARGOFFSET /* reload args from stack in case ptrace changed it */
+ RESTORE_REST
+ cmpq $(IA32_NR_syscalls-1),%rax
+ ja int_ret_from_sys_call /* ia32_tracesys has set RAX(%rsp) */
+ jmp ia32_do_call
+END(ia32_syscall)
+
+ia32_badsys:
+ movq $0,ORIG_RAX-ARGOFFSET(%rsp)
+ movq $-ENOSYS,%rax
+ jmp ia32_sysret
+
+ CFI_ENDPROC
+
+ .macro PTREGSCALL label, func, arg
+ ALIGN
+GLOBAL(\label)
+ leaq \func(%rip),%rax
+ leaq -ARGOFFSET+8(%rsp),\arg /* 8 for return address */
+ jmp ia32_ptregs_common
+ .endm
+
+ CFI_STARTPROC32
+
+ PTREGSCALL stub32_rt_sigreturn, sys32_rt_sigreturn, %rdi
+ PTREGSCALL stub32_sigreturn, sys32_sigreturn, %rdi
+ PTREGSCALL stub32_sigaltstack, sys32_sigaltstack, %rdx
+ PTREGSCALL stub32_execve, sys32_execve, %rcx
+ PTREGSCALL stub32_fork, sys_fork, %rdi
+ PTREGSCALL stub32_clone, sys32_clone, %rdx
+ PTREGSCALL stub32_vfork, sys_vfork, %rdi
+ PTREGSCALL stub32_iopl, sys_iopl, %rsi
+
+ ALIGN
+ia32_ptregs_common:
+ popq %r11
+ CFI_ENDPROC
+ CFI_STARTPROC32 simple
+ CFI_SIGNAL_FRAME
+ CFI_DEF_CFA rsp,SS+8-ARGOFFSET
+ CFI_REL_OFFSET rax,RAX-ARGOFFSET
+ CFI_REL_OFFSET rcx,RCX-ARGOFFSET
+ CFI_REL_OFFSET rdx,RDX-ARGOFFSET
+ CFI_REL_OFFSET rsi,RSI-ARGOFFSET
+ CFI_REL_OFFSET rdi,RDI-ARGOFFSET
+ CFI_REL_OFFSET rip,RIP-ARGOFFSET
+/* CFI_REL_OFFSET cs,CS-ARGOFFSET*/
+/* CFI_REL_OFFSET rflags,EFLAGS-ARGOFFSET*/
+ CFI_REL_OFFSET rsp,RSP-ARGOFFSET
+/* CFI_REL_OFFSET ss,SS-ARGOFFSET*/
+ SAVE_REST
+ call *%rax
+ RESTORE_REST
+ jmp ia32_sysret /* misbalances the return cache */
+ CFI_ENDPROC
+END(ia32_ptregs_common)
diff --git a/arch/x86/ia32/ipc32.c b/arch/x86/ia32/ipc32.c
new file mode 100644
index 00000000..29cdcd02
--- /dev/null
+++ b/arch/x86/ia32/ipc32.c
@@ -0,0 +1,54 @@
+#include <linux/kernel.h>
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <linux/syscalls.h>
+#include <linux/time.h>
+#include <linux/sem.h>
+#include <linux/msg.h>
+#include <linux/shm.h>
+#include <linux/ipc.h>
+#include <linux/compat.h>
+#include <asm/sys_ia32.h>
+
+asmlinkage long sys32_ipc(u32 call, int first, int second, int third,
+ compat_uptr_t ptr, u32 fifth)
+{
+ int version;
+
+ version = call >> 16; /* hack for backward compatibility */
+ call &= 0xffff;
+
+ switch (call) {
+ case SEMOP:
+ /* struct sembuf is the same on 32 and 64bit :)) */
+ return sys_semtimedop(first, compat_ptr(ptr), second, NULL);
+ case SEMTIMEDOP:
+ return compat_sys_semtimedop(first, compat_ptr(ptr), second,
+ compat_ptr(fifth));
+ case SEMGET:
+ return sys_semget(first, second, third);
+ case SEMCTL:
+ return compat_sys_semctl(first, second, third, compat_ptr(ptr));
+
+ case MSGSND:
+ return compat_sys_msgsnd(first, second, third, compat_ptr(ptr));
+ case MSGRCV:
+ return compat_sys_msgrcv(first, second, fifth, third,
+ version, compat_ptr(ptr));
+ case MSGGET:
+ return sys_msgget((key_t) first, second);
+ case MSGCTL:
+ return compat_sys_msgctl(first, second, compat_ptr(ptr));
