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Cleanup: Move patches.i to include/generated/
[lttng-modules.git] / lttng-syscalls.c
diff --git a/lttng-syscalls.c b/lttng-syscalls.c
index 080355f4e00408922e609df45948c044dc1116a1..a5b5f403fe359e6531650111fc05cb82a6c60aba 100644 (file)
--- a/lttng-syscalls.c
+++ b/lttng-syscalls.c
@@ -1,23 +1,10 @@
-/*
+/* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
+ *
  * lttng-syscalls.c
  *
  * LTTng syscall probes.
  *
  * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; only
- * version 2.1 of the License.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 #include <linux/module.h>
@@ -31,14 +18,16 @@
 #include <linux/stringify.h>
 #include <linux/file.h>
 #include <linux/anon_inodes.h>
+#include <linux/fcntl.h>
 #include <asm/ptrace.h>
 #include <asm/syscall.h>
 
-#include <lib/bitfield.h>
+#include <lttng/bitfield.h>
 #include <wrapper/tracepoint.h>
 #include <wrapper/file.h>
 #include <wrapper/rcu.h>
-#include <lttng-events.h>
+#include <wrapper/syscall.h>
+#include <lttng/events.h>
 
 #ifndef CONFIG_COMPAT
 # ifndef is_compat_task
@@ -85,6 +74,18 @@ struct mmap_arg_struct;
 struct file_handle;
 struct user_msghdr;
 
+/*
+ * Forward declaration for kernels >= 5.6
+ */
+struct timex;
+struct timeval;
+struct itimerval;
+struct itimerspec;
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,6,0))
+typedef __kernel_old_time_t time_t;
+#endif
+
 #ifdef IA32_NR_syscalls
 #define NR_compat_syscalls IA32_NR_syscalls
 #else
@@ -157,6 +158,7 @@ struct user_msghdr;
 
 /* Hijack probe callback for compat system call enter */
 #define TP_PROBE_CB(_template)         &syscall_entry_probe
+#define LTTNG_SC_COMPAT
 #define SC_LTTNG_TRACEPOINT_EVENT(_name, _proto, _args, _fields) \
        LTTNG_TRACEPOINT_EVENT(compat_syscall_entry_##_name, PARAMS(_proto), PARAMS(_args), \
                PARAMS(_fields))
@@ -188,6 +190,7 @@ struct user_msghdr;
 #undef TP_PROBE_CB
 #undef _TRACE_SYSCALLS_INTEGERS_H
 #undef _TRACE_SYSCALLS_POINTERS_H
+#undef LTTNG_SC_COMPAT
 
 #undef SC_ENTER
 
@@ -239,6 +242,7 @@ struct user_msghdr;
 
 /* Hijack probe callback for compat system call exit */
 #define TP_PROBE_CB(_template)         &syscall_exit_probe
+#define LTTNG_SC_COMPAT
 #define SC_LTTNG_TRACEPOINT_EVENT(_name, _proto, _args, _fields) \
        LTTNG_TRACEPOINT_EVENT(compat_syscall_exit_##_name, PARAMS(_proto), PARAMS(_args), \
                PARAMS(_fields))
@@ -270,6 +274,7 @@ struct user_msghdr;
 #undef TP_PROBE_CB
 #undef _TRACE_SYSCALLS_INTEGERS_H
 #undef _TRACE_SYSCALLS_POINTERS_H
+#undef LTTNG_SC_COMPAT
 
 #undef SC_EXIT
 
@@ -370,9 +375,9 @@ struct lttng_syscall_filter {
 static void syscall_entry_unknown(struct lttng_event *event,
        struct pt_regs *regs, unsigned int id)
 {
-       unsigned long args[UNKNOWN_SYSCALL_NRARGS];
+       unsigned long args[LTTNG_SYSCALL_NR_ARGS];
 
-       syscall_get_arguments(current, regs, 0, UNKNOWN_SYSCALL_NRARGS, args);
+       lttng_syscall_get_arguments(current, regs, args);
        if (unlikely(in_compat_syscall()))
                __event_probe__compat_syscall_entry_unknown(event, id, args);
        else
@@ -441,9 +446,9 @@ void syscall_entry_probe(void *__data, struct pt_regs *regs, long id)
        case 1:
        {
                void (*fptr)(void *__data, unsigned long arg0) = entry->func;
-               unsigned long args[1];
+               unsigned long args[LTTNG_SYSCALL_NR_ARGS];
 
