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authorAl Viro <viro@zeniv.linux.org.uk>2008-08-17 21:05:42 -0400
committerH. Peter Anvin <hpa@zytor.com>2008-10-22 22:55:20 -0700
commitbb8985586b7a906e116db835c64773b7a7d51663 (patch)
treede93ae58e88cc563d95cc124a73f3930594c6100 /arch/x86/include/asm/ptrace.h
parent8ede0bdb63305d3353efd97e9af6210afb05734e (diff)
x86, um: ... and asm-x86 move
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'arch/x86/include/asm/ptrace.h')
-rw-r--r--arch/x86/include/asm/ptrace.h280
1 files changed, 280 insertions, 0 deletions
diff --git a/arch/x86/include/asm/ptrace.h b/arch/x86/include/asm/ptrace.h
new file mode 100644
index 00000000000..a2025525a15
--- /dev/null
+++ b/arch/x86/include/asm/ptrace.h
@@ -0,0 +1,280 @@
+#ifndef ASM_X86__PTRACE_H
+#define ASM_X86__PTRACE_H
+
+#include <linux/compiler.h> /* For __user */
+#include <asm/ptrace-abi.h>
+#include <asm/processor-flags.h>
+
+#ifdef __KERNEL__
+#include <asm/ds.h> /* the DS BTS struct is used for ptrace too */
+#include <asm/segment.h>
+#endif
+
+#ifndef __ASSEMBLY__
+
+#ifdef __i386__
+/* this struct defines the way the registers are stored on the
+ stack during a system call. */
+
+#ifndef __KERNEL__
+
+struct pt_regs {
+ long ebx;
+ long ecx;
+ long edx;
+ long esi;
+ long edi;
+ long ebp;
+ long eax;
+ int xds;
+ int xes;
+ int xfs;
+ /* int gs; */
+ long orig_eax;
+ long eip;
+ int xcs;
+ long eflags;
+ long esp;
+ int xss;
+};
+
+#else /* __KERNEL__ */
+
+struct pt_regs {
+ unsigned long bx;
+ unsigned long cx;
+ unsigned long dx;
+ unsigned long si;
+ unsigned long di;
+ unsigned long bp;
+ unsigned long ax;
+ unsigned long ds;
+ unsigned long es;
+ unsigned long fs;
+ /* int gs; */
+ unsigned long orig_ax;
+ unsigned long ip;
+ unsigned long cs;
+ unsigned long flags;
+ unsigned long sp;
+ unsigned long ss;
+};
+
+#endif /* __KERNEL__ */
+
+#else /* __i386__ */
+
+#ifndef __KERNEL__
+
+struct pt_regs {
+ unsigned long r15;
+ unsigned long r14;
+ unsigned long r13;
+ unsigned long r12;
+ unsigned long rbp;
+ unsigned long rbx;
+/* arguments: non interrupts/non tracing syscalls only save upto here*/
+ unsigned long r11;
+ unsigned long r10;
+ unsigned long r9;
+ unsigned long r8;
+ unsigned long rax;
+ unsigned long rcx;
+ unsigned long rdx;
+ unsigned long rsi;
+ unsigned long rdi;
+ unsigned long orig_rax;
+/* end of arguments */
+/* cpu exception frame or undefined */
+ unsigned long rip;
+ unsigned long cs;
+ unsigned long eflags;
+ unsigned long rsp;
+ unsigned long ss;
+/* top of stack page */
+};
+
+#else /* __KERNEL__ */
+
+struct pt_regs {
+ unsigned long r15;
+ unsigned long r14;
+ unsigned long r13;
+ unsigned long r12;
+ unsigned long bp;
+ unsigned long bx;
+/* arguments: non interrupts/non tracing syscalls only save upto here*/
+ unsigned long r11;
+ unsigned long r10;
+ unsigned long r9;
+ unsigned long r8;
+ unsigned long ax;
+ unsigned long cx;
+ unsigned long dx;
+ unsigned long si;
+ unsigned long di;
+ unsigned long orig_ax;
+/* end of arguments */
+/* cpu exception frame or undefined */
+ unsigned long ip;
+ unsigned long cs;
+ unsigned long flags;
+ unsigned long sp;
+ unsigned long ss;
+/* top of stack page */
+};
+
+#endif /* __KERNEL__ */
+#endif /* !__i386__ */
+
+
+#ifdef CONFIG_X86_PTRACE_BTS
+/* a branch trace record entry
+ *
+ * In order to unify the interface between various processor versions,
+ * we use the below data structure for all processors.
