X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=instrumentation%2Fsyscalls%2Fheaders%2Fx86-64-syscalls_pointers_override.h;fp=instrumentation%2Fsyscalls%2Fheaders%2Fx86-64-syscalls_pointers_override.h;h=93fa7b57eefea3f1aadb5373e914c4e618e710ac;hb=6314c2d3a4ad617f5f122083a7fda007d4319b92;hp=0000000000000000000000000000000000000000;hpb=9143c6d5444e809b9d411c07a8dae94c151668ae;p=lttng-modules.git

diff --git a/instrumentation/syscalls/headers/x86-64-syscalls_pointers_override.h b/instrumentation/syscalls/headers/x86-64-syscalls_pointers_override.h
new file mode 100644
index 00000000..93fa7b57
--- /dev/null
+++ b/instrumentation/syscalls/headers/x86-64-syscalls_pointers_override.h
@@ -0,0 +1,176 @@
+/* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1) */
+
+#ifndef CREATE_SYSCALL_TABLE
+
+#define OVERRIDE_64_connect
+SC_LTTNG_TRACEPOINT_EVENT_CODE(connect,
+	TP_PROTO(sc_exit(long ret,) int fd, struct sockaddr __user * uservaddr, int addrlen),
+	TP_ARGS(sc_exit(ret,) fd, uservaddr, addrlen),
+	TP_locvar(
+		__typeof__(uservaddr->sa_family) sa_family;
+		uint16_t dport;
+		uint32_t v4addr;
+		uint16_t v6addr[8];
+		unsigned int v4addr_len, v6addr_len;
+	),
+	TP_code_pre(
+		sc_in(
+			memset(tp_locvar, 0, sizeof(*tp_locvar));
+			if (addrlen < sizeof(tp_locvar->sa_family))
+				goto skip_code;
+			(void) lib_ring_buffer_copy_from_user_check_nofault(&tp_locvar->sa_family,
+					&uservaddr->sa_family, sizeof(tp_locvar->sa_family));
+			switch (tp_locvar->sa_family) {
+			case AF_INET:
+				if (addrlen < sizeof(struct sockaddr_in))
+					goto skip_code;
+				(void) lib_ring_buffer_copy_from_user_check_nofault(&tp_locvar->dport,
+						&((struct sockaddr_in __user *) uservaddr)->sin_port,
+						sizeof(tp_locvar->dport));
+				(void) lib_ring_buffer_copy_from_user_check_nofault(&tp_locvar->v4addr,
+						&((struct sockaddr_in __user *) uservaddr)->sin_addr.s_addr,
+						sizeof(tp_locvar->v4addr));
+				tp_locvar->v4addr_len = 4;
+				break;
+			case AF_INET6:
+				if (addrlen < sizeof(struct sockaddr_in6))
+					goto skip_code;
+				(void) lib_ring_buffer_copy_from_user_check_nofault(&tp_locvar->dport,
+						&((struct sockaddr_in6 __user *) uservaddr)->sin6_port,
+						sizeof(tp_locvar->dport));
+				if (lib_ring_buffer_copy_from_user_check_nofault(tp_locvar->v6addr,
+						&((struct sockaddr_in6 __user *) uservaddr)->sin6_addr.in6_u.u6_addr8,
+						sizeof(tp_locvar->v6addr)))
+					memset(tp_locvar->v6addr, 0, sizeof(tp_locvar->v6addr));
+				tp_locvar->v6addr_len = 8;
+				break;
+			}
+		skip_code:
+		)
+	),
+	TP_FIELDS(
+		sc_exit(ctf_integer(long, ret, ret))
+		sc_in(ctf_integer(int, fd, fd))
+		sc_in(ctf_integer_hex(struct sockaddr *, uservaddr, uservaddr))
+		sc_in(ctf_integer_hex(int, addrlen, addrlen))
+		sc_in(ctf_integer(unsigned short, family, tp_locvar->sa_family))
+		sc_in(ctf_integer_network(uint16_t, dport, tp_locvar->dport))
+		sc_in(ctf_sequence_network(uint8_t, v4addr, &tp_locvar->v4addr, unsigned int, tp_locvar->v4addr_len))
+		sc_in(ctf_sequence_network(uint16_t, v6addr, &tp_locvar->v6addr, unsigned int, tp_locvar->v6addr_len))
+	),
+	TP_code_post()
+)
+
+#define LTTNG_SYSCALL_ACCEPT_locvar			\
+	__typeof__(upeer_sockaddr->sa_family) sa_family;\
+	uint16_t sport;					\
+	uint32_t v4addr;				\
+	uint16_t v6addr[8];				\
+	int v4addr_len, v6addr_len;			\
+	int uaddr_len;
+
+#define LTTNG_SYSCALL_ACCEPT_code_pre											\
+	sc_inout(													\
+		memset(tp_locvar, 0, sizeof(*tp_locvar));								\
+		(void) lib_ring_buffer_copy_from_user_check_nofault(&tp_locvar->uaddr_len,				\
+				upeer_addrlen, sizeof(tp_locvar->uaddr_len));						\
+	)														\
+	sc_out(														\
+		if (tp_locvar->uaddr_len < sizeof(tp_locvar->sa_family))						\
+			goto skip_code;											\
+		(void) lib_ring_buffer_copy_from_user_check_nofault(&tp_locvar->sa_family,				\
