unicorn/qemu/tcg-runtime.c

/*
 * Tiny Code Generator for QEMU
 *
 * Copyright (c) 2008 Fabrice Bellard
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
#include "qemu/osdep.h"
#include "unicorn/platform.h"
#include "qemu/host-utils.h"
#include "cpu.h"
#include "exec/helper-proto.h"
#include "exec/cpu_ldst.h"
#include "exec/exec-all.h"
#include "exec/tb-hash.h"

/* 32-bit helpers */

int32_t HELPER(div_i32)(int32_t arg1, int32_t arg2)
{
    return arg1 / arg2;
}

int32_t HELPER(rem_i32)(int32_t arg1, int32_t arg2)
{
    return arg1 % arg2;
}

uint32_t HELPER(divu_i32)(uint32_t arg1, uint32_t arg2)
{
    return arg1 / arg2;
}

uint32_t HELPER(remu_i32)(uint32_t arg1, uint32_t arg2)
{
    return arg1 % arg2;
}

/* 64-bit helpers */

uint64_t HELPER(shl_i64)(uint64_t arg1, uint64_t arg2)
{
    return arg1 << arg2;
}

uint64_t HELPER(shr_i64)(uint64_t arg1, uint64_t arg2)
{
    return arg1 >> arg2;
}

int64_t HELPER(sar_i64)(int64_t arg1, int64_t arg2)
{
    return arg1 >> arg2;
}

int64_t HELPER(div_i64)(int64_t arg1, int64_t arg2)
{
    return arg1 / arg2;
}

int64_t HELPER(rem_i64)(int64_t arg1, int64_t arg2)
{
    return arg1 % arg2;
}

uint64_t HELPER(divu_i64)(uint64_t arg1, uint64_t arg2)
{
    return arg1 / arg2;
}

uint64_t HELPER(remu_i64)(uint64_t arg1, uint64_t arg2)
{
    return arg1 % arg2;
}

uint64_t HELPER(muluh_i64)(uint64_t arg1, uint64_t arg2)
{
    uint64_t l, h;
    mulu64(&l, &h, arg1, arg2);
    return h;
}

int64_t HELPER(mulsh_i64)(int64_t arg1, int64_t arg2)
{
    uint64_t l, h;
    muls64(&l, &h, arg1, arg2);
    return h;
}

uint32_t HELPER(clz_i32)(uint32_t arg, uint32_t zero_val)
{
    return arg ? clz32(arg) : zero_val;
}

uint32_t HELPER(ctz_i32)(uint32_t arg, uint32_t zero_val)
{
    return arg ? ctz32(arg) : zero_val;
}

uint64_t HELPER(clz_i64)(uint64_t arg, uint64_t zero_val)
{
    return arg ? clz64(arg) : zero_val;
}

uint64_t HELPER(ctz_i64)(uint64_t arg, uint64_t zero_val)
{
    return arg ? ctz64(arg) : zero_val;
}

uint32_t HELPER(clrsb_i32)(uint32_t arg)
{
    return clrsb32(arg);
}

uint64_t HELPER(clrsb_i64)(uint64_t arg)
{
    return clrsb64(arg);
}

uint32_t HELPER(ctpop_i32)(uint32_t arg)
{
    return ctpop32(arg);
}

uint64_t HELPER(ctpop_i64)(uint64_t arg)
{
    return ctpop64(arg);
}

void *HELPER(lookup_tb_ptr)(CPUArchState *env, target_ulong addr)
{
    TCGContext *tcg_ctx = env->uc->tcg_ctx;
    CPUState *cpu = ENV_GET_CPU(env);
    TranslationBlock *tb;
    target_ulong cs_base, pc;
    uint32_t flags, addr_hash;

    addr_hash = tb_jmp_cache_hash_func(addr);
    // Unicorn: atomic_read used instead of atomic_rcu_read
    tb = atomic_read(&cpu->tb_jmp_cache[addr_hash]);
    cpu_get_tb_cpu_state(env, &pc, &cs_base, &flags);

    if (unlikely(!(tb
                   && tb->pc == addr
                   && tb->cs_base == cs_base
                   && tb->flags == flags))) {
        tb = tb_htable_lookup(cpu, addr, cs_base, flags);
        if (!tb) {
            return tcg_ctx->code_gen_epilogue;
        }
        atomic_set(&cpu->tb_jmp_cache[addr_hash], tb);
    }

    // Unicorn: commented out
    //qemu_log_mask_and_addr(CPU_LOG_EXEC, addr,
    //                       "Chain %p [%d: " TARGET_FMT_lx "] %s\n",
    //                       tb->tc_ptr, cpu->cpu_index, addr,
    //                       lookup_symbol(addr));
    return tb->tc_ptr;
}

void HELPER(exit_atomic)(CPUArchState *env)
{
    cpu_loop_exit_atomic(ENV_GET_CPU(env), GETPC());
}

#ifndef CONFIG_SOFTMMU
/* The softmmu versions of these helpers are in cputlb.c.  */

/* Do not allow unaligned operations to proceed.  Return the host address.  */
static void *atomic_mmu_lookup(CPUArchState *env, target_ulong addr,
                               int size, uintptr_t retaddr)
{
    /* Enforce qemu required alignment.  */
    if (unlikely(addr & (size - 1))) {
        cpu_loop_exit_atomic(ENV_GET_CPU(env), retaddr);
    }
    return g2h(addr);
}

/* Macro to call the above, with local variables from the use context.  */
#define ATOMIC_MMU_LOOKUP  atomic_mmu_lookup(env, addr, DATA_SIZE, GETPC())

#define ATOMIC_NAME(X)   HELPER(glue(glue(atomic_ ## X, SUFFIX), END))
#define EXTRA_ARGS

#define DATA_SIZE 1
#include "atomic_template.h"

#define DATA_SIZE 2
#include "atomic_template.h"

#define DATA_SIZE 4
#include "atomic_template.h"

#ifdef CONFIG_ATOMIC64
#define DATA_SIZE 8
#include "atomic_template.h"
#endif

/* The following is only callable from other helpers, and matches up
   with the softmmu version.  */

#ifdef CONFIG_ATOMIC128

#undef EXTRA_ARGS
#undef ATOMIC_NAME
#undef ATOMIC_MMU_LOOKUP

#define EXTRA_ARGS     , TCGMemOpIdx oi, uintptr_t retaddr
#define ATOMIC_NAME(X) \
    HELPER(glue(glue(glue(atomic_ ## X, SUFFIX), END), _mmu))
#define ATOMIC_MMU_LOOKUP  atomic_mmu_lookup(env, addr, DATA_SIZE, retaddr)

#define DATA_SIZE 16
#include "atomic_template.h"
#endif /* CONFIG_ATOMIC128 */

#endif /* !CONFIG_SOFTMMU */