-/*
- * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
+/*
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Licensed under the GPL
*/
-#include <linux/compiler.h>
-#include "linux/sched.h"
#include "linux/mm.h"
-#include "asm/elf.h"
-#include "asm/ptrace.h"
+#include "linux/sched.h"
#include "asm/uaccess.h"
-#include "asm/unistd.h"
-#include "sysdep/ptrace.h"
-#include "sysdep/sigcontext.h"
-#include "sysdep/sc.h"
+#include "skas.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);
-}
+extern int arch_switch_tls(struct task_struct *from, struct task_struct *to);
-void arch_switch_to_skas(struct task_struct *from, struct task_struct *to)
+void arch_switch_to(struct task_struct *from, struct task_struct *to)
{
- int err = arch_switch_tls_skas(from, to);
+ int err = arch_switch_tls(from, to);
if (!err)
return;
if (err != -EINVAL)
- printk(KERN_WARNING "arch_switch_tls_skas failed, errno %d, not EINVAL\n", -err);
+ printk(KERN_WARNING "arch_switch_tls failed, errno %d, "
+ "not EINVAL\n", -err);
else
- printk(KERN_WARNING "arch_switch_tls_skas failed, errno = EINVAL\n");
+ printk(KERN_WARNING "arch_switch_tls failed, errno = EINVAL\n");
}
int is_syscall(unsigned long addr)
int n;
n = copy_from_user(&instr, (void __user *) addr, sizeof(instr));
- if(n){
+ if (n) {
/* access_process_vm() grants access to vsyscall and stub,
* while copy_from_user doesn't. Maybe access_process_vm is
* slow, but that doesn't matter, since it will be called only
* in case of singlestepping, if copy_from_user failed.
*/
n = access_process_vm(current, addr, &instr, sizeof(instr), 0);
- if(n != sizeof(instr)) {
- printk("is_syscall : failed to read instruction from "
- "0x%lx\n", addr);
- return(1);
+ if (n != sizeof(instr)) {
+ printk(KERN_ERR "is_syscall : failed to read "
+ "instruction from 0x%lx\n", addr);
+ return 1;
}
}
/* int 0x80 or sysenter */
- return((instr == 0x80cd) || (instr == 0x340f));
+ return (instr == 0x80cd) || (instr == 0x340f);
}
/* determines which flags the user has access to. */
int poke_user(struct task_struct *child, long addr, long data)
{
- if ((addr & 3) || addr < 0)
- return -EIO;
-
- if (addr < MAX_REG_OFFSET)
- return putreg(child, addr, data);
+ if ((addr & 3) || addr < 0)
+ return -EIO;
- else if((addr >= offsetof(struct user, u_debugreg[0])) &&
- (addr <= offsetof(struct user, u_debugreg[7]))){
- addr -= offsetof(struct user, u_debugreg[0]);
- addr = addr >> 2;
- if((addr == 4) || (addr == 5)) return -EIO;
- child->thread.arch.debugregs[addr] = data;
- return 0;
- }
- return -EIO;
+ if (addr < MAX_REG_OFFSET)
+ return putreg(child, addr, data);
+ else if ((addr >= offsetof(struct user, u_debugreg[0])) &&
+ (addr <= offsetof(struct user, u_debugreg[7]))) {
+ addr -= offsetof(struct user, u_debugreg[0]);
+ addr = addr >> 2;
+ if ((addr == 4) || (addr == 5))
+ return -EIO;
+ child->thread.arch.debugregs[addr] = data;
+ return 0;
+ }
+ return -EIO;
}
unsigned long getreg(struct task_struct *child, int regno)
return retval;
}
+/* read the word at location addr in the USER area. */
int peek_user(struct task_struct *child, long addr, long data)
{
-/* read the word at location addr in the USER area. */
unsigned long tmp;
if ((addr & 3) || addr < 0)
return -EIO;
tmp = 0; /* Default return condition */
- if(addr < MAX_REG_OFFSET){
+ if (addr < MAX_REG_OFFSET) {
tmp = getreg(child, addr);
}
- else if((addr >= offsetof(struct user, u_debugreg[0])) &&
- (addr <= offsetof(struct user, u_debugreg[7]))){
+ else if ((addr >= offsetof(struct user, u_debugreg[0])) &&
+ (addr <= offsetof(struct user, u_debugreg[7]))) {
addr -= offsetof(struct user, u_debugreg[0]);
addr = addr >> 2;
tmp = child->thread.arch.debugregs[addr];
return put_user(tmp, (unsigned long __user *) data);
}
-struct i387_fxsave_struct {
- unsigned short cwd;
- unsigned short swd;
- unsigned short twd;
- unsigned short fop;
- long fip;
- long fcs;
- long foo;
- long fos;
- long mxcsr;
- long reserved;
- long st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */
- long xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */
- long padding[56];
-};
-
-/*
- * FPU tag word conversions.
