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Commit 0700ed07 authored by Max Filippov's avatar Max Filippov
Browse files

xtensa: move internal ptrace definitions from uapi/asm to asm 



Stack frame layout diagram, kernel stack size and exception_handlers
offsets are used by the kernel and are not supposed to be accessible to
userspace. Move these definitions from uapi/asm/ptrace.h to asm/ptrace.h

Signed-off-by: default avatarMax Filippov <jcmvbkbc@gmail.com>
parent 1b47a683

arch/xtensa/include/asm/ptrace.h

+39 −0
Original line number Diff line number Diff line
@@ -12,6 +12,45 @@ 


#include <uapi/asm/ptrace.h>



/*

 * Kernel stack

 *

 *		+-----------------------+  -------- STACK_SIZE

 *		|     register file     |  |

 *		+-----------------------+  |

 *		|    struct pt_regs     |  |

 *		+-----------------------+  | ------ PT_REGS_OFFSET

 * double	:  16 bytes spill area  :  |  ^

 * excetion	:- - - - - - - - - - - -:  |  |

 * frame	:    struct pt_regs     :  |  |

 *		:- - - - - - - - - - - -:  |  |

 *		|                       |  |  |

 *		|     memory stack      |  |  |

 *		|                       |  |  |

 *		~                       ~  ~  ~

 *		~                       ~  ~  ~

 *		|                       |  |  |

 *		|                       |  |  |

 *		+-----------------------+  |  | --- STACK_BIAS

 *		|  struct task_struct   |  |  |  ^

 *  current --> +-----------------------+  |  |  |

 *		|  struct thread_info   |  |  |  |

 *		+-----------------------+ --------

 */



#define KERNEL_STACK_SIZE (2 * PAGE_SIZE)



/*  Offsets for exception_handlers[] (3 x 64-entries x 4-byte tables). */



#define EXC_TABLE_KSTK		0x004	/* Kernel Stack */

#define EXC_TABLE_DOUBLE_SAVE	0x008	/* Double exception save area for a0 */

#define EXC_TABLE_FIXUP		0x00c	/* Fixup handler */

#define EXC_TABLE_PARAM		0x010	/* For passing a parameter to fixup */

#define EXC_TABLE_SYSCALL_SAVE	0x014	/* For fast syscall handler */

#define EXC_TABLE_FAST_USER	0x100	/* Fast user exception handler */

#define EXC_TABLE_FAST_KERNEL	0x200	/* Fast kernel exception handler */

#define EXC_TABLE_DEFAULT	0x300	/* Default C-Handler */

#define EXC_TABLE_SIZE		0x400



#ifndef __ASSEMBLY__

arch/xtensa/include/uapi/asm/ptrace.h

+0 −40
Original line number Diff line number Diff line
@@ -11,46 +11,6 @@ 
#ifndef _UAPI_XTENSA_PTRACE_H

#define _UAPI_XTENSA_PTRACE_H



/*

 * Kernel stack

 *

 * 		+-----------------------+  -------- STACK_SIZE

 * 		|     register file     |  |

 * 		+-----------------------+  |

 * 		|    struct pt_regs     |  |

 * 		+-----------------------+  | ------ PT_REGS_OFFSET

 * double 	:  16 bytes spill area  :  |  ^

 * excetion 	:- - - - - - - - - - - -:  |  |

 * frame	:    struct pt_regs     :  |  |

 * 		:- - - - - - - - - - - -:  |  |

 * 		|                       |  |  |

 * 		|     memory stack      |  |  |

 * 		|                       |  |  |

 * 		~                       ~  ~  ~

 * 		~                       ~  ~  ~

 * 		|                       |  |  |

 * 		|                       |  |  |

 * 		+-----------------------+  |  | --- STACK_BIAS

 * 		|  struct task_struct   |  |  |  ^

 *  current --> +-----------------------+  |  |  |

 * 		|  struct thread_info   |  |  |  |

 *		+-----------------------+ --------

 */



#define KERNEL_STACK_SIZE (2 * PAGE_SIZE)



/*  Offsets for exception_handlers[] (3 x 64-entries x 4-byte tables). */



#define EXC_TABLE_KSTK		0x004	/* Kernel Stack */

#define EXC_TABLE_DOUBLE_SAVE	0x008	/* Double exception save area for a0 */

#define EXC_TABLE_FIXUP		0x00c	/* Fixup handler */

#define EXC_TABLE_PARAM		0x010	/* For passing a parameter to fixup */

#define EXC_TABLE_SYSCALL_SAVE	0x014	/* For fast syscall handler */

#define EXC_TABLE_FAST_USER	0x100	/* Fast user exception handler */

#define EXC_TABLE_FAST_KERNEL	0x200	/* Fast kernel exception handler */

#define EXC_TABLE_DEFAULT	0x300	/* Default C-Handler */

#define EXC_TABLE_SIZE		0x400



/* Registers used by strace */



#define REG_A_BASE	0x0000