+
+ case SHMAT:
+ return compat_sys_shmat(first, second, third, version,
+ compat_ptr(ptr));
+ case SHMDT:
+ return sys_shmdt(compat_ptr(ptr));
+ case SHMGET:
+ return sys_shmget(first, (unsigned)second, third);
+ case SHMCTL:
+ return compat_sys_shmctl(first, second, compat_ptr(ptr));
+ }
+ return -ENOSYS;
+}
diff --git a/arch/x86/ia32/nosyscall.c b/arch/x86/ia32/nosyscall.c
new file mode 100644
index 00000000..51ecd5b4
--- /dev/null
+++ b/arch/x86/ia32/nosyscall.c
@@ -0,0 +1,7 @@
+#include <linux/kernel.h>
+#include <linux/errno.h>
+
+long compat_ni_syscall(void)
+{
+ return -ENOSYS;
+}
diff --git a/arch/x86/ia32/sys_ia32.c b/arch/x86/ia32/sys_ia32.c
new file mode 100644
index 00000000..aec2202a
--- /dev/null
+++ b/arch/x86/ia32/sys_ia32.c
@@ -0,0 +1,516 @@
+/*
+ * sys_ia32.c: Conversion between 32bit and 64bit native syscalls. Based on
+ * sys_sparc32
+ *
+ * Copyright (C) 2000 VA Linux Co
+ * Copyright (C) 2000 Don Dugger <n0ano@valinux.com>
+ * Copyright (C) 1999 Arun Sharma <arun.sharma@intel.com>
+ * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
+ * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
+ * Copyright (C) 2000 Hewlett-Packard Co.
+ * Copyright (C) 2000 David Mosberger-Tang <davidm@hpl.hp.com>
+ * Copyright (C) 2000,2001,2002 Andi Kleen, SuSE Labs (x86-64 port)
+ *
+ * These routines maintain argument size conversion between 32bit and 64bit
+ * environment. In 2.5 most of this should be moved to a generic directory.
+ *
+ * This file assumes that there is a hole at the end of user address space.
+ *
+ * Some of the functions are LE specific currently. These are
+ * hopefully all marked. This should be fixed.
+ */
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/fs.h>
+#include <linux/file.h>
+#include <linux/signal.h>
+#include <linux/syscalls.h>
+#include <linux/times.h>
+#include <linux/utsname.h>
+#include <linux/mm.h>
+#include <linux/uio.h>
+#include <linux/poll.h>
+#include <linux/personality.h>
+#include <linux/stat.h>
+#include <linux/rwsem.h>
+#include <linux/compat.h>
+#include <linux/vfs.h>
+#include <linux/ptrace.h>
+#include <linux/highuid.h>
+#include <linux/sysctl.h>
+#include <linux/slab.h>
+#include <asm/mman.h>
+#include <asm/types.h>
+#include <asm/uaccess.h>
+#include <linux/atomic.h>
+#include <asm/vgtod.h>
+#include <asm/sys_ia32.h>
+
+#define AA(__x) ((unsigned long)(__x))
+
+
+asmlinkage long sys32_truncate64(const char __user *filename,
+ unsigned long offset_low,
+ unsigned long offset_high)
+{
+ return sys_truncate(filename, ((loff_t) offset_high << 32) | offset_low);
+}
+
+asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long offset_low,
+ unsigned long offset_high)
+{
+ return sys_ftruncate(fd, ((loff_t) offset_high << 32) | offset_low);
+}
+
+/*
+ * Another set for IA32/LFS -- x86_64 struct stat is different due to
+ * support for 64bit inode numbers.
