arch/riscv/include/asm/ptrace.h

Source file repositories/reference/linux-study-clean/arch/riscv/include/asm/ptrace.h

File Facts

System
Linux kernel
Corpus path
arch/riscv/include/asm/ptrace.h
Extension
.h
Size
4416 bytes
Lines
186
Domain
Architecture Layer
Bucket
arch/riscv
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

struct pt_regs {
	unsigned long epc;
	unsigned long ra;
	unsigned long sp;
	unsigned long gp;
	unsigned long tp;
	unsigned long t0;
	unsigned long t1;
	unsigned long t2;
	unsigned long s0;
	unsigned long s1;
	struct_group(a_regs,
		unsigned long a0;
		unsigned long a1;
		unsigned long a2;
		unsigned long a3;
		unsigned long a4;
		unsigned long a5;
		unsigned long a6;
		unsigned long a7;
	);
	unsigned long s2;
	unsigned long s3;
	unsigned long s4;
	unsigned long s5;
	unsigned long s6;
	unsigned long s7;
	unsigned long s8;
	unsigned long s9;
	unsigned long s10;
	unsigned long s11;
	unsigned long t3;
	unsigned long t4;
	unsigned long t5;
	unsigned long t6;
	/* Supervisor/Machine CSRs */
	unsigned long status;
	unsigned long badaddr;
	unsigned long cause;
	/* a0 value before the syscall */
	unsigned long orig_a0;
};

#define PTRACE_SYSEMU			0x1f
#define PTRACE_SYSEMU_SINGLESTEP	0x20

#ifdef CONFIG_64BIT
#define REG_FMT "%016lx"
#else
#define REG_FMT "%08lx"
#endif

#define user_mode(regs) (((regs)->status & SR_PP) == 0)

#define MAX_REG_OFFSET offsetof(struct pt_regs, orig_a0)

/* Helpers for working with the instruction pointer */
static inline unsigned long instruction_pointer(struct pt_regs *regs)
{
	return regs->epc;
}
static inline void instruction_pointer_set(struct pt_regs *regs,
					   unsigned long val)
{
	regs->epc = val;
}

#define profile_pc(regs) instruction_pointer(regs)

/* Helpers for working with the user stack pointer */
static inline unsigned long user_stack_pointer(struct pt_regs *regs)
{
	return regs->sp;
}
static inline void user_stack_pointer_set(struct pt_regs *regs,
					  unsigned long val)
{
	regs->sp =  val;
}

/* Valid only for Kernel mode traps. */
static inline unsigned long kernel_stack_pointer(struct pt_regs *regs)
{
	return regs->sp;
}

/* Helpers for working with the frame pointer */
static inline unsigned long frame_pointer(struct pt_regs *regs)
{
	return regs->s0;

Annotation

Implementation Notes