mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-25 21:54:06 +08:00
77f2878b4f
x86 32-bit isn't saving the stack pointer to pt_regs->esp when an interrupt occurs. Signed-off-by: Jan Blunck <jblunck@suse.de> Tested-by: Robert Fitzsimons <robfitz@273k.net> Cc: Andi Kleen <ak@suse.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Philippe Elie <phil.el@wanadoo.fr> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
143 lines
3.4 KiB
C
143 lines
3.4 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. */
|
|
|
|
struct pt_regs {
|
|
long ebx;
|
|
long ecx;
|
|
long edx;
|
|
long esi;
|
|
long edi;
|
|
long ebp;
|
|
long eax;
|
|
int xds;
|
|
int xes;
|
|
int xfs;
|
|
/* int xgs; */
|
|
long orig_eax;
|
|
long eip;
|
|
int xcs;
|
|
long eflags;
|
|
long esp;
|
|
int xss;
|
|
};
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#include <asm/vm86.h>
|
|
#include <asm/segment.h>
|
|
|
|
struct task_struct;
|
|
extern void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs, int error_code);
|
|
|
|
/*
|
|
* 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)
|
|
{
|
|
return (regs->xcs & SEGMENT_RPL_MASK) == USER_RPL;
|
|
}
|
|
static inline int user_mode_vm(struct pt_regs *regs)
|
|
{
|
|
return ((regs->xcs & SEGMENT_RPL_MASK) | (regs->eflags & VM_MASK)) >= USER_RPL;
|
|
}
|
|
static inline int v8086_mode(struct pt_regs *regs)
|
|
{
|
|
return (regs->eflags & VM_MASK);
|
|
}
|
|
|
|
#define instruction_pointer(regs) ((regs)->eip)
|
|
#define frame_pointer(regs) ((regs)->ebp)
|
|
#define stack_pointer(regs) ((unsigned long)(regs))
|
|
#define regs_return_value(regs) ((regs)->eax)
|
|
|
|
extern unsigned long profile_pc(struct pt_regs *regs);
|
|
#endif /* __KERNEL__ */
|
|
|
|
#else /* __i386__ */
|
|
|
|
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 */
|
|
};
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#define user_mode(regs) (!!((regs)->cs & 3))
|
|
#define user_mode_vm(regs) user_mode(regs)
|
|
#define instruction_pointer(regs) ((regs)->rip)
|
|
#define frame_pointer(regs) ((regs)->rbp)
|
|
#define stack_pointer(regs) ((regs)->rsp)
|
|
#define regs_return_value(regs) ((regs)->rax)
|
|
|
|
extern unsigned long profile_pc(struct pt_regs *regs);
|
|
void signal_fault(struct pt_regs *regs, void __user *frame, char *where);
|
|
|
|
struct task_struct;
|
|
|
|
extern unsigned long
|
|
convert_rip_to_linear(struct task_struct *child, struct pt_regs *regs);
|
|
|
|
enum {
|
|
EF_CF = 0x00000001,
|
|
EF_PF = 0x00000004,
|
|
EF_AF = 0x00000010,
|
|
EF_ZF = 0x00000040,
|
|
EF_SF = 0x00000080,
|
|
EF_TF = 0x00000100,
|
|
EF_IE = 0x00000200,
|
|
EF_DF = 0x00000400,
|
|
EF_OF = 0x00000800,
|
|
EF_IOPL = 0x00003000,
|
|
EF_IOPL_RING0 = 0x00000000,
|
|
EF_IOPL_RING1 = 0x00001000,
|
|
EF_IOPL_RING2 = 0x00002000,
|
|
EF_NT = 0x00004000, /* nested task */
|
|
EF_RF = 0x00010000, /* resume */
|
|
EF_VM = 0x00020000, /* virtual mode */
|
|
EF_AC = 0x00040000, /* alignment */
|
|
EF_VIF = 0x00080000, /* virtual interrupt */
|
|
EF_VIP = 0x00100000, /* virtual interrupt pending */
|
|
EF_ID = 0x00200000, /* id */
|
|
};
|
|
#endif /* __KERNEL__ */
|
|
#endif /* !__i386__ */
|
|
#endif /* !__ASSEMBLY__ */
|
|
|
|
#endif
|