+ */
+static int cp_stat64(struct stat64 __user *ubuf, struct kstat *stat)
+{
+ typeof(ubuf->st_uid) uid = 0;
+ typeof(ubuf->st_gid) gid = 0;
+ SET_UID(uid, stat->uid);
+ SET_GID(gid, stat->gid);
+ if (!access_ok(VERIFY_WRITE, ubuf, sizeof(struct stat64)) ||
+ __put_user(huge_encode_dev(stat->dev), &ubuf->st_dev) ||
+ __put_user(stat->ino, &ubuf->__st_ino) ||
+ __put_user(stat->ino, &ubuf->st_ino) ||
+ __put_user(stat->mode, &ubuf->st_mode) ||
+ __put_user(stat->nlink, &ubuf->st_nlink) ||
+ __put_user(uid, &ubuf->st_uid) ||
+ __put_user(gid, &ubuf->st_gid) ||
+ __put_user(huge_encode_dev(stat->rdev), &ubuf->st_rdev) ||
+ __put_user(stat->size, &ubuf->st_size) ||
+ __put_user(stat->atime.tv_sec, &ubuf->st_atime) ||
+ __put_user(stat->atime.tv_nsec, &ubuf->st_atime_nsec) ||
+ __put_user(stat->mtime.tv_sec, &ubuf->st_mtime) ||
+ __put_user(stat->mtime.tv_nsec, &ubuf->st_mtime_nsec) ||
+ __put_user(stat->ctime.tv_sec, &ubuf->st_ctime) ||
+ __put_user(stat->ctime.tv_nsec, &ubuf->st_ctime_nsec) ||
+ __put_user(stat->blksize, &ubuf->st_blksize) ||
+ __put_user(stat->blocks, &ubuf->st_blocks))
+ return -EFAULT;
+ return 0;
+}
+
+asmlinkage long sys32_stat64(const char __user *filename,
+ struct stat64 __user *statbuf)
+{
+ struct kstat stat;
+ int ret = vfs_stat(filename, &stat);
+
+ if (!ret)
+ ret = cp_stat64(statbuf, &stat);
+ return ret;
+}
+
+asmlinkage long sys32_lstat64(const char __user *filename,
+ struct stat64 __user *statbuf)
+{
+ struct kstat stat;
+ int ret = vfs_lstat(filename, &stat);
+ if (!ret)
+ ret = cp_stat64(statbuf, &stat);
+ return ret;
+}
+
+asmlinkage long sys32_fstat64(unsigned int fd, struct stat64 __user *statbuf)
+{
+ struct kstat stat;
+ int ret = vfs_fstat(fd, &stat);
+ if (!ret)
+ ret = cp_stat64(statbuf, &stat);
+ return ret;
+}
+
+asmlinkage long sys32_fstatat(unsigned int dfd, const char __user *filename,
+ struct stat64 __user *statbuf, int flag)
+{
+ struct kstat stat;
+ int error;
+
+ error = vfs_fstatat(dfd, filename, &stat, flag);
+ if (error)
+ return error;
+ return cp_stat64(statbuf, &stat);
+}
+
+/*
+ * Linux/i386 didn't use to be able to handle more than
+ * 4 system call parameters, so these system calls used a memory
+ * block for parameter passing..
