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gdbstub: Implement catching syscalls

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GDB supports stopping on syscall entry and exit using the "catch
syscall" command. It relies on 3 packets, which are currently not
supported by QEMU:

* qSupported:QCatchSyscalls+ [1]
* QCatchSyscalls: [2]
* T05syscall_entry: and T05syscall_return: [3]

Implement generation and handling of these packets.

[1] https://sourceware.org/gdb/current/onlinedocs/gdb.html/General-Query-Packets.html#qSupported
[2] https://sourceware.org/gdb/current/onlinedocs/gdb.html/General-Query-Packets.html#QCatchSyscalls
[3] https://sourceware.org/gdb/current/onlinedocs/gdb.html/Stop-Reply-Packets.html

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-Id: <20240202152506.279476-5-iii@linux.ibm.com>
[AJB: GString -> g_strdup_printf]
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20240207163812.3231697-14-alex.bennee@linaro.org>
This commit is contained in:
Ilya Leoshkevich
2024-02-07 16:38:11 +00:00
committed by Alex Bennée
parent 0a0d87c9b8
commit 046f143c51
3 changed files with 101 additions and 0 deletions
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gdbstub/internals.h
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@@ -195,6 +195,7 @@ void gdb_handle_v_file_close(GArray *params, void *user_ctx); /* user */
void gdb_handle_v_file_pread(GArray *params, void *user_ctx); /* user */
void gdb_handle_v_file_readlink(GArray *params, void *user_ctx); /* user */
void gdb_handle_query_xfer_exec_file(GArray *params, void *user_ctx); /* user */
void gdb_handle_set_catch_syscalls(GArray *params, void *user_ctx); /* user */
void gdb_handle_query_attached(GArray *params, void *user_ctx); /* both */