b542683d77
While at it, use int for both num_insns and max_insns to make sure we have same-type comparisons. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Michael Clark <mjc@sifive.com> Signed-off-by: Emilio G. Cota <cota@braap.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
145 lines
4.5 KiB
C
145 lines
4.5 KiB
C
/*
|
|
* Generic intermediate code generation.
|
|
*
|
|
* Copyright (C) 2016-2017 Lluís Vilanova <vilanova@ac.upc.edu>
|
|
*
|
|
* This work is licensed under the terms of the GNU GPL, version 2 or later.
|
|
* See the COPYING file in the top-level directory.
|
|
*/
|
|
|
|
#ifndef EXEC__TRANSLATOR_H
|
|
#define EXEC__TRANSLATOR_H
|
|
|
|
/*
|
|
* Include this header from a target-specific file, and add a
|
|
*
|
|
* DisasContextBase base;
|
|
*
|
|
* member in your target-specific DisasContext.
|
|
*/
|
|
|
|
|
|
#include "exec/exec-all.h"
|
|
#include "tcg/tcg.h"
|
|
|
|
|
|
/**
|
|
* DisasJumpType:
|
|
* @DISAS_NEXT: Next instruction in program order.
|
|
* @DISAS_TOO_MANY: Too many instructions translated.
|
|
* @DISAS_NORETURN: Following code is dead.
|
|
* @DISAS_TARGET_*: Start of target-specific conditions.
|
|
*
|
|
* What instruction to disassemble next.
|
|
*/
|
|
typedef enum DisasJumpType {
|
|
DISAS_NEXT,
|
|
DISAS_TOO_MANY,
|
|
DISAS_NORETURN,
|
|
DISAS_TARGET_0,
|
|
DISAS_TARGET_1,
|
|
DISAS_TARGET_2,
|
|
DISAS_TARGET_3,
|
|
DISAS_TARGET_4,
|
|
DISAS_TARGET_5,
|
|
DISAS_TARGET_6,
|
|
DISAS_TARGET_7,
|
|
DISAS_TARGET_8,
|
|
DISAS_TARGET_9,
|
|
DISAS_TARGET_10,
|
|
DISAS_TARGET_11,
|
|
} DisasJumpType;
|
|
|
|
/**
|
|
* DisasContextBase:
|
|
* @tb: Translation block for this disassembly.
|
|
* @pc_first: Address of first guest instruction in this TB.
|
|
* @pc_next: Address of next guest instruction in this TB (current during
|
|
* disassembly).
|
|
* @is_jmp: What instruction to disassemble next.
|
|
* @num_insns: Number of translated instructions (including current).
|
|
* @max_insns: Maximum number of instructions to be translated in this TB.
|
|
* @singlestep_enabled: "Hardware" single stepping enabled.
|
|
*
|
|
* Architecture-agnostic disassembly context.
|
|
*/
|
|
typedef struct DisasContextBase {
|
|
TranslationBlock *tb;
|
|
target_ulong pc_first;
|
|
target_ulong pc_next;
|
|
DisasJumpType is_jmp;
|
|
int num_insns;
|
|
int max_insns;
|
|
bool singlestep_enabled;
|
|
} DisasContextBase;
|
|
|
|
/**
|
|
* TranslatorOps:
|
|
* @init_disas_context:
|
|
* Initialize the target-specific portions of DisasContext struct.
|
|
* The generic DisasContextBase has already been initialized.
|
|
*
|
|
* @tb_start:
|
|
* Emit any code required before the start of the main loop,
|
|
* after the generic gen_tb_start().
|
|
*
|
|
* @insn_start:
|
|
* Emit the tcg_gen_insn_start opcode.
|
|
*
|
|
* @breakpoint_check:
|
|
* When called, the breakpoint has already been checked to match the PC,
|
|
* but the target may decide the breakpoint missed the address
|
|
* (e.g., due to conditions encoded in their flags). Return true to
|
|
* indicate that the breakpoint did hit, in which case no more breakpoints
|
|
* are checked. If the breakpoint did hit, emit any code required to
|
|
* signal the exception, and set db->is_jmp as necessary to terminate
|
|
* the main loop.
|
|
*
|
|
* @translate_insn:
|
|
* Disassemble one instruction and set db->pc_next for the start
|
|
* of the following instruction. Set db->is_jmp as necessary to
|
|
* terminate the main loop.
|
|
*
|
|
* @tb_stop:
|
|
* Emit any opcodes required to exit the TB, based on db->is_jmp.
|
|
*
|
|
* @disas_log:
|
|
* Print instruction disassembly to log.
|
|
*/
|
|
typedef struct TranslatorOps {
|
|
void (*init_disas_context)(DisasContextBase *db, CPUState *cpu);
|
|
void (*tb_start)(DisasContextBase *db, CPUState *cpu);
|
|
void (*insn_start)(DisasContextBase *db, CPUState *cpu);
|
|
bool (*breakpoint_check)(DisasContextBase *db, CPUState *cpu,
|
|
const CPUBreakpoint *bp);
|
|
void (*translate_insn)(DisasContextBase *db, CPUState *cpu);
|
|
void (*tb_stop)(DisasContextBase *db, CPUState *cpu);
|
|
void (*disas_log)(const DisasContextBase *db, CPUState *cpu);
|
|
} TranslatorOps;
|
|
|
|
/**
|
|
* translator_loop:
|
|
* @ops: Target-specific operations.
|
|
* @db: Disassembly context.
|
|
* @cpu: Target vCPU.
|
|
* @tb: Translation block.
|
|
*
|
|
* Generic translator loop.
|
|
*
|
|
* Translation will stop in the following cases (in order):
|
|
* - When is_jmp set by #TranslatorOps::breakpoint_check.
|
|
* - set to DISAS_TOO_MANY exits after translating one more insn
|
|
* - set to any other value than DISAS_NEXT exits immediately.
|
|
* - When is_jmp set by #TranslatorOps::translate_insn.
|
|
* - set to any value other than DISAS_NEXT exits immediately.
|
|
* - When the TCG operation buffer is full.
|
|
* - When single-stepping is enabled (system-wide or on the current vCPU).
|
|
* - When too many instructions have been translated.
|
|
*/
|
|
void translator_loop(const TranslatorOps *ops, DisasContextBase *db,
|
|
CPUState *cpu, TranslationBlock *tb);
|
|
|
|
void translator_loop_temp_check(DisasContextBase *db);
|
|
|
|
#endif /* EXEC__TRANSLATOR_H */
|