1. 根目录:
2. arch
3. hexagon
4. include
5. uapi
6. asm
7. user.h

#ifndef HEXAGON_ASM_USER_H
#define HEXAGON_ASM_USER_H

/*
 * Layout for registers passed in elf core dumps to userspace.
 *
 * Basically a rearranged subset of "pt_regs".
 *
 * Interested parties:  libc, gdb...
 */

struct user_regs_struct {
	unsigned long r0;
	unsigned long r1;
	unsigned long r2;
	unsigned long r3;
	unsigned long r4;
	unsigned long r5;
	unsigned long r6;
	unsigned long r7;
	unsigned long r8;
	unsigned long r9;
	unsigned long r10;
	unsigned long r11;
	unsigned long r12;
	unsigned long r13;
	unsigned long r14;
	unsigned long r15;
	unsigned long r16;
	unsigned long r17;
	unsigned long r18;
	unsigned long r19;
	unsigned long r20;
	unsigned long r21;
	unsigned long r22;
	unsigned long r23;
	unsigned long r24;
	unsigned long r25;
	unsigned long r26;
	unsigned long r27;
	unsigned long r28;
	unsigned long r29;
	unsigned long r30;
	unsigned long r31;
	unsigned long sa0;
	unsigned long lc0;
	unsigned long sa1;
	unsigned long lc1;
	unsigned long m0;
	unsigned long m1;
	unsigned long usr;
	unsigned long p3_0;
	unsigned long gp;
	unsigned long ugp;
	unsigned long pc;
	unsigned long cause;
	unsigned long badva;
#if CONFIG_HEXAGON_ARCH_VERSION < 4
	unsigned long pad1;  /* pad out to 48 words total */
	unsigned long pad2;  /* pad out to 48 words total */
	unsigned long pad3;  /* pad out to 48 words total */
#else
	unsigned long cs0;
	unsigned long cs1;
	unsigned long pad1;  /* pad out to 48 words total */
#endif
};

#endif