| /* | |
| * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com) | |
| * Licensed under the GPL | |
| */ | |
| #include <unistd.h> | |
| #include <signal.h> | |
| #include <errno.h> | |
| #include <asm/unistd.h> | |
| #include "sysdep/ptrace.h" | |
| #include "sigcontext.h" | |
| #include "ptrace_user.h" | |
| #include "task.h" | |
| #include "user_util.h" | |
| #include "kern_util.h" | |
| #include "syscall.h" | |
| #include "tt.h" | |
| void do_sigtrap(void *task) | |
| { | |
| UPT_SYSCALL_NR(TASK_REGS(task)) = -1; | |
| } | |
| void do_syscall(void *task, int pid, int local_using_sysemu) | |
| { | |
| unsigned long proc_regs[FRAME_SIZE]; | |
| if(ptrace_getregs(pid, proc_regs) < 0) | |
| tracer_panic("Couldn't read registers"); | |
| UPT_SYSCALL_NR(TASK_REGS(task)) = PT_SYSCALL_NR(proc_regs); | |
| #ifdef UPT_ORIGGPR2 | |
| UPT_ORIGGPR2(TASK_REGS(task)) = REGS_ORIGGPR2(proc_regs); | |
| #endif | |
| if(((unsigned long *) PT_IP(proc_regs) >= &_stext) && | |
| ((unsigned long *) PT_IP(proc_regs) <= &_etext)) | |
| tracer_panic("I'm tracing myself and I can't get out"); | |
| /* advanced sysemu mode set syscall number to -1 automatically */ | |
| if (local_using_sysemu==2) | |
| return; | |
| /* syscall number -1 in sysemu skips syscall restarting in host */ | |
| if(ptrace(PTRACE_POKEUSR, pid, PT_SYSCALL_NR_OFFSET, | |
| local_using_sysemu ? -1 : __NR_getpid) < 0) | |
| tracer_panic("do_syscall : Nullifying syscall failed, " | |
| "errno = %d", errno); | |
| } | |
| /* | |
| * Overrides for Emacs so that we follow Linus's tabbing style. | |
| * Emacs will notice this stuff at the end of the file and automatically | |
| * adjust the settings for this buffer only. This must remain at the end | |
| * of the file. | |
| * --------------------------------------------------------------------------- | |
| * Local variables: | |
| * c-file-style: "linux" | |
| * End: | |
| */ |