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X-Received-From: 2a00:1450:4864:20::442 Subject: [Qemu-devel] [PATCH 07/13] target/arm/arm-semi: Factor out implementation of SYS_READ 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: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" Factor out the implementation of SYS_READ via the new function tables. Signed-off-by: Peter Maydell Reviewed-by: Alex Benn=C3=A9e --- target/arm/arm-semi.c | 57 ++++++++++++++++++++++++++++--------------- 1 file changed, 37 insertions(+), 20 deletions(-) diff --git a/target/arm/arm-semi.c b/target/arm/arm-semi.c index 0dec4c04e2f..48a10dd3c3a 100644 --- a/target/arm/arm-semi.c +++ b/target/arm/arm-semi.c @@ -347,6 +347,8 @@ static target_ulong arm_gdb_syscall(ARMCPU *cpu, gdb_sy= scall_complete_cb cb, typedef uint32_t sys_closefn(TaskState *ts, ARMCPU *cpu, GuestFD *gf); typedef uint32_t sys_writefn(TaskState *ts, ARMCPU *cpu, GuestFD *gf, target_ulong buf, uint32_t len); +typedef uint32_t sys_readfn(TaskState *ts, ARMCPU *cpu, GuestFD *gf, + target_ulong buf, uint32_t len); =20 static uint32_t host_closefn(TaskState *ts, ARMCPU *cpu, GuestFD *gf) { @@ -374,6 +376,29 @@ static uint32_t host_writefn(TaskState *ts, ARMCPU *cp= u, GuestFD *gf, return len - ret; } =20 +static uint32_t host_readfn(TaskState *ts, ARMCPU *cpu, GuestFD *gf, + target_ulong buf, uint32_t len) +{ + uint32_t ret; +#ifndef CONFIG_USER_ONLY + CPUARMState *env =3D &cpu->env; +#endif + char *s =3D lock_user(VERIFY_WRITE, buf, len, 0); + if (!s) { + /* return bytes not read */ + return len; + } + do { + ret =3D set_swi_errno(ts, read(gf->hostfd, s, len)); + } while (ret =3D=3D -1 && errno =3D=3D EINTR); + unlock_user(s, buf, len); + if (ret =3D=3D (uint32_t)-1) { + ret =3D 0; + } + /* Return bytes not read */ + return len - ret; +} + static uint32_t gdb_closefn(TaskState *ts, ARMCPU *cpu, GuestFD *gf) { return arm_gdb_syscall(cpu, arm_semi_cb, "close,%x", gf->hostfd); @@ -387,19 +412,30 @@ static uint32_t gdb_writefn(TaskState *ts, ARMCPU *cp= u, GuestFD *gf, gf->hostfd, buf, len); } =20 +static uint32_t gdb_readfn(TaskState *ts, ARMCPU *cpu, GuestFD *gf, + target_ulong buf, uint32_t len) +{ + arm_semi_syscall_len =3D len; + return arm_gdb_syscall(cpu, arm_semi_cb, "read,%x,%x,%x", + gf->hostfd, buf, len); +} + typedef struct GuestFDFunctions { sys_closefn *closefn; sys_writefn *writefn; + sys_readfn *readfn; } GuestFDFunctions; =20 static const GuestFDFunctions guestfd_fns[] =3D { [GuestFDHost] =3D { .closefn =3D host_closefn, .writefn =3D host_writefn, + .readfn =3D host_readfn, }, [GuestFDGDB] =3D { .closefn =3D gdb_closefn, .writefn =3D gdb_writefn, + .readfn =3D gdb_readfn, }, }; =20 @@ -551,26 +587,7 @@ target_ulong do_arm_semihosting(CPUARMState *env) return set_swi_errno(ts, -1); } =20 - if (use_gdb_syscalls()) { - arm_semi_syscall_len =3D len; - return arm_gdb_syscall(cpu, arm_semi_cb, "read,%x,%x,%x", - gf->hostfd, arg1, len); - } else { - s =3D lock_user(VERIFY_WRITE, arg1, len, 0); - if (!s) { - /* return bytes not read */ - return len; - } - do { - ret =3D set_swi_errno(ts, read(gf->hostfd, s, len)); - } while (ret =3D=3D -1 && errno =3D=3D EINTR); - unlock_user(s, arg1, len); - if (ret =3D=3D (uint32_t)-1) { - ret =3D 0; - } - /* Return bytes not read */ - return len - ret; - } + return guestfd_fns[gf->type].readfn(ts, cpu, gf, arg1, len); case TARGET_SYS_READC: qemu_log_mask(LOG_UNIMP, "%s: SYS_READC not implemented", __func__= ); return 0; --=20 2.20.1