| 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 | |