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-rw-r--r--arch/x86/ia32/Makefile10
-rw-r--r--arch/x86/ia32/audit.c43
-rw-r--r--arch/x86/ia32/ia32_aout.c479
-rw-r--r--arch/x86/ia32/ia32_signal.c497
-rw-r--r--arch/x86/ia32/ia32entry.S611
-rw-r--r--arch/x86/ia32/sys_ia32.c231
6 files changed, 1871 insertions, 0 deletions
diff --git a/arch/x86/ia32/Makefile b/arch/x86/ia32/Makefile
new file mode 100644
index 000000000..bb635c641
--- /dev/null
+++ b/arch/x86/ia32/Makefile
@@ -0,0 +1,10 @@
+#
+# Makefile for the ia32 kernel emulation subsystem.
+#
+
+obj-$(CONFIG_IA32_EMULATION) := ia32entry.o sys_ia32.o ia32_signal.o
+
+obj-$(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 000000000..2eccc8932
--- /dev/null
+++ b/arch/x86/ia32/audit.c
@@ -0,0 +1,43 @@
+#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:
+ case __NR_execveat:
+ 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 000000000..ae6aad1d2
--- /dev/null
+++ b/arch/x86/ia32/ia32_aout.c
@@ -0,0 +1,479 @@
+/*
+ * 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 <linux/perf_event.h>
+
+#include <asm/uaccess.h>
+#include <asm/pgalloc.h>
+#include <asm/cacheflush.h>
+#include <asm/user32.h>
+#include <asm/ia32.h>
+
+#undef WARN_OLD
+
+static int load_aout_binary(struct linux_binprm *);
+static int load_aout_library(struct file *);
+
+#ifdef CONFIG_COREDUMP
+static int aout_core_dump(struct coredump_params *);
+
+static unsigned long get_dr(int n)
+{
+ struct perf_event *bp = current->thread.ptrace_bps[n];
+ return bp ? bp->hw.info.address : 0;
+}
+
+/*
+ * fill in the user structure for a core dump..
+ */
+static void dump_thread32(struct pt_regs *regs, struct user32 *dump)
+{
+ u32 fs, gs;
+ memset(dump, 0, sizeof(*dump));
+
+/* 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_debugreg[0] = get_dr(0);
+ dump->u_debugreg[1] = get_dr(1);
+ dump->u_debugreg[2] = get_dr(2);
+ dump->u_debugreg[3] = get_dr(3);
+ dump->u_debugreg[6] = current->thread.debugreg6;
+ dump->u_debugreg[7] = current->thread.ptrace_dr7;
+
+ if (dump->start_stack < 0xc0000000) {
+ unsigned long tmp;
+
+ tmp = (unsigned long) (0xc0000000 - dump->start_stack);
+ dump->u_ssize = tmp >> PAGE_SHIFT;
+ }
+
+ dump->regs.ebx = regs->bx;
+ dump->regs.ecx = regs->cx;
+ dump->regs.edx = regs->dx;
+ dump->regs.esi = regs->si;
+ dump->regs.edi = regs->di;
+ dump->regs.ebp = regs->bp;
+ dump->regs.eax = 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_eax = regs->orig_ax;
+ dump->regs.eip = regs->ip;
+ dump->regs.cs = regs->cs;
+ dump->regs.eflags = regs->flags;
+ dump->regs.esp = 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 CONFIG_COREDUMP
+ .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 CONFIG_COREDUMP
+/*
+ * 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 START_DATA(u) (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(struct coredump_params *cprm)
+{
+ 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;
+ strncpy(dump.u_comm, current->comm, sizeof(current->comm));
+ dump.u_ar0 = offsetof(struct user32, regs);
+ dump.signal = cprm->siginfo->si_signo;
+ dump_thread32(cprm->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 > cprm->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 > cprm->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 */
+ if (!dump_emit(cprm, &dump, sizeof(dump)))
+ goto end_coredump;
+ /* Now dump all of the user data. Include malloced stuff as well */
+ if (!dump_skip(cprm, PAGE_SIZE - sizeof(dump)))
+ goto end_coredump;
+ /* 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;
+ if (!dump_emit(cprm, (void *)dump_start, dump_size))
+ goto end_coredump;
+ }
