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Wed, 07 Jun 2023 09:49:15 -0700 (PDT) Received: from localhost.localdomain ([223.104.40.226]) by smtp.gmail.com with ESMTPSA id 30-20020a17090a001e00b00250bf8495b3sm1671808pja.39.2023.06.07.09.49.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 07 Jun 2023 09:49:15 -0700 (PDT) From: Yeqi Fu To: alex.bennee@linaro.org Cc: richard.henderson@linaro.org, qemu-devel@nongnu.org, Yeqi Fu , Riku Voipio Subject: [RFC v2 2/6] Add the libnative library Date: Thu, 8 Jun 2023 00:47:46 +0800 Message-Id: <20230607164750.829586-3-fufuyqqqqqq@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230607164750.829586-1-fufuyqqqqqq@gmail.com> References: <20230607164750.829586-1-fufuyqqqqqq@gmail.com> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::f36; envelope-from=fufuyqqqqqq@gmail.com; helo=mail-qv1-xf36.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, HK_RANDOM_ENVFROM=0.001, HK_RANDOM_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Signed-off-by: Yeqi Fu --- common-user/native/libnative.c | 65 ++++++++++++++++++++++++++++++++++ include/native/libnative.h | 11 ++++++ include/native/native-func.h | 11 ++++++ 3 files changed, 87 insertions(+) create mode 100644 common-user/native/libnative.c create mode 100644 include/native/libnative.h create mode 100644 include/native/native-func.h diff --git a/common-user/native/libnative.c b/common-user/native/libnative.c new file mode 100644 index 0000000000..d40e43c6fe --- /dev/null +++ b/common-user/native/libnative.c @@ -0,0 +1,65 @@ +#include +#include + +#include "native/libnative.h" +#include "native/native-func.h" + +#define STR_MACRO(str) #str +#define STR(num) STR_MACRO(num) + +#if defined(TARGET_I386) || defined(TARGET_X86_64) + +/* unused opcode */ +#define __PREFIX_INSTR \ + ".byte 0x0f,0xff;" + +#define NATIVE_CALL_EXPR(func) \ + __PREFIX_INSTR \ + ".word " STR(func) ";" : :: +#endif + +#if defined(TARGET_ARM) || defined(TARGET_AARCH64) + +/* unused syscall number */ +#define __PREFIX_INSTR \ + "svc 0xff;" + +#define NATIVE_CALL_EXPR(func) \ + __PREFIX_INSTR \ + ".word " STR(func) ";" : :: + +#endif + +#if defined(TARGET_MIPS) || defined(TARGET_MIPS64) + +/* unused bytes in syscall instructions */ +#define NATIVE_CALL_EXPR(func) \ + ".long " STR((0x1 << 24) + (func << 8) + 0xC) ";" : :: + +#endif + +void *memcpy(void *dest, const void *src, size_t n) +{ + __asm__ volatile(NATIVE_CALL_EXPR(NATIVE_MEMCPY)); +} + +int memcmp(const void *s1, const void *s2, size_t n) +{ + __asm__ volatile(NATIVE_CALL_EXPR(NATIVE_MEMCMP)); +} +void *memset(void *s, int c, size_t n) +{ + __asm__ volatile(NATIVE_CALL_EXPR(NATIVE_MEMSET)); +} +char *strcpy(char *dest, const char *src) +{ + __asm__ volatile(NATIVE_CALL_EXPR(NATIVE_STRCPY)); +} +int strcmp(const char *s1, const char *s2) +{ + __asm__ volatile(NATIVE_CALL_EXPR(NATIVE_STRCMP)); +} +char *strcat(char *dest, const char *src) +{ + __asm__ volatile(NATIVE_CALL_EXPR(NATIVE_STRCAT)); +} diff --git a/include/native/libnative.h b/include/native/libnative.h new file mode 100644 index 0000000000..d3c24f89f4 --- /dev/null +++ b/include/native/libnative.h @@ -0,0 +1,11 @@ +#ifndef __LIBNATIVE_H__ +#define __LIBNATIVE_H__ + +void *memcpy(void *dest, const void *src, size_t n); +int memcmp(const void *s1, const void *s2, size_t n); +void *memset(void *s, int c, size_t n); +char *strcpy(char *dest, const char *src); +int strcmp(const char *s1, const char *s2); +char *strcat(char *dest, const char *src); + +#endif /* __LIBNATIVE_H__ */ diff --git a/include/native/native-func.h b/include/native/native-func.h new file mode 100644 index 0000000000..d48a8e547a --- /dev/null +++ b/include/native/native-func.h @@ -0,0 +1,11 @@ +#ifndef __NATIVE_FUNC_H__ +#define __NATIVE_FUNC_H__ + +#define NATIVE_MEMCPY 0x1001 +#define NATIVE_MEMCMP 0x1002 +#define NATIVE_MEMSET 0x1003 +#define NATIVE_STRCPY 0x1004 +#define NATIVE_STRCMP 0x1005 +#define NATIVE_STRCAT 0x1006 + +#endif