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#include "config.h"
#include <sys/types.h>
#include <sys/ptrace.h>
#include <errno.h>
#include <asm/ptrace_offsets.h>
#include <asm/rse.h>
#include <stddef.h>
#include "common.h"
void *
get_instruction_pointer(Process *proc) {
unsigned long ip = ptrace(PTRACE_PEEKUSER, proc->pid, PT_CR_IIP, 0);
unsigned long slot =
(ptrace(PTRACE_PEEKUSER, proc->pid, PT_CR_IPSR, 0) >> 41) & 3;
return (void *)(ip | slot);
}
void
set_instruction_pointer(Process *proc, void *addr) {
unsigned long newip = (unsigned long)addr;
unsigned long slot = (unsigned long)addr & 0xf;
unsigned long psr = ptrace(PTRACE_PEEKUSER, proc->pid, PT_CR_IPSR, 0);
psr &= ~(3UL << 41);
psr |= (slot & 0x3) << 41;
newip &= ~0xfUL;
ptrace(PTRACE_POKEUSER, proc->pid, PT_CR_IIP, (long)newip);
ptrace(PTRACE_POKEUSER, proc->pid, PT_CR_IPSR, psr);
}
void *
get_stack_pointer(Process *proc) {
long l = ptrace(PTRACE_PEEKUSER, proc->pid, PT_R12, 0);
if (l == -1 && errno)
return NULL;
return (void *)l;
}
void *
get_return_addr(Process *proc, void *stack_pointer) {
long l = ptrace(PTRACE_PEEKUSER, proc->pid, PT_B0, 0);
if (l == -1 && errno)
return NULL;
return (void *)l;
}
void
set_return_addr(Process *proc, void *addr) {
ptrace(PTRACE_POKEUSER, proc->pid, PT_B0, addr);
}
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