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[97.126.123.70]) by smtp.gmail.com with ESMTPSA id z3sm50137807pfz.155.2020.03.10.23.44.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 10 Mar 2020 23:44:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=B3XDGQrOIHo2Z/Fxm4hqpcuhDa9MTHMM7/GJHSmNf48=; b=GshumYDGLFLuvesKBTQC9q0ilBA4N4T54w6gyQPr9gXCq4SD15BazgVA4Dze02YJEj RdGGW+qMy4eYhuAM0HTSXQYYOVfGekhn8MoWFP3NgI0+Zy0pi69L6o9X5xJJ+qruIMw4 dYH1Q8KSF1a6SwDOgg8y3js+Ib15hBL3oSa3V4M5tqp5C6pD5AIRJuxNY0GSDRpKkukt 4dDaPwC5j+or5ACIrzO0WHc0CQ6kE3Iojl84TVuDMy9u9ffvwHxcipzjndCplSySkJ6u dkGCMiaURON6IW0WxGhs1uTyMSL4kQhHmqUsoLARvngm3bTwVE4Cnn/CGh7RMRP1Zkmw DskA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=B3XDGQrOIHo2Z/Fxm4hqpcuhDa9MTHMM7/GJHSmNf48=; b=p/S70XvQ0F9fNM120i7gJOynfNH79XUsrFMZawi0+3M/htGclLPl6r80S33aR5vOMR W65/7pfSFsyUOrvTuwU3XHOfcm3+wn9/qojXsBUi9P6ZpFrzkslGrSmwJGZnv0Etrqkx HZAZZDYEiXSADCdCsBKxqB1kNGZvqUXAC3uBVEQO7uYIfdx6FNXcuMc+ZxgwFf5UGRww SUidxA4ica+ucIzL1bmoYNX1rLAZAuROcqU/WHTHTXjiy/hWTPCmO8lx8McAwq32pZ+j S9eMyoPDDpKCsdsthbdo8UocyCTe0OrTL5gJunwdDPTATnw1NBIWMhSYz75/CngZG8cg Q3Rg== X-Gm-Message-State: ANhLgQ0V8zPOtg0/cgOnwnRewbK2eOB5RNEFGM4ReSwwhNbjawbaats0 mBTcEUJ78dRqBuCeeJ/aQHcF6txKsXA= X-Google-Smtp-Source: ADFU+vsDE5YtRcI3StH6dTp1gXyvB9ugFozopyK1HGRiWTX0lDd2N6a4UY92uZlvFbLbCQ0wK4CZPA== X-Received: by 2002:aa7:9732:: with SMTP id k18mr1368276pfg.231.1583909065441; Tue, 10 Mar 2020 23:44:25 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH 03/16] exec: Add cpu_probe_watchpoint Date: Tue, 10 Mar 2020 23:44:07 -0700 Message-Id: <20200311064420.30606-4-richard.henderson@linaro.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200311064420.30606-1-richard.henderson@linaro.org> References: <20200311064420.30606-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:4864:20::542 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, qemu-arm@nongnu.org Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @linaro.org) Content-Type: text/plain; charset="utf-8" Allow probing of a watchpoint *without* raising an exception. This is of most use for no-fault loads, which should indicate via some architectural means that the load did not occur. Signed-off-by: Richard Henderson --- include/hw/core/cpu.h | 7 +++++++ exec.c | 19 +++++++++++++++++++ 2 files changed, 26 insertions(+) diff --git a/include/hw/core/cpu.h b/include/hw/core/cpu.h index 73e9a869a4..8ec44267a4 100644 --- a/include/hw/core/cpu.h +++ b/include/hw/core/cpu.h @@ -1090,6 +1090,12 @@ static inline void cpu_check_watchpoint(CPUState *cp= u, vaddr addr, vaddr len, { } =20 +static inline bool cpu_probe_watchpoint(CPUState *cpu, vaddr addr, vaddr l= en, + int flags) +{ + return false; +} + static inline int cpu_watchpoint_address_matches(CPUState *cpu, vaddr addr, vaddr len) { @@ -1104,6 +1110,7 @@ void cpu_watchpoint_remove_by_ref(CPUState *cpu, CPUW= atchpoint *watchpoint); void cpu_watchpoint_remove_all(CPUState *cpu, int mask); void cpu_check_watchpoint(CPUState *cpu, vaddr addr, vaddr len, MemTxAttrs attrs, int flags, uintptr_t ra); +bool cpu_probe_watchpoint(CPUState *cpu, vaddr addr, vaddr len, int flags); int cpu_watchpoint_address_matches(CPUState *cpu, vaddr addr, vaddr len); #endif =20 diff --git a/exec.c b/exec.c index 0cc500d53a..2b8f601b9e 100644 --- a/exec.c +++ b/exec.c @@ -2735,6 +2735,25 @@ void cpu_check_watchpoint(CPUState *cpu, vaddr addr,= vaddr len, } } =20 +bool cpu_probe_watchpoint(CPUState *cpu, vaddr addr, vaddr len, int flags) +{ + CPUClass *cc =3D CPU_GET_CLASS(cpu); + CPUWatchpoint *wp; + + assert(tcg_enabled()); + + addr =3D cc->adjust_watchpoint_address(cpu, addr, len); + QTAILQ_FOREACH(wp, &cpu->watchpoints, entry) { + if (watchpoint_address_matches(wp, addr, len) &&=20 + (wp->flags & flags) && + (!(wp->flags & BP_CPU) || + !cc->debug_check_watchpoint(cpu, wp))) { + return true; + } + } + return false; +} + static MemTxResult flatview_read(FlatView *fv, hwaddr addr, MemTxAttrs attrs, void *buf, hwaddr len); static MemTxResult flatview_write(FlatView *fv, hwaddr addr, MemTxAttrs at= trs, --=20 2.20.1