include/exec/plugin-gen.h

   1 /*
   2  * Copyright (C) 2017, Emilio G. Cota <cota@braap.org>
   3  *
   4  * License: GNU GPL, version 2 or later.
   5  *   See the COPYING file in the top-level directory.
   6  *
   7  * plugin-gen.h - TCG-dependent definitions for generating plugin code
   8  *
   9  * This header should be included only from plugin.c and C files that emit
  10  * TCG code.
  11  */
  12 #ifndef QEMU_PLUGIN_GEN_H
  13 #define QEMU_PLUGIN_GEN_H
  14
  15 #include "exec/cpu_ldst.h"
  16 #include "qemu/plugin.h"
  17 #include "tcg/tcg.h"
  18
  19 struct DisasContextBase;
  20
  21 #ifdef CONFIG_PLUGIN
  22
  23 bool plugin_gen_tb_start(CPUState *cpu, const struct DisasContextBase *db,
  24                          bool supress);
  25 void plugin_gen_tb_end(CPUState *cpu);
  26 void plugin_gen_insn_start(CPUState *cpu, const struct DisasContextBase *db);
  27 void plugin_gen_insn_end(void);
  28
  29 void plugin_gen_disable_mem_helpers(void);
  30 void plugin_gen_empty_mem_callback(TCGv addr, uint32_t info);
  31
  32 static inline void plugin_insn_append(abi_ptr pc, const void *from, size_t size)
  33 {
  34     struct qemu_plugin_insn *insn = tcg_ctx->plugin_insn;
  35     abi_ptr off;
  36
  37     if (insn == NULL) {
  38         return;
  39     }
  40     off = pc - insn->vaddr;
  41     if (off < insn->data->len) {
  42         g_byte_array_set_size(insn->data, off);
  43     } else if (off > insn->data->len) {
  44         /* we have an unexpected gap */
  45         g_assert_not_reached();
  46     }
  47
  48     insn->data = g_byte_array_append(insn->data, from, size);
  49 }
  50
  51 #else /* !CONFIG_PLUGIN */
  52
  53 static inline bool
  54 plugin_gen_tb_start(CPUState *cpu, const struct DisasContextBase *db, bool sup)
  55 {
  56     return false;
  57 }
  58
  59 static inline
  60 void plugin_gen_insn_start(CPUState *cpu, const struct DisasContextBase *db)
  61 { }
  62
  63 static inline void plugin_gen_insn_end(void)
  64 { }
  65
  66 static inline void plugin_gen_tb_end(CPUState *cpu)
  67 { }
  68
  69 static inline void plugin_gen_disable_mem_helpers(void)
  70 { }
  71
  72 static inline void plugin_gen_empty_mem_callback(TCGv addr, uint32_t info)
  73 { }
  74
  75 static inline void plugin_insn_append(abi_ptr pc, const void *from, size_t size)
  76 { }
  77
  78 #endif /* CONFIG_PLUGIN */
  79
  80 #endif /* QEMU_PLUGIN_GEN_H */
  81