Explicitly skip tracing x32 system calls
[lttng-modules.git] / src / lttng-syscalls.c
index 9cd11ea6e9b8394f77354be40cc320dd9e230a92..9cb0537a3e8b0e2ea38a4c5b42fcc3340d26f9b2 100644 (file)
@@ -25,7 +25,6 @@
 
 #include <lttng/bitfield.h>
 #include <wrapper/tracepoint.h>
-#include <wrapper/file.h>
 #include <wrapper/rcu.h>
 #include <wrapper/syscall.h>
 #include <wrapper/limits.h>
@@ -242,6 +241,12 @@ void syscall_entry_event_probe(void *__data, struct pt_regs *regs, long id)
        const struct trace_syscall_entry *table, *entry;
        size_t table_len;
 
+#ifdef CONFIG_X86_X32_ABI
+       if (in_x32_syscall()) {
+               /* x32 system calls are not supported. */
+               return;
+       }
+#endif
        if (unlikely(in_compat_syscall())) {
                struct lttng_syscall_filter *filter = syscall_table->sc_filter;
 
@@ -420,6 +425,12 @@ void syscall_exit_event_probe(void *__data, struct pt_regs *regs, long ret)
        size_t table_len;
        long id;
 
+#ifdef CONFIG_X86_X32_ABI
+       if (in_x32_syscall()) {
+               /* x32 system calls are not supported. */
+               return;
+       }
+#endif
        id = syscall_get_nr(current, regs);
 
        if (unlikely(in_compat_syscall())) {
@@ -797,17 +808,17 @@ int lttng_event_enabler_create_syscall_events_if_missing(struct lttng_event_enab
        }
 
        if (!syscall_table->sys_enter_registered) {
-               ret = lttng_wrapper_tracepoint_probe_register("sys_enter",
+               ret = lttng_tracepoint_probe_register("sys_enter",
                                (void *) syscall_entry_event_probe, syscall_table);
                if (ret)
                        return ret;
                syscall_table->sys_enter_registered = 1;
        }
        if (!syscall_table->sys_exit_registered) {
-               ret = lttng_wrapper_tracepoint_probe_register("sys_exit",
+               ret = lttng_tracepoint_probe_register("sys_exit",
                                (void *) syscall_exit_event_probe, syscall_table);
                if (ret) {
-                       WARN_ON_ONCE(lttng_wrapper_tracepoint_probe_unregister("sys_enter",
+                       WARN_ON_ONCE(lttng_tracepoint_probe_unregister("sys_enter",
                                (void *) syscall_entry_event_probe, syscall_table));
                        return ret;
                }
@@ -826,14 +837,14 @@ int lttng_syscalls_unregister_syscall_table(struct lttng_kernel_syscall_table *s
        if (!syscall_table->syscall_dispatch)
                return 0;
        if (syscall_table->sys_enter_registered) {
-               ret = lttng_wrapper_tracepoint_probe_unregister("sys_enter",
+               ret = lttng_tracepoint_probe_unregister("sys_enter",
                                (void *) syscall_entry_event_probe, syscall_table);
                if (ret)
                        return ret;
                syscall_table->sys_enter_registered = 0;
        }
        if (syscall_table->sys_exit_registered) {
-               ret = lttng_wrapper_tracepoint_probe_unregister("sys_exit",
+               ret = lttng_tracepoint_probe_unregister("sys_exit",
                                (void *) syscall_exit_event_probe, syscall_table);
                if (ret)
                        return ret;
@@ -1297,7 +1308,7 @@ int lttng_abi_syscall_list(void)
        struct file *syscall_list_file;
        int file_fd, ret;
 
-       file_fd = lttng_get_unused_fd();
+       file_fd = get_unused_fd_flags(0);
        if (file_fd < 0) {
                ret = file_fd;
                goto fd_error;
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