303 lines
8.3 KiB
C
303 lines
8.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
|
|
*/
|
|
|
|
#include <linux/ptrace.h>
|
|
#include <linux/tracehook.h>
|
|
#include <linux/sched/task_stack.h>
|
|
#include <linux/regset.h>
|
|
#include <linux/unistd.h>
|
|
#include <linux/elf.h>
|
|
|
|
static struct callee_regs *task_callee_regs(struct task_struct *tsk)
|
|
{
|
|
struct callee_regs *tmp = (struct callee_regs *)tsk->thread.callee_reg;
|
|
return tmp;
|
|
}
|
|
|
|
static int genregs_get(struct task_struct *target,
|
|
const struct user_regset *regset,
|
|
unsigned int pos, unsigned int count,
|
|
void *kbuf, void __user *ubuf)
|
|
{
|
|
const struct pt_regs *ptregs = task_pt_regs(target);
|
|
const struct callee_regs *cregs = task_callee_regs(target);
|
|
int ret = 0;
|
|
unsigned int stop_pc_val;
|
|
|
|
#define REG_O_CHUNK(START, END, PTR) \
|
|
if (!ret) \
|
|
ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, PTR, \
|
|
offsetof(struct user_regs_struct, START), \
|
|
offsetof(struct user_regs_struct, END));
|
|
|
|
#define REG_O_ONE(LOC, PTR) \
|
|
if (!ret) \
|
|
ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, PTR, \
|
|
offsetof(struct user_regs_struct, LOC), \
|
|
offsetof(struct user_regs_struct, LOC) + 4);
|
|
|
|
#define REG_O_ZERO(LOC) \
|
|
if (!ret) \
|
|
ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf, \
|
|
offsetof(struct user_regs_struct, LOC), \
|
|
offsetof(struct user_regs_struct, LOC) + 4);
|
|
|
|
REG_O_ZERO(pad);
|
|
REG_O_ONE(scratch.bta, &ptregs->bta);
|
|
REG_O_ONE(scratch.lp_start, &ptregs->lp_start);
|
|
REG_O_ONE(scratch.lp_end, &ptregs->lp_end);
|
|
REG_O_ONE(scratch.lp_count, &ptregs->lp_count);
|
|
REG_O_ONE(scratch.status32, &ptregs->status32);
|
|
REG_O_ONE(scratch.ret, &ptregs->ret);
|
|
REG_O_ONE(scratch.blink, &ptregs->blink);
|
|
REG_O_ONE(scratch.fp, &ptregs->fp);
|
|
REG_O_ONE(scratch.gp, &ptregs->r26);
|
|
REG_O_ONE(scratch.r12, &ptregs->r12);
|
|
REG_O_ONE(scratch.r11, &ptregs->r11);
|
|
REG_O_ONE(scratch.r10, &ptregs->r10);
|
|
REG_O_ONE(scratch.r9, &ptregs->r9);
|
|
REG_O_ONE(scratch.r8, &ptregs->r8);
|
|
REG_O_ONE(scratch.r7, &ptregs->r7);
|
|
REG_O_ONE(scratch.r6, &ptregs->r6);
|
|
REG_O_ONE(scratch.r5, &ptregs->r5);
|
|
REG_O_ONE(scratch.r4, &ptregs->r4);
|
|
REG_O_ONE(scratch.r3, &ptregs->r3);
|
|
REG_O_ONE(scratch.r2, &ptregs->r2);
|
|
REG_O_ONE(scratch.r1, &ptregs->r1);
|
|
REG_O_ONE(scratch.r0, &ptregs->r0);
|
|
REG_O_ONE(scratch.sp, &ptregs->sp);
|
|
|
|
REG_O_ZERO(pad2);
|
|
|
|
REG_O_ONE(callee.r25, &cregs->r25);
|
|
REG_O_ONE(callee.r24, &cregs->r24);
|
|
REG_O_ONE(callee.r23, &cregs->r23);
|
|
REG_O_ONE(callee.r22, &cregs->r22);
|
|
REG_O_ONE(callee.r21, &cregs->r21);
|
|
REG_O_ONE(callee.r20, &cregs->r20);
|
|
REG_O_ONE(callee.r19, &cregs->r19);
|
|
REG_O_ONE(callee.r18, &cregs->r18);
|
|
REG_O_ONE(callee.r17, &cregs->r17);
|
|
REG_O_ONE(callee.r16, &cregs->r16);
|
|
REG_O_ONE(callee.r15, &cregs->r15);
|
|
REG_O_ONE(callee.r14, &cregs->r14);
|
|
REG_O_ONE(callee.r13, &cregs->r13);
|
|
|
|