- */
-
-static inline unsigned short twd_i387_to_fxsr( unsigned short twd )
+int get_fpregs(struct user_i387_struct __user *buf, struct task_struct *child)
{
- unsigned int tmp; /* to avoid 16 bit prefixes in the code */
-
- /* Transform each pair of bits into 01 (valid) or 00 (empty) */
- tmp = ~twd;
- tmp = (tmp | (tmp>>1)) & 0x5555; /* 0V0V0V0V0V0V0V0V */
- /* and move the valid bits to the lower byte. */
- tmp = (tmp | (tmp >> 1)) & 0x3333; /* 00VV00VV00VV00VV */
- tmp = (tmp | (tmp >> 2)) & 0x0f0f; /* 0000VVVV0000VVVV */
- tmp = (tmp | (tmp >> 4)) & 0x00ff; /* 00000000VVVVVVVV */
- return tmp;
-}
+ int err, n, cpu = ((struct thread_info *) child->stack)->cpu;
+ long fpregs[HOST_FP_SIZE];
-static inline unsigned long twd_fxsr_to_i387( struct i387_fxsave_struct *fxsave )
-{
- struct _fpxreg *st = NULL;
- unsigned long twd = (unsigned long) fxsave->twd;
- unsigned long tag;
- unsigned long ret = 0xffff0000;
- int i;
+ BUG_ON(sizeof(*buf) != sizeof(fpregs));
+ err = save_fp_registers(userspace_pid[cpu], fpregs);
+ if (err)
+ return err;
-#define FPREG_ADDR(f, n) ((char *)&(f)->st_space + (n) * 16);
+ n = copy_to_user((void *) buf, fpregs, sizeof(fpregs));
+ if(n > 0)
+ return -EFAULT;
- for ( i = 0 ; i < 8 ; i++ ) {
- if ( twd & 0x1 ) {
- st = (struct _fpxreg *) FPREG_ADDR( fxsave, i );
-
- switch ( st->exponent & 0x7fff ) {
- case 0x7fff:
- tag = 2; /* Special */
- break;
- case 0x0000:
- if ( !st->significand[0] &&
- !st->significand[1] &&
- !st->significand[2] &&
- !st->significand[3] ) {
- tag = 1; /* Zero */
- } else {
- tag = 2; /* Special */
- }
- break;
- default:
- if ( st->significand[3] & 0x8000 ) {
- tag = 0; /* Valid */
- } else {
- tag = 2; /* Special */
- }
- break;
- }
- } else {
- tag = 3; /* Empty */
- }
- ret |= (tag << (2 * i));
- twd = twd >> 1;
- }
- return ret;
+ return n;
}
-/*
- * 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)
+int set_fpregs(struct user_i387_struct __user *buf, struct task_struct *child)
{
- 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;
+ int n, cpu = ((struct thread_info *) child->stack)->cpu;
+ long fpregs[HOST_FP_SIZE];
- 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;
+ BUG_ON(sizeof(*buf) != sizeof(fpregs));
+ n = copy_from_user(fpregs, (void *) buf, sizeof(fpregs));
+ if (n > 0)
+ return -EFAULT;
- 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;
+ return restore_fp_registers(userspace_pid[cpu], fpregs);
}
-#endif
-static inline int convert_fxsr_to_user(struct _fpstate __user *buf,
- struct pt_regs *regs)
+int get_fpxregs(struct user_fxsr_struct __user *buf, struct task_struct *child)
{
- return(CHOOSE_MODE(convert_fxsr_to_user_tt(buf, regs), 0));
-}
+ int err, n, cpu = ((struct thread_info *) child->stack)->cpu;
