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_HAVE_UNWIND_USER_FP 6 7 #include <asm/ptrace.h> 8 #include <asm/uprobes.h> 9 10 #define ARCH_INIT_USER_FP_FRAME(ws) \ 11 .cfa_off = 2*(ws), \ 12 .ra_off = -1*(ws), \ 13 .fp_off = -2*(ws), \ 14 .use_fp = true, 15 16 #define ARCH_INIT_USER_FP_ENTRY_FRAME(ws) \ 17 .cfa_off = 1*(ws), \ 18 .ra_off = -1*(ws), \ 19 .fp_off = 0, \ 20 .use_fp = false, 21 22 static inline int unwind_user_word_size(struct pt_regs *regs) 23 { 24 /* We can't unwind VM86 stacks */ 25 if (regs->flags & X86_VM_MASK) 26 return 0; 27 #ifdef CONFIG_X86_64 28 if (!user_64bit_mode(regs)) 29 return sizeof(int); 30 #endif 31 return sizeof(long); 32 } 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 39 #endif /* CONFIG_HAVE_UNWIND_USER_FP */ 40 41 #endif /* _ASM_X86_UNWIND_USER_H */ 42