09b7a409a7
Add a minimal dlcall plugin that lets the guest invoke host functions through magic system calls. The plugin registers a vCPU syscall filter callback that intercepts a reserved syscall number and dispatches a set of pass-through operations: querying host attributes, loading and freeing shared libraries, resolving symbols, retrieving the last library error, and invoking a host function through a common interface. The magic syscall number defaults to 4096 and can be overridden at load time with the "syscall_num=N" argument; values low enough to clash with a real syscall are rejected. Co-authored-by: Kailiang Xu <xukl2019@sjtu.edu.cn> Co-authored-by: Mingyuan Xia <xiamy@ultrarisc.com> Signed-off-by: Ziyang Zhang <functioner@sjtu.edu.cn> Reviewed-by: Pierrick Bouvier <pierrick.bouvier@oss.qualcomm.com> Link: https://lore.kernel.org/qemu-devel/20260711094523.622997-2-functioner@sjtu.edu.cn Signed-off-by: Pierrick Bouvier <pierrick.bouvier@oss.qualcomm.com>
45 lines
799 B
Meson
45 lines
799 B
Meson
contrib_plugins = [
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'bbv.c',
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'cache.c',
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'cflow.c',
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'drcov.c',
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'execlog.c',
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'hotblocks.c',
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'hotpages.c',
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'howvec.c',
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'hwprofile.c',
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'ips.c',
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'stoptrigger.c',
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'traps.c',
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'uftrace.c',
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]
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if host_os != 'windows'
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# lockstep uses socket.h
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contrib_plugins += 'lockstep.c'
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endif
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if host_os == 'linux'
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# dlcall passes guest calls through to host libraries; linux-user only
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contrib_plugins += 'dlcall.c'
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endif
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if 'cpp' in all_languages
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contrib_plugins += 'cpp.cpp'
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endif
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t = []
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if get_option('plugins')
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foreach i : contrib_plugins
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t += shared_module(fs.stem(i), files(i),
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dependencies: plugins_deps)
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endforeach
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endif
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if t.length() > 0
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alias_target('contrib-plugins', t)
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else
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run_target('contrib-plugins', command: [python, '-c', ''])
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endif
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plugin_modules += t
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