+				&upeer_sockaddr->sa_family, sizeof(tp_locvar->sa_family));				\
+		switch (tp_locvar->sa_family) {										\
+		case AF_INET:												\
+			if (tp_locvar->uaddr_len < sizeof(struct sockaddr_in))						\
+				goto skip_code;										\
+			(void) lib_ring_buffer_copy_from_user_check_nofault(&tp_locvar->sport,				\
+					&((struct sockaddr_in __user *) upeer_sockaddr)->sin_port,			\
+					sizeof(tp_locvar->sport));							\
+			(void) lib_ring_buffer_copy_from_user_check_nofault(&tp_locvar->v4addr,				\
+					&((struct sockaddr_in __user *) upeer_sockaddr)->sin_addr.s_addr,		\
+					sizeof(tp_locvar->v4addr));							\
+			tp_locvar->v4addr_len = 4;									\
+			break;												\
+		case AF_INET6:												\
+			if (tp_locvar->uaddr_len < sizeof(struct sockaddr_in6))						\
+				goto skip_code;										\
+			(void) lib_ring_buffer_copy_from_user_check_nofault(&tp_locvar->sport,				\
+					&((struct sockaddr_in6 __user *) upeer_sockaddr)->sin6_port,			\
+					sizeof(tp_locvar->sport));							\
+			if (lib_ring_buffer_copy_from_user_check_nofault(tp_locvar->v6addr,				\
+					&((struct sockaddr_in6 __user *) upeer_sockaddr)->sin6_addr.in6_u.u6_addr8,	\
+					sizeof(tp_locvar->v6addr)))							\
+				memset(tp_locvar->v6addr, 0, sizeof(tp_locvar->v6addr));				\
+			tp_locvar->v6addr_len = 8;									\
+			break;												\
+		}													\
+	skip_code:													\
+	)
+
+#define OVERRIDE_64_accept
+SC_LTTNG_TRACEPOINT_EVENT_CODE(accept,
+	TP_PROTO(sc_exit(long ret,) int fd, struct sockaddr __user * upeer_sockaddr, int __user * upeer_addrlen),
+	TP_ARGS(sc_exit(ret,) fd, upeer_sockaddr, upeer_addrlen),
+	TP_locvar(
+		LTTNG_SYSCALL_ACCEPT_locvar
+	),
+	TP_code_pre(
+		LTTNG_SYSCALL_ACCEPT_code_pre
+	),
+	TP_FIELDS(
+		sc_exit(ctf_integer(long, ret, ret))
+		sc_in(ctf_integer(int, fd, fd))
+		sc_in(ctf_integer_hex(struct sockaddr *, upeer_sockaddr, upeer_sockaddr))
+		sc_inout(ctf_integer(int, upeer_addrlen, tp_locvar->uaddr_len))
+		sc_out(ctf_integer(unsigned short, family, tp_locvar->sa_family))
+		sc_out(ctf_integer_network(uint16_t, sport, tp_locvar->sport))
+		sc_out(ctf_sequence_network(uint8_t, v4addr, &tp_locvar->v4addr, unsigned int, tp_locvar->v4addr_len))
+		sc_out(ctf_sequence_network(uint16_t, v6addr, &tp_locvar->v6addr, unsigned int, tp_locvar->v6addr_len))
+	),
+	TP_code_post()
+)
+
+#define OVERRIDE_64_accept4
+SC_LTTNG_TRACEPOINT_EVENT_CODE(accept4,
+	TP_PROTO(sc_exit(long ret,) int fd, struct sockaddr __user * upeer_sockaddr, int __user * upeer_addrlen, int flags),
+	TP_ARGS(sc_exit(ret,) fd, upeer_sockaddr, upeer_addrlen, flags),
+	TP_locvar(
+		LTTNG_SYSCALL_ACCEPT_locvar
+	),
+	TP_code_pre(
+		LTTNG_SYSCALL_ACCEPT_code_pre
+	),
+	TP_FIELDS(
+		sc_exit(ctf_integer(long, ret, ret))
+		sc_in(ctf_integer(int, fd, fd))
+		sc_in(ctf_integer_hex(struct sockaddr *, upeer_sockaddr, upeer_sockaddr))
+		sc_inout(ctf_integer(int, upeer_addrlen, tp_locvar->uaddr_len))
+		sc_in(ctf_integer_hex(int, flags, flags))
+		sc_out(ctf_integer(unsigned short, family, tp_locvar->sa_family))
+		sc_out(ctf_integer_network(uint16_t, sport, tp_locvar->sport))
+		sc_out(ctf_sequence_network(uint8_t, v4addr, &tp_locvar->v4addr, unsigned int, tp_locvar->v4addr_len))
+		sc_out(ctf_sequence_network(uint16_t, v6addr, &tp_locvar->v6addr, unsigned int, tp_locvar->v6addr_len))
+	),
+	TP_code_post()
+)
+
+#define OVERRIDE_64_pipe
+SC_LTTNG_TRACEPOINT_EVENT(pipe,
+	TP_PROTO(sc_exit(long ret,) int * fildes),
+	TP_ARGS(sc_exit(ret,) fildes),
+	TP_FIELDS(sc_exit(ctf_integer(long, ret, ret))
+		sc_out(ctf_user_array(int, fildes, fildes, 2))
+	)
+)
+
+#else	/* CREATE_SYSCALL_TABLE */
+
+#define OVERRIDE_TABLE_64_clone
+TRACE_SYSCALL_TABLE(clone, clone, 56, 5)
+#define OVERRIDE_TABLE_64_execve
+TRACE_SYSCALL_TABLE(execve, execve, 59, 3)
+#define OVERRIDE_TABLE_64_getcpu
+TRACE_SYSCALL_TABLE(getcpu, getcpu, 309, 3)
+
+#endif /* CREATE_SYSCALL_TABLE */