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gdbstub: Add syscall entry/return hooks
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> Message-Id: <20240207163812.3231697-13-alex.bennee@linaro.org>
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@ -502,3 +502,11 @@ void gdb_syscall_handling(const char *syscall_packet)
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gdb_put_packet(syscall_packet);
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gdb_put_packet(syscall_packet);
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gdb_handlesig(gdbserver_state.c_cpu, 0);
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gdb_handlesig(gdbserver_state.c_cpu, 0);
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}
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}
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void gdb_syscall_entry(CPUState *cs, int num)
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{
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}
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void gdb_syscall_return(CPUState *cs, int num)
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{
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}
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@ -51,5 +51,18 @@ void gdb_signalled(CPUArchState *as, int sig);
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*/
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*/
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void gdbserver_fork(CPUState *cs);
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void gdbserver_fork(CPUState *cs);
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/**
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* gdb_syscall_entry() - inform gdb of syscall entry and yield control to it
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* @cs: CPU
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* @num: syscall number
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*/
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void gdb_syscall_entry(CPUState *cs, int num);
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/**
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* gdb_syscall_entry() - inform gdb of syscall return and yield control to it
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* @cs: CPU
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* @num: syscall number
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*/
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void gdb_syscall_return(CPUState *cs, int num);
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#endif /* GDBSTUB_USER_H */
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#endif /* GDBSTUB_USER_H */
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@ -11,6 +11,7 @@
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#define SYSCALL_TRACE_H
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#define SYSCALL_TRACE_H
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#include "exec/user/abitypes.h"
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#include "exec/user/abitypes.h"
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#include "gdbstub/user.h"
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#include "qemu/plugin.h"
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#include "qemu/plugin.h"
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#include "trace/trace-root.h"
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#include "trace/trace-root.h"
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@ -20,7 +21,7 @@
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* could potentially unify the -strace code here as well.
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* could potentially unify the -strace code here as well.
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*/
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*/
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static inline void record_syscall_start(void *cpu, int num,
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static inline void record_syscall_start(CPUState *cpu, int num,
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abi_long arg1, abi_long arg2,
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abi_long arg1, abi_long arg2,
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abi_long arg3, abi_long arg4,
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abi_long arg3, abi_long arg4,
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abi_long arg5, abi_long arg6,
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abi_long arg5, abi_long arg6,
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@ -29,11 +30,13 @@ static inline void record_syscall_start(void *cpu, int num,
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qemu_plugin_vcpu_syscall(cpu, num,
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qemu_plugin_vcpu_syscall(cpu, num,
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arg1, arg2, arg3, arg4,
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arg1, arg2, arg3, arg4,
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arg5, arg6, arg7, arg8);
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arg5, arg6, arg7, arg8);
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gdb_syscall_entry(cpu, num);
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}
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}
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static inline void record_syscall_return(void *cpu, int num, abi_long ret)
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static inline void record_syscall_return(CPUState *cpu, int num, abi_long ret)
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{
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{
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qemu_plugin_vcpu_syscall_ret(cpu, num, ret);
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qemu_plugin_vcpu_syscall_ret(cpu, num, ret);
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gdb_syscall_return(cpu, num);
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}
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}
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