[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[PATCH v2 12/14] gdbstub: Add syscall entry/return hooks
From: |
Alex Bennée |
Subject: |
[PATCH v2 12/14] gdbstub: Add syscall entry/return hooks |
Date: |
Wed, 7 Feb 2024 16:38:10 +0000 |
From: Ilya Leoshkevich <iii@linux.ibm.com>
The upcoming syscall catchpoint support needs to get control on syscall
entry and return. Provide the necessary hooks for that, which are
no-ops for now.
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-Id: <20240202152506.279476-4-iii@linux.ibm.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---
include/gdbstub/user.h | 13 +++++++++++++
include/user/syscall-trace.h | 7 +++++--
gdbstub/user.c | 8 ++++++++
3 files changed, 26 insertions(+), 2 deletions(-)
diff --git a/include/gdbstub/user.h b/include/gdbstub/user.h
index 1fc43e04af5..68b6534130c 100644
--- a/include/gdbstub/user.h
+++ b/include/gdbstub/user.h
@@ -51,5 +51,18 @@ void gdb_signalled(CPUArchState *as, int sig);
*/
void gdbserver_fork(CPUState *cs);
+/**
+ * gdb_syscall_entry() - inform gdb of syscall entry and yield control to it
+ * @cs: CPU
+ * @num: syscall number
+ */
+void gdb_syscall_entry(CPUState *cs, int num);
+
+/**
+ * gdb_syscall_entry() - inform gdb of syscall return and yield control to it
+ * @cs: CPU
+ * @num: syscall number
+ */
+void gdb_syscall_return(CPUState *cs, int num);
#endif /* GDBSTUB_USER_H */
diff --git a/include/user/syscall-trace.h b/include/user/syscall-trace.h
index 557f881a79b..b48b2b2d0ae 100644
--- a/include/user/syscall-trace.h
+++ b/include/user/syscall-trace.h
@@ -11,6 +11,7 @@
#define SYSCALL_TRACE_H
#include "exec/user/abitypes.h"
+#include "gdbstub/user.h"
#include "qemu/plugin.h"
#include "trace/trace-root.h"
@@ -20,7 +21,7 @@
* could potentially unify the -strace code here as well.
*/
-static inline void record_syscall_start(void *cpu, int num,
+static inline void record_syscall_start(CPUState *cpu, int num,
abi_long arg1, abi_long arg2,
abi_long arg3, abi_long arg4,
abi_long arg5, abi_long arg6,
@@ -29,11 +30,13 @@ static inline void record_syscall_start(void *cpu, int num,
qemu_plugin_vcpu_syscall(cpu, num,
arg1, arg2, arg3, arg4,
arg5, arg6, arg7, arg8);
+ gdb_syscall_entry(cpu, num);
}
-static inline void record_syscall_return(void *cpu, int num, abi_long ret)
+static inline void record_syscall_return(CPUState *cpu, int num, abi_long ret)
{
qemu_plugin_vcpu_syscall_ret(cpu, num, ret);
+ gdb_syscall_return(cpu, num);
}
diff --git a/gdbstub/user.c b/gdbstub/user.c
index 63edca131ab..2ba01c17faf 100644
--- a/gdbstub/user.c
+++ b/gdbstub/user.c
@@ -502,3 +502,11 @@ void gdb_syscall_handling(const char *syscall_packet)
gdb_put_packet(syscall_packet);
gdb_handlesig(gdbserver_state.c_cpu, 0);
}
+
+void gdb_syscall_entry(CPUState *cs, int num)
+{
+}
+
+void gdb_syscall_return(CPUState *cs, int num)
+{
+}
--
2.39.2
- [PATCH v2 05/14] tests/vm: Set UseDNS=no in the sshd configuration, (continued)
- [PATCH v2 05/14] tests/vm: Set UseDNS=no in the sshd configuration, Alex Bennée, 2024/02/07
- [PATCH v2 08/14] meson: Link with libinotify on FreeBSD, Alex Bennée, 2024/02/07
- [PATCH v2 07/14] test-util-filemonitor: Adapt to the FreeBSD inotify rename semantics, Alex Bennée, 2024/02/07
- [PATCH v2 09/14] kconfig: use "select" to enable semihosting, Alex Bennée, 2024/02/07
- [PATCH v2 06/14] tests/vm/freebsd: Reload the sshd configuration, Alex Bennée, 2024/02/07
- [PATCH v2 10/14] gdbstub: Expose TARGET_SIGTRAP in a target-agnostic way, Alex Bennée, 2024/02/07
- [PATCH v2 12/14] gdbstub: Add syscall entry/return hooks,
Alex Bennée <=
- [PATCH v2 11/14] gdbstub: Allow specifying a reason in stop packets, Alex Bennée, 2024/02/07
- [PATCH v2 13/14] gdbstub: Implement catching syscalls, Alex Bennée, 2024/02/07
- [PATCH v2 14/14] tests/tcg: Add the syscall catchpoint gdbstub test, Alex Bennée, 2024/02/07