arch/loongarch/kernel/ptrace.c

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

File Facts

System
Linux kernel
Corpus path
arch/loongarch/kernel/ptrace.c
Extension
.c
Size
26497 bytes
Lines
1096
Domain
Architecture Layer
Bucket
arch/loongarch
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(n, r) {.name = #n, .offset = offsetof(struct pt_regs, r)}
#define REG_OFFSET_END {.name = NULL, .offset = 0}

static const struct pt_regs_offset regoffset_table[] = {
	REG_OFFSET_NAME(r0, regs[0]),
	REG_OFFSET_NAME(r1, regs[1]),
	REG_OFFSET_NAME(r2, regs[2]),
	REG_OFFSET_NAME(r3, regs[3]),
	REG_OFFSET_NAME(r4, regs[4]),
	REG_OFFSET_NAME(r5, regs[5]),
	REG_OFFSET_NAME(r6, regs[6]),
	REG_OFFSET_NAME(r7, regs[7]),
	REG_OFFSET_NAME(r8, regs[8]),
	REG_OFFSET_NAME(r9, regs[9]),
	REG_OFFSET_NAME(r10, regs[10]),
	REG_OFFSET_NAME(r11, regs[11]),
	REG_OFFSET_NAME(r12, regs[12]),
	REG_OFFSET_NAME(r13, regs[13]),
	REG_OFFSET_NAME(r14, regs[14]),
	REG_OFFSET_NAME(r15, regs[15]),
	REG_OFFSET_NAME(r16, regs[16]),
	REG_OFFSET_NAME(r17, regs[17]),
	REG_OFFSET_NAME(r18, regs[18]),
	REG_OFFSET_NAME(r19, regs[19]),
	REG_OFFSET_NAME(r20, regs[20]),
	REG_OFFSET_NAME(r21, regs[21]),
	REG_OFFSET_NAME(r22, regs[22]),
	REG_OFFSET_NAME(r23, regs[23]),
	REG_OFFSET_NAME(r24, regs[24]),
	REG_OFFSET_NAME(r25, regs[25]),
	REG_OFFSET_NAME(r26, regs[26]),
	REG_OFFSET_NAME(r27, regs[27]),
	REG_OFFSET_NAME(r28, regs[28]),
	REG_OFFSET_NAME(r29, regs[29]),
	REG_OFFSET_NAME(r30, regs[30]),
	REG_OFFSET_NAME(r31, regs[31]),
	REG_OFFSET_NAME(orig_a0, orig_a0),
	REG_OFFSET_NAME(csr_era, csr_era),
	REG_OFFSET_NAME(csr_badvaddr, csr_badvaddr),
	REG_OFFSET_NAME(csr_crmd, csr_crmd),
	REG_OFFSET_NAME(csr_prmd, csr_prmd),
	REG_OFFSET_NAME(csr_euen, csr_euen),
	REG_OFFSET_NAME(csr_ecfg, csr_ecfg),
	REG_OFFSET_NAME(csr_estat, csr_estat),
	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;
}

enum loongarch_regset {
	REGSET_GPR,
	REGSET_FPR,
	REGSET_CPUCFG,
#ifdef CONFIG_CPU_HAS_LSX
	REGSET_LSX,
#endif
#ifdef CONFIG_CPU_HAS_LASX
	REGSET_LASX,
#endif
#ifdef CONFIG_CPU_HAS_LBT
	REGSET_LBT,
#endif
#ifdef CONFIG_HAVE_HW_BREAKPOINT
	REGSET_HW_BREAK,
	REGSET_HW_WATCH,
#endif
};

static const struct user_regset loongarch64_regsets[] = {
	[REGSET_GPR] = {

Annotation

Implementation Notes