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plugins: Create TCGHelperInfo for all out-of-line callbacks 

TCGHelperInfo includes the ABI for every function call.

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2024-03-14 09:09:11 -10:00
parent aff56de576
commit c7ba94836a
2 changed files with 46 additions and 6 deletions
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1
include/qemu/plugin.h
View File

@ -93,6 +93,7 @@ struct qemu_plugin_dyn_cb {
union {
struct {
union qemu_plugin_cb_sig f;
TCGHelperInfo *info;
} regular;
struct {
qemu_plugin_u64 entry;

51
plugins/core.c
View File

@ -338,12 +338,26 @@ void plugin_register_dyn_cb__udata(GArray **arr,
enum qemu_plugin_cb_flags flags,
void *udata)
{
struct qemu_plugin_dyn_cb *dyn_cb = plugin_get_dyn_cb(arr);
static TCGHelperInfo info[3] = {
[QEMU_PLUGIN_CB_NO_REGS].flags = TCG_CALL_NO_RWG | TCG_CALL_PLUGIN,
[QEMU_PLUGIN_CB_R_REGS].flags = TCG_CALL_NO_WG | TCG_CALL_PLUGIN,
[QEMU_PLUGIN_CB_RW_REGS].flags = TCG_CALL_PLUGIN,
/*
* Match qemu_plugin_vcpu_udata_cb_t:
* void (*)(uint32_t, void *)
*/
[0 ... 2].typemask = (dh_typemask(void, 0) |
dh_typemask(i32, 1) |
dh_typemask(ptr, 2))
};
struct qemu_plugin_dyn_cb *dyn_cb = plugin_get_dyn_cb(arr);
dyn_cb->userp = udata;
/* Note flags are discarded as unused. */
dyn_cb->regular.f.vcpu_udata = cb;
dyn_cb->type = PLUGIN_CB_REGULAR;
dyn_cb->regular.f.vcpu_udata = cb;
assert((unsigned)flags < ARRAY_SIZE(info));
dyn_cb->regular.info = &info[flags];
}
void plugin_register_vcpu_mem_cb(GArray **arr,
@ -352,14 +366,39 @@ void plugin_register_vcpu_mem_cb(GArray **arr,
enum qemu_plugin_mem_rw rw,
void *udata)
{
struct qemu_plugin_dyn_cb *dyn_cb;
/*
* Expect that the underlying type for enum qemu_plugin_meminfo_t
* is either int32_t or uint32_t, aka int or unsigned int.
*/
QEMU_BUILD_BUG_ON(
!__builtin_types_compatible_p(qemu_plugin_meminfo_t, uint32_t) &&
!__builtin_types_compatible_p(qemu_plugin_meminfo_t, int32_t));
dyn_cb = plugin_get_dyn_cb(arr);
static TCGHelperInfo info[3] = {
[QEMU_PLUGIN_CB_NO_REGS].flags = TCG_CALL_NO_RWG | TCG_CALL_PLUGIN,
[QEMU_PLUGIN_CB_R_REGS].flags = TCG_CALL_NO_WG | TCG_CALL_PLUGIN,
[QEMU_PLUGIN_CB_RW_REGS].flags = TCG_CALL_PLUGIN,
/*
* Match qemu_plugin_vcpu_mem_cb_t:
* void (*)(uint32_t, qemu_plugin_meminfo_t, uint64_t, void *)
*/
[0 ... 2].typemask =
(dh_typemask(void, 0) |
dh_typemask(i32, 1) |
(__builtin_types_compatible_p(qemu_plugin_meminfo_t, uint32_t)
? dh_typemask(i32, 2) : dh_typemask(s32, 2)) |
dh_typemask(i64, 3) |
dh_typemask(ptr, 4))
};
struct qemu_plugin_dyn_cb *dyn_cb = plugin_get_dyn_cb(arr);
dyn_cb->userp = udata;
/* Note flags are discarded as unused. */
dyn_cb->type = PLUGIN_CB_REGULAR;
dyn_cb->rw = rw;
dyn_cb->regular.f.vcpu_mem = cb;
assert((unsigned)flags < ARRAY_SIZE(info));
dyn_cb->regular.info = &info[flags];
}
/*