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