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Diffstat (limited to 'docs/devel')
| -rw-r--r-- | docs/devel/tcg-plugins.rst | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/docs/devel/tcg-plugins.rst b/docs/devel/tcg-plugins.rst index f7d7b9e..954623f 100644 --- a/docs/devel/tcg-plugins.rst +++ b/docs/devel/tcg-plugins.rst @@ -642,6 +642,28 @@ The plugin has a number of arguments, all of them are optional: configuration arguments implies ``l2=on``. (default: N = 2097152 (2MB), B = 64, A = 16) +- contrib/plugins/stoptrigger.c + +The stoptrigger plugin allows to setup triggers to stop emulation. +It can be used for research purposes to launch some code and precisely stop it +and understand where its execution flow went. + +Two types of triggers can be configured: a count of instructions to stop at, +or an address to stop at. Multiple triggers can be set at once. + +By default, QEMU will exit with return code 0. A custom return code can be +configured for each trigger using ``:CODE`` syntax. + +For example, to stop at the 20-th instruction with return code 41, at address +0xd4 with return code 0 or at address 0xd8 with return code 42:: + + $ qemu-system-aarch64 $(QEMU_ARGS) \ + -plugin ./contrib/plugins/libstoptrigger.so,icount=20:41,addr=0xd4,addr=0xd8:42 -d plugin + +The plugin will log the reason of exit, for example:: + + 0xd4 reached, exiting + Plugin API ========== |