1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_X86_UNWIND_USER_H 3 #define _ASM_X86_UNWIND_USER_H 4 5 #include <asm/ptrace.h> 6 7 #define ARCH_INIT_USER_FP_FRAME(ws) \ 8 .cfa_off = 2*(ws), \ 9 .ra_off = -1*(ws), \ 10 .fp_off = -2*(ws), \ 11 .use_fp = true, 12 13 static inline int unwind_user_word_size(struct pt_regs *regs) 14 { 15 /* We can't unwind VM86 stacks */ 16 if (regs->flags & X86_VM_MASK) 17 return 0; 18 #ifdef CONFIG_X86_64 19 if (!user_64bit_mode(regs)) 20 return sizeof(int); 21 #endif 22 return sizeof(long); 23 } 24 25 #endif /* _ASM_X86_UNWIND_USER_H */ 26