1/* 2 * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com) 3 * Licensed under the GPL 4 */ 5 6#include <unistd.h> 7#include <signal.h> 8#include <errno.h> 9#include <asm/unistd.h> 10#include "sysdep/ptrace.h" 11#include "sigcontext.h" 12#include "ptrace_user.h" 13#include "task.h" 14#include "kern_util.h" 15#include "syscall.h" 16#include "tt.h" 17 18void do_sigtrap(void *task) 19{ 20 UPT_SYSCALL_NR(TASK_REGS(task)) = -1; 21} 22 23void do_syscall(void *task, int pid, int local_using_sysemu) 24{ 25 unsigned long proc_regs[FRAME_SIZE]; 26 27 if(ptrace_getregs(pid, proc_regs) < 0) 28 tracer_panic("Couldn't read registers"); 29 30 UPT_SYSCALL_NR(TASK_REGS(task)) = PT_SYSCALL_NR(proc_regs); 31 32#ifdef UPT_ORIGGPR2 33 UPT_ORIGGPR2(TASK_REGS(task)) = REGS_ORIGGPR2(proc_regs); 34#endif 35 36 if(((unsigned long *) PT_IP(proc_regs) >= &_stext) && 37 ((unsigned long *) PT_IP(proc_regs) <= &_etext)) 38 tracer_panic("I'm tracing myself and I can't get out"); 39 40 /* advanced sysemu mode set syscall number to -1 automatically */ 41 if (local_using_sysemu==2) 42 return; 43 44 /* syscall number -1 in sysemu skips syscall restarting in host */ 45 if(ptrace(PTRACE_POKEUSR, pid, PT_SYSCALL_NR_OFFSET, 46 local_using_sysemu ? -1 : __NR_getpid) < 0) 47 tracer_panic("do_syscall : Nullifying syscall failed, " 48 "errno = %d", errno); 49} 50 51/* 52 * Overrides for Emacs so that we follow Linus's tabbing style. 53 * Emacs will notice this stuff at the end of the file and automatically 54 * adjust the settings for this buffer only. This must remain at the end 55 * of the file. 56 * --------------------------------------------------------------------------- 57 * Local variables: 58 * c-file-style: "linux" 59 * End: 60 */ 61