summaryrefslogtreecommitdiffstats
path: root/include/asm-x86/ptrace_32.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/asm-x86/ptrace_32.h')
-rw-r--r--include/asm-x86/ptrace_32.h63
1 files changed, 63 insertions, 0 deletions
diff --git a/include/asm-x86/ptrace_32.h b/include/asm-x86/ptrace_32.h
new file mode 100644
index 000000000000..6002597b9e12
--- /dev/null
+++ b/include/asm-x86/ptrace_32.h
@@ -0,0 +1,63 @@
+#ifndef _I386_PTRACE_H
+#define _I386_PTRACE_H
+
+#include <asm/ptrace-abi.h>
+
+/* this struct defines the way the registers are stored on the
+ stack during a system call. */
+
+struct pt_regs {
+ long ebx;
+ long ecx;
+ long edx;
+ long esi;
+ long edi;
+ long ebp;
+ long eax;
+ int xds;
+ int xes;
+ int xfs;
+ /* int xgs; */
+ long orig_eax;
+ long eip;
+ int xcs;
+ long eflags;
+ long esp;
+ int xss;
+};
+
+#ifdef __KERNEL__
+
+#include <asm/vm86.h>
+#include <asm/segment.h>
+
+struct task_struct;
+extern void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs, int error_code);
+
+/*
+ * user_mode_vm(regs) determines whether a register set came from user mode.
+ * This is true if V8086 mode was enabled OR if the register set was from
+ * protected mode with RPL-3 CS value. This tricky test checks that with
+ * one comparison. Many places in the kernel can bypass this full check
+ * if they have already ruled out V8086 mode, so user_mode(regs) can be used.
+ */
+static inline int user_mode(struct pt_regs *regs)
+{
+ return (regs->xcs & SEGMENT_RPL_MASK) == USER_RPL;
+}
+static inline int user_mode_vm(struct pt_regs *regs)
+{
+ return ((regs->xcs & SEGMENT_RPL_MASK) | (regs->eflags & VM_MASK)) >= USER_RPL;
+}
+static inline int v8086_mode(struct pt_regs *regs)
+{
+ return (regs->eflags & VM_MASK);
+}
+
+#define instruction_pointer(regs) ((regs)->eip)
+#define regs_return_value(regs) ((regs)->eax)
+
+extern unsigned long profile_pc(struct pt_regs *regs);
+#endif /* __KERNEL__ */
+
+#endif