diff options
| -rw-r--r-- | arch/um/include/os.h | 4 | ||||
| -rw-r--r-- | arch/um/kernel/exec_kern.c | 12 | ||||
| -rw-r--r-- | arch/um/kernel/process_kern.c | 20 | ||||
| -rw-r--r-- | arch/um/kernel/ptrace.c | 10 | ||||
| -rw-r--r-- | arch/um/kernel/skas/process_kern.c | 2 | ||||
| -rw-r--r-- | arch/um/os-Linux/Makefile | 4 | ||||
| -rw-r--r-- | arch/um/os-Linux/tls.c | 77 | ||||
| -rw-r--r-- | arch/um/sys-i386/Makefile | 3 | ||||
| -rw-r--r-- | arch/um/sys-i386/ptrace.c | 2 | ||||
| -rw-r--r-- | arch/um/sys-i386/sys_call_table.S | 2 | ||||
| -rw-r--r-- | arch/um/sys-i386/syscalls.c | 14 | ||||
| -rw-r--r-- | arch/um/sys-i386/tls.c | 326 | ||||
| -rw-r--r-- | arch/um/sys-x86_64/Makefile | 3 | ||||
| -rw-r--r-- | arch/um/sys-x86_64/tls.c | 14 | ||||
| -rw-r--r-- | include/asm-um/desc.h | 12 | ||||
| -rw-r--r-- | include/asm-um/processor-i386.h | 35 | ||||
| -rw-r--r-- | include/asm-um/processor-x86_64.h | 9 | ||||
| -rw-r--r-- | include/asm-um/ptrace-generic.h | 14 | ||||
| -rw-r--r-- | include/asm-um/ptrace-i386.h | 41 | ||||
| -rw-r--r-- | include/asm-um/ptrace-x86_64.h | 35 | ||||
| -rw-r--r-- | include/asm-um/segment.h | 2 |
21 files changed, 580 insertions, 61 deletions
diff --git a/arch/um/include/os.h b/arch/um/include/os.h index 5fb84e889b2b61..e9e1db1e08d012 100644 --- a/arch/um/include/os.h +++ b/arch/um/include/os.h @@ -236,6 +236,10 @@ extern int run_helper_thread(int (*proc)(void *), void *arg, int stack_order); extern int helper_wait(int pid); + +/* tls.c */ +extern int os_set_thread_area(void *data, int pid); +extern int os_get_thread_area(void *data, int pid); /* umid.c */ extern int umid_file_name(char *name, char *buf, int len); diff --git a/arch/um/kernel/exec_kern.c b/arch/um/kernel/exec_kern.c index f9b346e05b007a..c0cb627bf594bd 100644 --- a/arch/um/kernel/exec_kern.c +++ b/arch/um/kernel/exec_kern.c @@ -22,6 +22,7 @@ void flush_thread(void) { + arch_flush_thread(¤t->thread.arch); CHOOSE_MODE(flush_thread_tt(), flush_thread_skas()); } @@ -74,14 +75,3 @@ long sys_execve(char __user *file, char __user *__user *argv, unlock_kernel(); return(error); } - -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-file-style: "linux" - * End: - */ diff --git a/arch/um/kernel/process_kern.c b/arch/um/kernel/process_kern.c index ba8a52c1f7aec8..f6a5a502120beb 100644 --- a/arch/um/kernel/process_kern.c +++ b/arch/um/kernel/process_kern.c @@ -156,9 +156,25 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long sp, unsigned long stack_top, struct task_struct * p, struct pt_regs *regs) { + int ret; + p->thread = (struct thread_struct) INIT_THREAD; - return(CHOOSE_MODE_PROC(copy_thread_tt, copy_thread_skas, nr, - clone_flags, sp, stack_top, p, regs)); + ret = CHOOSE_MODE_PROC(copy_thread_tt, copy_thread_skas, nr, + clone_flags, sp, stack_top, p, regs); + + if (ret || !current->thread.forking) + goto out; + + clear_flushed_tls(p); + + /* + * Set a new TLS for the child thread? + */ + if (clone_flags & CLONE_SETTLS) + ret = arch_copy_tls(p); + +out: + return ret; } void initial_thread_cb(void (*proc)(void *), void *arg) diff --git a/arch/um/kernel/ptrace.c b/arch/um/kernel/ptrace.c index 394582202ce628..60d2eda995c175 100644 --- a/arch/um/kernel/ptrace.c +++ b/arch/um/kernel/ptrace.c @@ -185,6 +185,16 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) ret = set_fpxregs(data, child); break; #endif + case PTRACE_GET_THREAD_AREA: + ret = ptrace_get_thread_area(child, addr, + (struct user_desc __user *) data); + break; + + case PTRACE_SET_THREAD_AREA: + ret = ptrace_set_thread_area(child, addr, + (struct user_desc __user *) data); + break; + case PTRACE_FAULTINFO: { /* Take the info from thread->arch->faultinfo, * but transfer max. sizeof(struct ptrace_faultinfo). diff --git a/arch/um/kernel/skas/process_kern.c b/arch/um/kernel/skas/process_kern.c index 14360ac17f028d..38b185370c4226 100644 --- a/arch/um/kernel/skas/process_kern.c +++ b/arch/um/kernel/skas/process_kern.c @@ -111,6 +111,8 @@ int copy_thread_skas(int nr, unsigned long clone_flags, unsigned long sp, if(sp != 0) REGS_SP(p->thread.regs.regs.skas.regs) = sp; handler = fork_handler; + + arch_copy_thread(¤t->thread.arch, &p->thread.arch); } else { init_thread_registers(&p->thread.regs.regs); diff --git a/arch/um/os-Linux/Makefile b/arch/um/os-Linux/Makefile index 9e0788cf3aecdd..f4bfc4c7ccac25 100644 --- a/arch/um/os-Linux/Makefile +++ b/arch/um/os-Linux/Makefile @@ -4,7 +4,7 @@ # obj-y = aio.o elf_aux.o file.o helper.o irq.o main.o mem.o process.o sigio.o \ - signal.o start_up.o time.o trap.o tt.o tty.o uaccess.o umid.o \ + signal.o start_up.o time.o trap.o tt.o tty.o uaccess.o umid.o tls.o \ user_syms.o util.o drivers/ sys-$(SUBARCH)/ obj-$(CONFIG_MODE_SKAS) += skas/ @@ -12,7 +12,7 @@ obj-$(CONFIG_TTY_LOG) += tty_log.o user-objs-$(CONFIG_TTY_LOG) += tty_log.o USER_OBJS := $(user-objs-y) aio.o elf_aux.o file.o helper.o irq.o main.o mem.o \ - process.o sigio.o signal.o start_up.o time.o trap.o tt.o tty.o \ + process.o sigio.o signal.o start_up.o time.o trap.o tt.o tty.o tls.o \ uaccess.o umid.o util.o CFLAGS_user_syms.o += -DSUBARCH_$(SUBARCH) diff --git a/arch/um/os-Linux/tls.c b/arch/um/os-Linux/tls.c new file mode 100644 index 00000000000000..63dfcf70937723 --- /dev/null +++ b/arch/um/os-Linux/tls.c @@ -0,0 +1,77 @@ +#include <errno.h> +#include <sys/ptrace.h> +#include <asm/ldt.h> +#include "uml-config.h" + +/* TLS support - we basically rely on the host's one.*/ + +/* In TT mode, this should be called only by the tracing thread, and makes sense + * only for PTRACE_SET_THREAD_AREA. In SKAS mode, it's used normally. + * + */ + +#ifndef PTRACE_GET_THREAD_AREA +#define PTRACE_GET_THREAD_AREA 25 +#endif + +#ifndef PTRACE_SET_THREAD_AREA +#define PTRACE_SET_THREAD_AREA 26 +#endif + +int os_set_thread_area(void *data, int pid) +{ + struct user_desc *info = data; + int ret; + + ret = ptrace(PTRACE_SET_THREAD_AREA, pid, info->entry_number, + (unsigned long) info); + if (ret < 0) + ret = -errno; + return ret; +} + +#ifdef UML_CONFIG_MODE_SKAS + +int os_get_thread_area(void *data, int pid) +{ + struct user_desc *info = data; + int ret; + + ret = ptrace(PTRACE_GET_THREAD_AREA, pid, info->entry_number, + (unsigned long) info); + if (ret < 0) + ret = -errno; + return ret; +} + +#endif + +#ifdef UML_CONFIG_MODE_TT +#include "linux/unistd.h" + +_syscall1(int, get_thread_area, struct user_desc *, u_info); +_syscall1(int, set_thread_area, struct user_desc *, u_info); + +int do_set_thread_area_tt(struct user_desc *info) +{ + int ret; + + ret = set_thread_area(info); + if (ret < 0) { + ret = -errno; + } + return ret; +} + +int do_get_thread_area_tt(struct user_desc *info) +{ + int ret; + + ret = get_thread_area(info); + if (ret < 0) { + ret = -errno; + } + return ret; +} + +#endif /* UML_CONFIG_MODE_TT */ diff --git a/arch/um/sys-i386/Makefile b/arch/um/sys-i386/Makefile index 2c06a07a1bdbd8..98b20b7bba4f90 100644 --- a/arch/um/sys-i386/Makefile +++ b/arch/um/sys-i386/Makefile @@ -1,5 +1,6 @@ obj-y = bugs.o checksum.o delay.o fault.o ksyms.o ldt.o ptrace.o \ - ptrace_user.o signal.o sigcontext.o syscalls.o sysrq.o sys_call_table.o + ptrace_user.o signal.o sigcontext.o syscalls.o sysrq.o \ + sys_call_table.o tls.o obj-$(CONFIG_MODE_SKAS) += stub.o stub_segv.o diff --git a/arch/um/sys-i386/ptrace.c b/arch/um/sys-i386/ptrace.c index 927fcd95565136..6a23cc6947c3c6 100644 --- a/arch/um/sys-i386/ptrace.c +++ b/arch/um/sys-i386/ptrace.c @@ -18,10 +18,12 @@ void arch_switch_to_tt(struct task_struct *from, struct task_struct *to) { update_debugregs(to->thread.arch.debugregs_seq); + arch_switch_tls_tt(from, to); } void arch_switch_to_skas(struct task_struct *from, struct task_struct *to) { + arch_switch_tls_skas(from, to); } int is_syscall(unsigned long addr) diff --git a/arch/um/sys-i386/sys_call_table.S b/arch/um/sys-i386/sys_call_table.S index ad75c27afe38a3..1ff61474b25c69 100644 --- a/arch/um/sys-i386/sys_call_table.S +++ b/arch/um/sys-i386/sys_call_table.S @@ -6,8 +6,6 @@ #define sys_vm86old sys_ni_syscall #define sys_vm86 sys_ni_syscall -#define sys_set_thread_area sys_ni_syscall -#define sys_get_thread_area sys_ni_syscall #define sys_stime um_stime #define sys_time um_time diff --git a/arch/um/sys-i386/syscalls.c b/arch/um/sys-i386/syscalls.c index 1845123ed1249b..749dd1bfe60f90 100644 --- a/arch/um/sys-i386/syscalls.c +++ b/arch/um/sys-i386/syscalls.c @@ -61,21 +61,27 @@ long old_select(struct sel_arg_struct __user *arg) return sys_select(a.n, a.inp, a.outp, a.exp, a.tvp); } -/* The i386 version skips reading from %esi, the fourth argument. So we must do - * this, too. +/* + * The prototype on i386 is: + * + * int clone(int flags, void * child_stack, int * parent_tidptr, struct user_desc * newtls, int * child_tidptr) + * + * and the "newtls" arg. on i386 is read by copy_thread directly from the + * register saved on the stack. */ long sys_clone(unsigned long clone_flags, unsigned long newsp, - int __user *parent_tid, int unused, int __user *child_tid) + int __user *parent_tid, void *newtls, int __user *child_tid) { long ret; if (!newsp) newsp = UPT_SP(¤t->thread.regs.regs); + current->thread.forking = 1; ret = do_fork(clone_flags, newsp, ¤t->thread.regs, 