* Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
* Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
* Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
- * Copyright (c) 2001-2017 The strace developers.
+ * Copyright (c) 2001-2018 The strace developers.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
#include <time.h>
#include <sys/time.h>
+#include "arch_defs.h"
#include "error_prints.h"
#include "gcc_compat.h"
#include "kernel_types.h"
#include "macros.h"
#include "mpers_type.h"
#include "string_to_uint.h"
-#include "supported_personalities.h"
#include "sysent.h"
#include "xmalloc.h"
# define PERSONALITY1_INCLUDE_PRINTERS_DEFS "m32_printer_defs.h"
# define PERSONALITY1_INCLUDE_FUNCS "m32_funcs.h"
# define MPERS_m32_IOCTL_MACROS "ioctl_redefs1.h"
+# define HAVE_PERSONALITY_1_MPERS 1
#else
# define PERSONALITY1_INCLUDE_PRINTERS_DECLS "native_printer_decls.h"
# define PERSONALITY1_INCLUDE_PRINTERS_DEFS "native_printer_defs.h"
# define PERSONALITY1_INCLUDE_FUNCS "empty.h"
+# define HAVE_PERSONALITY_1_MPERS 0
#endif
#if SUPPORTED_PERSONALITIES > 2 && defined HAVE_MX32_MPERS
# define PERSONALITY2_INCLUDE_PRINTERS_DECLS "mx32_printer_decls.h"
# define PERSONALITY2_INCLUDE_PRINTERS_DEFS "mx32_printer_defs.h"
# define MPERS_mx32_IOCTL_MACROS "ioctl_redefs2.h"
+# define HAVE_PERSONALITY_2_MPERS 1
#else
# define PERSONALITY2_INCLUDE_PRINTERS_DECLS "native_printer_decls.h"
# define PERSONALITY2_INCLUDE_PRINTERS_DEFS "native_printer_defs.h"
# define PERSONALITY2_INCLUDE_FUNCS "empty.h"
+# define HAVE_PERSONALITY_2_MPERS 0
#endif
typedef struct ioctlent {
struct inject_data {
uint16_t flags;
uint16_t signo;
- int rval;
+ kernel_long_t rval;
};
struct inject_opts {
struct timeval dtime; /* Delta for system time usage */
struct timeval etime; /* Syscall entry time */
-#ifdef USE_LIBUNWIND
- struct UPT_info *libunwind_ui;
struct mmap_cache_t *mmap_cache;
unsigned int mmap_cache_size;
unsigned int mmap_cache_generation;
+
+#ifdef USE_LIBUNWIND
+ struct UPT_info *libunwind_ui;
struct queue_t *queue;
#endif
};
#define TCB_TAMPERED 0x40 /* A syscall has been tampered with */
#define TCB_HIDE_LOG 0x80 /* We should hide everything (until execve) */
#define TCB_SKIP_DETACH_ON_FIRST_EXEC 0x100 /* -b execve should skip detach on first execve */
-#define TCB_GRABBED 0x200 /* We grab the process and can catch it
- * in the middle of a syscall */
+#define TCB_GRABBED 0x200 /* We grab the process and can catch it
+ * in the middle of a syscall */
+#define TCB_RECOVERING 0x400 /* We try to recover after detecting incorrect
+ * syscall entering/exiting state */
/* qualifier flags */
#define QUAL_TRACE 0x001 /* this system call should be traced */
#define inject(tcp) ((tcp)->qual_flg & QUAL_INJECT)
#define filtered(tcp) ((tcp)->flags & TCB_FILTERED)
#define hide_log(tcp) ((tcp)->flags & TCB_HIDE_LOG)
+#define syscall_tampered(tcp) ((tcp)->flags & TCB_TAMPERED)
+#define recovering(tcp) ((tcp)->flags & TCB_RECOVERING)
#include "xlat.h"
#define RVAL_DECODED 0100 /* syscall decoding finished */
#define RVAL_IOCTL_DECODED 0200 /* ioctl sub-parser successfully decoded
the argument */
+#define RVAL_PRINT_ERR_VAL 0400 /* Print decoded error code along with
+ syscall return value. Needed for modify_ldt
+ that for some reason decides to return
+ an error with higher bits set to 0. */
#define IOCTL_NUMBER_UNKNOWN 0
#define IOCTL_NUMBER_HANDLED 1
#define indirect_ipccall(tcp) (tcp->s_ent->sys_flags & TRACE_INDIRECT_SUBCALL)
-#if defined(ARM) || defined(AARCH64) \
- || defined(I386) || defined(X32) || defined(X86_64) \
- || defined(IA64) \
- || defined(BFIN) \
- || defined(M68K) \
- || defined(MICROBLAZE) \
- || defined(RISCV) \
- || defined(S390) \
- || defined(SH) || defined(SH64) \
- || defined(SPARC) || defined(SPARC64) \
- /**/
-# define NEED_UID16_PARSERS 1
-#else
-# define NEED_UID16_PARSERS 0
-#endif
-
enum sock_proto {
SOCK_PROTO_UNKNOWN,
SOCK_PROTO_UNIX,
#undef KERNEL_VERSION
#define KERNEL_VERSION(a, b, c) (((a) << 16) + ((b) << 8) + (c))
-extern int read_int_from_file(const char *, int *);
+extern int read_int_from_file(struct tcb *, const char *, int *);
extern void set_sortby(const char *);
extern void set_overhead(int);
extern void count_syscall(struct tcb *, const struct timeval *);
extern void call_summary(FILE *);
-extern void clear_regs(void);
+extern void clear_regs(struct tcb *tcp);
extern int get_scno(struct tcb *);
extern kernel_ulong_t get_rt_sigframe_addr(struct tcb *);
/**
- * Convert syscall number to syscall name.
