56 lines
1.8 KiB
C
56 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_SW64_PTRACE_H
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#define _ASM_SW64_PTRACE_H
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#include <uapi/asm/ptrace.h>
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#include <linux/sched/task_stack.h>
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#include <asm/hmcall.h>
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#include <asm/thread_info.h>
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#include <asm/processor.h>
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#include <asm/page.h>
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#define arch_has_single_step() (1)
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#define user_mode(regs) (((regs)->ps & 8) != 0)
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#define instruction_pointer(regs) ((regs)->pc)
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#define profile_pc(regs) instruction_pointer(regs)
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#define current_user_stack_pointer() rdusp()
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#define user_stack_pointer(regs) rdusp()
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#define kernel_stack_pointer(regs) (((regs->ps) >> 4) & (TASK_SIZE - 1))
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#define instruction_pointer_set(regs, val) ((regs)->pc = val)
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#define task_pt_regs(task) \
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((struct pt_regs *) (task_stack_page(task) + 2 * PAGE_SIZE) - 1)
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#define current_pt_regs() \
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((struct pt_regs *) ((char *)current_thread_info() + 2 * PAGE_SIZE) - 1)
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#define signal_pt_regs current_pt_regs
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#define force_successful_syscall_return() (current_pt_regs()->r0 = 0)
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#define MAX_REG_OFFSET (offsetof(struct pt_regs, r18))
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/**
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* regs_get_register() - get register value from its offset
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* @regs: pt_regs from which register value is gotten
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* @offset: offset of the register.
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*
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* regs_get_register returns the value of a register whose offset from @regs.
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* The @offset is the offset of the register in struct pt_regs.
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* If @offset is bigger than MAX_REG_OFFSET, this returns 0.
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*/
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static inline u64 regs_get_register(struct pt_regs *regs, unsigned int offset)
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{
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if (unlikely(offset > MAX_REG_OFFSET))
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return 0;
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return *(unsigned long *)((unsigned long)regs + offset);
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}
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extern int regs_query_register_offset(const char *name);
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extern unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs,
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unsigned int n);
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static inline unsigned long regs_return_value(struct pt_regs *regs)
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{
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return regs->r0;
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}
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#endif
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