+ /* Now prepare to dump the stack area */
+ if (dump.u_ssize != 0) {
+ dump_start = START_STACK(dump);
+ dump_size = dump.u_ssize << PAGE_SHIFT;
+ if (!dump_emit(cprm, (void *)dump_start, dump_size))
+ goto end_coredump;
+ }
+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)
+{
+ unsigned long error, fd_offset, rlim;
+ struct pt_regs *regs = current_pt_regs();
+ 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(file_inode(bprm->file)) <
+ 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));
+
+ retval = setup_arg_pages(bprm, IA32_STACK_TOP, EXSTACK_DEFAULT);
+ if (retval < 0)
+ return retval;
+
+ install_exec_creds(bprm);
+
+ if (N_MAGIC(ex) == OMAGIC) {
+ unsigned long text_addr, map_size;
+
+ text_addr = N_TXTADDR(ex);
+ map_size = ex.a_text+ex.a_data;
+
+ error = vm_brk(text_addr & PAGE_MASK, map_size);
+
+ if (error != (text_addr & PAGE_MASK))
+ return error;
+
+ error = read_code(bprm->file, text_addr, 32,
+ ex.a_text + ex.a_data);
+ if ((signed long)error < 0)
+ return error;
+ } 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: %pD\n",
+ bprm->file);
+ error_time = jiffies;
+ }
+#endif
+
+ if (!bprm->file->f_op->mmap || (fd_offset & ~PAGE_MASK) != 0) {
+ vm_brk(N_TXTADDR(ex), ex.a_text+ex.a_data);
+ read_code(bprm->file, N_TXTADDR(ex), fd_offset,
+ 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))
+ 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))
+ 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)
+{
+ unsigned long bss, start_addr, len, error;
+ int retval;
+ struct exec ex;
+
+
+ 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(file_inode(file)) <
+ 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) {
+#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: %pD\n",
+ file);
+ error_time = jiffies;
+ }
+#endif
+ vm_brk(start_addr, ex.a_text + ex.a_data + ex.a_bss);
+
+ read_code(file, start_addr, N_TXTOFF(ex),
+ 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 000000000..c81d35e6c
--- /dev/null
+++ b/arch/x86/ia32/ia32_signal.c
@@ -0,0 +1,497 @@
+/*
+ * 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>
+#include <asm/smap.h>
+
+int copy_siginfo_to_user32(compat_siginfo_t __user *to, const 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_SYS >> 16:
+ put_user_ex(from->si_syscall, &to->si_syscall);
+ put_user_ex(from->si_arch, &to->si_arch);
+ 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;
+}
+
+/*
+ * 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 tmpflags, err = 0;
+ void __user *buf;
+ u32 tmp;
+
+ /* Always make any pending restarted system calls return -EINTR */
+ current->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); COPY(ax);
+ /* 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);
+ } get_user_catch(err);
+
+ err |= restore_xstate_sig(buf, 1);
+
+ force_iret();
+
+ return err;
+}
+
+asmlinkage long sys32_sigreturn(void)
+{
+ struct pt_regs *regs = current_pt_regs();
+ struct sigframe_ia32 __user *frame = (struct sigframe_ia32 __user *)(regs->sp-8);
+ sigset_t set;
+
+ 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;
+
+ set_current_blocked(&set);
+
+ if (ia32_restore_sigcontext(regs, &frame->sc))
+ goto badframe;
+ return regs->ax;
+
+badframe:
+ signal_fault(regs, frame, "32bit sigreturn");
+ return 0;
+}
+
+asmlinkage long sys32_rt_sigreturn(void)
+{
+ struct pt_regs *regs = current_pt_regs();
+ struct rt_sigframe_ia32 __user *frame;
+ sigset_t set;
+
+ 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;
+
+ set_current_blocked(&set);
+
+ if (ia32_restore_sigcontext(regs, &frame->uc.uc_mcontext))
+ goto badframe;
+
+ if (compat_restore_altstack(&frame->uc.uc_stack))