+ */
+enum bts_qualifier {
+ BTS_INVALID = 0,
+ BTS_BRANCH,
+ BTS_TASK_ARRIVES,
+ BTS_TASK_DEPARTS
+};
+
+struct bts_struct {
+ __u64 qualifier;
+ union {
+ /* BTS_BRANCH */
+ struct {
+ __u64 from_ip;
+ __u64 to_ip;
+ } lbr;
+ /* BTS_TASK_ARRIVES or
+ BTS_TASK_DEPARTS */
+ __u64 jiffies;
+ } variant;
+};
+#endif /* CONFIG_X86_PTRACE_BTS */
+
+#ifdef __KERNEL__
+
+#include <linux/init.h>
+
+struct cpuinfo_x86;
+struct task_struct;
+
+#ifdef CONFIG_X86_PTRACE_BTS
+extern void __cpuinit ptrace_bts_init_intel(struct cpuinfo_x86 *);
+extern void ptrace_bts_take_timestamp(struct task_struct *, enum bts_qualifier);
+#else
+#define ptrace_bts_init_intel(config) do {} while (0)
+#endif /* CONFIG_X86_PTRACE_BTS */
+
+extern unsigned long profile_pc(struct pt_regs *regs);
+
+extern unsigned long
+convert_ip_to_linear(struct task_struct *child, struct pt_regs *regs);
+extern void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs,
+ int error_code, int si_code);
+void signal_fault(struct pt_regs *regs, void __user *frame, char *where);
+
+extern long syscall_trace_enter(struct pt_regs *);
+extern void syscall_trace_leave(struct pt_regs *);
+
+static inline unsigned long regs_return_value(struct pt_regs *regs)
+{
+ return regs->ax;
+}
+
+/*
+ * 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)
+{
+#ifdef CONFIG_X86_32
+ return (regs->cs & SEGMENT_RPL_MASK) == USER_RPL;
+#else
+ return !!(regs->cs & 3);
+#endif
+}
+
+static inline int user_mode_vm(struct pt_regs *regs)
+{
+#ifdef CONFIG_X86_32
+ return ((regs->cs & SEGMENT_RPL_MASK) | (regs->flags & X86_VM_MASK)) >=
+ USER_RPL;
+#else
+ return user_mode(regs);
+#endif
+}
+
+static inline int v8086_mode(struct pt_regs *regs)
+{
+#ifdef CONFIG_X86_32
+ return (regs->flags & X86_VM_MASK);
+#else
+ return 0; /* No V86 mode support in long mode */
+#endif
+}
+
+/*
+ * X86_32 CPUs don't save ss and esp if the CPU is already in kernel mode
+ * when it traps. So regs will be the current sp.
+ *
+ * This is valid only for kernel mode traps.
+ */
+static inline unsigned long kernel_trap_sp(struct pt_regs *regs)
+{
+#ifdef CONFIG_X86_32
+ return (unsigned long)regs;
+#else
+ return regs->sp;
+#endif
+}
+
+static inline unsigned long instruction_pointer(struct pt_regs *regs)
+{
+ return regs->ip;
+}
+
+static inline unsigned long frame_pointer(struct pt_regs *regs)
+{
+ return regs->bp;
+}
+
+static inline unsigned long user_stack_pointer(struct pt_regs *regs)
+{
+ return regs->sp;
+}
+
+/*
+ * These are defined as per linux/ptrace.h, which see.
+ */
+#define arch_has_single_step() (1)
+extern void user_enable_single_step(struct task_struct *);
+extern void user_disable_single_step(struct task_struct *);
+
+extern void user_enable_block_step(struct task_struct *);
+#ifdef CONFIG_X86_DEBUGCTLMSR
+#define arch_has_block_step() (1)
+#else
+#define arch_has_block_step() (boot_cpu_data.x86 >= 6)
+#endif
+
+struct user_desc;
+extern int do_get_thread_area(struct task_struct *p, int idx,
+ struct user_desc __user *info);
+extern int do_set_thread_area(struct task_struct *p, int idx,
+ struct user_desc __user *info, int can_allocate);
+
+#define __ARCH_WANT_COMPAT_SYS_PTRACE
+
+#endif /* __KERNEL__ */
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* ASM_X86__PTRACE_H */