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-rw-r--r--qemu/target-i386/bpt_helper.c327
1 files changed, 0 insertions, 327 deletions
diff --git a/qemu/target-i386/bpt_helper.c b/qemu/target-i386/bpt_helper.c
deleted file mode 100644
index f47df1998..000000000
--- a/qemu/target-i386/bpt_helper.c
+++ /dev/null
@@ -1,327 +0,0 @@
-/*
- * i386 breakpoint helpers
- *
- * Copyright (c) 2003 Fabrice Bellard
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, see <http://www.gnu.org/licenses/>.
- */
-
-#include "qemu/osdep.h"
-#include "cpu.h"
-#include "exec/helper-proto.h"
-
-
-#ifndef CONFIG_USER_ONLY
-static inline bool hw_local_breakpoint_enabled(unsigned long dr7, int index)
-{
- return (dr7 >> (index * 2)) & 1;
-}
-
-static inline bool hw_global_breakpoint_enabled(unsigned long dr7, int index)
-{
- return (dr7 >> (index * 2)) & 2;
-
-}
-static inline bool hw_breakpoint_enabled(unsigned long dr7, int index)
-{
- return hw_global_breakpoint_enabled(dr7, index) ||
- hw_local_breakpoint_enabled(dr7, index);
-}
-
-static inline int hw_breakpoint_type(unsigned long dr7, int index)
-{
- return (dr7 >> (DR7_TYPE_SHIFT + (index * 4))) & 3;
-}
-
-static inline int hw_breakpoint_len(unsigned long dr7, int index)
-{
- int len = ((dr7 >> (DR7_LEN_SHIFT + (index * 4))) & 3);
- return (len == 2) ? 8 : len + 1;
-}
-
-static int hw_breakpoint_insert(CPUX86State *env, int index)
-{
- CPUState *cs = CPU(x86_env_get_cpu(env));
- target_ulong dr7 = env->dr[7];
- target_ulong drN = env->dr[index];
- int err = 0;
-
- switch (hw_breakpoint_type(dr7, index)) {
- case DR7_TYPE_BP_INST:
- if (hw_breakpoint_enabled(dr7, index)) {
- err = cpu_breakpoint_insert(cs, drN, BP_CPU,
- &env->cpu_breakpoint[index]);
- }
- break;
-
- case DR7_TYPE_IO_RW:
- /* Notice when we should enable calls to bpt_io. */
- return hw_breakpoint_enabled(env->dr[7], index)
- ? HF_IOBPT_MASK : 0;
-
- case DR7_TYPE_DATA_WR:
- if (hw_breakpoint_enabled(dr7, index)) {
- err = cpu_watchpoint_insert(cs, drN,
- hw_breakpoint_len(dr7, index),
- BP_CPU | BP_MEM_WRITE,
- &env->cpu_watchpoint[index]);
- }
- break;
-
- case DR7_TYPE_DATA_RW:
- if (hw_breakpoint_enabled(dr7, index)) {
- err = cpu_watchpoint_insert(cs, drN,
- hw_breakpoint_len(dr7, index),
- BP_CPU | BP_MEM_ACCESS,
- &env->cpu_watchpoint[index]);
- }
- break;
- }
- if (err) {
- env->cpu_breakpoint[index] = NULL;
- }
- return 0;
-}
-
-static void hw_breakpoint_remove(CPUX86State *env, int index)
-{
- CPUState *cs = CPU(x86_env_get_cpu(env));
-
- switch (hw_breakpoint_type(env->dr[7], index)) {
- case DR7_TYPE_BP_INST:
- if (env->cpu_breakpoint[index]) {
- cpu_breakpoint_remove_by_ref(cs, env->cpu_breakpoint[index]);
- env->cpu_breakpoint[index] = NULL;
- }
- break;
-
- case DR7_TYPE_DATA_WR:
- case DR7_TYPE_DATA_RW:
- if (env->cpu_breakpoint[index]) {
- cpu_watchpoint_remove_by_ref(cs, env->cpu_watchpoint[index]);
- env->cpu_breakpoint[index] = NULL;
- }
- break;
-
- case DR7_TYPE_IO_RW:
- /* HF_IOBPT_MASK cleared elsewhere. */
- break;
- }
-}
-
-void cpu_x86_update_dr7(CPUX86State *env, uint32_t new_dr7)
-{
- target_ulong old_dr7 = env->dr[7];
- int iobpt = 0;
- int i;
-
- new_dr7 |= DR7_FIXED_1;
-
- /* If nothing is changing except the global/local enable bits,
- then we can make the change more efficient. */
- if (((old_dr7 ^ new_dr7) & ~0xff) == 0) {
- /* Fold the global and local enable bits together into the
- global fields, then xor to show which registers have
- changed collective enable state. */
- int mod = ((old_dr7 | old_dr7 * 2) ^ (new_dr7 | new_dr7 * 2)) & 0xff;
-
- for (i = 0; i < DR7_MAX_BP; i++) {
- if ((mod & (2 << i * 2)) && !hw_breakpoint_enabled(new_dr7, i)) {
- hw_breakpoint_remove(env, i);
- }
- }
- env->dr[7] = new_dr7;
- for (i = 0; i < DR7_MAX_BP; i++) {
- if (mod & (2 << i * 2) && hw_breakpoint_enabled(new_dr7, i)) {
