summaryrefslogtreecommitdiff
path: root/arch/um/kernel/ptrace.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/um/kernel/ptrace.c')
-rw-r--r--arch/um/kernel/ptrace.c123
1 files changed, 52 insertions, 71 deletions
diff --git a/arch/um/kernel/ptrace.c b/arch/um/kernel/ptrace.c
index 3a99ee6d94eb..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;
@@ -87,26 +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);
- }
- 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];
- }
- 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. */
@@ -119,35 +121,16 @@ 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 0 /* XXX x86_64 */
- 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. */
ret = -EIO;
- if ((unsigned long) data > _NSIG)
+ 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);
}
@@ -170,8 +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;
@@ -179,11 +161,10 @@ long sys_ptrace(long request, long pid, long addr, long data)
case PTRACE_SINGLESTEP: { /* set the trap flag. */
ret = -EIO;
- if ((unsigned long) data > _NSIG)
+ 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);
@@ -250,23 +231,19 @@ long sys_ptrace(long request, long pid, long addr, long data)
break;
#endif
case PTRACE_FAULTINFO: {
- struct ptrace_faultinfo fault;
-
- fault = ((struct ptrace_faultinfo)
- { .is_write = child->thread.err,
- .addr = child->thread.cr2 });
- ret = copy_to_user((unsigned long __user *) data, &fault,
- sizeof(fault));
+ /* Take the info from thread->arch->faultinfo,
+ * but transfer max. sizeof(struct ptrace_faultinfo).
+ * On i386, ptrace_faultinfo is smaller!
+ */
+ ret = copy_to_user((unsigned long __user *) data,
+ &child->thread.arch.faultinfo,
+ sizeof(struct ptrace_faultinfo));
if(ret)
break;
break;
}
- case PTRACE_SIGPENDING:
- ret = copy_to_user((unsigned long __user *) data,
- &child->pending.signal,
- sizeof(child->pending.signal));
- break;
+#ifdef PTRACE_LDT
case PTRACE_LDT: {
struct ptrace_ldt ldt;
@@ -282,6 +259,7 @@ long sys_ptrace(long request, long pid, long addr, long data)
ret = -EIO;
break;
}
+#endif
#ifdef CONFIG_PROC_MM
case PTRACE_SWITCH_MM: {
struct mm_struct *old = child->mm;
@@ -337,15 +315,18 @@ void syscall_trace(union uml_pt_regs *regs, int entryexit)
if (unlikely(current->audit_context)) {
if (!entryexit)
- audit_syscall_entry(current,
- UPT_SYSCALL_NR(&regs->regs),
- UPT_SYSCALL_ARG1(&regs->regs),
- UPT_SYSCALL_ARG2(&regs->regs),
- UPT_SYSCALL_ARG3(&regs->regs),
- UPT_SYSCALL_ARG4(&regs->regs));
- else
- audit_syscall_exit(current,
- UPT_SYSCALL_RET(&regs->regs));
+ audit_syscall_entry(current,
+ HOST_AUDIT_ARCH,
+ UPT_SYSCALL_NR(regs),
+ UPT_SYSCALL_ARG1(regs),
+ UPT_SYSCALL_ARG2(regs),
+ UPT_SYSCALL_ARG3(regs),
+ UPT_SYSCALL_ARG4(regs));
+ else {
+ int res = UPT_SYSCALL_RET(regs);
+ audit_syscall_exit(current, AUDITSC_RESULT(res),
+ res);
+ }
}
/* Fake a debug trap */
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-08 06:57:05 +0000