+ */
+
+struct mmap_arg_struct32 {
+ unsigned int addr;
+ unsigned int len;
+ unsigned int prot;
+ unsigned int flags;
+ unsigned int fd;
+ unsigned int offset;
+};
+
+asmlinkage long sys32_mmap(struct mmap_arg_struct32 __user *arg)
+{
+ struct mmap_arg_struct32 a;
+
+ if (copy_from_user(&a, arg, sizeof(a)))
+ return -EFAULT;
+
+ if (a.offset & ~PAGE_MASK)
+ return -EINVAL;
+
+ return sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd,
+ a.offset>>PAGE_SHIFT);
+}
+
+asmlinkage long sys32_mprotect(unsigned long start, size_t len,
+ unsigned long prot)
+{
+ return sys_mprotect(start, len, prot);
+}
+
+asmlinkage long sys32_rt_sigaction(int sig, struct sigaction32 __user *act,
+ struct sigaction32 __user *oact,
+ unsigned int sigsetsize)
+{
+ struct k_sigaction new_ka, old_ka;
+ int ret;
+ compat_sigset_t set32;
+
+ /* XXX: Don't preclude handling different sized sigset_t's. */
+ if (sigsetsize != sizeof(compat_sigset_t))
+ return -EINVAL;
+
+ if (act) {
+ compat_uptr_t handler, restorer;
+
+ if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
+ __get_user(handler, &act->sa_handler) ||
+ __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
+ __get_user(restorer, &act->sa_restorer) ||
+ __copy_from_user(&set32, &act->sa_mask,
+ sizeof(compat_sigset_t)))
+ return -EFAULT;
+ new_ka.sa.sa_handler = compat_ptr(handler);
+ new_ka.sa.sa_restorer = compat_ptr(restorer);
+
+ /*
+ * FIXME: here we rely on _COMPAT_NSIG_WORS to be >=
+ * than _NSIG_WORDS << 1
+ */
+ switch (_NSIG_WORDS) {
+ case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6]
+ | (((long)set32.sig[7]) << 32);
+ case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4]
+ | (((long)set32.sig[5]) << 32);
+ case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2]
+ | (((long)set32.sig[3]) << 32);
+ case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0]
+ | (((long)set32.sig[1]) << 32);
+ }
+ }
+
+ ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
+
+ if (!ret && oact) {
+ /*
+ * FIXME: here we rely on _COMPAT_NSIG_WORS to be >=
+ * than _NSIG_WORDS << 1
+ */
+ switch (_NSIG_WORDS) {
+ case 4:
+ set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32);
+ set32.sig[6] = old_ka.sa.sa_mask.sig[3];
+ case 3:
+ set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32);
+ set32.sig[4] = old_ka.sa.sa_mask.sig[2];
+ case 2:
+ set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32);
+ set32.sig[2] = old_ka.sa.sa_mask.sig[1];
+ case 1:
+ set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32);
+ set32.sig[0] = old_ka.sa.sa_mask.sig[0];
+ }
+ if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
+ __put_user(ptr_to_compat(old_ka.sa.sa_handler),
+ &oact->sa_handler) ||
+ __put_user(ptr_to_compat(old_ka.sa.sa_restorer),
+ &oact->sa_restorer) ||
+ __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
+ __copy_to_user(&oact->sa_mask, &set32,
+ sizeof(compat_sigset_t)))
+ return -EFAULT;
+ }
+
+ return ret;
+}
+
+asmlinkage long sys32_sigaction(int sig, struct old_sigaction32 __user *act,
+ struct old_sigaction32 __user *oact)
+{
+ struct k_sigaction new_ka, old_ka;
+ int ret;
+
+ if (act) {
+ compat_old_sigset_t mask;
+ compat_uptr_t handler, restorer;
+
+ if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
+ __get_user(handler, &act->sa_handler) ||
+ __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
+ __get_user(restorer, &act->sa_restorer) ||
+ __get_user(mask, &act->sa_mask))
+ return -EFAULT;
+
+ new_ka.sa.sa_handler = compat_ptr(handler);
+ new_ka.sa.sa_restorer = compat_ptr(restorer);
+
+ siginitset(&new_ka.sa.sa_mask, mask);
+ }
+
+ ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
+
+ if (!ret && oact) {
+ if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
+ __put_user(ptr_to_compat(old_ka.sa.sa_handler),
+ &oact->sa_handler) ||
+ __put_user(ptr_to_compat(old_ka.sa.sa_restorer),