- iobpt |= hw_breakpoint_insert(env, i);
- } else if (hw_breakpoint_type(new_dr7, i) == DR7_TYPE_IO_RW
- && hw_breakpoint_enabled(new_dr7, i)) {
- iobpt |= HF_IOBPT_MASK;
- }
- }
- } else {
- for (i = 0; i < DR7_MAX_BP; i++) {
- hw_breakpoint_remove(env, i);
- }
- env->dr[7] = new_dr7;
- for (i = 0; i < DR7_MAX_BP; i++) {
- iobpt |= hw_breakpoint_insert(env, i);
- }
- }
-
- env->hflags = (env->hflags & ~HF_IOBPT_MASK) | iobpt;
-}
-
-static bool check_hw_breakpoints(CPUX86State *env, bool force_dr6_update)
-{
- target_ulong dr6;
- int reg;
- bool hit_enabled = false;
-
- dr6 = env->dr[6] & ~0xf;
- for (reg = 0; reg < DR7_MAX_BP; reg++) {
- bool bp_match = false;
- bool wp_match = false;
-
- switch (hw_breakpoint_type(env->dr[7], reg)) {
- case DR7_TYPE_BP_INST:
- if (env->dr[reg] == env->eip) {
- bp_match = true;
- }
- break;
- case DR7_TYPE_DATA_WR:
- case DR7_TYPE_DATA_RW:
- if (env->cpu_watchpoint[reg] &&
- env->cpu_watchpoint[reg]->flags & BP_WATCHPOINT_HIT) {
- wp_match = true;
- }
- break;
- case DR7_TYPE_IO_RW:
- break;
- }
- if (bp_match || wp_match) {
- dr6 |= 1 << reg;
- if (hw_breakpoint_enabled(env->dr[7], reg)) {
- hit_enabled = true;
- }
- }
- }
-
- if (hit_enabled || force_dr6_update) {
- env->dr[6] = dr6;
- }
-
- return hit_enabled;
-}
-
-void breakpoint_handler(CPUState *cs)
-{
- X86CPU *cpu = X86_CPU(cs);
- CPUX86State *env = &cpu->env;
- CPUBreakpoint *bp;
-
- if (cs->watchpoint_hit) {
- if (cs->watchpoint_hit->flags & BP_CPU) {
- cs->watchpoint_hit = NULL;
- if (check_hw_breakpoints(env, false)) {
- raise_exception(env, EXCP01_DB);
- } else {
- cpu_resume_from_signal(cs, NULL);
- }
- }
- } else {
- QTAILQ_FOREACH(bp, &cs->breakpoints, entry) {
- if (bp->pc == env->eip) {
- if (bp->flags & BP_CPU) {
- check_hw_breakpoints(env, true);
- raise_exception(env, EXCP01_DB);
- }
- break;
- }
- }
- }
-}
-#endif
-
-void helper_single_step(CPUX86State *env)
-{
-#ifndef CONFIG_USER_ONLY
- check_hw_breakpoints(env, true);
- env->dr[6] |= DR6_BS;
-#endif
- raise_exception(env, EXCP01_DB);
-}
-
-void helper_set_dr(CPUX86State *env, int reg, target_ulong t0)
-{
-#ifndef CONFIG_USER_ONLY
- switch (reg) {
- case 0: case 1: case 2: case 3:
- if (hw_breakpoint_enabled(env->dr[7], reg)
- && hw_breakpoint_type(env->dr[7], reg) != DR7_TYPE_IO_RW) {
- hw_breakpoint_remove(env, reg);
- env->dr[reg] = t0;
- hw_breakpoint_insert(env, reg);
- } else {
- env->dr[reg] = t0;
- }
- return;
- case 4:
- if (env->cr[4] & CR4_DE_MASK) {
- break;
- }
- /* fallthru */
- case 6:
- env->dr[6] = t0 | DR6_FIXED_1;
- return;
- case 5:
- if (env->cr[4] & CR4_DE_MASK) {
- break;
- }
- /* fallthru */
- case 7:
- cpu_x86_update_dr7(env, t0);
- return;
- }
- raise_exception_err_ra(env, EXCP06_ILLOP, 0, GETPC());
-#endif
-}
-
-target_ulong helper_get_dr(CPUX86State *env, int reg)
-{
- switch (reg) {
- case 0: case 1: case 2: case 3: case 6: case 7:
- return env->dr[reg];
- case 4:
- if (env->cr[4] & CR4_DE_MASK) {
- break;
- } else {
- return env->dr[6];
- }
- case 5:
- if (env->cr[4] & CR4_DE_MASK) {
- break;
- } else {
- return env->dr[7];
- }
- }
- raise_exception_err_ra(env, EXCP06_ILLOP, 0, GETPC());
-}
-
-/* Check if Port I/O is trapped by a breakpoint. */
-void helper_bpt_io(CPUX86State *env, uint32_t port,
- uint32_t size, target_ulong next_eip)
-{
-#ifndef CONFIG_USER_ONLY
- target_ulong dr7 = env->dr[7];
- int i, hit = 0;
-
- for (i = 0; i < DR7_MAX_BP; ++i) {
- if (hw_breakpoint_type(dr7, i) == DR7_TYPE_IO_RW
- && hw_breakpoint_enabled(dr7, i)) {
- int bpt_len = hw_breakpoint_len(dr7, i);
- if (port + size - 1 >= env->dr[i]
- && port <= env->dr[i] + bpt_len - 1) {
- hit |= 1 << i;
- }
- }
- }
-
- if (hit) {
- env->dr[6] = (env->dr[6] & ~0xf) | hit;
- env->eip = next_eip;
- raise_exception(env, EXCP01_DB);
- }
-#endif
-}