f6e8e28410
Choose a less generic name for such a special case. Add a comment explaining the odd use in X86_32. Change the one user of stack_pointer. Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
234 lines
4.7 KiB
C
234 lines
4.7 KiB
C
#ifndef _ASM_X86_PTRACE_H
|
|
#define _ASM_X86_PTRACE_H
|
|
|
|
#include <linux/compiler.h> /* For __user */
|
|
#include <asm/ptrace-abi.h>
|
|
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#ifdef __i386__
|
|
/* this struct defines the way the registers are stored on the
|
|
stack during a system call. */
|
|
|
|
#ifndef __KERNEL__
|
|
|
|
struct pt_regs {
|
|
long ebx;
|
|
long ecx;
|
|
long edx;
|
|
long esi;
|
|
long edi;
|
|
long ebp;
|
|
long eax;
|
|
int xds;
|
|
int xes;
|
|
int xfs;
|
|
/* int gs; */
|
|
long orig_eax;
|
|
long eip;
|
|
int xcs;
|
|
long eflags;
|
|
long esp;
|
|
int xss;
|
|
};
|
|
|
|
#else /* __KERNEL__ */
|
|
|
|
struct pt_regs {
|
|
long bx;
|
|
long cx;
|
|
long dx;
|
|
long si;
|
|
long di;
|
|
long bp;
|
|
long ax;
|
|
int ds;
|
|
int es;
|
|
int fs;
|
|
/* int gs; */
|
|
long orig_ax;
|
|
long ip;
|
|
int cs;
|
|
long flags;
|
|
long sp;
|
|
int ss;
|
|
};
|
|
|
|
#include <asm/vm86.h>
|
|
#include <asm/segment.h>
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#else /* __i386__ */
|
|
|
|
#ifndef __KERNEL__
|
|
|
|
struct pt_regs {
|
|
unsigned long r15;
|
|
unsigned long r14;
|
|
unsigned long r13;
|
|
unsigned long r12;
|
|
unsigned long rbp;
|
|
unsigned long rbx;
|
|
/* arguments: non interrupts/non tracing syscalls only save upto here*/
|
|
unsigned long r11;
|
|
unsigned long r10;
|
|
unsigned long r9;
|
|
unsigned long r8;
|
|
unsigned long rax;
|
|
unsigned long rcx;
|
|
unsigned long rdx;
|
|
unsigned long rsi;
|
|
unsigned long rdi;
|
|
unsigned long orig_rax;
|
|
/* end of arguments */
|
|
/* cpu exception frame or undefined */
|
|
unsigned long rip;
|
|
unsigned long cs;
|
|
unsigned long eflags;
|
|
unsigned long rsp;
|
|
unsigned long ss;
|
|
/* top of stack page */
|
|
};
|
|
|
|
#else /* __KERNEL__ */
|
|
|
|
struct pt_regs {
|
|
unsigned long r15;
|
|
unsigned long r14;
|
|
unsigned long r13;
|
|
unsigned long r12;
|
|
unsigned long bp;
|
|
unsigned long bx;
|
|
/* arguments: non interrupts/non tracing syscalls only save upto here*/
|
|
unsigned long r11;
|
|
unsigned long r10;
|
|
unsigned long r9;
|
|
unsigned long r8;
|
|
unsigned long ax;
|
|
unsigned long cx;
|
|
unsigned long dx;
|
|
unsigned long si;
|
|
unsigned long di;
|
|
unsigned long orig_ax;
|
|
/* end of arguments */
|
|
/* cpu exception frame or undefined */
|
|
unsigned long ip;
|
|
unsigned long cs;
|
|
unsigned long flags;
|
|
unsigned long sp;
|
|
unsigned long ss;
|
|
/* top of stack page */
|
|
};
|
|
|
|
#endif /* __KERNEL__ */
|
|
#endif /* !__i386__ */
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
/* the DS BTS struct is used for ptrace as well */
|
|
#include <asm/ds.h>
|
|
|
|
struct task_struct;
|
|
|
|
extern void ptrace_bts_take_timestamp(struct task_struct *, enum bts_qualifier);
|
|
|
|
extern unsigned long profile_pc(struct pt_regs *regs);
|
|
|
|
extern unsigned long
|
|
convert_ip_to_linear(struct task_struct *child, struct pt_regs *regs);
|
|
|
|
#ifdef CONFIG_X86_32
|
|
extern void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs, int error_code);
|
|
#else
|
|
void signal_fault(struct pt_regs *regs, void __user *frame, char *where);
|
|
#endif
|
|
|
|
#define regs_return_value(regs) ((regs)->ax)
|
|
|
|
/*
|
|
* user_mode_vm(regs) determines whether a register set came from user mode.