0, parent_tid, child_tid); current->thread.forking = 0; - return(ret); + return ret; } /* diff --git a/arch/um/sys-i386/tls.c b/arch/um/sys-i386/tls.c new file mode 100644 index 00000000000000..e3c5bc593faea2 --- /dev/null +++ b/arch/um/sys-i386/tls.c @@ -0,0 +1,326 @@ +/* + * Copyright (C) 2005 Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> + * Licensed under the GPL + */ + +#include "linux/config.h" +#include "linux/kernel.h" +#include "linux/sched.h" +#include "linux/slab.h" +#include "linux/types.h" +#include "asm/uaccess.h" +#include "asm/ptrace.h" +#include "asm/segment.h" +#include "asm/smp.h" +#include "asm/desc.h" +#include "choose-mode.h" +#include "kern.h" +#include "kern_util.h" +#include "mode_kern.h" +#include "os.h" +#include "mode.h" + +#ifdef CONFIG_MODE_SKAS +#include "skas.h" +#endif + +#ifdef CONFIG_MODE_SKAS +int do_set_thread_area_skas(struct user_desc *info) +{ + int ret; + u32 cpu; + + cpu = get_cpu(); + ret = os_set_thread_area(info, userspace_pid[cpu]); + put_cpu(); + return ret; +} + +int do_get_thread_area_skas(struct user_desc *info) +{ + int ret; + u32 cpu; + + cpu = get_cpu(); + ret = os_get_thread_area(info, userspace_pid[cpu]); + put_cpu(); + return ret; +} +#endif + +/* + * sys_get_thread_area: get a yet unused TLS descriptor index. + * XXX: Consider leaving one free slot for glibc usage at first place. This must + * be done here (and by changing GDT_ENTRY_TLS_* macros) and nowhere else. + * + * Also, this must be tested when compiling in SKAS mode with dinamic linking + * and running against NPTL. + */ +static int get_free_idx(struct task_struct* task) +{ + struct thread_struct *t = &task->thread; + int idx; + + if (!t->arch.tls_array) + return GDT_ENTRY_TLS_MIN; + + for (idx = 0; idx < GDT_ENTRY_TLS_ENTRIES; idx++) + if (!t->arch.tls_array[idx].present) + return idx + GDT_ENTRY_TLS_MIN; + return -ESRCH; +} + +#define O_FORCE 1 + +static inline void clear_user_desc(struct user_desc* info) +{ + /* Postcondition: LDT_empty(info) returns true. */ + memset(info, 0, sizeof(*info)); + + /* Check the LDT_empty or the i386 sys_get_thread_area code - we obtain + * indeed an empty user_desc. + */ + info->read_exec_only = 1; + info->seg_not_present = 1; +} + +static int load_TLS(int flags, struct task_struct *to) +{ + int ret = 0; + int idx; + + for (idx = GDT_ENTRY_TLS_MIN; idx < GDT_ENTRY_TLS_MAX; idx++) { + struct uml_tls_struct* curr = &to->thread.arch.tls_array[idx - GDT_ENTRY_TLS_MIN]; + + /* Actually, now if it wasn't flushed it gets cleared and + * flushed to the host, which will clear it.*/ + if (!curr->present) { + if (!curr->flushed) { + clear_user_desc(&curr->tls); + curr->tls.entry_number = idx; + } else { + WARN_ON(!LDT_empty(&curr->tls)); + continue; + } + } + + if (!