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38b47b19ec
We first inject empty instrumentation from translator_loop. After translation, we go through the plugins to see what they want to register for, filling in the empty instrumentation. If if turns out that some instrumentation remains unused, we remove it. This approach supports the following features: - Inlining TCG code for simple operations. Note that we do not export TCG ops to plugins. Instead, we give them a C API to insert inlined ops. So far we only support adding an immediate to a u64, e.g. to count events. - "Direct" callbacks. These are callbacks that do not go via a helper. Instead, the helper is defined at run-time, so that the plugin code is directly called from TCG. This makes direct callbacks as efficient as possible; they are therefore used for very frequent events, e.g. memory callbacks. - Passing the host address to memory callbacks. Most of this is implemented in a later patch though. - Instrumentation of memory accesses performed from helpers. See the corresponding comment, as well as a later patch. Signed-off-by: Emilio G. Cota <cota@braap.org> [AJB: add alloc_tcg_plugin_context, use glib, rm hwaddr] Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
70 lines
2.4 KiB
C
70 lines
2.4 KiB
C
/* Helper file for declaring TCG helper functions.
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This one defines data structures private to tcg.c. */
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#ifndef HELPER_TCG_H
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#define HELPER_TCG_H
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#include "exec/helper-head.h"
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/* Need one more level of indirection before stringification
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to get all the macros expanded first. */
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#define str(s) #s
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#define DEF_HELPER_FLAGS_0(NAME, FLAGS, ret) \
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{ .func = HELPER(NAME), .name = str(NAME), \
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.flags = FLAGS | dh_callflag(ret), \
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.sizemask = dh_sizemask(ret, 0) },
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#define DEF_HELPER_FLAGS_1(NAME, FLAGS, ret, t1) \
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{ .func = HELPER(NAME), .name = str(NAME), \
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.flags = FLAGS | dh_callflag(ret), \
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.sizemask = dh_sizemask(ret, 0) | dh_sizemask(t1, 1) },
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#define DEF_HELPER_FLAGS_2(NAME, FLAGS, ret, t1, t2) \
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{ .func = HELPER(NAME), .name = str(NAME), \
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.flags = FLAGS | dh_callflag(ret), \
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.sizemask = dh_sizemask(ret, 0) | dh_sizemask(t1, 1) \
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| dh_sizemask(t2, 2) },
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#define DEF_HELPER_FLAGS_3(NAME, FLAGS, ret, t1, t2, t3) \
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{ .func = HELPER(NAME), .name = str(NAME), \
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.flags = FLAGS | dh_callflag(ret), \
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.sizemask = dh_sizemask(ret, 0) | dh_sizemask(t1, 1) \
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| dh_sizemask(t2, 2) | dh_sizemask(t3, 3) },
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#define DEF_HELPER_FLAGS_4(NAME, FLAGS, ret, t1, t2, t3, t4) \
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{ .func = HELPER(NAME), .name = str(NAME), \
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.flags = FLAGS | dh_callflag(ret), \
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.sizemask = dh_sizemask(ret, 0) | dh_sizemask(t1, 1) \
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| dh_sizemask(t2, 2) | dh_sizemask(t3, 3) | dh_sizemask(t4, 4) },
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#define DEF_HELPER_FLAGS_5(NAME, FLAGS, ret, t1, t2, t3, t4, t5) \
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{ .func = HELPER(NAME), .name = str(NAME), \
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.flags = FLAGS | dh_callflag(ret), \
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.sizemask = dh_sizemask(ret, 0) | dh_sizemask(t1, 1) \
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| dh_sizemask(t2, 2) | dh_sizemask(t3, 3) | dh_sizemask(t4, 4) \
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| dh_sizemask(t5, 5) },
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#define DEF_HELPER_FLAGS_6(NAME, FLAGS, ret, t1, t2, t3, t4, t5, t6) \
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{ .func = HELPER(NAME), .name = str(NAME), \
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.flags = FLAGS | dh_callflag(ret), \
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.sizemask = dh_sizemask(ret, 0) | dh_sizemask(t1, 1) \
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| dh_sizemask(t2, 2) | dh_sizemask(t3, 3) | dh_sizemask(t4, 4) \
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| dh_sizemask(t5, 5) | dh_sizemask(t6, 6) },
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#include "helper.h"
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#include "trace/generated-helpers.h"
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#include "tcg-runtime.h"
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#include "plugin-helpers.h"
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#undef str
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#undef DEF_HELPER_FLAGS_0
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#undef DEF_HELPER_FLAGS_1
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#undef DEF_HELPER_FLAGS_2
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#undef DEF_HELPER_FLAGS_3
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#undef DEF_HELPER_FLAGS_4
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#undef DEF_HELPER_FLAGS_5
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#undef DEF_HELPER_FLAGS_6
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#endif /* HELPER_TCG_H */
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