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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>coverity
Philippe Mathieu-Daudé
2 years ago
3 changed files with 144 additions and 124 deletions
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/*
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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/main-loop.h" |
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#include "qemu/error-report.h" |
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#include "exec/exec-all.h" |
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#include "exec/translate-all.h" |
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#include "sysemu/tcg.h" |
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#include "sysemu/replay.h" |
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#include "hw/core/tcg-cpu-ops.h" |
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#include "hw/core/cpu.h" |
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/*
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* Return true if this watchpoint address matches the specified |
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* access (ie the address range covered by the watchpoint overlaps |
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* partially or completely with the address range covered by the |
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* access). |
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*/ |
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static inline bool watchpoint_address_matches(CPUWatchpoint *wp, |
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vaddr addr, vaddr len) |
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{ |
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/*
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* We know the lengths are non-zero, but a little caution is |
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* required to avoid errors in the case where the range ends |
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* exactly at the top of the address space and so addr + len |
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* wraps round to zero. |
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*/ |
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vaddr wpend = wp->vaddr + wp->len - 1; |
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vaddr addrend = addr + len - 1; |
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return !(addr > wpend || wp->vaddr > addrend); |
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} |
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/* Return flags for watchpoints that match addr + prot. */ |
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int cpu_watchpoint_address_matches(CPUState *cpu, vaddr addr, vaddr len) |
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{ |
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CPUWatchpoint *wp; |
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int ret = 0; |
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QTAILQ_FOREACH(wp, &cpu->watchpoints, entry) { |
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if (watchpoint_address_matches(wp, addr, len)) { |
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ret |= wp->flags; |
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} |
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} |
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return ret; |
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} |
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/* Generate a debug exception if a watchpoint has been hit. */ |
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void cpu_check_watchpoint(CPUState *cpu, vaddr addr, vaddr len, |
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MemTxAttrs attrs, int flags, uintptr_t ra) |
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{ |
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CPUClass *cc = CPU_GET_CLASS(cpu); |
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CPUWatchpoint *wp; |
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assert(tcg_enabled()); |
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if (cpu->watchpoint_hit) { |
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/*
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* We re-entered the check after replacing the TB. |
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* Now raise the debug interrupt so that it will |
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* trigger after the current instruction. |
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*/ |
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bql_lock(); |
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cpu_interrupt(cpu, CPU_INTERRUPT_DEBUG); |
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bql_unlock(); |
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return; |
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} |
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if (cc->tcg_ops->adjust_watchpoint_address) { |
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/* this is currently used only by ARM BE32 */ |
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addr = cc->tcg_ops->adjust_watchpoint_address(cpu, addr, len); |
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} |
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assert((flags & ~BP_MEM_ACCESS) == 0); |
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QTAILQ_FOREACH(wp, &cpu->watchpoints, entry) { |
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int hit_flags = wp->flags & flags; |
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if (hit_flags && watchpoint_address_matches(wp, addr, len)) { |
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if (replay_running_debug()) { |
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/*
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* replay_breakpoint reads icount. |
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* Force recompile to succeed, because icount may |
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* be read only at the end of the block. |
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*/ |
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if (!cpu->neg.can_do_io) { |
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/* Force execution of one insn next time. */ |
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cpu->cflags_next_tb = 1 | CF_NOIRQ | curr_cflags(cpu); |
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cpu_loop_exit_restore(cpu, ra); |
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} |
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/*
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* Don't process the watchpoints when we are |
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* in a reverse debugging operation. |
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*/ |
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replay_breakpoint(); |
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return; |
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} |
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wp->flags |= hit_flags << BP_HIT_SHIFT; |
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wp->hitaddr = MAX(addr, wp->vaddr); |
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wp->hitattrs = attrs; |
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if (wp->flags & BP_CPU |
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&& cc->tcg_ops->debug_check_watchpoint |
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&& !cc->tcg_ops->debug_check_watchpoint(cpu, wp)) { |
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wp->flags &= ~BP_WATCHPOINT_HIT; |
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continue; |
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} |
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cpu->watchpoint_hit = wp; |
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mmap_lock(); |
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/* This call also restores vCPU state */ |
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tb_check_watchpoint(cpu, ra); |
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if (wp->flags & BP_STOP_BEFORE_ACCESS) { |
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cpu->exception_index = EXCP_DEBUG; |
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mmap_unlock(); |
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cpu_loop_exit(cpu); |
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} else { |
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/* Force execution of one insn next time. */ |
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cpu->cflags_next_tb = 1 | CF_NOIRQ | curr_cflags(cpu); |
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mmap_unlock(); |
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cpu_loop_exit_noexc(cpu); |
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} |
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} else { |
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wp->flags &= ~BP_WATCHPOINT_HIT; |
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} |
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} |
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} |
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