1*4882a593Smuzhiyun /* 2*4882a593Smuzhiyun * include/asm-xtensa/ptrace.h 3*4882a593Smuzhiyun * 4*4882a593Smuzhiyun * This file is subject to the terms and conditions of the GNU General Public 5*4882a593Smuzhiyun * License. See the file "COPYING" in the main directory of this archive 6*4882a593Smuzhiyun * for more details. 7*4882a593Smuzhiyun * 8*4882a593Smuzhiyun * Copyright (C) 2001 - 2005 Tensilica Inc. 9*4882a593Smuzhiyun */ 10*4882a593Smuzhiyun #ifndef _XTENSA_PTRACE_H 11*4882a593Smuzhiyun #define _XTENSA_PTRACE_H 12*4882a593Smuzhiyun 13*4882a593Smuzhiyun #include <asm/kmem_layout.h> 14*4882a593Smuzhiyun #include <uapi/asm/ptrace.h> 15*4882a593Smuzhiyun 16*4882a593Smuzhiyun /* 17*4882a593Smuzhiyun * Kernel stack 18*4882a593Smuzhiyun * 19*4882a593Smuzhiyun * +-----------------------+ -------- STACK_SIZE 20*4882a593Smuzhiyun * | register file | | 21*4882a593Smuzhiyun * +-----------------------+ | 22*4882a593Smuzhiyun * | struct pt_regs | | 23*4882a593Smuzhiyun * +-----------------------+ | ------ PT_REGS_OFFSET 24*4882a593Smuzhiyun * double : 16 bytes spill area : | ^ 25*4882a593Smuzhiyun * excetion :- - - - - - - - - - - -: | | 26*4882a593Smuzhiyun * frame : struct pt_regs : | | 27*4882a593Smuzhiyun * :- - - - - - - - - - - -: | | 28*4882a593Smuzhiyun * | | | | 29*4882a593Smuzhiyun * | memory stack | | | 30*4882a593Smuzhiyun * | | | | 31*4882a593Smuzhiyun * ~ ~ ~ ~ 32*4882a593Smuzhiyun * ~ ~ ~ ~ 33*4882a593Smuzhiyun * | | | | 34*4882a593Smuzhiyun * | | | | 35*4882a593Smuzhiyun * +-----------------------+ | | --- STACK_BIAS 36*4882a593Smuzhiyun * | struct task_struct | | | ^ 37*4882a593Smuzhiyun * current --> +-----------------------+ | | | 38*4882a593Smuzhiyun * | struct thread_info | | | | 39*4882a593Smuzhiyun * +-----------------------+ -------- 40*4882a593Smuzhiyun */ 41*4882a593Smuzhiyun 42*4882a593Smuzhiyun #define NO_SYSCALL (-1) 43*4882a593Smuzhiyun 44*4882a593Smuzhiyun #ifndef __ASSEMBLY__ 45*4882a593Smuzhiyun 46*4882a593Smuzhiyun #include <asm/coprocessor.h> 47*4882a593Smuzhiyun 48*4882a593Smuzhiyun /* 49*4882a593Smuzhiyun * This struct defines the way the registers are stored on the 50*4882a593Smuzhiyun * kernel stack during a system call or other kernel entry. 51*4882a593Smuzhiyun */ 52*4882a593Smuzhiyun struct pt_regs { 53*4882a593Smuzhiyun unsigned long pc; /* 4 */ 54*4882a593Smuzhiyun unsigned long ps; /* 8 */ 55*4882a593Smuzhiyun unsigned long depc; /* 12 */ 56*4882a593Smuzhiyun unsigned long exccause; /* 16 */ 57*4882a593Smuzhiyun unsigned long excvaddr; /* 20 */ 58*4882a593Smuzhiyun unsigned long debugcause; /* 24 */ 59*4882a593Smuzhiyun unsigned long wmask; /* 28 */ 60*4882a593Smuzhiyun unsigned long lbeg; /* 32 */ 61*4882a593Smuzhiyun unsigned long lend; /* 