+ goto badframe;
+
+ return regs->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 ksignal *ksig, struct pt_regs *regs,
+ size_t frame_size,
+ void __user **fpstate)
+{
+ unsigned long sp;
+
+ /* Default to using normal stack */
+ sp = regs->sp;
+
+ /* This is the X/Open sanctioned signal stack switching. */
+ if (ksig->ka.sa.sa_flags & SA_ONSTACK)
+ sp = sigsp(sp, ksig);
+ /* This is the legacy signal stack switching. */
+ else if ((regs->ss & 0xffff) != __USER32_DS &&
+ !(ksig->ka.sa.sa_flags & SA_RESTORER) &&
+ ksig->ka.sa.sa_restorer)
+ sp = (unsigned long) ksig->ka.sa.sa_restorer;
+
+ if (used_math()) {
+ unsigned long fx_aligned, math_size;
+
+ sp = alloc_mathframe(sp, 1, &fx_aligned, &math_size);
+ *fpstate = (struct _fpstate_ia32 __user *) sp;
+ if (save_xstate_sig(*fpstate, (void __user *)fx_aligned,
+ math_size) < 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 ksignal *ksig,
+ 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(ksig, 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 (ksig->ka.sa.sa_flags & SA_RESTORER) {
+ restorer = ksig->ka.sa.sa_restorer;
+ } else {
+ /* Return stub is in 32bit vsyscall page */
+ if (current->mm->context.vdso)
+ restorer = current->mm->context.vdso +
+ selected_vdso32->sym___kernel_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 __user *)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) ksig->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 ksignal *ksig,
+ 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(ksig, 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);
+
+ /* 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);
+ compat_save_altstack_ex(&frame->uc.uc_stack, regs->sp);
+
+ if (ksig->ka.sa.sa_flags & SA_RESTORER)
+ restorer = ksig->ka.sa.sa_restorer;
+ else
+ restorer = current->mm->context.vdso +
+ selected_vdso32->sym___kernel_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 __user *)frame->retcode);
+ } put_user_catch(err);
+
+ err |= copy_siginfo_to_user32(&frame->info, &ksig->info);
+ 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 (err)
+ return -EFAULT;
+
+ /* Set up registers for signal handler */
+ regs->sp = (unsigned long) frame;
+ regs->ip = (unsigned long) ksig->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 000000000..72bf2680f
--- /dev/null
+++ b/arch/x86/ia32/ia32entry.S
@@ -0,0 +1,611 @@
+/*
+ * 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 <asm/asm.h>
+#include <asm/smap.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"
+
+ /* clobbers %rax */
+ .macro CLEAR_RREGS _r9=rax
+ xorl %eax,%eax
+ movq %rax,R11(%rsp)
+ movq %rax,R10(%rsp)
+ movq %\_r9,R9(%rsp)
+ movq %rax,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 _r9=0
+ .if \_r9
+ movl R9(%rsp),%r9d
+ .endif
+ movl RCX(%rsp),%ecx
+ movl RDX(%rsp),%edx
+ movl RSI(%rsp),%esi
+ movl RDI(%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.
+ *
+ * SYSENTER loads ss, rsp, cs, and rip from previously programmed MSRs.
+ * IF and VM in rflags are cleared (IOW: interrupts are off).
+ * SYSENTER does not save anything on the stack,
+ * and does not save old rip (!!!) and rflags.
+ *
+ * Arguments:
+ * eax system call number
+ * ebx arg1
+ * ecx arg2
+ * edx arg3
+ * esi arg4
+ * edi arg5
+ * ebp user stack
+ * 0(%ebp) arg6
+ *
+ * This is purely a fast path. For anything complicated we use the int 0x80
+ * path below. We 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
+
+ /*
+ * Interrupts are off on entry.
+ * We do not frame this tiny irq-off block with TRACE_IRQS_OFF/ON,
+ * it is too small to ever cause noticeable irq latency.