REG_O_ONE(efa, &target->thread.fault_address);
|
|
|
|
if (!ret) {
|
|
if (in_brkpt_trap(ptregs)) {
|
|
stop_pc_val = target->thread.fault_address;
|
|
pr_debug("\t\tstop_pc (brk-pt)\n");
|
|
} else {
|
|
stop_pc_val = ptregs->ret;
|
|
pr_debug("\t\tstop_pc (others)\n");
|
|
}
|
|
|
|
REG_O_ONE(stop_pc, &stop_pc_val);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int genregs_set(struct task_struct *target,
|
|
const struct user_regset *regset,
|
|
unsigned int pos, unsigned int count,
|
|
const void *kbuf, const void __user *ubuf)
|
|
{
|
|
const struct pt_regs *ptregs = task_pt_regs(target);
|
|
const struct callee_regs *cregs = task_callee_regs(target);
|
|
int ret = 0;
|
|
|
|
#define REG_IN_CHUNK(FIRST, NEXT, PTR) \
|
|
if (!ret) \
|
|
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, \
|
|
(void *)(PTR), \
|
|
offsetof(struct user_regs_struct, FIRST), \
|
|
offsetof(struct user_regs_struct, NEXT));
|
|
|
|
#define REG_IN_ONE(LOC, PTR) \
|
|
if (!ret) \
|
|
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, \
|
|
(void *)(PTR), \
|
|
offsetof(struct user_regs_struct, LOC), \
|
|
offsetof(struct user_regs_struct, LOC) + 4);
|
|
|
|
#define REG_IGNORE_ONE(LOC) \
|
|
if (!ret) \
|
|
ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, \
|
|
offsetof(struct user_regs_struct, LOC), \
|
|
offsetof(struct user_regs_struct, LOC) + 4);
|
|
|
|
REG_IGNORE_ONE(pad);
|
|
|
|
REG_IN_ONE(scratch.bta, &ptregs->bta);
|
|
REG_IN_ONE(scratch.lp_start, &ptregs->lp_start);
|
|
REG_IN_ONE(scratch.lp_end, &ptregs->lp_end);
|
|
REG_IN_ONE(scratch.lp_count, &ptregs->lp_count);
|
|
|
|
REG_IGNORE_ONE(scratch.status32);
|
|
|
|
REG_IN_ONE(scratch.ret, &ptregs->ret);
|
|
REG_IN_ONE(scratch.blink, &ptregs->blink);
|
|
REG_IN_ONE(scratch.fp, &ptregs->fp);
|
|
REG_IN_ONE(scratch.gp, &ptregs->r26);
|
|
REG_IN_ONE(scratch.r12, &ptregs->r12);
|
|
REG_IN_ONE(scratch.r11, &ptregs->r11);
|
|
REG_IN_ONE(scratch.r10, &ptregs->r10);
|
|
REG_IN_ONE(scratch.r9, &ptregs->r9);
|
|
REG_IN_ONE(scratch.r8, &ptregs->r8);
|
|
REG_IN_ONE(scratch.r7, &ptregs->r7);
|
|
REG_IN_ONE(scratch.r6, &ptregs->r6);
|
|
REG_IN_ONE(scratch.r5, &ptregs->r5);
|
|
REG_IN_ONE(scratch.r4, &ptregs->r4);
|
|
REG_IN_ONE(scratch.r3, &ptregs->r3);
|
|
REG_IN_ONE(scratch.r2, &ptregs->r2);
|
|
REG_IN_ONE(scratch.r1, &ptregs->r1);
|
|
REG_IN_ONE(scratch.r0, &ptregs->r0);
|
|
REG_IN_ONE(scratch.sp, &ptregs->sp);
|
|
|
|
REG_IGNORE_ONE(pad2);
|
|
|
|
REG_IN_ONE(callee.r25, &cregs->r25);
|
|
REG_IN_ONE(callee.r24, &cregs->r24);
|
|
REG_IN_ONE(callee.r23, &cregs->r23);
|
|
REG_IN_ONE(callee.r22, &cregs->r22);
|
|
REG_IN_ONE(callee.r21, &cregs->r21);
|
|
REG_IN_ONE(callee.r20, &cregs->r20);
|
|
REG_IN_ONE(callee.r19, &cregs->r19);
|
|
REG_IN_ONE(callee.r18, &cregs->r18);
|
|
REG_IN_ONE(callee.r17, &cregs->r17);
|
|
REG_IN_ONE(callee.r16, &cregs->r16);
|
|
REG_IN_ONE(callee.r15, &cregs->r15);
|
|
REG_IN_ONE(callee.r14, &cregs->r14);
|
|
REG_IN_ONE(callee.r13, &cregs->r13);
|
|
|
|
REG_IGNORE_ONE(efa); /* efa update invalid */
|
|
REG_IGNORE_ONE(stop_pc); /* PC updated via @ret */
