diff options
Diffstat (limited to 'arch/um/sys-i386')
| -rw-r--r-- | arch/um/sys-i386/Makefile | 10 | ||||
| -rw-r--r-- | arch/um/sys-i386/ldt.c | 67 | ||||
| -rw-r--r-- | arch/um/sys-i386/ptrace.c | 120 | ||||
| -rw-r--r-- | arch/um/sys-i386/ptrace_user.c | 86 | ||||
| -rw-r--r-- | arch/um/sys-i386/signal.c | 58 | ||||
| -rw-r--r-- | arch/um/sys-i386/tls.c | 16 | ||||
| -rw-r--r-- | arch/um/sys-i386/unmap.c | 25 |
7 files changed, 2 insertions, 380 deletions
diff --git a/arch/um/sys-i386/Makefile b/arch/um/sys-i386/Makefile index a4618b6b85b..94b6ede5ef6 100644 --- a/arch/um/sys-i386/Makefile +++ b/arch/um/sys-i386/Makefile @@ -1,8 +1,6 @@ obj-y = bug.o bugs.o checksum.o delay.o fault.o ksyms.o ldt.o ptrace.o \ - ptrace_user.o setjmp.o signal.o sigcontext.o syscalls.o sysrq.o \ - sys_call_table.o tls.o - -obj-$(CONFIG_MODE_SKAS) += stub.o stub_segv.o + ptrace_user.o setjmp.o signal.o sigcontext.o stub.o stub_segv.o \ + syscalls.o sysrq.o sys_call_table.o tls.o subarch-obj-y = lib/bitops_32.o lib/semaphore_32.o lib/string_32.o subarch-obj-$(CONFIG_HIGHMEM) += mm/highmem_32.o @@ -13,11 +11,7 @@ USER_OBJS := bugs.o ptrace_user.o sigcontext.o fault.o USER_OBJS += user-offsets.s extra-y += user-offsets.s -extra-$(CONFIG_MODE_TT) += unmap.o - UNPROFILE_OBJS := stub_segv.o CFLAGS_stub_segv.o := $(CFLAGS_NO_HARDENING) include arch/um/scripts/Makefile.rules - -$(obj)/unmap.%: _c_flags = $(call unprofile,$(CFLAGS)) diff --git a/arch/um/sys-i386/ldt.c b/arch/um/sys-i386/ldt.c index a939a7ef022..762a12aec75 100644 --- a/arch/um/sys-i386/ldt.c +++ b/arch/um/sys-i386/ldt.c @@ -19,72 +19,6 @@ extern int modify_ldt(int func, void *ptr, unsigned long bytecount); -#ifdef CONFIG_MODE_TT - -static long do_modify_ldt_tt(int func, void __user *ptr, - unsigned long bytecount) -{ - struct user_desc info; - int res = 0; - void *buf = NULL; - void *p = NULL; /* What we pass to host. */ - - switch(func){ - case 1: - case 0x11: /* write_ldt */ - /* Do this check now to avoid overflows. */ - if (bytecount != sizeof(struct user_desc)) { - res = -EINVAL; - goto out; - } - - if(copy_from_user(&info, ptr, sizeof(info))) { - res = -EFAULT; - goto out; - } - - p = &info; - break; - case 0: - case 2: /* read_ldt */ - - /* The use of info avoids kmalloc on the write case, not on the - * read one. */ - buf = kmalloc(bytecount, GFP_KERNEL); - if (!buf) { - res = -ENOMEM; - goto out; - } - p = buf; - break; - default: - res = -ENOSYS; - goto out; - } - - res = modify_ldt(func, p, bytecount); - if(res < 0) - goto out; - - switch(func){ - case 0: - case 2: - /* Modify_ldt was for reading and returned the number of read - * bytes.*/ - if(copy_to_user(ptr, p, res)) - res = -EFAULT; - break; - } - -out: - kfree(buf); - return res; -} - -#endif - -#ifdef CONFIG_MODE_SKAS - #include "skas.h" #include "skas_ptrace.h" #include "asm/mmu_context.h" @@ -569,7 +503,6 @@ void free_ldt(struct mmu_context_skas * mm) } mm->ldt.entry_count = 0; } -#endif int sys_modify_ldt(int func, void __user *ptr, unsigned long bytecount) { diff --git a/arch/um/sys-i386/ptrace.c b/arch/um/sys-i386/ptrace.c index 28bf0115032..572fd504b94 100644 --- a/arch/um/sys-i386/ptrace.c +++ b/arch/um/sys-i386/ptrace.c @@ -14,12 +14,6 @@ #include "sysdep/sigcontext.h" #include "sysdep/sc.h" -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) { int err = arch_switch_tls_skas(from, to); @@ -233,79 +227,12 @@ static inline unsigned long twd_fxsr_to_i387( struct i387_fxsave_struct *fxsave return ret; } -/* - * FXSR floating point environment conversions. - */ - -#ifdef CONFIG_MODE_TT -static inline int convert_fxsr_to_user_tt(struct _fpstate __user *buf, - struct pt_regs *regs) -{ - struct i387_fxsave_struct *fxsave = SC_FXSR_ENV(PT_REGS_SC(regs)); - unsigned long env[7]; - struct _fpreg __user *to; - struct _fpxreg *from; - int i; - - env[0] = (unsigned long)fxsave->cwd | 0xffff0000; - env[1] = (unsigned long)fxsave->swd | 0xffff0000; - env[2] = twd_fxsr_to_i387(fxsave); - env[3] = fxsave->fip; - env[4] = fxsave->fcs | ((unsigned long)fxsave->fop << 16); - env[5] = fxsave->foo; - env[6] = fxsave->fos; - - if ( __copy_to_user( buf, env, 7 * sizeof(unsigned long) ) ) - return 1; - - to = &buf->_st[0]; - from = (struct _fpxreg *) &fxsave->st_space[0]; - for ( i = 0 ; i < 8 ; i++, to++, from++ ) { - if ( __copy_to_user( to, from, sizeof(*to) ) ) - return 1; - } - return 0; -} -#endif - static inline int convert_fxsr_to_user(struct _fpstate __user *buf, struct pt_regs *regs) { return(CHOOSE_MODE(convert_fxsr_to_user_tt(buf, regs), 0)); } -#ifdef CONFIG_MODE_TT -static inline int convert_fxsr_from_user_tt(struct pt_regs *regs, - struct _fpstate __user *buf) -{ - struct i387_fxsave_struct *fxsave = SC_FXSR_ENV(PT_REGS_SC(regs)); - unsigned long env[7]; - struct _fpxreg *to; - struct _fpreg __user *from; - int i; - - if ( __copy_from_user( env, buf, 7 * sizeof(long) ) ) - return 1; - - fxsave->cwd = (unsigned short)(env[0] & 0xffff); - fxsave->swd = (unsigned short)(env[1] & 0xffff); - fxsave->twd = twd_i387_to_fxsr((unsigned short)(env[2] & 0xffff)); - fxsave->fip = env[3]; - fxsave->fop = (unsigned short)((env[4] & 0xffff0000) >> 16); - fxsave->fcs = (env[4] & 0xffff); - fxsave->foo = env[5]; - fxsave->fos = env[6]; - - to = (struct _fpxreg *) &fxsave->st_space[0]; - from = &buf->_st[0]; - for ( i = 0 ; i < 8 ; i++, to++, from++ ) { - if ( __copy_from_user( to, from, sizeof(*from) ) ) - return 1; - } - return 0; -} -#endif - static inline int convert_fxsr_from_user(struct pt_regs *regs, struct _fpstate __user *buf) { @@ -332,39 +259,11 @@ int set_fpregs(unsigned long buf, struct task_struct *child) else return(0); } -#ifdef CONFIG_MODE_TT -int get_fpxregs_tt(unsigned long buf, struct task_struct *tsk) -{ - struct pt_regs *regs = &tsk->thread.regs; - struct i387_fxsave_struct *fxsave = SC_FXSR_ENV(PT_REGS_SC(regs)); - int err; - - err = __copy_to_user((void __user *) buf, fxsave, - sizeof(struct user_fxsr_struct)); - if(err) return -EFAULT; - else return 0; -} -#endif - int get_fpxregs(unsigned long buf, struct task_struct *tsk) { return(CHOOSE_MODE(get_fpxregs_tt(buf, tsk), 0)); } -#ifdef CONFIG_MODE_TT -int set_fpxregs_tt(unsigned long buf, struct task_struct *tsk) -{ - struct pt_regs *regs = &tsk->thread.regs; - struct i387_fxsave_struct *fxsave = SC_FXSR_ENV(PT_REGS_SC(regs)); - int err; - - err = __copy_from_user(fxsave, (void __user *) buf, - sizeof(struct user_fxsr_struct) ); - if(err) return -EFAULT; - else return 0; -} -#endif - int set_fpxregs(unsigned long buf, struct task_struct *tsk) { return(CHOOSE_MODE(set_fpxregs_tt(buf, tsk), 0)); @@ -387,25 +286,6 @@ int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu) } #endif -#ifdef CONFIG_MODE_TT -static inline void copy_fpu_fxsave_tt(struct pt_regs *regs, - struct user_i387_struct *buf) -{ - struct i387_fxsave_struct *fpu = SC_FXSR_ENV(PT_REGS_SC(regs)); - unsigned short *to; - unsigned short *from; - int i; - - memcpy( buf, fpu, 7 * sizeof(long) ); - - to = (unsigned short *) &buf->st_space[0]; - from = (unsigned short *) &fpu->st_space[0]; - for ( i = 0 ; i < 8 ; i++, to += 5, from += 8 ) { - memcpy( to, from, 5 * sizeof(unsigned short) ); - } -} -#endif - static inline void copy_fpu_fxsave(struct pt_regs *regs, struct user_i387_struct *buf) { diff --git a/arch/um/sys-i386/ptrace_user.c b/arch/um/sys-i386/ptrace_user.c index 40ff0c831bd..b68dd230e64 100644 --- a/arch/um/sys-i386/ptrace_user.c +++ b/arch/um/sys-i386/ptrace_user.c @@ -43,89 +43,3 @@ int ptrace_setfpregs(long pid, unsigned long *regs) return -errno; return 0; } - -#ifdef UML_CONFIG_MODE_TT - -static void write_debugregs(int pid, unsigned long *regs) -{ - struct user *dummy; - int nregs, i; - - dummy = NULL; - nregs = ARRAY_SIZE(dummy->u_debugreg); - for(i = 0; i < nregs; i++){ - if((i == 4) || (i == 5)) continue; - if(ptrace(PTRACE_POKEUSR, pid, &dummy->u_debugreg[i], - regs[i]) < 0) - printk("write_debugregs - ptrace failed on " - "register %d, value = 0x%lx, errno = %d\n", i, - regs[i], errno); - } -} - -static void read_debugregs(int pid, unsigned long *regs) -{ - struct user *dummy; - int nregs, i; - - dummy = NULL; - nregs = ARRAY_SIZE(dummy->u_debugreg); - for(i = 0; i < nregs; i++){ - regs[i] = ptrace(PTRACE_PEEKUSR, pid, - &dummy->u_debugreg[i], 0); - } -} - -/* Accessed only by the tracing thread */ -static unsigned long kernel_debugregs[8] = { [ 0 ... 7 ] = 0 }; - -void arch_enter_kernel(void *task, int pid) -{ - read_debugregs(pid, TASK_DEBUGREGS(task)); - write_debugregs(pid, kernel_debugregs); -} - -void arch_leave_kernel(void *task, int pid) -{ - read_debugregs(pid, kernel_debugregs); - write_debugregs(pid, TASK_DEBUGREGS(task)); -} - -#ifdef UML_CONFIG_PT_PROXY -/* Accessed only by the tracing thread */ -static int debugregs_seq; - -/* Only called by the ptrace proxy */ -void ptrace_pokeuser(unsigned long addr, unsigned long data) -{ - if((addr < offsetof(struct user, u_debugreg[0])) || - (addr > offsetof(struct user, u_debugreg[7]))) - return; - addr -= offsetof(struct user, u_debugreg[0]); - addr = addr >> 2; - if(kernel_debugregs[addr] == data) return; - - kernel_debugregs[addr] = data; - debugregs_seq++; -} - -static void update_debugregs_cb(void *arg) -{ - int pid = *((int *) arg); - - write_debugregs(pid, kernel_debugregs); -} - -/* Optimized out in its header when not defined */ -void update_debugregs(int seq) -{ - int me; - - if(seq == debugregs_seq) return; - - me = os_getpid(); - initial_thread_cb(update_debugregs_cb, &me); -} -#endif - -#endif diff --git a/arch/um/sys-i386/signal.c b/arch/um/sys-i386/signal.c index 1cbf95f6858..187ea27536b 100644 --- a/arch/um/sys-i386/signal.c +++ b/arch/um/sys-i386/signal.c @@ -13,9 +13,6 @@ #include "sigcontext.h" #include "registers.h" #include "mode.h" - -#ifdef CONFIG_MODE_SKAS - #include "skas.h" void copy_sc(union uml_pt_regs *regs, void *from) @@ -108,61 +105,6 @@ int copy_sc_to_user_skas(struct sigcontext __user *to, struct _fpstate __user *t return copy_to_user(to, &sc, sizeof(sc)) || copy_to_user(to_fp, fpregs, sizeof(fpregs)); } -#endif - -#ifdef CONFIG_MODE_TT - -/* These copy a sigcontext to/from userspace. They copy the fpstate pointer, - * blowing away the old, good