+ long fpregs[HOST_XFP_SIZE];
-#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;
+ BUG_ON(sizeof(*buf) != sizeof(fpregs));
+ err = save_fpx_registers(userspace_pid[cpu], fpregs);
+ if (err)
+ return err;
- 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];
+ n = copy_to_user((void *) buf, fpregs, sizeof(fpregs));
+ if(n > 0)
+ return -EFAULT;
- 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)
-{
- return(CHOOSE_MODE(convert_fxsr_from_user_tt(regs, buf), 0));
-}
-
-int get_fpregs(unsigned long buf, struct task_struct *child)
-{
- int err;
-
- err = convert_fxsr_to_user((struct _fpstate __user *) buf,
- &child->thread.regs);
- if(err) return(-EFAULT);
- else return(0);
-}
-
-int set_fpregs(unsigned long buf, struct task_struct *child)
-{
- int err;
-
- err = convert_fxsr_from_user(&child->thread.regs,
- (struct _fpstate __user *) buf);
- if(err) return(-EFAULT);
- 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));
-}
-
-#ifdef notdef
-int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu)
-{
- fpu->cwd = (((SC_FP_CW(PT_REGS_SC(regs)) & 0xffff) << 16) |
- (SC_FP_SW(PT_REGS_SC(regs)) & 0xffff));
- fpu->swd = SC_FP_CSSEL(PT_REGS_SC(regs)) & 0xffff;
- fpu->twd = SC_FP_IPOFF(PT_REGS_SC(regs));
- fpu->fip = SC_FP_CSSEL(PT_REGS_SC(regs)) & 0xffff;
- fpu->fcs = SC_FP_DATAOFF(PT_REGS_SC(regs));
- fpu->foo = SC_FP_DATASEL(PT_REGS_SC(regs));
- fpu->fos = 0;
- memcpy(fpu->st_space, (void *) SC_FP_ST(PT_REGS_SC(regs)),
- sizeof(fpu->st_space));
- return(1);
+ return n;
}
-#endif
-#ifdef CONFIG_MODE_TT
-static inline void copy_fpu_fxsave_tt(struct pt_regs *regs,
- struct user_i387_struct *buf)
+int set_fpxregs(struct user_fxsr_struct __user *buf, struct task_struct *child)
{
- struct i387_fxsave_struct *fpu = SC_FXSR_ENV(PT_REGS_SC(regs));
- unsigned short *to;
- unsigned short *from;
- int i;
+ int n, cpu = ((struct thread_info *) child->stack)->cpu;
+ long fpregs[HOST_XFP_SIZE];
- memcpy( buf, fpu, 7 * sizeof(long) );
+ BUG_ON(sizeof(*buf) != sizeof(fpregs));
+ n = copy_from_user(fpregs, (void *) buf, sizeof(fpregs));
+ if (n > 0)
+ return -EFAULT;
- 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) );
- }
+ return restore_fpx_registers(userspace_pid[cpu], fpregs);
}
-#endif
-static inline void copy_fpu_fxsave(struct pt_regs *regs,
- struct user_i387_struct *buf)
+long subarch_ptrace(struct task_struct *child, long request, long addr,
+ long data)
{
- (void) CHOOSE_MODE(copy_fpu_fxsave_tt(regs, buf), 0);
+ return -EIO;
}
-
-int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu )
-{
- copy_fpu_fxsave(regs, (struct user_i387_struct *) fpu);
- return(1);
-}
-
-/*
- * 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:
- */
git.openpandora.org / pandora-kernel.git / blobdiff