+ */
+ SWAPGS_UNSAFE_STACK
+ movq PER_CPU_VAR(cpu_tss + TSS_sp0), %rsp
+ ENABLE_INTERRUPTS(CLBR_NONE)
+
+ /* Zero-extending 32-bit regs, do not remove */
+ movl %ebp, %ebp
+ movl %eax, %eax
+
+ movl ASM_THREAD_INFO(TI_sysenter_return, %rsp, 0), %r10d
+ CFI_REGISTER rip,r10
+
+ /* Construct struct pt_regs on stack */
+ pushq_cfi $__USER32_DS /* pt_regs->ss */
+ pushq_cfi %rbp /* pt_regs->sp */
+ CFI_REL_OFFSET rsp,0
+ pushfq_cfi /* pt_regs->flags */
+ pushq_cfi $__USER32_CS /* pt_regs->cs */
+ pushq_cfi %r10 /* pt_regs->ip = thread_info->sysenter_return */
+ CFI_REL_OFFSET rip,0
+ pushq_cfi_reg rax /* pt_regs->orig_ax */
+ pushq_cfi_reg rdi /* pt_regs->di */
+ pushq_cfi_reg rsi /* pt_regs->si */
+ pushq_cfi_reg rdx /* pt_regs->dx */
+ pushq_cfi_reg rcx /* pt_regs->cx */
+ pushq_cfi_reg rax /* pt_regs->ax */
+ cld
+ sub $(10*8),%rsp /* pt_regs->r8-11,bp,bx,r12-15 not saved */
+ CFI_ADJUST_CFA_OFFSET 10*8
+
+ /*
+ * no need to do an access_ok check here because rbp has been
+ * 32bit zero extended
+ */
+ ASM_STAC
+1: movl (%rbp),%ebp
+ _ASM_EXTABLE(1b,ia32_badarg)
+ ASM_CLAC
+
+ /*
+ * Sysenter doesn't filter flags, so we need to clear NT
+ * ourselves. To save a few cycles, we can check whether
+ * NT was set instead of doing an unconditional popfq.
+ */
+ testl $X86_EFLAGS_NT,EFLAGS(%rsp)
+ jnz sysenter_fix_flags
+sysenter_flags_fixed:
+
+ orl $TS_COMPAT, ASM_THREAD_INFO(TI_status, %rsp, SIZEOF_PTREGS)
+ testl $_TIF_WORK_SYSCALL_ENTRY, ASM_THREAD_INFO(TI_flags, %rsp, SIZEOF_PTREGS)
+ CFI_REMEMBER_STATE
+ jnz sysenter_tracesys
+ cmpq $(IA32_NR_syscalls-1),%rax
+ ja ia32_badsys
+sysenter_do_call:
+ /* 32bit syscall -> 64bit C ABI argument conversion */
+ movl %edi,%r8d /* arg5 */
+ movl %ebp,%r9d /* arg6 */
+ xchg %ecx,%esi /* rsi:arg2, rcx:arg4 */
+ movl %ebx,%edi /* arg1 */
+ movl %edx,%edx /* arg3 (zero extension) */
+sysenter_dispatch:
+ call *ia32_sys_call_table(,%rax,8)
+ movq %rax,RAX(%rsp)
+ DISABLE_INTERRUPTS(CLBR_NONE)
+ TRACE_IRQS_OFF
+ testl $_TIF_ALLWORK_MASK, ASM_THREAD_INFO(TI_flags, %rsp, SIZEOF_PTREGS)
+ jnz sysexit_audit
+sysexit_from_sys_call:
+ /*
+ * NB: SYSEXIT is not obviously safe for 64-bit kernels -- an
+ * NMI between STI and SYSEXIT has poorly specified behavior,
+ * and and NMI followed by an IRQ with usergs is fatal. So
+ * we just pretend we're using SYSEXIT but we really use
+ * SYSRETL instead.
+ *
+ * This code path is still called 'sysexit' because it pairs
+ * with 'sysenter' and it uses the SYSENTER calling convention.
