1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_X86_UNWIND_USER_H 3 #define _ASM_X86_UNWIND_USER_H 4 5 #ifdef CONFIG_UNWIND_USER 6 7 #include <asm/ptrace.h> 8 #include <asm/uprobes.h> 9 10 static inline int unwind_user_word_size(struct pt_regs *regs) 11 { 12 /* We can't unwind VM86 stacks */ 13 if (regs->flags & X86_VM_MASK) 14 return 0; 15 return user_64bit_mode(regs) ? 8 : 4; 16 } 17 18 #endif /* CONFIG_UNWIND_USER */ 19 20 #ifdef CONFIG_HAVE_UNWIND_USER_FP 21 22 #define ARCH_INIT_USER_FP_FRAME(ws) \ 23 .cfa_off = 2*(ws), \ 24 .ra_off = -1*(ws), \ 25 .fp_off = -2*(ws), \ 26 .use_fp = true, 27 28 #define ARCH_INIT_USER_FP_ENTRY_FRAME(ws) \ 29 .cfa_off = 1*(ws), \ 30 .ra_off = -1*(ws), \ 31 .fp_off = 0, \ 32 .use_fp = false, 33 34 static inline bool unwind_user_at_function_start(struct pt_regs *regs) 35 { 36 return is_uprobe_at_func_entry(regs); 37 } 38 #define unwind_user_at_function_start unwind_user_at_function_start 39 40 #endif /* CONFIG_HAVE_UNWIND_USER_FP */ 41 42 #endif /* _ASM_X86_UNWIND_USER_H */ 43