-               syscall_get_arguments(current, regs, 0, entry->nrargs, args);
+               lttng_syscall_get_arguments(current, regs, args);
                fptr(event, args[0]);
                break;
        }
@@ -452,9 +457,9 @@ void syscall_entry_probe(void *__data, struct pt_regs *regs, long id)
                void (*fptr)(void *__data,
                        unsigned long arg0,
                        unsigned long arg1) = entry->func;
-               unsigned long args[2];
+               unsigned long args[LTTNG_SYSCALL_NR_ARGS];
 
-               syscall_get_arguments(current, regs, 0, entry->nrargs, args);
+               lttng_syscall_get_arguments(current, regs, args);
                fptr(event, args[0], args[1]);
                break;
        }
@@ -464,9 +469,9 @@ void syscall_entry_probe(void *__data, struct pt_regs *regs, long id)
                        unsigned long arg0,
                        unsigned long arg1,
                        unsigned long arg2) = entry->func;
-               unsigned long args[3];
+               unsigned long args[LTTNG_SYSCALL_NR_ARGS];
 
-               syscall_get_arguments(current, regs, 0, entry->nrargs, args);
+               lttng_syscall_get_arguments(current, regs, args);
                fptr(event, args[0], args[1], args[2]);
                break;
        }
@@ -477,9 +482,9 @@ void syscall_entry_probe(void *__data, struct pt_regs *regs, long id)
                        unsigned long arg1,
                        unsigned long arg2,
                        unsigned long arg3) = entry->func;
-               unsigned long args[4];
+               unsigned long args[LTTNG_SYSCALL_NR_ARGS];
 
-               syscall_get_arguments(current, regs, 0, entry->nrargs, args);
+               lttng_syscall_get_arguments(current, regs, args);
                fptr(event, args[0], args[1], args[2], args[3]);
                break;
        }
@@ -491,9 +496,9 @@ void syscall_entry_probe(void *__data, struct pt_regs *regs, long id)
                        unsigned long arg2,
                        unsigned long arg3,
                        unsigned long arg4) = entry->func;
-               unsigned long args[5];
+               unsigned long args[LTTNG_SYSCALL_NR_ARGS];
 
-               syscall_get_arguments(current, regs, 0, entry->nrargs, args);
+               lttng_syscall_get_arguments(current, regs, args);
                fptr(event, args[0], args[1], args[2], args[3], args[4]);
                break;
        }
@@ -506,9 +511,9 @@ void syscall_entry_probe(void *__data, struct pt_regs *regs, long id)
                        unsigned long arg3,
                        unsigned long arg4,
                        unsigned long arg5) = entry->func;
-               unsigned long args[6];
+               unsigned long args[LTTNG_SYSCALL_NR_ARGS];
 
-               syscall_get_arguments(current, regs, 0, entry->nrargs, args);
+               lttng_syscall_get_arguments(current, regs, args);
                fptr(event, args[0], args[1], args[2],
                        args[3], args[4], args[5]);
                break;
@@ -521,9 +526,9 @@ void syscall_entry_probe(void *__data, struct pt_regs *regs, long id)
 static void syscall_exit_unknown(struct lttng_event *event,
        struct pt_regs *regs, int id, long ret)
 {
-       unsigned long args[UNKNOWN_SYSCALL_NRARGS];
+       unsigned long args[LTTNG_SYSCALL_NR_ARGS];
 
-       syscall_get_arguments(current, regs, 0, UNKNOWN_SYSCALL_NRARGS, args);
+       lttng_syscall_get_arguments(current, regs, args);
        if (unlikely(in_compat_syscall()))
                __event_probe__compat_syscall_exit_unknown(event, id, ret,
                        args);
@@ -597,9 +602,9 @@ void syscall_exit_probe(void *__data, struct pt_regs *regs, long ret)
                void (*fptr)(void *__data,
                        long ret,
                        unsigned long arg0) = entry->func;
-               unsigned long args[1];
+               unsigned long args[LTTNG_SYSCALL_NR_ARGS];
 
-               syscall_get_arguments(current, regs, 0, entry->nrargs, args);
+               lttng_syscall_get_arguments(current, regs, args);
                fptr(event, ret, args[0]);
                break;
        }
@@ -609,9 +614,9 @@ void syscall_exit_probe(void *__data, struct pt_regs *regs, long ret)
                        long ret,
                        unsigned long arg0,
                        unsigned long arg1) = entry->func;
-               unsigned long args[2];
+               unsigned long args[LTTNG_SYSCALL_NR_ARGS];
 