|
|
|
|
return ret;
|
|
}
|
|
|
|
#ifdef CONFIG_ISA_ARCV2
|
|
static int arcv2regs_get(struct task_struct *target,
|
|
const struct user_regset *regset,
|
|
unsigned int pos, unsigned int count,
|
|
void *kbuf, void __user *ubuf)
|
|
{
|
|
const struct pt_regs *regs = task_pt_regs(target);
|
|
int ret, copy_sz;
|
|
|
|
if (IS_ENABLED(CONFIG_ARC_HAS_ACCL_REGS))
|
|
copy_sz = sizeof(struct user_regs_arcv2);
|
|
else
|
|
copy_sz = 4; /* r30 only */
|
|
|
|
/*
|
|
* itemized copy not needed like above as layout of regs (r30,r58,r59)
|
|
* is exactly same in kernel (pt_regs) and userspace (user_regs_arcv2)
|
|
*/
|
|
ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, ®s->r30,
|
|
0, copy_sz);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int arcv2regs_set(struct task_struct *target,
|
|
const struct user_regset *regset,
|
|
unsigned int pos, unsigned int count,
|
|
const void *kbuf, const void __user *ubuf)
|
|
{
|
|
const struct pt_regs *regs = task_pt_regs(target);
|
|
int ret, copy_sz;
|
|
|
|
if (IS_ENABLED(CONFIG_ARC_HAS_ACCL_REGS))
|
|
copy_sz = sizeof(struct user_regs_arcv2);
|
|
else
|
|
copy_sz = 4; /* r30 only */
|
|
|
|
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, (void *)®s->r30,
|
|
0, copy_sz);
|
|
|
|
return ret;
|
|
}
|
|
|
|
#endif
|
|
|
|
enum arc_getset {
|
|
REGSET_CMN,
|
|
REGSET_ARCV2,
|
|
};
|
|
|
|
static const struct user_regset arc_regsets[] = {
|
|
[REGSET_CMN] = {
|
|
.core_note_type = NT_PRSTATUS,
|
|
.n = ELF_NGREG,
|
|
.size = sizeof(unsigned long),
|
|
.align = sizeof(unsigned long),
|
|
.get = genregs_get,
|
|
.set = genregs_set,
|
|
},
|
|
#ifdef CONFIG_ISA_ARCV2
|
|
[REGSET_ARCV2] = {
|
|
.core_note_type = NT_ARC_V2,
|
|
.n = ELF_ARCV2REG,
|
|
.size = sizeof(unsigned long),
|
|
.align = sizeof(unsigned long),
|
|
.get = arcv2regs_get,
|
|
.set = arcv2regs_set,
|
|
},
|
|
#endif
|
|
};
|
|
|
|
static const struct user_regset_view user_arc_view = {
|
|
.name = UTS_MACHINE,
|
|
.e_machine = EM_ARC_INUSE,
|
|
.regsets = arc_regsets,
|
|
.n = ARRAY_SIZE(arc_regsets)
|
|
};
|
|
|
|
const struct user_regset_view *task_user_regset_view(struct task_struct *task)
|
|
{
|
|
return &user_arc_view;
|
|
}
|
|
|
|
void ptrace_disable(struct task_struct *child)
|
|
{
|
|
}
|
|
|
|
long arch_ptrace(struct task_struct *child, long request,
|
|
unsigned long addr, unsigned long data)
|
|
{
|
|
int ret = -EIO;
|
|
|
|
pr_debug("REQ=%ld: ADDR =0x%lx, DATA=0x%lx)\n", request, addr, data);
|
|
|
|
switch (request) {
|
|
case PTRACE_GET_THREAD_AREA:
|
|
ret = put_user(task_thread_info(child)->thr_ptr,
|
|
(unsigned long __user *)data);
|
|
break;
|
|
default:
|
|
ret = ptrace_request(child, request, addr, data);
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
asmlinkage int syscall_trace_entry(struct pt_regs *regs)
|
|
{
|
|
if (tracehook_report_syscall_entry(regs))
|
|
return ULONG_MAX;
|
|
|
|
return regs->r8;
|
|
}
|
|
|
|
asmlinkage void syscall_trace_exit(struct pt_regs *regs)
|
|
{
|
|
tracehook_report_syscall_exit(regs, 0);
|
|
}
|