+ &oact->sa_restorer) ||
+ __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
+ __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
+ return -EFAULT;
+ }
+
+ return ret;
+}
+
+asmlinkage long sys32_alarm(unsigned int seconds)
+{
+ return alarm_setitimer(seconds);
+}
+
+asmlinkage long sys32_waitpid(compat_pid_t pid, unsigned int *stat_addr,
+ int options)
+{
+ return compat_sys_wait4(pid, stat_addr, options, NULL);
+}
+
+/* 32-bit timeval and related flotsam. */
+
+asmlinkage long sys32_sysfs(int option, u32 arg1, u32 arg2)
+{
+ return sys_sysfs(option, arg1, arg2);
+}
+
+asmlinkage long sys32_sched_rr_get_interval(compat_pid_t pid,
+ struct compat_timespec __user *interval)
+{
+ struct timespec t;
+ int ret;
+ mm_segment_t old_fs = get_fs();
+
+ set_fs(KERNEL_DS);
+ ret = sys_sched_rr_get_interval(pid, (struct timespec __user *)&t);
+ set_fs(old_fs);
+ if (put_compat_timespec(&t, interval))
+ return -EFAULT;
+ return ret;
+}
+
+asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set,
+ compat_size_t sigsetsize)
+{
+ sigset_t s;
+ compat_sigset_t s32;
+ int ret;
+ mm_segment_t old_fs = get_fs();
+
+ set_fs(KERNEL_DS);
+ ret = sys_rt_sigpending((sigset_t __user *)&s, sigsetsize);
+ set_fs(old_fs);
+ if (!ret) {
+ switch (_NSIG_WORDS) {
+ case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
+ case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
+ case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
+ case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
+ }
+ if (copy_to_user(set, &s32, sizeof(compat_sigset_t)))
+ return -EFAULT;
+ }
+ return ret;
+}
+
+asmlinkage long sys32_rt_sigqueueinfo(int pid, int sig,
+ compat_siginfo_t __user *uinfo)
+{
+ siginfo_t info;
+ int ret;
+ mm_segment_t old_fs = get_fs();
+
+ if (copy_siginfo_from_user32(&info, uinfo))
+ return -EFAULT;
+ set_fs(KERNEL_DS);
+ ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *)&info);
+ set_fs(old_fs);
+ return ret;
+}
+
+/* warning: next two assume little endian */
+asmlinkage long sys32_pread(unsigned int fd, char __user *ubuf, u32 count,
+ u32 poslo, u32 poshi)
+{
+ return sys_pread64(fd, ubuf, count,
+ ((loff_t)AA(poshi) << 32) | AA(poslo));
+}
+
+asmlinkage long sys32_pwrite(unsigned int fd, const char __user *ubuf,
+ u32 count, u32 poslo, u32 poshi)
+{
+ return sys_pwrite64(fd, ubuf, count,
+ ((loff_t)AA(poshi) << 32) | AA(poslo));
+}
+
+
+asmlinkage long sys32_personality(unsigned long personality)
+{
+ int ret;
+
+ if (personality(current->personality) == PER_LINUX32 &&
+ personality == PER_LINUX)
+ personality = PER_LINUX32;
+ ret = sys_personality(personality);
+ if (ret == PER_LINUX32)
+ ret = PER_LINUX;
+ return ret;
+}
+
+asmlinkage long sys32_sendfile(int out_fd, int in_fd,
+ compat_off_t __user *offset, s32 count)
+{
+ mm_segment_t old_fs = get_fs();
+ int ret;
+ off_t of;
+
+ if (offset && get_user(of, offset))
+ return -EFAULT;
+
+ set_fs(KERNEL_DS);
+ ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL,
+ count);
+ set_fs(old_fs);
+
+ if (offset && put_user(of, offset))
+ return -EFAULT;
+ return ret;
+}
+
+asmlinkage long sys32_execve(const char __user *name, compat_uptr_t __user *argv,
+ compat_uptr_t __user *envp, struct pt_regs *regs)
+{
+ long error;
+ char *filename;
+
+ filename = getname(name);
+ error = PTR_ERR(filename);
+ if (IS_ERR(filename))
+ return error;
+ error = compat_do_execve(filename, argv, envp, regs);
+ putname(filename);
+ return error;
+}
+
+asmlinkage long sys32_clone(unsigned int clone_flags, unsigned int newsp,
+ struct pt_regs *regs)
+{
+ void __user *parent_tid = (void __user *)regs->dx;
+ void __user *child_tid = (void __user *)regs->di;
+
+ if (!newsp)
+ newsp = regs->sp;
+ return do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid);
+}
+
+/*
+ * Some system calls that need sign extended arguments. This could be
+ * done by a generic wrapper.
