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[16/18] docs/user: Document the %d placeholder and suspend=n QEMU_GDB features

Message ID 20250203144048.2131117-17-alex.bennee@linaro.org
State New
Headers show
Series maintainer updates for feb25 (qtest, gdbstub, plugins) | expand

Commit Message

Alex Bennée Feb. 3, 2025, 2:40 p.m. UTC 
From: Ilya Leoshkevich <iii@linux.ibm.com>

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-Id: <20250117001542.8290-8-iii@linux.ibm.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---
 docs/user/main.rst | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)
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Patch

diff --git a/docs/user/main.rst b/docs/user/main.rst
index 80a77f0a0c..9a1c60448c 100644
--- a/docs/user/main.rst
+++ b/docs/user/main.rst
@@ -54,7 +54,7 @@  Command line options
 
 ::
 
-   qemu-i386 [-h] [-d] [-L path] [-s size] [-cpu model] [-g port] [-B offset] [-R size] program [arguments...]
+   qemu-i386 [-h] [-d] [-L path] [-s size] [-cpu model] [-g endpoint] [-B offset] [-R size] program [arguments...]
 
 ``-h``
    Print the help
@@ -91,8 +91,18 @@  Debug options:
    Activate logging of the specified items (use '-d help' for a list of
    log items)
 
-``-g port``
-   Wait gdb connection to port
+``-g endpoint``
+   Wait gdb connection to a port (e.g., ``1234``) or a unix socket (e.g.,
+   ``/tmp/qemu.sock``).
+
+   If a unix socket path contains single ``%d`` placeholder (e.g.,
+   ``/tmp/qemu-%d.sock``), it is replaced by the emulator PID, which is useful
+   when passing this option via the ``QEMU_GDB`` environment variable to a
+   multi-process application.
+
+   If the endpoint address is followed by ``,suspend=n`` (e.g.,
+   ``1234,suspend=n``), then the emulated program starts without waiting for a
+   connection, which can be established at any later point in time.
 
 ``-one-insn-per-tb``
    Run the emulation with one guest instruction per translation block.