Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6) #include <linux/ptrace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) #include <linux/tracehook.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <linux/sched/task_stack.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/regset.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/unistd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/elf.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) static struct callee_regs *task_callee_regs(struct task_struct *tsk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) 	struct callee_regs *tmp = (struct callee_regs *)tsk->thread.callee_reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) 	return tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) static int genregs_get(struct task_struct *target,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 		       const struct user_regset *regset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 		       struct membuf to)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 	const struct pt_regs *ptregs = task_pt_regs(target);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 	const struct callee_regs *cregs = task_callee_regs(target);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 	unsigned int stop_pc_val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	membuf_zero(&to, 4);	// pad
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	membuf_store(&to, ptregs->bta);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	membuf_store(&to, ptregs->lp_start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	membuf_store(&to, ptregs->lp_end);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	membuf_store(&to, ptregs->lp_count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	membuf_store(&to, ptregs->status32);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	membuf_store(&to, ptregs->ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	membuf_store(&to, ptregs->blink);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	membuf_store(&to, ptregs->fp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	membuf_store(&to, ptregs->r26);	// gp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	membuf_store(&to, ptregs->r12);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	membuf_store(&to, ptregs->r11);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	membuf_store(&to, ptregs->r10);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	membuf_store(&to, ptregs->r9);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	membuf_store(&to, ptregs->r8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	membuf_store(&to, ptregs->r7);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	membuf_store(&to, ptregs->r6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	membuf_store(&to, ptregs->r5);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	membuf_store(&to, ptregs->r4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	membuf_store(&to, ptregs->r3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	membuf_store(&to, ptregs->r2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	membuf_store(&to, ptregs->r1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	membuf_store(&to, ptregs->r0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	membuf_store(&to, ptregs->sp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	membuf_zero(&to, 4);	// pad2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	membuf_store(&to, cregs->r25);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	membuf_store(&to, cregs->r24);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	membuf_store(&to, cregs->r23);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	membuf_store(&to, cregs->r22);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	membuf_store(&to, cregs->r21);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	membuf_store(&to, cregs->r20);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	membuf_store(&to, cregs->r19);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	membuf_store(&to, cregs->r18);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	membuf_store(&to, cregs->r17);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	membuf_store(&to, cregs->r16);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	membuf_store(&to, cregs->r15);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	membuf_store(&to, cregs->r14);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	membuf_store(&to, cregs->r13);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	membuf_store(&to, target->thread.fault_address); // efa
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	if (in_brkpt_trap(ptregs)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 		stop_pc_val = target->thread.fault_address;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 		pr_debug("\t\tstop_pc (brk-pt)\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 		stop_pc_val = ptregs->ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 		pr_debug("\t\tstop_pc (others)\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	return membuf_store(&to, stop_pc_val); // stop_pc
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) static int genregs_set(struct task_struct *target,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 		       const struct user_regset *regset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 		       unsigned int pos, unsigned int count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 		       const void *kbuf, const void __user *ubuf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	const struct pt_regs *ptregs = task_pt_regs(target);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	const struct callee_regs *cregs = task_callee_regs(target);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) #define REG_IN_CHUNK(FIRST, NEXT, PTR)	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	if (!ret)			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 		ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 			(void *)(PTR), \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 			offsetof(struct user_regs_struct, FIRST), \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 			offsetof(struct user_regs_struct, NEXT));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) #define REG_IN_ONE(LOC, PTR)		\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	if (!ret)			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 		ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 			(void *)(PTR), \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 			offsetof(struct user_regs_struct, LOC), \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 			offsetof(struct user_regs_struct, LOC) + 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) #define REG_IGNORE_ONE(LOC)		\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	if (!ret)			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 		ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 			offsetof(struct user_regs_struct, LOC), \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 			offsetof(struct user_regs_struct, LOC) + 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	REG_IGNORE_ONE(pad);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	REG_IN_ONE(scratch.bta, &ptregs->bta);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	REG_IN_ONE(scratch.lp_start, &ptregs->lp_start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	REG_IN_ONE(scratch.lp_end, &ptregs->lp_end);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	REG_IN_ONE(scratch.lp_count, &ptregs->lp_count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	REG_IGNORE_ONE(scratch.status32);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	REG_IN_ONE(scratch.ret, &ptregs->ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	REG_IN_ONE(scratch.blink, &ptregs->blink);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	REG_IN_ONE(scratch.fp, &ptregs->fp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	REG_IN_ONE(scratch.gp, &ptregs->r26);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	REG_IN_ONE(scratch.r12, &ptregs->r12);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	REG_IN_ONE(scratch.r11, &ptregs->r11);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	