(flags & O_FORCE) && curr->flushed) + continue; + + ret = do_set_thread_area(&curr->tls); + if (ret) + goto out; + + curr->flushed = 1; + } +out: + return ret; +} + +/* Verify if we need to do a flush for the new process, i.e. if there are any + * present desc's, only if they haven't been flushed. + */ +static inline int needs_TLS_update(struct task_struct *task) +{ + int i; + int ret = 0; + + for (i = GDT_ENTRY_TLS_MIN; i < GDT_ENTRY_TLS_MAX; i++) { + struct uml_tls_struct* curr = &task->thread.arch.tls_array[i - GDT_ENTRY_TLS_MIN]; + + /* Can't test curr->present, we may need to clear a descriptor + * which had a value. */ + if (curr->flushed) + continue; + ret = 1; + break; + } + return ret; +} + +/* On a newly forked process, the TLS descriptors haven't yet been flushed. So + * we mark them as such and the first switch_to will do the job. + */ +void clear_flushed_tls(struct task_struct *task) +{ + int i; + + for (i = GDT_ENTRY_TLS_MIN; i < GDT_ENTRY_TLS_MAX; i++) { + struct uml_tls_struct* curr = &task->thread.arch.tls_array[i - GDT_ENTRY_TLS_MIN]; + + /* Still correct to do this, if it wasn't present on the host it + * will remain as flushed as it was. */ + if (!curr->present) + continue; + + curr->flushed = 0; + } +} + +/* This in SKAS0 does not need to be used, since we have different host + * processes. Nor will this need to be used when we'll add support to the host + * SKAS patch. */ +int arch_switch_tls_skas(struct task_struct *from, struct task_struct *to) +{ + return load_TLS(O_FORCE, to); +} + +int arch_switch_tls_tt(struct task_struct *from, struct task_struct *to) +{ + if (needs_TLS_update(to)) + return load_TLS(0, to); + + return 0; +} + +static int set_tls_entry(struct task_struct* task, struct user_desc *info, + int idx, int flushed) +{ + struct thread_struct *t = &task->thread; + + if (idx < GDT_ENTRY_TLS_MIN || idx > GDT_ENTRY_TLS_MAX) + return -EINVAL; + + t->arch.tls_array[idx - GDT_ENTRY_TLS_MIN].tls = *info; + t->arch.tls_array[idx - GDT_ENTRY_TLS_MIN].present = 1; + t->arch.tls_array[idx - GDT_ENTRY_TLS_MIN].flushed = flushed; + + return 0; +} + +int arch_copy_tls(struct task_struct *new) +{ + struct user_desc info; + int idx, ret = -EFAULT; + + if (copy_from_user(&info, + (void __user *) UPT_ESI(&new->thread.regs.regs), + sizeof(info))) + goto out; + + ret = -EINVAL; + if (LDT_empty(&info)) + goto out; + + idx = info.entry_number; + + ret = set_tls_entry(new, &info, idx, 0); +out: + return ret; +} + +/* XXX: use do_get_thread_area to read the host value? I'm not at all sure! */ +static int get_tls_entry(struct task_struct* task, struct user_desc *info, int idx) +{ + struct thread_struct *t = &task->thread; + + if (!t->arch.tls_array) + goto clear; + + if (idx < GDT_ENTRY_TLS_MIN || idx > GDT_ENTRY_TLS_MAX) + return -EINVAL; + + if (!t->arch.tls_array[idx - GDT_ENTRY_TLS_MIN].present) + goto clear; + + *info = t->arch.tls_array[idx - GDT_ENTRY_TLS_MIN].tls; + +out: + /* Temporary debugging check, to make sure that things have been + * flushed. This could be triggered if load_TLS() failed. + */ + if (unlikely(task == current && !t->arch.tls_array[idx - GDT_ENTRY_TLS_MIN].flushed)) { + printk(KERN_ERR "get_tls_entry: task with pid %d got here " + "without flushed TLS.", current->pid); + } + + return 0; +clear: + /* When the TLS entry has not been set, the values read to user