one. So, that value is saved, and then restored - * after the sigcontext copy. In copy_from, the variable holding the saved - * fpstate pointer, and the sigcontext that it should be restored to are both - * in the kernel, so we can just restore using an assignment. In copy_to, the - * saved pointer is in the kernel, but the sigcontext is in userspace, so we - * copy_to_user it. - */ -int copy_sc_from_user_tt(struct sigcontext *to, struct sigcontext __user *from, - int fpsize) -{ - struct _fpstate *to_fp; - struct _fpstate __user *from_fp; - unsigned long sigs; - int err; - - to_fp = to->fpstate; - sigs = to->oldmask; - err = copy_from_user(to, from, sizeof(*to)); - from_fp = to->fpstate; - to->oldmask = sigs; - to->fpstate = to_fp; - if(to_fp != NULL) - err |= copy_from_user(to_fp, from_fp, fpsize); - return err; -} - -int copy_sc_to_user_tt(struct sigcontext __user *to, struct _fpstate __user *fp, - struct sigcontext *from, int fpsize, unsigned long sp) -{ - struct _fpstate __user *to_fp; - struct _fpstate *from_fp; - int err; - - to_fp = (fp ? fp : (struct _fpstate __user *) (to + 1)); - from_fp = from->fpstate; - err = copy_to_user(to, from, sizeof(*to)); - - /* The SP in the sigcontext is the updated one for the signal - * delivery. The sp passed in is the original, and this needs - * to be restored, so we stick it in separately. - */ - err |= copy_to_user(&SC_SP(to), &sp, sizeof(sp)); - - if(from_fp != NULL){ - err |= copy_to_user(&to->fpstate, &to_fp, sizeof(to->fpstate)); - err |= copy_to_user(to_fp, from_fp, fpsize); - } - return err; -} -#endif static int copy_sc_from_user(struct pt_regs *to, void __user *from) { diff --git a/arch/um/sys-i386/tls.c b/arch/um/sys-i386/tls.c index fea8e5e15cc..0340b96d101 100644 --- a/arch/um/sys-i386/tls.c +++ b/arch/um/sys-i386/tls.c @@ -18,10 +18,7 @@ #include "mode_kern.h" #include "os.h" #include "mode.h" - -#ifdef CONFIG_MODE_SKAS #include "skas.h" -#endif /* * If needed we can detect when it's uninitialized. @@ -31,7 +28,6 @@ static int host_supports_tls = -1; int host_gdt_entry_tls_min; -#ifdef CONFIG_MODE_SKAS int do_set_thread_area_skas(struct user_desc *info) { int ret; @@ -53,7 +49,6 @@ int do_get_thread_area_skas(struct user_desc *info) put_cpu(); return ret; } -#endif /* * sys_get_thread_area: get a yet unused TLS descriptor index. @@ -187,17 +182,6 @@ int arch_switch_tls_skas(struct task_struct *from, struct task_struct *to) return 0; } -int arch_switch_tls_tt(struct task_struct *from, struct task_struct *to) -{ - if (!host_supports_tls) - return 0; - - 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) { diff --git a/arch/um/sys-i386/unmap.c b/arch/um/sys-i386/unmap.c deleted file mode 100644 index 1b0ad0e4adc..00000000000 --- a/arch/um/sys-i386/unmap.c +++ /dev/null @@ -1,25 +0,0 @@ -/* - * Copyright (C) 2000 Jeff Dike (jdike@karaya.com) - * Licensed under the GPL - */ - -#include <linux/mman.h> -#include <asm/unistd.h> - -static int errno; - -static inline _syscall2(int,munmap,void *,start,size_t,len) -static inline _syscall6(void *,mmap2,void *,addr,size_t,len,int,prot,int,flags,int,fd,off_t,offset) -int switcheroo(int fd, int prot, void *from, void *to, int size) -{ - if(munmap(to, size) < 0){ - return(-1); - } - if(mmap2(to, size, prot, MAP_SHARED | MAP_FIXED, fd, 0) == (void*) -1 ){ - return(-1); - } - if(munmap(from, size) < 0){ - return(-1); - } - return(0); -} |