regs.c revision f670eea50e959eeb9da53d70cad8d43c19494ef0
1#include "config.h" 2 3#include <sys/types.h> 4#include <sys/ptrace.h> 5#include <asm/ptrace.h> 6 7#include "common.h" 8 9#if (!defined(PTRACE_PEEKUSER) && defined(PTRACE_PEEKUSR)) 10# define PTRACE_PEEKUSER PTRACE_PEEKUSR 11#endif 12 13#if (!defined(PTRACE_POKEUSER) && defined(PTRACE_POKEUSR)) 14# define PTRACE_POKEUSER PTRACE_POKEUSR 15#endif 16 17#define off_pc 60 18#define off_lr 56 19#define off_sp 52 20 21void * 22get_instruction_pointer(Process *proc) { 23 return (void *)ptrace(PTRACE_PEEKUSER, proc->pid, off_pc, 0); 24} 25 26void 27set_instruction_pointer(Process *proc, void *addr) { 28 ptrace(PTRACE_POKEUSER, proc->pid, off_pc, addr); 29} 30 31void * 32get_stack_pointer(Process *proc) { 33 return (void *)ptrace(PTRACE_PEEKUSER, proc->pid, off_sp, 0); 34} 35 36/* really, this is given the *stack_pointer expecting 37 * a CISC architecture; in our case, we don't need that */ 38void * 39get_return_addr(Process *proc, void *stack_pointer) { 40 long addr = ptrace(PTRACE_PEEKUSER, proc->pid, off_lr, 0); 41 42 proc->thumb_mode = addr & 1; 43 if (proc->thumb_mode) 44 addr &= ~1; 45 return (void *)addr; 46} 47 48void 49set_return_addr(Process *proc, void *addr) { 50 ptrace(PTRACE_POKEUSER, proc->pid, off_lr, addr); 51} 52