REG_IN_ONE(scratch.r10, &ptregs->r10);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	REG_IN_ONE(scratch.r9, &ptregs->r9);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	REG_IN_ONE(scratch.r8, &ptregs->r8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	REG_IN_ONE(scratch.r7, &ptregs->r7);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	REG_IN_ONE(scratch.r6, &ptregs->r6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	REG_IN_ONE(scratch.r5, &ptregs->r5);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	REG_IN_ONE(scratch.r4, &ptregs->r4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	REG_IN_ONE(scratch.r3, &ptregs->r3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	REG_IN_ONE(scratch.r2, &ptregs->r2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	REG_IN_ONE(scratch.r1, &ptregs->r1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	REG_IN_ONE(scratch.r0, &ptregs->r0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	REG_IN_ONE(scratch.sp, &ptregs->sp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	REG_IGNORE_ONE(pad2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	REG_IN_ONE(callee.r25, &cregs->r25);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	REG_IN_ONE(callee.r24, &cregs->r24);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	REG_IN_ONE(callee.r23, &cregs->r23);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	REG_IN_ONE(callee.r22, &cregs->r22);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	REG_IN_ONE(callee.r21, &cregs->r21);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	REG_IN_ONE(callee.r20, &cregs->r20);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	REG_IN_ONE(callee.r19, &cregs->r19);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	REG_IN_ONE(callee.r18, &cregs->r18);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	REG_IN_ONE(callee.r17, &cregs->r17);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	REG_IN_ONE(callee.r16, &cregs->r16);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	REG_IN_ONE(callee.r15, &cregs->r15);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	REG_IN_ONE(callee.r14, &cregs->r14);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	REG_IN_ONE(callee.r13, &cregs->r13);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	REG_IGNORE_ONE(efa);			/* efa update invalid */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	REG_IGNORE_ONE(stop_pc);		/* PC updated via @ret */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) #ifdef CONFIG_ISA_ARCV2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) static int arcv2regs_get(struct task_struct *target,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 		       const struct user_regset *regset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 		       struct membuf to)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	const struct pt_regs *regs = task_pt_regs(target);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	if (IS_ENABLED(CONFIG_ARC_HAS_ACCL_REGS))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 		 * itemized copy not needed like above as layout of regs (r30,r58,r59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 		 * is exactly same in kernel (pt_regs) and userspace (user_regs_arcv2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 		return membuf_write(&to, &regs->r30, sizeof(struct user_regs_arcv2));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	membuf_write(&to, &regs->r30, 4); /* r30 only */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	return membuf_zero(&to, sizeof(struct user_regs_arcv2) - 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) static int arcv2regs_set(struct task_struct *target,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 		       const struct user_regset *regset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 		       unsigned int pos, unsigned int count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 		       const void *kbuf, const void __user *ubuf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	const struct pt_regs *regs = task_pt_regs(target);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	int ret, copy_sz;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	if (IS_ENABLED(CONFIG_ARC_HAS_ACCL_REGS))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 		copy_sz = sizeof(struct user_regs_arcv2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 		copy_sz = 4;	/* r30 only */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, (void *)&regs->r30,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 				  0, copy_sz);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) enum arc_getset {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	REGSET_CMN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	REGSET_ARCV2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) static const struct user_regset arc_regsets[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	[REGSET_CMN] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	       .core_note_type = NT_PRSTATUS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	       .n = ELF_NGREG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	       .size = sizeof(unsigned long),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	       .align = sizeof(unsigned long),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	       .regset_get = genregs_get,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	       .set = genregs_set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) #ifdef CONFIG_ISA_ARCV2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	[REGSET_ARCV2] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	       .core_note_type = NT_ARC_V2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	       .n = ELF_ARCV2REG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	       .size = sizeof(unsigned long),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	       .align = sizeof(unsigned long),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	       .regset_get = arcv2regs_get,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	       .set = arcv2regs_set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) static const struct user_regset_view user_arc_view = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	.name		= "arc",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	.e_machine	= EM_ARC_INUSE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	.regsets	= arc_regsets,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	.n		= ARRAY_SIZE(arc_regsets)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) const struct user_regset_view *task_user_regset_view(struct task_struct *task)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	return &user_arc_view;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) void ptrace_disable(struct task_struct *child)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) long arch_ptrace(struct task_struct *child, long request,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 		 unsigned long addr, unsigned long data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	int ret = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	pr_debug("REQ=%ld: ADDR =0x%lx, DATA=0x%lx)\n", request, addr, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	switch (request) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	case PTRACE_GET_THREAD_AREA:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 		ret = put_user(task_thread_info(child)->thr_ptr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 			       (unsigned long __user *)data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 		ret = ptrace_request(child, request, addr, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) asmlinkage int syscall_trace_entry(struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	if (tracehook_report_syscall_entry(regs))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 		return ULONG_MAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	return regs->r8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) asmlinkage void syscall_trace_exit(struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	tracehook_report_syscall_exit(regs, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) }