^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) 1999, 2000 Niibe Yutaka
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) #ifndef __ASM_SH_PTRACE_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #define __ASM_SH_PTRACE_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/stringify.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/stddef.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/thread_info.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <asm/addrspace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <asm/page.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <uapi/asm/ptrace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #define user_mode(regs) (((regs)->sr & 0x40000000)==0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #define kernel_stack_pointer(_regs) ((unsigned long)(_regs)->regs[15])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) static inline unsigned long instruction_pointer(struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) return regs->pc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) static inline void instruction_pointer_set(struct pt_regs *regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) unsigned long val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) regs->pc = val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) static inline unsigned long frame_pointer(struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) return regs->regs[14];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) static inline unsigned long user_stack_pointer(struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) return regs->regs[15];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) static inline void user_stack_pointer_set(struct pt_regs *regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) unsigned long val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) regs->regs[15] = val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #define arch_has_single_step() (1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) * kprobe-based event tracer support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) struct pt_regs_offset {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) const char *name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) int offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #define REG_OFFSET_NAME(r) {.name = #r, .offset = offsetof(struct pt_regs, r)}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) #define REGS_OFFSET_NAME(num) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) {.name = __stringify(r##num), .offset = offsetof(struct pt_regs, regs[num])}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) #define TREGS_OFFSET_NAME(num) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) {.name = __stringify(tr##num), .offset = offsetof(struct pt_regs, tregs[num])}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) #define REG_OFFSET_END {.name = NULL, .offset = 0}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) /* Query offset/name of register from its name/offset */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) extern int regs_query_register_offset(const char *name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) extern const char *regs_query_register_name(unsigned int offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) extern const struct pt_regs_offset regoffset_table[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) * regs_get_register() - get register value from its offset
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) * @regs: pt_regs from which register value is gotten.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) * @offset: offset number of the register.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) * regs_get_register returns the value of a register. The @offset is the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) * offset of the register in struct pt_regs address which specified by @regs.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) * If @offset is bigger than MAX_REG_OFFSET, this returns 0.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) static inline unsigned long regs_get_register(struct pt_regs *regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) unsigned int offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) if (unlikely(offset > MAX_REG_OFFSET))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) return *(unsigned long *)((unsigned long)regs + offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) * regs_within_kernel_stack() - check the address in the stack
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) * @regs: pt_regs which contains kernel stack pointer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) * @addr: address which is checked.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) * regs_within_kernel_stack() checks @addr is within the kernel stack page(s).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) * If @addr is within the kernel stack, it returns true. If not, returns false.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) static inline int regs_within_kernel_stack(struct pt_regs *regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) unsigned long addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) return ((addr & ~(THREAD_SIZE - 1)) ==
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) (kernel_stack_pointer(regs) & ~(THREAD_SIZE - 1)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) * regs_get_kernel_stack_nth() - get Nth entry of the stack
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) * @regs: pt_regs which contains kernel stack pointer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) * @n: stack entry number.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) * regs_get_kernel_stack_nth() returns @n th entry of the kernel stack which
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) * is specified by @regs. If the @n th entry is NOT in the kernel stack,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) * this returns 0.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) static inline unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) unsigned int n)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) unsigned long *addr = (unsigned long *)kernel_stack_pointer(regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) addr += n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) if (regs_within_kernel_stack(regs, (unsigned long)addr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) return *addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) struct perf_event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) struct perf_sample_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) extern void ptrace_triggered(struct perf_event *bp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) struct perf_sample_data *data, struct pt_regs *regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) #define task_pt_regs(task) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) ((struct pt_regs *) (task_stack_page(task) + THREAD_SIZE) - 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) static inline unsigned long profile_pc(struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) unsigned long pc = regs->pc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) if (virt_addr_uncached(pc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) return CAC_ADDR(pc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) return pc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) #endif /* __ASM_SH_PTRACE_H */
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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