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[81.2.115.148]) by smtp.gmail.com with ESMTPSA id 5sm18029779wrk.86.2019.10.14.09.05.10 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 14 Oct 2019 09:05:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:subject:date:message-id:in-reply-to:references:mime-version :content-transfer-encoding; bh=w2zTSs9Y2lp9+9zNL0MEH+1G0Ie/vtJdarrnfCIzakc=; b=ho/6xePRn1FeY6q/S4khg/RQpBlK1kXybYjdO3jKVUIXTrAWY5PluZndoSY5sci+Bs M5/nsr57Lm/KYm6nzWsX2NATUwOK4gSEuE4Frs5OncfHGvYwrx1osp671uK/hGlIFiLj hVp499ZsuQSDoUEYJ+52otFfAI03ujLK97RX0TTVcjlINbiZ5Zo9aa9NSvKvN/oLXCVI J9kWmc+kGUF9up28o+GFqCEbp5wKC8NgehEkfkZweKWMvuRm7/LLI8exzGx2nau0Ukwe OoPluLUn1xhskKNLuWndIVMbvEUGDjIU040mEWi/VmWiXHX6fw2tl6Hnto4Ld7BqekFz 3hfA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=w2zTSs9Y2lp9+9zNL0MEH+1G0Ie/vtJdarrnfCIzakc=; b=jCTFVlb5htwh7oiB+dMTyWprTK0zVK9+BvgvCeJ86fOVKY1PDCYCSe428goYLKBmLO hDOpfHybxsU1K9553qelMux2gCABjQ5wb1Y39OUNULpu8QHYYcGaDM6AbhtebckQ5Q+b woytGqi3cD2vNroacn+LHGpUpE0q/3VPMAWQAVMLFc2ogQRuJXAqygIJ/aC9zcHr5zt6 SMpkVHvsBMuFN2Jl1vi2tSgczf+4YV17ujBXhHnMvEC2pdyqFRyjkYl5i96+qWXfD69x ghFzSH0KE8RidNCZc2wfeavfDTDS7g3ITJ2VydF56i+h2nAQZMcjabqVm1O2O8QXh3YE XH4g== X-Gm-Message-State: APjAAAUVjiAhOLOMePMimrNKwbQZkI0An4dAPjmJGiKDwiY+MoVu21bA F3yq5DtZOrzlXVcX36GWVjArAnwUb7FjBg== X-Google-Smtp-Source: APXvYqzcjy/gX9vD0C32TEnJZW+rGCHtCZmYKyuaLddR3+Zty1TrRwyYxhBAgjRo2Ylp5+4RRDNqSg== X-Received: by 2002:a5d:55d0:: with SMTP id i16mr27672099wrw.150.1571069111200; Mon, 14 Oct 2019 09:05:11 -0700 (PDT) From: Peter Maydell To: qemu-devel@nongnu.org Subject: [PULL 38/68] target/arm/arm-semi: Implement SH_EXT_EXIT_EXTENDED extension Date: Mon, 14 Oct 2019 17:03:34 +0100 Message-Id: <20191014160404.19553-39-peter.maydell@linaro.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191014160404.19553-1-peter.maydell@linaro.org> References: <20191014160404.19553-1-peter.maydell@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2a00:1450:4864:20::443 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: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @linaro.org) SH_EXT_EXIT_EXTENDED is a v2.0 semihosting extension: it indicates that the implementation supports the SYS_EXIT_EXTENDED function. This function allows both A64 and A32/T32 guests to exit with a specified exit status, unlike the older SYS_EXIT function which only allowed this for A64 guests. Implement this extension. Signed-off-by: Peter Maydell Reviewed-by: Alex Benn=C3=A9e Message-id: 20190916141544.17540-15-peter.maydell@linaro.org --- target/arm/arm-semi.c | 19 ++++++++++++++----- 1 file changed, 14 insertions(+), 5 deletions(-) diff --git a/target/arm/arm-semi.c b/target/arm/arm-semi.c index 57491740d73..f65d8c907e8 100644 --- a/target/arm/arm-semi.c +++ b/target/arm/arm-semi.c @@ -59,6 +59,7 @@ #define TARGET_SYS_HEAPINFO 0x16 #define TARGET_SYS_EXIT 0x18 #define TARGET_SYS_SYNCCACHE 0x19 +#define TARGET_SYS_EXIT_EXTENDED 0x20 =20 /* ADP_Stopped_ApplicationExit is used for exit(0), * anything else is implemented as exit(1) */ @@ -513,12 +514,15 @@ static uint32_t gdb_flenfn(ARMCPU *cpu, GuestFD *gf) #define SHFB_MAGIC_2 0x46 #define SHFB_MAGIC_3 0x42 =20 +/* Feature bits reportable in feature byte 0 */ +#define SH_EXT_EXIT_EXTENDED (1 << 0) + static const uint8_t featurefile_data[] =3D { SHFB_MAGIC_0, SHFB_MAGIC_1, SHFB_MAGIC_2, SHFB_MAGIC_3, - 0, /* Feature byte 0 */ + SH_EXT_EXIT_EXTENDED, /* Feature byte 0 */ }; =20 static void init_featurefile_guestfd(int guestfd) @@ -1042,11 +1046,14 @@ target_ulong do_arm_semihosting(CPUARMState *env) return 0; } case TARGET_SYS_EXIT: - if (is_a64(env)) { + case TARGET_SYS_EXIT_EXTENDED: + if (nr =3D=3D TARGET_SYS_EXIT_EXTENDED || is_a64(env)) { /* - * The A64 version of this call takes a parameter block, + * The A64 version of SYS_EXIT takes a parameter block, * so the application-exit type can return a subcode which * is the exit status code from the application. + * SYS_EXIT_EXTENDED is an a new-in-v2.0 optional function + * which allows A32/T32 guests to also provide a status code. */ GET_ARG(0); GET_ARG(1); @@ -1058,8 +1065,10 @@ target_ulong do_arm_semihosting(CPUARMState *env) } } else { /* - * ARM specifies only Stopped_ApplicationExit as normal - * exit, everything else is considered an error + * The A32/T32 version of SYS_EXIT specifies only + * Stopped_ApplicationExit as normal exit, but does not + * allow the guest to specify the exit status code. + * Everything else is considered an error. */ ret =3D (args =3D=3D ADP_Stopped_ApplicationExit) ? 0 : 1; } --=20 2.20.1