1c3d42c4c9
Keep system/watchpoint.c accelerator-agnostic by moving TCG specific code to accel/tcg/watchpoint.c. Update meson. Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20240111162032.43378-1-philmd@linaro.org>
101 lines
2.8 KiB
C
101 lines
2.8 KiB
C
/*
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* CPU watchpoints
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*
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* Copyright (c) 2003 Fabrice Bellard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "qemu/osdep.h"
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#include "qemu/error-report.h"
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#include "exec/exec-all.h"
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#include "hw/core/cpu.h"
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/* Add a watchpoint. */
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int cpu_watchpoint_insert(CPUState *cpu, vaddr addr, vaddr len,
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int flags, CPUWatchpoint **watchpoint)
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{
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CPUWatchpoint *wp;
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vaddr in_page;
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/* forbid ranges which are empty or run off the end of the address space */
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if (len == 0 || (addr + len - 1) < addr) {
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error_report("tried to set invalid watchpoint at %"
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VADDR_PRIx ", len=%" VADDR_PRIu, addr, len);
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return -EINVAL;
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}
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wp = g_malloc(sizeof(*wp));
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wp->vaddr = addr;
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wp->len = len;
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wp->flags = flags;
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/* keep all GDB-injected watchpoints in front */
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if (flags & BP_GDB) {
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QTAILQ_INSERT_HEAD(&cpu->watchpoints, wp, entry);
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} else {
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QTAILQ_INSERT_TAIL(&cpu->watchpoints, wp, entry);
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}
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in_page = -(addr | TARGET_PAGE_MASK);
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if (len <= in_page) {
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tlb_flush_page(cpu, addr);
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} else {
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tlb_flush(cpu);
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}
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if (watchpoint) {
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*watchpoint = wp;
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}
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return 0;
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}
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/* Remove a specific watchpoint. */
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int cpu_watchpoint_remove(CPUState *cpu, vaddr addr, vaddr len,
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int flags)
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{
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CPUWatchpoint *wp;
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QTAILQ_FOREACH(wp, &cpu->watchpoints, entry) {
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if (addr == wp->vaddr && len == wp->len
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&& flags == (wp->flags & ~BP_WATCHPOINT_HIT)) {
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cpu_watchpoint_remove_by_ref(cpu, wp);
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return 0;
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}
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}
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return -ENOENT;
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}
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/* Remove a specific watchpoint by reference. */
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void cpu_watchpoint_remove_by_ref(CPUState *cpu, CPUWatchpoint *watchpoint)
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{
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QTAILQ_REMOVE(&cpu->watchpoints, watchpoint, entry);
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tlb_flush_page(cpu, watchpoint->vaddr);
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g_free(watchpoint);
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}
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/* Remove all matching watchpoints. */
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void cpu_watchpoint_remove_all(CPUState *cpu, int mask)
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{
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CPUWatchpoint *wp, *next;
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QTAILQ_FOREACH_SAFE(wp, &cpu->watchpoints, entry, next) {
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if (wp->flags & mask) {
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cpu_watchpoint_remove_by_ref(cpu, wp);
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}
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}
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}
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