+ * Convert a (shuffled) syscall number to the corresponding syscall name.
*
* @param scno Syscall number.
* @return String literal corresponding to the syscall number in case latter
* is valid; NULL otherwise.
*/
extern const char *syscall_name(kernel_ulong_t scno);
+/**
+ * Convert a syscall name to the corresponding (shuffled) syscall number.
+ *
+ * @param s Syscall name.
+ * @param p Personality.
+ * @param start From which position in syscall entry table resume the search.
+ * @return Shuffled syscall number (ready to use against sysent_vec)
+ * if syscall name is found; -1 otherwise.
+ */
+extern kernel_long_t scno_by_name(const char *s, unsigned p,
+ kernel_long_t start);
+/**
+ * Shuffle syscall numbers so that we don't have huge gaps in syscall table.
+ * The shuffling should be an involution: shuffle_scno(shuffle_scno(n)) == n.
+ *
+ * @param scno Raw or shuffled syscall number.
+ * @return Shuffled or raw syscall number, respectively.
+ */
+extern kernel_ulong_t shuffle_scno(kernel_ulong_t scno);
extern const char *err_name(unsigned long err);
extern bool is_erestart(struct tcb *);
extern int
umovestr(struct tcb *, kernel_ulong_t addr, unsigned int len, char *laddr);
-extern int upeek(int pid, unsigned long, kernel_ulong_t *);
+extern int upeek(struct tcb *tcp, unsigned long, kernel_ulong_t *);
extern int upoke(struct tcb *tcp, unsigned long, kernel_ulong_t);
extern bool
void *opaque_data),
void *opaque_data);
-#if defined ALPHA || defined IA64 || defined MIPS \
- || defined SH || defined SPARC || defined SPARC64
-# define HAVE_GETRVAL2
+#if HAVE_ARCH_GETRVAL2
extern long getrval2(struct tcb *);
-#else
-# undef HAVE_GETRVAL2
#endif
extern const char *signame(const int);
const struct xlat *dyxlat_get(const struct dyxlat *);
void dyxlat_add_pair(struct dyxlat *, uint64_t val, const char *str, size_t len);
-const struct xlat *genl_families_xlat(void);
+const struct xlat *genl_families_xlat(struct tcb *tcp);
extern unsigned long get_pagesize(void);
extern int next_set_bit(const void *bit_array, unsigned cur_bit, unsigned size_bits);
#define QUOTE_OMIT_LEADING_TRAILING_QUOTES 0x02
#define QUOTE_OMIT_TRAILING_0 0x08
#define QUOTE_FORCE_HEX 0x10
+#define QUOTE_EMIT_COMMENT 0x20
extern int string_quote(const char *, char *, unsigned int, unsigned int);
extern int print_quoted_string(const char *, unsigned int, unsigned int);
uint64_t val, const char *dflt);
#define printxval_search(xlat__, val__, dflt__) \
printxval_searchn(xlat__, ARRAY_SIZE(xlat__), val__, dflt__)
+extern int sprintxval(char *buf, size_t size, const struct xlat *,
+ unsigned int val, const char *dflt);
extern int printargs(struct tcb *);
extern int printargs_u(struct tcb *);
extern int printargs_d(struct tcb *);
extern void print_dev_t(unsigned long long dev);
extern void print_abnormal_hi(kernel_ulong_t);
+extern kernel_ulong_t *
+fetch_indirect_syscall_args(struct tcb *, kernel_ulong_t addr, unsigned int n_args);
+
extern void
dumpiov_in_msghdr(struct tcb *, kernel_ulong_t addr, kernel_ulong_t data_size);
extern void
dumpstr(struct tcb *, kernel_ulong_t addr, int len);
-extern void
+extern int
printstr_ex(struct tcb *, kernel_ulong_t addr, kernel_ulong_t len,
unsigned int user_style);
-extern void
+extern int
printpathn(struct tcb *, kernel_ulong_t addr, unsigned int n);
-extern void
+extern int
printpath(struct tcb *, kernel_ulong_t addr);
#define TIMESPEC_TEXT_BUFSIZE \
extern void unwind_init(void);
extern void unwind_tcb_init(struct tcb *);
extern void unwind_tcb_fin(struct tcb *);
-extern void unwind_cache_invalidate(struct tcb *);
extern void unwind_print_stacktrace(struct tcb *);
extern void unwind_capture_stacktrace(struct tcb *);
#endif
-static inline void
+/*
+ * Keep a sorted array of cache entries,
+ * so that we can binary search through it.