+ */
+ andl $~TS_COMPAT,ASM_THREAD_INFO(TI_status, %rsp, SIZEOF_PTREGS)
+ movl RIP(%rsp),%ecx /* User %eip */
+ CFI_REGISTER rip,rcx
+ RESTORE_RSI_RDI
+ xorl %edx,%edx /* avoid info leaks */
+ xorq %r8,%r8
+ xorq %r9,%r9
+ xorq %r10,%r10
+ movl EFLAGS(%rsp),%r11d /* User eflags */
+ /*CFI_RESTORE rflags*/
+ TRACE_IRQS_ON
+
+ /*
+ * SYSRETL works even on Intel CPUs. Use it in preference to SYSEXIT,
+ * since it avoids a dicey window with interrupts enabled.
+ */
+ movl RSP(%rsp),%esp
+
+ /*
+ * USERGS_SYSRET32 does:
+ * gsbase = user's gs base
+ * eip = ecx
+ * rflags = r11
+ * cs = __USER32_CS
+ * ss = __USER_DS
+ *
+ * The prologue set RIP(%rsp) to VDSO32_SYSENTER_RETURN, which does:
+ *
+ * pop %ebp
+ * pop %edx
+ * pop %ecx
+ *
+ * Therefore, we invoke SYSRETL with EDX and R8-R10 zeroed to
+ * avoid info leaks. R11 ends up with VDSO32_SYSENTER_RETURN's
+ * address (already known to user code), and R12-R15 are
+ * callee-saved and therefore don't contain any interesting
+ * kernel data.
+ */
+ USERGS_SYSRET32
+
+ CFI_RESTORE_STATE
+
+#ifdef CONFIG_AUDITSYSCALL
+ .macro auditsys_entry_common
+ movl %esi,%r8d /* 5th arg: 4th syscall arg */
+ movl %ecx,%r9d /*swap with edx*/
+ movl %edx,%ecx /* 4th arg: 3rd syscall arg */
+ movl %r9d,%edx /* 3rd arg: 2nd syscall arg */
+ movl %ebx,%esi /* 2nd arg: 1st syscall arg */
+ movl %eax,%edi /* 1st arg: syscall number */
+ call __audit_syscall_entry
+ movl RAX(%rsp),%eax /* reload syscall number */
+ cmpq $(IA32_NR_syscalls-1),%rax
+ ja ia32_badsys
+ movl %ebx,%edi /* reload 1st syscall arg */
+ movl RCX(%rsp),%esi /* reload 2nd syscall arg */
+ movl RDX(%rsp),%edx /* reload 3rd syscall arg */
+ movl RSI(%rsp),%ecx /* reload 4th syscall arg */
+ movl RDI(%rsp),%r8d /* reload 5th syscall arg */
+ .endm
+
+ .macro auditsys_exit exit
+ testl $(_TIF_ALLWORK_MASK & ~_TIF_SYSCALL_AUDIT), ASM_THREAD_INFO(TI_flags, %rsp, SIZEOF_PTREGS)
+ jnz ia32_ret_from_sys_call
+ TRACE_IRQS_ON
+ ENABLE_INTERRUPTS(CLBR_NONE)
+ 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(%rsp),%rax /* reload syscall return value */
+ movl $(_TIF_ALLWORK_MASK & ~_TIF_SYSCALL_AUDIT),%edi
+ DISABLE_INTERRUPTS(CLBR_NONE)
+ TRACE_IRQS_OFF
+ testl %edi, ASM_THREAD_INFO(TI_flags, %rsp, SIZEOF_PTREGS)
+ jz \exit
+ CLEAR_RREGS
+ jmp int_with_check
+ .endm
+
+sysenter_auditsys:
+ auditsys_entry_common
+ movl %ebp,%r9d /* reload 6th syscall arg */
+ jmp sysenter_dispatch
+
+sysexit_audit:
+ auditsys_exit sysexit_from_sys_call
+#endif
+
+sysenter_fix_flags:
+ pushq_cfi $(X86_EFLAGS_IF|X86_EFLAGS_FIXED)
+ popfq_cfi
+ jmp sysenter_flags_fixed
+
+sysenter_tracesys:
+#ifdef CONFIG_AUDITSYSCALL
+ testl $(_TIF_WORK_SYSCALL_ENTRY & ~_TIF_SYSCALL_AUDIT), ASM_THREAD_INFO(TI_flags, %rsp, SIZEOF_PTREGS)
+ jz sysenter_auditsys
+#endif
+ SAVE_EXTRA_REGS
+ 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 /* reload args from stack in case ptrace changed it */
+ RESTORE_EXTRA_REGS
+ 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.