in the + * tls_array are 0 (because it's cleared at boot, see + * arch/i386/kernel/head.S:cpu_gdt_table). Emulate that. + */ + clear_user_desc(info); + info->entry_number = idx; + goto out; +} + +asmlinkage int sys_set_thread_area(struct user_desc __user *user_desc) +{ + struct user_desc info; + int idx, ret; + + if (copy_from_user(&info, user_desc, sizeof(info))) + return -EFAULT; + + idx = info.entry_number; + + if (idx == -1) { + idx = get_free_idx(current); + if (idx < 0) + return idx; + info.entry_number = idx; + /* Tell the user which slot we chose for him.*/ + if (put_user(idx, &user_desc->entry_number)) + return -EFAULT; + } + + ret = CHOOSE_MODE_PROC(do_set_thread_area_tt, do_set_thread_area_skas, &info); + if (ret) + return ret; + return set_tls_entry(current, &info, idx, 1); +} + +/* + * Perform set_thread_area on behalf of the traced child. + * Note: error handling is not done on the deferred load, and this differ from + * i386. However the only possible error are caused by bugs. + */ +int ptrace_set_thread_area(struct task_struct *child, int idx, + struct user_desc __user *user_desc) +{ + struct user_desc info; + + if (copy_from_user(&info, user_desc, sizeof(info))) + return -EFAULT; + + return set_tls_entry(child, &info, idx, 0); +} + +asmlinkage int sys_get_thread_area(struct user_desc __user *user_desc) +{ + struct user_desc info; + int idx, ret; + + if (get_user(idx, &user_desc->entry_number)) + return -EFAULT; + + ret = get_tls_entry(current, &info, idx); + if (ret < 0) + goto out; + + if (copy_to_user(user_desc, &info, sizeof(info))) + ret = -EFAULT; + +out: + return ret; +} + +/* + * Perform get_thread_area on behalf of the traced child. + */ +int ptrace_get_thread_area(struct task_struct *child, int idx, + struct user_desc __user *user_desc) +{ + struct user_desc info; + int ret; + + ret = get_tls_entry(child, &info, idx); + if (ret < 0) + goto out; + + if (copy_to_user(user_desc, &info, sizeof(info))) + ret = -EFAULT; +out: + return ret; +} diff --git a/arch/um/sys-x86_64/Makefile b/arch/um/sys-x86_64/Makefile index 1ee2ed1599bec9..b5fc22babddf20 100644 --- a/arch/um/sys-x86_64/Makefile +++ b/arch/um/sys-x86_64/Makefile @@ -5,7 +5,8 @@ # obj-y = bugs.o delay.o fault.o ldt.o mem.o ptrace.o ptrace_user.o \ - sigcontext.o signal.o syscalls.o syscall_table.o sysrq.o ksyms.o + sigcontext.o signal.o syscalls.o syscall_table.o sysrq.o ksyms.o \ + tls.o obj-$(CONFIG_MODE_SKAS) += stub.o stub_segv.o obj-$(CONFIG_MODULES) += um_module.o diff --git a/arch/um/sys-x86_64/tls.c b/arch/um/sys-x86_64/tls.c new file mode 100644 index 00000000000000..ce1bf1b81c431d --- /dev/null +++ b/arch/um/sys-x86_64/tls.c @@ -0,0 +1,14 @@ +#include "linux/sched.h" + +void debug_arch_force_load_TLS(void) +{ +} + +void clear_flushed_tls(struct task_struct *task) +{ +} + +int arch_copy_tls(struct task_struct *t) +{ + return 0; +} diff --git a/include/asm-um/desc.h b/include/asm-um/desc.h index ac1d2a20d17816..4ec34a51b62c96 100644 --- a/include/asm-um/desc.h +++ b/include/asm-um/desc.h @@ -1,6 +1,16 @@ #ifndef __UM_DESC_H #define __UM_DESC_H -#include "asm/arch/desc.h" +/* Taken from asm-i386/desc.h, it's the only thing we need. The rest wouldn't + * compile, and has never been used. */ +#define LDT_empty(info) (\ + (info)->base_addr == 0 && \ + (info)->limit == 0 && \ + (info)->contents == 0 && \ + (info)->read_exec_only == 1 && \ + (info)->seg_32bit == 0 && \ + (info)->limit_in_pages == 0 && \ + (info)->seg_not_present == 1 && \ + (info)->useable == 0 ) #endif diff --git a/include/asm-um/processor-i386.h b/include/asm-um/processor-i386.h index 4108a579eb92a5..595f1c3e1e4006 100644 --- a/include/asm-um/processor-i386.h +++ b/include/asm-um/processor-i386.h @@ -1,4 +1,4 @@ -/* +/* * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) * Licensed under the GPL */ @@ -6,21 +6,48 @@ #ifndef __UM_PROCESSOR_I386_H #define __UM_PROCESSOR_I386_H +#include "linux/string.h" +#include "asm/host_ldt.h" +#include "asm/segment.h" + extern int host_has_xmm; extern int host_has_cmov; /* include faultinfo structure */ #include "sysdep/faultinfo.h" +struct uml_tls_struct { + struct user_desc tls; + unsigned flushed:1; + unsigned present:1; +}; + struct arch_thread { + struct uml_tls_struct tls_array[GDT_ENTRY_TLS_ENTRIES]; unsigned long debugregs[8]; int debugregs_seq; struct faultinfo faultinfo; }; -#define INIT_ARCH_THREAD { .debugregs = { [ 0 ... 7 ] = 0 }, \ - .debugregs_seq = 0, \ - .faultinfo = { 0, 0, 0 } } +#define INIT_ARCH_THREAD { \ + .tls_array = { [ 0 ... GDT_ENTRY_TLS_ENTRIES - 1 ] = \ + { .present = 0, .flushed = 0 } }, \ + .debugregs = { [ 0 ... 7 ] = 0 }, \ + .debugregs_seq = 0, \ + .faultinfo = { 0, 0, 0 } \ +} + +static inline void arch_flush_thread(struct arch_thread *thread) +{ + /* Clear any TLS still hanging */ + memset(&thread->tls_array, 0, sizeof(thread->tls_array)); +} + +static inline void arch_copy_thread(struct arch_thread *from, + struct arch_thread *to) +{ + memcpy(&to->tls_array, &from->tls_array, sizeof(from->tls_array)); +} #include "asm/arch/user.h" diff --git a/include/asm-um/processor-x86_64.h b/include/asm-um/processor-x86_64.h index e1e1255a1d3655..10609af376c033 100644 --- a/include/asm-um/processor-x86_64.h +++ b/include/asm-um/processor-x86_64.h @@ -28,6 +28,15 @@ extern inline void rep_nop(void) .debugregs_seq = 0, \ .faultinfo = { 0, 0, 0 } } +static inline void arch_flush_thread(struct arch_thread *thread) +{ +} + +static inline void arch_copy_thread(struct arch_thread *from, + struct arch_thread *to) +{ +} + #include "asm/arch/user.h" #define current_text_addr() \ diff --git a/include/asm-um/ptrace-generic.h b/include/asm-um/ptrace-generic.h index 8c57e384cb8a7d..503484305e6771 100644 --- a/include/asm-um/ptrace-generic.h +++ b/include/asm-um/ptrace-generic.h @@ -60,17 +60,9 @@ extern void show_regs(struct pt_regs *regs); extern void send_sigtrap(struct task_struct *tsk, union uml_pt_regs *regs, int error_code); -#endif +extern int arch_copy_tls(struct task_struct *new); +extern void clear_flushed_tls(struct task_struct *task); #endif -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-file-style: "linux" - * End: - */ +#endif diff --git a/include/asm-um/ptrace-i386.h b/include/asm-um/ptrace-i386.h index fe882b9d917eb3..30656c962d7428 100644 --- a/include/asm-um/ptrace-i386.h +++ b/include/asm-um/ptrace-i386.h @@ -8,8 +8,11 @@ #define HOST_AUDIT_ARCH AUDIT_ARCH_I386 +#include "linux/compiler.h" #include "sysdep/ptrace.h" #include "asm/ptrace-generic.h" +#include "asm/host_ldt.h" +#include "choose-mode.h" #define PT_REGS_EAX(r) UPT_EAX(&(r)->regs) #define PT_REGS_EBX(r) UPT_EBX(&(r)->regs) @@ -38,15 +41,31 @@ #define user_mode(r) UPT_IS_USER(&(r)->regs) -#endif +extern int ptrace_get_thread_area(struct task_struct *child, int idx, + struct user_desc __user *user_desc); -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-file-style: "linux" - * End: - */ +extern int ptrace_set_thread_area(struct task_struct *child, int idx, + struct user_desc __user *user_desc); + +extern int do_set_thread_area_skas(struct user_desc *info); +extern int do_get_thread_area_skas(struct user_desc *info); + +extern int do_set_thread_area_tt(struct user_desc *info); +extern int do_get_thread_area_tt(struct user_desc *info); + +extern int arch_switch_tls_skas(struct task_struct *from, struct task_struct *to); +extern int arch_switch_tls_tt(struct task_struct *from, struct task_struct *to); + +static inline int do_get_thread_area(struct user_desc *info) +{ + return CHOOSE_MODE_PROC(do_get_thread_area_tt, do_get_thread_area_skas, info); +} + +static inline int do_set_thread_area(struct user_desc *info) +{ + return CHOOSE_MODE_PROC(do_set_thread_area_tt, do_set_thread_area_skas, info); +} + +struct task_struct; + +#endif diff --git a/include/asm-um/ptrace-x86_64.h b/include/asm-um/ptrace-x86_64.h index be51219a8ffe46..c894e68b1f9697 100644 --- a/include/asm-um/ptrace-x86_64.h +++ b/include/asm-um/ptrace-x86_64.h @@ -8,6 +8,8 @@ #define __UM_PTRACE_X86_64_H #include "linux/compiler.h" +#include "asm/errno.h" +#include "asm/host_ldt.h" #define signal_fault signal_fault_x86_64 #define __FRAME_OFFSETS /* Needed to get the R* macros */ @@ -63,15 +65,26 @@ void signal_fault(struct pt_regs_subarch *regs, void *frame, char *where); #define profile_pc(regs) PT_REGS_IP(regs) -#endif +static inline int ptrace_get_thread_area(struct task_struct *child, int idx, + struct user_desc __user *user_desc) +{ + return -ENOSYS; +} -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-file-style: "linux" - * End: - */ +static inline int ptrace_set_thread_area(struct task_struct *child, int idx, + struct user_desc __user *user_desc) +{ + return -ENOSYS; +} + +static inline void arch_switch_to_tt(struct task_struct *from, + struct task_struct *to) +{ +} + +static inline void arch_switch_to_skas(struct task_struct *from, + struct task_struct *to) +{ +} + +#endif diff --git a/include/asm-um/segment.h b/include/asm-um/segment.h index 55e40301f6251f..48775452e2cc60 100644 --- a/include/asm-um/segment.h +++ b/include/asm-um/segment.h @@ -1,4 +1,6 @@ #ifndef __UM_SEGMENT_H #define __UM_SEGMENT_H +#include "asm/arch/segment.h" + #endif |