diff options
Diffstat (limited to 'arch/um/kernel/ptrace.c')
| -rw-r--r-- | arch/um/kernel/ptrace.c | 79 |
1 files changed, 29 insertions, 50 deletions
diff --git a/arch/um/kernel/ptrace.c b/arch/um/kernel/ptrace.c index 3efa59a941a4..2b75d8d9ba73 100644 --- a/arch/um/kernel/ptrace.c +++ b/arch/um/kernel/ptrace.c @@ -19,15 +19,30 @@ #include "skas_ptrace.h" #include "sysdep/ptrace.h" +static inline void set_singlestepping(struct task_struct *child, int on) +{ + if (on) + child->ptrace |= PT_DTRACE; + else + child->ptrace &= ~PT_DTRACE; + child->thread.singlestep_syscall = 0; + +#ifdef SUBARCH_SET_SINGLESTEPPING + SUBARCH_SET_SINGLESTEPPING(child, on) +#endif + } + /* * Called by kernel/ptrace.c when detaching.. */ void ptrace_disable(struct task_struct *child) { - child->ptrace &= ~PT_DTRACE; - child->thread.singlestep_syscall = 0; + set_singlestepping(child,0); } +extern int peek_user(struct task_struct * child, long addr, long data); +extern int poke_user(struct task_struct * child, long addr, long data); + long sys_ptrace(long request, long pid, long addr, long data) { struct task_struct *child; @@ -67,6 +82,10 @@ long sys_ptrace(long request, long pid, long addr, long data) goto out_tsk; } +#ifdef SUBACH_PTRACE_SPECIAL + SUBARCH_PTRACE_SPECIAL(child,request,addr,data) +#endif + ret = ptrace_check_attach(child, request == PTRACE_KILL); if (ret < 0) goto out_tsk; @@ -87,28 +106,9 @@ long sys_ptrace(long request, long pid, long addr, long data) } /* read the word at location addr in the USER area. */ - case PTRACE_PEEKUSR: { - unsigned long tmp; - - ret = -EIO; - if ((addr & 3) || addr < 0) - break; - - tmp = 0; /* Default return condition */ - if(addr < MAX_REG_OFFSET){ - tmp = getreg(child, addr); - } -#if defined(CONFIG_UML_X86) && !defined(CONFIG_64BIT) - else if((addr >= offsetof(struct user, u_debugreg[0])) && - (addr <= offsetof(struct user, u_debugreg[7]))){ - addr -= offsetof(struct user, u_debugreg[0]); - addr = addr >> 2; - tmp = child->thread.arch.debugregs[addr]; - } -#endif - ret = put_user(tmp, (unsigned long __user *) data); - break; - } + case PTRACE_PEEKUSR: + ret = peek_user(child, addr, data); + break; /* when I and D space are separate, this will have to be fixed. */ case PTRACE_POKETEXT: /* write the word at location addr. */ @@ -121,26 +121,8 @@ long sys_ptrace(long request, long pid, long addr, long data) break; case PTRACE_POKEUSR: /* write the word at location addr in the USER area */ - ret = -EIO; - if ((addr & 3) || addr < 0) - break; - - if (addr < MAX_REG_OFFSET) { - ret = putreg(child, addr, data); - break; - } -#if defined(CONFIG_UML_X86) && !defined(CONFIG_64BIT) - else if((addr >= offsetof(struct user, u_debugreg[0])) && - (addr <= offsetof(struct user, u_debugreg[7]))){ - addr -= offsetof(struct user, u_debugreg[0]); - addr = addr >> 2; - if((addr == 4) || (addr == 5)) break; - child->thread.arch.debugregs[addr] = data; - ret = 0; - } -#endif - - break; + ret = poke_user(child, addr, data); + break; case PTRACE_SYSCALL: /* continue and stop at next (return from) syscall */ case PTRACE_CONT: { /* restart after signal. */ @@ -148,8 +130,7 @@ long sys_ptrace(long request, long pid, long addr, long data) if (!valid_signal(data)) break; - child->ptrace &= ~PT_DTRACE; - child->thread.singlestep_syscall = 0; + set_singlestepping(child, 0); if (request == PTRACE_SYSCALL) { set_tsk_thread_flag(child, TIF_SYSCALL_TRACE); } @@ -172,8 +153,7 @@ long sys_ptrace(long request, long pid, long addr, long data) if (child->exit_state == EXIT_ZOMBIE) /* already dead */ break; - child->ptrace &= ~PT_DTRACE; - child->thread.singlestep_syscall = 0; + set_singlestepping(child, 0); child->exit_code = SIGKILL; wake_up_process(child); break; @@ -184,8 +164,7 @@ long sys_ptrace(long request, long pid, long addr, long data) if (!valid_signal(data)) break; clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE); - child->ptrace |= PT_DTRACE; - child->thread.singlestep_syscall = 0; + set_singlestepping(child, 1); child->exit_code = data; /* give it a chance to run. */ wake_up_process(child); |