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 #include <asm/uprobes.h> 7 8 #define ARCH_INIT_USER_FP_FRAME(ws) \ 9 .cfa_off = 2*(ws), \ 10 .ra_off = -1*(ws), \ 11 .fp_off = -2*(ws), \ 12 .use_fp = true, 13 14 #define ARCH_INIT_USER_FP_ENTRY_FRAME(ws) \ 15 .cfa_off = 1*(ws), \ 16 .ra_off = -1*(ws), \ 17 .fp_off = 0, \ 18 .use_fp = false, 19 20 static inline int unwind_user_word_size(struct pt_regs *regs) 21 { 22 /* We can't unwind VM86 stacks */ 23 if (regs->flags & X86_VM_MASK) 24 return 0; 25 #ifdef CONFIG_X86_64 26 if (!user_64bit_mode(regs)) 27 return sizeof(int); 28 #endif 29 return sizeof(long); 30 } 31 32 static inline bool unwind_user_at_function_start(struct pt_regs *regs) 33 { 34 return is_uprobe_at_func_entry(regs); 35 } 36 37 #endif /* _ASM_X86_UNWIND_USER_H */ 38