+ */
+long sys32_lseek(unsigned int fd, int offset, unsigned int whence)
+{
+ return sys_lseek(fd, offset, whence);
+}
+
+long sys32_kill(int pid, int sig)
+{
+ return sys_kill(pid, sig);
+}
+
+long sys32_fadvise64_64(int fd, __u32 offset_low, __u32 offset_high,
+ __u32 len_low, __u32 len_high, int advice)
+{
+ return sys_fadvise64_64(fd,
+ (((u64)offset_high)<<32) | offset_low,
+ (((u64)len_high)<<32) | len_low,
+ advice);
+}
+
+long sys32_vm86_warning(void)
+{
+ struct task_struct *me = current;
+ static char lastcomm[sizeof(me->comm)];
+
+ if (strncmp(lastcomm, me->comm, sizeof(lastcomm))) {
+ compat_printk(KERN_INFO
+ "%s: vm86 mode not supported on 64 bit kernel\n",
+ me->comm);
+ strncpy(lastcomm, me->comm, sizeof(lastcomm));
+ }
+ return -ENOSYS;
+}
+
+long sys32_lookup_dcookie(u32 addr_low, u32 addr_high,
+ char __user *buf, size_t len)
+{
+ return sys_lookup_dcookie(((u64)addr_high << 32) | addr_low, buf, len);
+}
+
+asmlinkage ssize_t sys32_readahead(int fd, unsigned off_lo, unsigned off_hi,
+ size_t count)
+{
+ return sys_readahead(fd, ((u64)off_hi << 32) | off_lo, count);
+}
+
+asmlinkage long sys32_sync_file_range(int fd, unsigned off_low, unsigned off_hi,
+ unsigned n_low, unsigned n_hi, int flags)
+{
+ return sys_sync_file_range(fd,
+ ((u64)off_hi << 32) | off_low,
+ ((u64)n_hi << 32) | n_low, flags);
+}
+
+asmlinkage long sys32_fadvise64(int fd, unsigned offset_lo, unsigned offset_hi,
+ size_t len, int advice)
+{
+ return sys_fadvise64_64(fd, ((u64)offset_hi << 32) | offset_lo,
+ len, advice);
+}
+
+asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_lo,
+ unsigned offset_hi, unsigned len_lo,
+ unsigned len_hi)
+{
+ return sys_fallocate(fd, mode, ((u64)offset_hi << 32) | offset_lo,
+ ((u64)len_hi << 32) | len_lo);
+}
+
+asmlinkage long sys32_fanotify_mark(int fanotify_fd, unsigned int flags,
+ u32 mask_lo, u32 mask_hi,
+ int fd, const char __user *pathname)
+{
+ return sys_fanotify_mark(fanotify_fd, flags,
+ ((u64)mask_hi << 32) | mask_lo,
+ fd, pathname);
+}
diff --git a/arch/x86/ia32/syscall_ia32.c b/arch/x86/ia32/syscall_ia32.c
new file mode 100644
index 00000000..4754ba0f
--- /dev/null
+++ b/arch/x86/ia32/syscall_ia32.c
@@ -0,0 +1,25 @@
+/* System call table for ia32 emulation. */
+
+#include <linux/linkage.h>
+#include <linux/sys.h>
+#include <linux/cache.h>
+#include <asm/asm-offsets.h>
+
+#define __SYSCALL_I386(nr, sym, compat) extern asmlinkage void compat(void) ;
+#include <asm/syscalls_32.h>
+#undef __SYSCALL_I386
+
+#define __SYSCALL_I386(nr, sym, compat) [nr] = compat,
+
+typedef void (*sys_call_ptr_t)(void);
+
+extern void compat_ni_syscall(void);
+
+const sys_call_ptr_t ia32_sys_call_table[__NR_ia32_syscall_max+1] = {
+ /*
+ * Smells like a compiler bug -- it doesn't work
+ * when the & below is removed.
+ */
+ [0 ... __NR_ia32_syscall_max] = &compat_ni_syscall,
+#include <asm/syscalls_32.h>
+};
generated by cgit (git 2.34.1) at 2024-12-20 09:16:33 +0000