include/instrumentation/events/arch/x86/exceptions.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 #if !defined(LTTNG_TRACE_EXCEPTIONS_H) || defined(TRACE_HEADER_MULTI_READ)
   3 #define LTTNG_TRACE_EXCEPTIONS_H
   4
   5 #include <lttng/tracepoint-event.h>
   6 #include <lttng/kernel-version.h>
   7
   8 #ifdef CONFIG_LTTNG_EXPERIMENTAL_BITWISE_ENUM
   9 #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,15,0))
  10 #include <../arch/x86/include/asm/traps.h>
  11 #else /* #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,15,0)) */
  12
  13 /* Only define this enum once. */
  14
  15 #ifndef ONCE_LTTNG_EXCEPTIONS_H
  16 #define ONCE_LTTNG_EXCEPTIONS_H
  17
  18 enum {
  19         X86_PF_PROT =   1 << 0,
  20         X86_PF_WRITE =  1 << 1,
  21         X86_PF_USER =   1 << 2,
  22         X86_PF_RSVD =   1 << 3,
  23         X86_PF_INSTR =  1 << 4,
  24 #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,6,0))
  25         X86_PF_PK =     1 << 5,
  26 #endif /* #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,6,0)) */
  27 };
  28
  29 #endif /* ONCE_LTTNG_EXCEPTIONS_H */
  30
  31 #endif /* #else #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,15,0)) */
  32 #endif /* CONFIG_LTTNG_EXPERIMENTAL_BITWISE_ENUM */
  33
  34 #undef TRACE_SYSTEM
  35 #define TRACE_SYSTEM x86_exceptions
  36
  37 #ifdef CONFIG_LTTNG_EXPERIMENTAL_BITWISE_ENUM
  38 LTTNG_TRACEPOINT_ENUM(lttng_x86_pf_error_code,
  39         TP_ENUM_VALUES(
  40                 ctf_enum_value("PROTECTION_FAULT",      X86_PF_PROT)
  41                 ctf_enum_value("WRITE_ACCESS",          X86_PF_WRITE)
  42                 ctf_enum_value("USER_MODE",             X86_PF_USER)
  43                 ctf_enum_value("RESERVED_BIT",          X86_PF_RSVD)
  44                 ctf_enum_value("INSTRUCTION_FETCH",     X86_PF_INSTR)
  45 #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,6,0))
  46                 ctf_enum_value("PROTECTION_KEYS_BLOCK", X86_PF_PK)
  47 #endif /* #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,6,0)) */
  48         )
  49 )
  50 #endif /* CONFIG_LTTNG_EXPERIMENTAL_BITWISE_ENUM */
  51
  52 LTTNG_TRACEPOINT_EVENT_CLASS(x86_exceptions_class,
  53
  54         TP_PROTO(unsigned long address, struct pt_regs *regs,
  55                 unsigned long error_code),
  56
  57         TP_ARGS(address, regs, error_code),
  58
  59         TP_FIELDS(
  60                 ctf_integer_hex(unsigned long, address, address)
  61                 ctf_integer_hex(unsigned long, ip, regs->ip)
  62                 /*
  63                  * Note: we cast error_code from unsigned long
  64                  * to unsigned char to save space in the trace.
  65                  * Currently, only 5 low bits are used. Should be made
  66                  * larger if error codes are added to the kernel.
  67                  */
  68 #ifdef CONFIG_LTTNG_EXPERIMENTAL_BITWISE_ENUM
  69                 ctf_enum(lttng_x86_pf_error_code, unsigned char, error_code, error_code)
  70 #else
  71                 ctf_integer_hex(unsigned char, error_code, error_code)
  72 #endif
  73         )
  74 )
  75
  76 #define LTTNG_EXCEPTIONS_TRACEPOINT_EVENT_INSTANCE_MAP(name, map)       \
  77 LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(x86_exceptions_class,               \
  78         name,                                                           \
  79         map,                                                            \
  80         TP_PROTO(unsigned long address, struct pt_regs *regs,           \
  81                 unsigned long error_code),                              \
  82         TP_ARGS(address, regs, error_code)                              \
  83 )
  84
  85 LTTNG_EXCEPTIONS_TRACEPOINT_EVENT_INSTANCE_MAP(page_fault_user,
  86                 x86_exceptions_page_fault_user)
  87 LTTNG_EXCEPTIONS_TRACEPOINT_EVENT_INSTANCE_MAP(page_fault_kernel,
  88                 x86_exceptions_page_fault_kernel)
  89
  90 #endif /* LTTNG_TRACE_EXCEPTIONS_H */
  91
  92 #undef TRACE_INCLUDE_PATH
  93 #define TRACE_INCLUDE_PATH instrumentation/events/arch/x86
  94 #undef TRACE_INCLUDE_FILE
  95 #define TRACE_INCLUDE_FILE exceptions
  96
  97 /* This part must be outside protection */
  98 #include <lttng/define_trace.h>