+ */
+struct mmap_cache_t {
+ /**
+ * example entry:
+ * 7fabbb09b000-7fabbb09f000 r-xp 00179000 fc:00 1180246 /lib/libc-2.11.1.so
+ *
+ * start_addr is 0x7fabbb09b000
+ * end_addr is 0x7fabbb09f000
+ * mmap_offset is 0x179000
+ * protections is MMAP_CACHE_PROT_READABLE|MMAP_CACHE_PROT_EXECUTABLE
+ * binary_filename is "/lib/libc-2.11.1.so"
+ */
+ unsigned long start_addr;
+ unsigned long end_addr;
+ unsigned long mmap_offset;
+ unsigned char protections;
+ char *binary_filename;
+};
+
+enum mmap_cache_protection {
+ MMAP_CACHE_PROT_READABLE = 1 << 0,
+ MMAP_CACHE_PROT_WRITABLE = 1 << 1,
+ MMAP_CACHE_PROT_EXECUTABLE = 1 << 2,
+ MMAP_CACHE_PROT_SHARED = 1 << 3,
+};
+
+enum mmap_cache_rebuild_result {
+ MMAP_CACHE_REBUILD_NOCACHE,
+ MMAP_CACHE_REBUILD_READY,
+ MMAP_CACHE_REBUILD_RENEWED,
+};
+
+extern void mmap_cache_enable(void);
+extern bool mmap_cache_is_enabled(void);
+extern void mmap_cache_invalidate(struct tcb *tcp);
+extern void mmap_cache_delete(struct tcb *tcp, const char *caller);
+extern enum mmap_cache_rebuild_result mmap_cache_rebuild_if_invalid(struct tcb *tcp, const char *caller);
+extern struct mmap_cache_t *mmap_cache_search(struct tcb *tcp, unsigned long ip);
+
+static inline int
printstrn(struct tcb *tcp, kernel_ulong_t addr, kernel_ulong_t len)
{
- printstr_ex(tcp, addr, len, 0);
+ return printstr_ex(tcp, addr, len, 0);
}
-static inline void
+static inline int
printstr(struct tcb *tcp, kernel_ulong_t addr)
{
- printstr_ex(tcp, addr, -1, QUOTE_0_TERMINATED);
+ return printstr_ex(tcp, addr, -1, QUOTE_0_TERMINATED);
}
static inline int
#endif
#ifdef HAVE_STRUCT_USER_DESC
-extern void print_user_desc(struct tcb *, kernel_ulong_t addr);
+/**
+ * Filter what to print from the point of view of the get_thread_area syscall.
+ * Kernel copies only entry_number field at first and then tries to write the
+ * whole structure.
+ */
+enum user_desc_print_filter {
+ /* Print the "entering" part of struct user_desc - entry_number. */
+ USER_DESC_ENTERING = 1,
+ /* Print the "exiting" part of the structure. */
+ USER_DESC_EXITING = 2,
+ USER_DESC_BOTH = USER_DESC_ENTERING | USER_DESC_EXITING,
+};
+
+extern void print_user_desc(struct tcb *, kernel_ulong_t addr,
+ enum user_desc_print_filter filter);
#endif
/* Strace log generation machinery.
extern void tprints_comment(const char *str);
#if SUPPORTED_PERSONALITIES > 1
-extern void set_personality(int personality);
+extern void set_personality(unsigned int personality);
extern unsigned current_personality;
#else
# define set_personality(personality) ((void)0)
# endif
#endif
-#define ANY_WORDSIZE_LESS_THAN_KERNEL_LONG \
- (SIZEOF_KERNEL_LONG_T > 4 \
- && (SIZEOF_LONG < SIZEOF_KERNEL_LONG_T || !defined(current_wordsize)))
+#if SIZEOF_KERNEL_LONG_T > 4 \
+ && (SIZEOF_LONG < SIZEOF_KERNEL_LONG_T || !defined(current_wordsize))
+# define ANY_WORDSIZE_LESS_THAN_KERNEL_LONG 1
+#else
+# define ANY_WORDSIZE_LESS_THAN_KERNEL_LONG 0
+#endif
#define DECL_PRINTNUM(name) \
extern bool \
extern const char *const signalent0[];
extern const struct_ioctlent ioctlent0[];
+extern const char *const personality_names[];
+
#if SUPPORTED_PERSONALITIES > 1
extern const struct_sysent *sysent;
extern const char *const *errnoent;
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