arch/parisc/kernel/ptrace.c

Source file repositories/reference/linux-study-clean/arch/parisc/kernel/ptrace.c

File Facts

System
Linux kernel
Corpus path
arch/parisc/kernel/ptrace.c
Extension
.c
Size
22228 bytes
Lines
794
Domain
Architecture Layer
Bucket
arch/parisc
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_offset {
	const char *name;
	int offset;
};

#define REG_OFFSET_NAME(r)    {.name = #r, .offset = offsetof(struct pt_regs, r)}
#define REG_OFFSET_INDEX(r,i) {.name = #r#i, .offset = offsetof(struct pt_regs, r[i])}
#define REG_OFFSET_END {.name = NULL, .offset = 0}

static const struct pt_regs_offset regoffset_table[] = {
	REG_OFFSET_INDEX(gr,0),
	REG_OFFSET_INDEX(gr,1),
	REG_OFFSET_INDEX(gr,2),
	REG_OFFSET_INDEX(gr,3),
	REG_OFFSET_INDEX(gr,4),
	REG_OFFSET_INDEX(gr,5),
	REG_OFFSET_INDEX(gr,6),
	REG_OFFSET_INDEX(gr,7),
	REG_OFFSET_INDEX(gr,8),
	REG_OFFSET_INDEX(gr,9),
	REG_OFFSET_INDEX(gr,10),
	REG_OFFSET_INDEX(gr,11),
	REG_OFFSET_INDEX(gr,12),
	REG_OFFSET_INDEX(gr,13),
	REG_OFFSET_INDEX(gr,14),
	REG_OFFSET_INDEX(gr,15),
	REG_OFFSET_INDEX(gr,16),
	REG_OFFSET_INDEX(gr,17),
	REG_OFFSET_INDEX(gr,18),
	REG_OFFSET_INDEX(gr,19),
	REG_OFFSET_INDEX(gr,20),
	REG_OFFSET_INDEX(gr,21),
	REG_OFFSET_INDEX(gr,22),
	REG_OFFSET_INDEX(gr,23),
	REG_OFFSET_INDEX(gr,24),
	REG_OFFSET_INDEX(gr,25),
	REG_OFFSET_INDEX(gr,26),
	REG_OFFSET_INDEX(gr,27),
	REG_OFFSET_INDEX(gr,28),
	REG_OFFSET_INDEX(gr,29),
	REG_OFFSET_INDEX(gr,30),
	REG_OFFSET_INDEX(gr,31),
	REG_OFFSET_INDEX(sr,0),
	REG_OFFSET_INDEX(sr,1),
	REG_OFFSET_INDEX(sr,2),
	REG_OFFSET_INDEX(sr,3),
	REG_OFFSET_INDEX(sr,4),
	REG_OFFSET_INDEX(sr,5),
	REG_OFFSET_INDEX(sr,6),
	REG_OFFSET_INDEX(sr,7),
	REG_OFFSET_INDEX(iasq,0),
	REG_OFFSET_INDEX(iasq,1),
	REG_OFFSET_INDEX(iaoq,0),
	REG_OFFSET_INDEX(iaoq,1),
	REG_OFFSET_NAME(cr27),
	REG_OFFSET_NAME(ksp),
	REG_OFFSET_NAME(kpc),
	REG_OFFSET_NAME(sar),
	REG_OFFSET_NAME(iir),
	REG_OFFSET_NAME(isr),
	REG_OFFSET_NAME(ior),
	REG_OFFSET_NAME(ipsw),
	REG_OFFSET_END,
};

/**
 * regs_query_register_offset() - query register offset from its name
 * @name:	the name of a register
 *
 * regs_query_register_offset() returns the offset of a register in struct
 * pt_regs from its name. If the name is invalid, this returns -EINVAL;
 */
int regs_query_register_offset(const char *name)
{
	const struct pt_regs_offset *roff;
	for (roff = regoffset_table; roff->name != NULL; roff++)
		if (!strcmp(roff->name, name))
			return roff->offset;
	return -EINVAL;
}

/**
 * regs_query_register_name() - query register name from its offset
 * @offset:	the offset of a register in struct pt_regs.
 *
 * regs_query_register_name() returns the name of a register from its
 * offset in struct pt_regs. If the @offset is invalid, this returns NULL;
 */
const char *regs_query_register_name(unsigned int offset)
{

Annotation

Implementation Notes