+ *
+ * 32bit SYSCALL saves rip to rcx, clears rflags.RF, then saves rflags to r11,
+ * then loads new ss, cs, and rip from previously programmed MSRs.
+ * rflags gets masked by a value from another MSR (so CLD and CLAC
+ * are not needed). SYSCALL does not save anything on the stack
+ * and does not change rsp.
+ *
+ * Note: rflags saving+masking-with-MSR happens only in Long mode
+ * (in legacy 32bit mode, IF, RF and VM bits are cleared and that's it).
+ * Don't get confused: rflags saving+masking depends on Long Mode Active bit
+ * (EFER.LMA=1), NOT on bitness of userspace where SYSCALL executes
+ * or target CS descriptor's L bit (SYSCALL does not read segment descriptors).
+ *
+ * Arguments:
+ * eax system call number
+ * ecx return address
+ * ebx arg1
+ * ebp arg2 (note: not saved in the stack frame, should not be touched)
+ * edx arg3
+ * esi arg4
+ * edi arg5
+ * esp user stack
+ * 0(%esp) arg6
+ *
+ * This is purely a fast path. For anything complicated we use the int 0x80
+ * path below. We 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,0
+ CFI_REGISTER rip,rcx
+ /*CFI_REGISTER rflags,r11*/
+
+ /*
+ * Interrupts are off on entry.
+ * We do not frame this tiny irq-off block with TRACE_IRQS_OFF/ON,
+ * it is too small to ever cause noticeable irq latency.
+ */
+ SWAPGS_UNSAFE_STACK
+ movl %esp,%r8d
+ CFI_REGISTER rsp,r8
+ movq PER_CPU_VAR(kernel_stack),%rsp
+ ENABLE_INTERRUPTS(CLBR_NONE)
+
+ /* Zero-extending 32-bit regs, do not remove */
+ movl %eax,%eax
+
+ /* Construct struct pt_regs on stack */
+ pushq_cfi $__USER32_DS /* pt_regs->ss */
+ pushq_cfi %r8 /* pt_regs->sp */
+ CFI_REL_OFFSET rsp,0
+ pushq_cfi %r11 /* pt_regs->flags */
+ pushq_cfi $__USER32_CS /* pt_regs->cs */
+ pushq_cfi %rcx /* pt_regs->ip */
+ CFI_REL_OFFSET rip,0
+ pushq_cfi_reg rax /* pt_regs->orig_ax */
+ pushq_cfi_reg rdi /* pt_regs->di */
+ pushq_cfi_reg rsi /* pt_regs->si */
+ pushq_cfi_reg rdx /* pt_regs->dx */
+ pushq_cfi_reg rbp /* pt_regs->cx */
+ movl %ebp,%ecx
+ pushq_cfi_reg rax /* pt_regs->ax */
+ sub $(10*8),%rsp /* pt_regs->r8-11,bp,bx,r12-15 not saved */
+ CFI_ADJUST_CFA_OFFSET 10*8
+
+ /*
+ * no need to do an access_ok check here because r8 has been
+ * 32bit zero extended
+ */
+ ASM_STAC
+1: movl (%r8),%r9d
+ _ASM_EXTABLE(1b,ia32_badarg)
+ ASM_CLAC
+ orl $TS_COMPAT, ASM_THREAD_INFO(TI_status, %rsp, SIZEOF_PTREGS)
+ testl $_TIF_WORK_SYSCALL_ENTRY, ASM_THREAD_INFO(TI_flags, %rsp, SIZEOF_PTREGS)
