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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_UNWIND_USER_H
#define _ASM_X86_UNWIND_USER_H
#ifdef CONFIG_UNWIND_USER
#include <asm/ptrace.h>
#include <asm/uprobes.h>
static inline int unwind_user_word_size(struct pt_regs *regs)
{
/* We can't unwind VM86 stacks */
if (regs->flags & X86_VM_MASK)
return 0;
return user_64bit_mode(regs) ? 8 : 4;
}
#endif /* CONFIG_UNWIND_USER */
#ifdef CONFIG_HAVE_UNWIND_USER_FP
#define ARCH_INIT_USER_FP_FRAME(ws) \
.cfa_off = 2*(ws), \
.ra_off = -1*(ws), \
.fp_off = -2*(ws), \
.use_fp = true,
#define ARCH_INIT_USER_FP_ENTRY_FRAME(ws) \
.cfa_off = 1*(ws), \
.ra_off = -1*(ws), \
.fp_off = 0, \
.use_fp = false,
static inline bool unwind_user_at_function_start(struct pt_regs *regs)
{
return is_uprobe_at_func_entry(regs);
}
#define unwind_user_at_function_start unwind_user_at_function_start
#endif /* CONFIG_HAVE_UNWIND_USER_FP */
#endif /* _ASM_X86_UNWIND_USER_H */
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