arch/sparc/include/asm/ptrace.h

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

File Facts

System
Linux kernel
Corpus path
arch/sparc/include/asm/ptrace.h
Extension
.h
Size
4240 bytes
Lines
163
Domain
Architecture Layer
Bucket
arch/sparc
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 global_reg_snapshot {
	unsigned long		tstate;
	unsigned long		tpc;
	unsigned long		tnpc;
	unsigned long		o7;
	unsigned long		i7;
	unsigned long		rpc;
	struct thread_info	*thread;
	unsigned long		pad1;
};

struct global_pmu_snapshot {
	unsigned long		pcr[4];
	unsigned long		pic[4];
};

union global_cpu_snapshot {
	struct global_reg_snapshot	reg;
	struct global_pmu_snapshot	pmu;
};

extern union global_cpu_snapshot global_cpu_snapshot[NR_CPUS];

#define force_successful_syscall_return() set_thread_noerror(1)
#define user_mode(regs) (!((regs)->tstate & TSTATE_PRIV))
#define instruction_pointer(regs) ((regs)->tpc)
#define instruction_pointer_set(regs, val) do { \
		(regs)->tpc = (val); \
		(regs)->tnpc = (val)+4; \
	} while (0)
#define user_stack_pointer(regs) ((regs)->u_regs[UREG_FP])
static inline int is_syscall_success(struct pt_regs *regs)
{
	return !(regs->tstate & (TSTATE_XCARRY | TSTATE_ICARRY));
}

static inline long regs_return_value(struct pt_regs *regs)
{
	return regs->u_regs[UREG_I0];
}
#ifdef CONFIG_SMP
unsigned long profile_pc(struct pt_regs *);
#else
#define profile_pc(regs) instruction_pointer(regs)
#endif

#define MAX_REG_OFFSET (offsetof(struct pt_regs, magic))

int regs_query_register_offset(const char *name);
unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs, unsigned int n);

/**
 * regs_get_register() - get register value from its offset
 * @regs:	pt_regs from which register value is gotten
 * @offset:	offset number of the register.
 *
 * regs_get_register returns the value of a register whose
 * offset from @regs. The @offset is the offset of the register
 * in struct pt_regs. If @offset is bigger than MAX_REG_OFFSET,
 * this returns 0.
 */
static inline unsigned long regs_get_register(struct pt_regs *regs,
					     unsigned long offset)
{
	if (unlikely(offset >= MAX_REG_OFFSET))
		return 0;
	if (offset == PT_V9_Y)
		return *(unsigned int *)((unsigned long)regs + offset);
	return *(unsigned long *)((unsigned long)regs + offset);
}

/* Valid only for Kernel mode traps. */
static inline unsigned long kernel_stack_pointer(struct pt_regs *regs)
{
	return regs->u_regs[UREG_I6];
}
#else /* __ASSEMBLER__ */
#endif /* __ASSEMBLER__ */
#else /* (defined(__sparc__) && defined(__arch64__)) */
#ifndef __ASSEMBLER__
#include <asm/switch_to.h>

static inline bool pt_regs_is_syscall(struct pt_regs *regs)
{
	return (regs->psr & PSR_SYSCALL);
}

static inline bool pt_regs_clear_syscall(struct pt_regs *regs)
{
	return (regs->psr &= ~PSR_SYSCALL);

Annotation

Implementation Notes