+ CFI_REMEMBER_STATE
+ jnz cstar_tracesys
+ cmpq $IA32_NR_syscalls-1,%rax
+ ja ia32_badsys
+cstar_do_call:
+ /* 32bit syscall -> 64bit C ABI argument conversion */
+ movl %edi,%r8d /* arg5 */
+ /* r9 already loaded */ /* arg6 */
+ xchg %ecx,%esi /* rsi:arg2, rcx:arg4 */
+ movl %ebx,%edi /* arg1 */
+ movl %edx,%edx /* arg3 (zero extension) */
+cstar_dispatch:
+ call *ia32_sys_call_table(,%rax,8)
+ movq %rax,RAX(%rsp)
+ DISABLE_INTERRUPTS(CLBR_NONE)
+ TRACE_IRQS_OFF
+ testl $_TIF_ALLWORK_MASK, ASM_THREAD_INFO(TI_flags, %rsp, SIZEOF_PTREGS)
+ jnz sysretl_audit
+sysretl_from_sys_call:
+ andl $~TS_COMPAT, ASM_THREAD_INFO(TI_status, %rsp, SIZEOF_PTREGS)
+ RESTORE_RSI_RDI_RDX
+ movl RIP(%rsp),%ecx
+ CFI_REGISTER rip,rcx
+ movl EFLAGS(%rsp),%r11d
+ /*CFI_REGISTER rflags,r11*/
+ xorq %r10,%r10
+ xorq %r9,%r9
+ xorq %r8,%r8
+ TRACE_IRQS_ON
+ movl RSP(%rsp),%esp
+ CFI_RESTORE rsp
+ /*
+ * 64bit->32bit SYSRET restores eip from ecx,
+ * eflags from r11 (but RF and VM bits are forced to 0),
+ * cs and ss are loaded from MSRs.
+ * (Note: 32bit->32bit SYSRET is different: since r11
+ * does not exist, it merely sets eflags.IF=1).
+ *
+ * NB: On AMD CPUs with the X86_BUG_SYSRET_SS_ATTRS bug, the ss
+ * descriptor is not reinitialized. This means that we must
+ * avoid SYSRET with SS == NULL, which could happen if we schedule,
+ * exit the kernel, and re-enter using an interrupt vector. (All
+ * interrupt entries on x86_64 set SS to NULL.) We prevent that
+ * from happening by reloading SS in __switch_to.
+ */
+ USERGS_SYSRET32
+
+#ifdef CONFIG_AUDITSYSCALL
+cstar_auditsys:
+ CFI_RESTORE_STATE
+ movl %r9d,R9(%rsp) /* register to be clobbered by call */
+ auditsys_entry_common
+ movl R9(%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), ASM_THREAD_INFO(TI_flags, %rsp, SIZEOF_PTREGS)
+ jz cstar_auditsys
+#endif
+ xchgl %r9d,%ebp
+ SAVE_EXTRA_REGS
+ CLEAR_RREGS 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 1 /* reload args from stack in case ptrace changed it */
+ RESTORE_EXTRA_REGS
+ 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:
+ ASM_CLAC
+ 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,5*8
+ /*CFI_REL_OFFSET ss,4*8 */
+ CFI_REL_OFFSET rsp,3*8
+ /*CFI_REL_OFFSET rflags,2*8 */
+ /*CFI_REL_OFFSET cs,1*8 */
+ CFI_REL_OFFSET rip,0*8
+
+ /*
+ * Interrupts are off on entry.
+ * We do not frame this tiny irq-off block with TRACE_IRQS_OFF/ON,
+ * it is too small to ever cause noticeable irq latency.