36 */ 62*4882a593Smuzhiyun unsigned long lcount; /* 40 */ 63*4882a593Smuzhiyun unsigned long sar; /* 44 */ 64*4882a593Smuzhiyun unsigned long windowbase; /* 48 */ 65*4882a593Smuzhiyun unsigned long windowstart; /* 52 */ 66*4882a593Smuzhiyun unsigned long syscall; /* 56 */ 67*4882a593Smuzhiyun unsigned long icountlevel; /* 60 */ 68*4882a593Smuzhiyun unsigned long scompare1; /* 64 */ 69*4882a593Smuzhiyun unsigned long threadptr; /* 68 */ 70*4882a593Smuzhiyun 71*4882a593Smuzhiyun /* Additional configurable registers that are used by the compiler. */ 72*4882a593Smuzhiyun xtregs_opt_t xtregs_opt; 73*4882a593Smuzhiyun 74*4882a593Smuzhiyun /* Make sure the areg field is 16 bytes aligned. */ 75*4882a593Smuzhiyun int align[0] __attribute__ ((aligned(16))); 76*4882a593Smuzhiyun 77*4882a593Smuzhiyun /* current register frame. 78*4882a593Smuzhiyun * Note: The ESF for kernel exceptions ends after 16 registers! 79*4882a593Smuzhiyun */ 80*4882a593Smuzhiyun unsigned long areg[16]; 81*4882a593Smuzhiyun }; 82*4882a593Smuzhiyun 83*4882a593Smuzhiyun #include <asm/core.h> 84*4882a593Smuzhiyun 85*4882a593Smuzhiyun # define arch_has_single_step() (1) 86*4882a593Smuzhiyun # define task_pt_regs(tsk) ((struct pt_regs*) \ 87*4882a593Smuzhiyun (task_stack_page(tsk) + KERNEL_STACK_SIZE - (XCHAL_NUM_AREGS-16)*4) - 1) 88*4882a593Smuzhiyun # define user_mode(regs) (((regs)->ps & 0x00000020)!=0) 89*4882a593Smuzhiyun # define instruction_pointer(regs) ((regs)->pc) 90*4882a593Smuzhiyun # define return_pointer(regs) (MAKE_PC_FROM_RA((regs)->areg[0], \ 91*4882a593Smuzhiyun (regs)->areg[1])) 92*4882a593Smuzhiyun 93*4882a593Smuzhiyun # ifndef CONFIG_SMP 94*4882a593Smuzhiyun # define profile_pc(regs) instruction_pointer(regs) 95*4882a593Smuzhiyun # else 96*4882a593Smuzhiyun # define profile_pc(regs) \ 97*4882a593Smuzhiyun ({ \ 98*4882a593Smuzhiyun in_lock_functions(instruction_pointer(regs)) ? \ 99*4882a593Smuzhiyun return_pointer(regs) : instruction_pointer(regs); \ 100*4882a593Smuzhiyun }) 101*4882a593Smuzhiyun # endif 102*4882a593Smuzhiyun 103*4882a593Smuzhiyun #define user_stack_pointer(regs) ((regs)->areg[1]) 104*4882a593Smuzhiyun regs_return_value(struct pt_regs * regs)105*4882a593Smuzhiyunstatic inline unsigned long regs_return_value(struct pt_regs *regs) 106*4882a593Smuzhiyun { 107*4882a593Smuzhiyun return regs->areg[2]; 108*4882a593Smuzhiyun } 109*4882a593Smuzhiyun 110*4882a593Smuzhiyun #else /* __ASSEMBLY__ */ 111*4882a593Smuzhiyun 112*4882a593Smuzhiyun # include <asm/asm-offsets.h> 113*4882a593Smuzhiyun #define PT_REGS_OFFSET (KERNEL_STACK_SIZE - PT_USER_SIZE) 114*4882a593Smuzhiyun 115*4882a593Smuzhiyun #endif /* !__ASSEMBLY__ */ 116*4882a593Smuzhiyun 117*4882a593Smuzhiyun #endif /* _XTENSA_PTRACE_H */ 118