|
|
* This is true if V8086 mode was enabled OR if the register set was from
|
|
* protected mode with RPL-3 CS value. This tricky test checks that with
|
|
* one comparison. Many places in the kernel can bypass this full check
|
|
* if they have already ruled out V8086 mode, so user_mode(regs) can be used.
|
|
*/
|
|
static inline int user_mode(struct pt_regs *regs)
|
|
{
|
|
#ifdef CONFIG_X86_32
|
|
return (regs->cs & SEGMENT_RPL_MASK) == USER_RPL;
|
|
#else
|
|
return !!(regs->cs & 3);
|
|
#endif
|
|
}
|
|
|
|
static inline int user_mode_vm(struct pt_regs *regs)
|
|
{
|
|
#ifdef CONFIG_X86_32
|
|
return ((regs->cs & SEGMENT_RPL_MASK) |
|
|
(regs->flags & VM_MASK)) >= USER_RPL;
|
|
#else
|
|
return user_mode(regs);
|
|
#endif
|
|
}
|
|
|
|
static inline int v8086_mode(struct pt_regs *regs)
|
|
{
|
|
#ifdef CONFIG_X86_32
|
|
return (regs->flags & VM_MASK);
|
|
#else
|
|
return 0; /* No V86 mode support in long mode */
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* X86_32 CPUs don't save ss and esp if the CPU is already in kernel mode
|
|
* when it traps. So regs will be the current sp.
|
|
*
|
|
* This is valid only for kernel mode traps.
|
|
*/
|
|
static inline unsigned long kernel_trap_sp(struct pt_regs *regs)
|
|
{
|
|
#ifdef CONFIG_X86_32
|
|
return (unsigned long)regs;
|
|
#else
|
|
return regs->sp;
|
|
#endif
|
|
}
|
|
|
|
static inline unsigned long instruction_pointer(struct pt_regs *regs)
|
|
{
|
|
return regs->ip;
|
|
}
|
|
|
|
static inline unsigned long frame_pointer(struct pt_regs *regs)
|
|
{
|
|
return regs->bp;
|
|
}
|
|
|
|
/*
|
|
* These are defined as per linux/ptrace.h, which see.
|
|
*/
|
|
#define arch_has_single_step() (1)
|
|
extern void user_enable_single_step(struct task_struct *);
|
|
extern void user_disable_single_step(struct task_struct *);
|
|
|
|
extern void user_enable_block_step(struct task_struct *);
|
|
#ifdef CONFIG_X86_DEBUGCTLMSR
|
|
#define arch_has_block_step() (1)
|
|
#else
|
|
#define arch_has_block_step() (boot_cpu_data.x86 >= 6)
|
|
#endif
|
|
|
|
struct user_desc;
|
|
extern int do_get_thread_area(struct task_struct *p, int idx,
|
|
struct user_desc __user *info);
|
|
extern int do_set_thread_area(struct task_struct *p, int idx,
|
|
struct user_desc __user *info, int can_allocate);
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* !__ASSEMBLY__ */
|
|
|
|
#endif
|