+ */
+ PARAVIRT_ADJUST_EXCEPTION_FRAME
+ SWAPGS
+ ENABLE_INTERRUPTS(CLBR_NONE)
+
+ /* Zero-extending 32-bit regs, do not remove */
+ movl %eax,%eax
+
+ /* Construct struct pt_regs on stack (iret frame is already on stack) */
+ pushq_cfi_reg rax /* pt_regs->orig_ax */
+ pushq_cfi_reg rdi /* pt_regs->di */
+ pushq_cfi_reg rsi /* pt_regs->si */
+ pushq_cfi_reg rdx /* pt_regs->dx */
+ pushq_cfi_reg rcx /* pt_regs->cx */
+ pushq_cfi_reg rax /* pt_regs->ax */
+ cld
+ sub $(10*8),%rsp /* pt_regs->r8-11,bp,bx,r12-15 not saved */
+ CFI_ADJUST_CFA_OFFSET 10*8
+
+ orl $TS_COMPAT, ASM_THREAD_INFO(TI_status, %rsp, SIZEOF_PTREGS)
+ testl $_TIF_WORK_SYSCALL_ENTRY, ASM_THREAD_INFO(TI_flags, %rsp, SIZEOF_PTREGS)
+ jnz ia32_tracesys
+ cmpq $(IA32_NR_syscalls-1),%rax
+ ja ia32_badsys
+ia32_do_call:
+ /* 32bit syscall -> 64bit C ABI argument conversion */
+ movl %edi,%r8d /* arg5 */
+ movl %ebp,%r9d /* arg6 */
+ xchg %ecx,%esi /* rsi:arg2, rcx:arg4 */
+ movl %ebx,%edi /* arg1 */
+ movl %edx,%edx /* arg3 (zero extension) */
+ call *ia32_sys_call_table(,%rax,8) # xxx: rip relative
+ia32_sysret:
+ movq %rax,RAX(%rsp)
+ia32_ret_from_sys_call:
+ CLEAR_RREGS
+ jmp int_ret_from_sys_call
+
+ia32_tracesys:
+ SAVE_EXTRA_REGS
+ 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 /* reload args from stack in case ptrace changed it */
+ RESTORE_EXTRA_REGS
+ 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(%rsp)
+ movq $-ENOSYS,%rax
+ jmp ia32_sysret
+
+ CFI_ENDPROC
+
+ .macro PTREGSCALL label, func
+ ALIGN
+GLOBAL(\label)
+ leaq \func(%rip),%rax
+ jmp ia32_ptregs_common
+ .endm
+
+ CFI_STARTPROC32
+
+ PTREGSCALL stub32_rt_sigreturn, sys32_rt_sigreturn
+ PTREGSCALL stub32_sigreturn, sys32_sigreturn
+ PTREGSCALL stub32_fork, sys_fork
+ PTREGSCALL stub32_vfork, sys_vfork
+
+ ALIGN
+GLOBAL(stub32_clone)
+ leaq sys_clone(%rip),%rax
+ mov %r8, %rcx
+ jmp ia32_ptregs_common
+
+ ALIGN
+ia32_ptregs_common:
+ CFI_ENDPROC
+ CFI_STARTPROC32 simple
+ CFI_SIGNAL_FRAME
+ CFI_DEF_CFA rsp,SIZEOF_PTREGS
+ CFI_REL_OFFSET rax,RAX
+ CFI_REL_OFFSET rcx,RCX
+ CFI_REL_OFFSET rdx,RDX
+ CFI_REL_OFFSET rsi,RSI
+ CFI_REL_OFFSET rdi,RDI
+ CFI_REL_OFFSET rip,RIP
+/* CFI_REL_OFFSET cs,CS*/
+/* CFI_REL_OFFSET rflags,EFLAGS*/
+ CFI_REL_OFFSET rsp,RSP
+/* CFI_REL_OFFSET ss,SS*/
+ SAVE_EXTRA_REGS 8
+ call *%rax
+ RESTORE_EXTRA_REGS 8
+ ret
+ CFI_ENDPROC
+END(ia32_ptregs_common)
diff --git a/arch/x86/ia32/sys_ia32.c b/arch/x86/ia32/sys_ia32.c
new file mode 100644
index 000000000..719cd702b
--- /dev/null
+++ b/arch/x86/ia32/sys_ia32.c
@@ -0,0 +1,231 @@
+/*
+ * 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, from_kuid_munged(current_user_ns(), stat->uid));
+ SET_GID(gid, from_kgid_munged(current_user_ns(), 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_waitpid(compat_pid_t pid, unsigned int __user *stat_addr,
+ int options)
+{
+ return compat_sys_wait4(pid, stat_addr, options, NULL);
+}
+
+/* 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));
+}
+
+
+/*
+ * Some system calls that need sign extended arguments. This could be
+ * done by a generic wrapper.
+ */
+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);
+}
+
+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);
+}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-07 19:21:27 +0000