-               syscall_get_arguments(current, regs, 0, entry->nrargs, args);
+               lttng_syscall_get_arguments(current, regs, args);
                fptr(event, ret, args[0], args[1]);
                break;
        }
@@ -622,9 +627,9 @@ void syscall_exit_probe(void *__data, struct pt_regs *regs, long ret)
                        unsigned long arg0,
                        unsigned long arg1,
                        unsigned long arg2) = entry->func;
-               unsigned long args[3];
+               unsigned long args[LTTNG_SYSCALL_NR_ARGS];
 
-               syscall_get_arguments(current, regs, 0, entry->nrargs, args);
+               lttng_syscall_get_arguments(current, regs, args);
                fptr(event, ret, args[0], args[1], args[2]);
                break;
        }
@@ -636,9 +641,9 @@ void syscall_exit_probe(void *__data, struct pt_regs *regs, long ret)
                        unsigned long arg1,
                        unsigned long arg2,
                        unsigned long arg3) = entry->func;
-               unsigned long args[4];
+               unsigned long args[LTTNG_SYSCALL_NR_ARGS];
 
-               syscall_get_arguments(current, regs, 0, entry->nrargs, args);
+               lttng_syscall_get_arguments(current, regs, args);
                fptr(event, ret, args[0], args[1], args[2], args[3]);
                break;
        }
@@ -651,9 +656,9 @@ void syscall_exit_probe(void *__data, struct pt_regs *regs, long ret)
                        unsigned long arg2,
                        unsigned long arg3,
                        unsigned long arg4) = entry->func;
-               unsigned long args[5];
+               unsigned long args[LTTNG_SYSCALL_NR_ARGS];
 
-               syscall_get_arguments(current, regs, 0, entry->nrargs, args);
+               lttng_syscall_get_arguments(current, regs, args);
                fptr(event, ret, args[0], args[1], args[2], args[3], args[4]);
                break;
        }
@@ -667,9 +672,9 @@ void syscall_exit_probe(void *__data, struct pt_regs *regs, long ret)
                        unsigned long arg3,
                        unsigned long arg4,
                        unsigned long arg5) = entry->func;
-               unsigned long args[6];
+               unsigned long args[LTTNG_SYSCALL_NR_ARGS];
 
-               syscall_get_arguments(current, regs, 0, entry->nrargs, args);
+               lttng_syscall_get_arguments(current, regs, args);
                fptr(event, ret, args[0], args[1], args[2],
                        args[3], args[4], args[5]);
                break;
@@ -756,7 +761,7 @@ int lttng_syscalls_register(struct lttng_channel *chan, void *filter)
        struct lttng_kernel_event ev;
        int ret;
 
-       wrapper_vmalloc_sync_all();
+       wrapper_vmalloc_sync_mappings();
 
        if (!chan->sc_table) {
                /* create syscall table mapping syscall to events */
@@ -913,15 +918,15 @@ int lttng_syscalls_unregister(struct lttng_channel *chan)
        if (!chan->sc_table)
                return 0;
        if (chan->sys_enter_registered) {
-               ret = lttng_wrapper_tracepoint_probe_unregister("sys_exit",
-                               (void *) syscall_exit_probe, chan);
+               ret = lttng_wrapper_tracepoint_probe_unregister("sys_enter",
+                               (void *) syscall_entry_probe, chan);
                if (ret)
                        return ret;
                chan->sys_enter_registered = 0;
        }
        if (chan->sys_exit_registered) {
-               ret = lttng_wrapper_tracepoint_probe_unregister("sys_enter",
-                               (void *) syscall_entry_probe, chan);
+               ret = lttng_wrapper_tracepoint_probe_unregister("sys_exit",
+                               (void *) syscall_exit_probe, chan);
                if (ret)
                        return ret;
                chan->sys_exit_registered = 0;
@@ -1255,7 +1260,7 @@ long lttng_channel_syscall_mask(struct lttng_channel *channel,
        filter = channel->sc_filter;
 
        for (bit = 0; bit < ARRAY_SIZE(sc_table); bit++) {
-               bool state;
+               char state;
 
                if (channel->sc_table) {
                        if (filter)
@@ -1268,7 +1273,7 @@ long lttng_channel_syscall_mask(struct lttng_channel *channel,
                bt_bitfield_write_be(tmp_mask, char, bit, 1, state);
        }
        for (; bit < sc_tables_len; bit++) {
-               bool state;
+               char state;
 
                if (channel->compat_sc_table) {
                        if (filter)
LTTng 2.0/0.x modules
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