Orange Pi5 kernel

^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) // Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4) #ifndef __ASM_CSKY_PTRACE_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5) #define __ASM_CSKY_PTRACE_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) #include <uapi/asm/ptrace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <asm/traps.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/compiler.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #ifndef __ASSEMBLY__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #define PS_S	0x80000000 /* Supervisor Mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #define USR_BKPT	0x1464
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #define arch_has_single_step() (1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #define current_pt_regs() \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) ({ (struct pt_regs *)((char *)current_thread_info() + THREAD_SIZE) - 1; })
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #define user_stack_pointer(regs) ((regs)->usp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #define user_mode(regs) (!((regs)->sr & PS_S))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #define instruction_pointer(regs) ((regs)->pc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #define profile_pc(regs) instruction_pointer(regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #define trap_no(regs) ((regs->sr >> 16) & 0xff)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) static inline void instruction_pointer_set(struct pt_regs *regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 					   unsigned long val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	regs->pc = val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) #if defined(__CSKYABIV2__)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) #define MAX_REG_OFFSET offsetof(struct pt_regs, dcsr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) #define MAX_REG_OFFSET offsetof(struct pt_regs, regs[9])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) static inline bool in_syscall(struct pt_regs const *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	return ((regs->sr >> 16) & 0xff) == VEC_TRAP0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) static inline void forget_syscall(struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	regs->sr &= ~(0xff << 16);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) static inline unsigned long regs_return_value(struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	return regs->a0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) static inline void regs_set_return_value(struct pt_regs *regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 					 unsigned long val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	regs->a0 = val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) /* Valid only for Kernel mode traps. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) static inline unsigned long kernel_stack_pointer(struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	return regs->usp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) static inline unsigned long frame_pointer(struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	return regs->regs[4];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) static inline void frame_pointer_set(struct pt_regs *regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 				     unsigned long val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	regs->regs[4] = val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) extern int regs_query_register_offset(const char *name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) extern unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 						unsigned int n);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83)  * regs_get_register() - get register value from its offset
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84)  * @regs:      pt_regs from which register value is gotten
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85)  * @offset:    offset of the register.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87)  * regs_get_register returns the value of a register whose offset from @regs.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88)  * The @offset is the offset of the register in struct pt_regs.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89)  * If @offset is bigger than MAX_REG_OFFSET, this returns 0.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) static inline unsigned long regs_get_register(struct pt_regs *regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 						unsigned int offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	if (unlikely(offset > MAX_REG_OFFSET))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	return *(unsigned long *)((unsigned long)regs + offset);
^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) #endif /* __ASSEMBLY__ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) #endif /* __ASM_CSKY_PTRACE_H */