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#define REG_R0 0
#define REG_A0 16
#define trace_reg_sysnum r0
static unsigned long trace_arg(void *vregs, int num)
{
trace_regs *regs = vregs;
if (num < 7)
return *(®s->r16 + num - 1);
else
return -1;
}
static long do_peekuser(long offset)
{
return do_ptrace(PTRACE_PEEKUSER, (void *)offset, NULL);
}
static long do_pokeuser(long offset, long val)
{
return do_ptrace(PTRACE_POKEUSER, (void *)offset, (void *)val);
}
#undef trace_get_regs
static long trace_get_regs(void *vregs)
{
trace_regs *regs = vregs;
size_t i;
regs->r0 = do_peekuser(REG_R0);
for (i = 0; i < 7; ++i)
*(®s->r16 + i) = do_peekuser(REG_A0 + i);
return 0;
}
#undef trace_set_regs
static long trace_set_regs(void *vregs)
{
trace_regs *regs = vregs;
size_t i;
do_pokeuser(REG_R0, regs->r0);
for (i = 0; i < 7; ++i)
do_pokeuser(REG_A0 + i, *(®s->r16 + i));
return 0;
}
static long trace_raw_ret(void *vregs)
{
trace_regs *regs = vregs;
return regs->r16;
}
static void trace_set_ret(void *vregs, int err)
{
trace_regs *regs = vregs;
regs->r0 = -err;
trace_set_regs(regs);
}
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