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([2602:ae:1547:e101:c626:2f70:ac99:7c97]) by smtp.gmail.com with ESMTPSA id b19-20020a63d813000000b003f66a518e48sm13607398pgh.86.2022.06.07.19.38.19 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 07 Jun 2022 19:38:19 -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=A64dW+WaFyjb845Uk+CMOuiOMbXND0hnQD9JlPmA29k=; b=n0yGGemfa6lY7iX0SbA+4Lt8CkKeEentA+WeHr1K4/HBKv1f4SOKNDSImu/ahtLQEt tcDUHOlj1+17RpvITIKLB1UNgqNgfslI+r2s93NmxlvMjfOuTZ7OYmtUFyTrW0oVgDA+ RJLh3RkrXCdpPUMm9HeXnFT1oJ0i0YtsEaXVfIq/oomLSM/80OAtOpYjvQ1zKCc2KOFI yJ3Ll7f+J1Mi2Ji20GHiJl8YmXLkFk4xiZgaF5BKb390BjGVzWEJI84wR2Sw0d2otTmR oLIpr2AJNg4o6lBwetYXZyiK24y8GyjHS53eZQ1p6X/C1HmcYZG2TDcy6SNaTpExSDWk cbJw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=A64dW+WaFyjb845Uk+CMOuiOMbXND0hnQD9JlPmA29k=; b=E3Vqgceaf+nKCTcIj3a6dWz7/q5X8yInGR96p0pPcyyspopvr094gPEoPOcSrlpdc7 e1ZZsgmnuN1g3LAHEinE0Y08HdL2E/PrSTRZs2Rgbx/h01jQjiiSHov0aJ5TiVVF642K PnVg57DJGqC6fxOKnTPcCu9uqUzOKNxhHcLlzTndl18GLevaasbbXwG3l4oOeW93OOFx KxBJPqJO3VDzFypjSwQe24Bkf9Xp2FyW+GT+YjDVOdTTAYbu5sE7LrgbiuKGWNujdLAB vkwF/i1KXMTfrQqugn3OPjM4KXhG9B7sP76/YbVqPDe8yD0RTSeoCUFGLuZ3tQNkq2ct AUQQ== X-Gm-Message-State: AOAM533CW1SY87QK90XeHXnUhpCk9p24mmB0akMd2AU31GfK0lerinJD Z6sQrYntwDQ4bfAJ2kLx8l8fCcnumVvBgA== X-Google-Smtp-Source: ABdhPJzzfvp6fIx4HNTYHpYJh7kwbMY9xJANM6rVQCUqpWaUoeFRWFjOzWq3N6+5/Gzu0f9xGRsNRA== X-Received: by 2002:a17:902:e484:b0:167:5b79:2b61 with SMTP id i4-20020a170902e48400b001675b792b61mr20812337ple.132.1654655900291; Tue, 07 Jun 2022 19:38:20 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH v4 3/3] target/nios2: Use semihosting/syscalls.h Date: Tue, 7 Jun 2022 19:38:16 -0700 Message-Id: <20220608023816.759426-4-richard.henderson@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220608023816.759426-1-richard.henderson@linaro.org> References: <20220608023816.759426-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::102b; envelope-from=richard.henderson@linaro.org; helo=mail-pj1-x102b.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, 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+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1654656014291100003 Content-Type: text/plain; charset="utf-8" This separates guest file descriptors from host file descriptors, and utilizes shared infrastructure for integration with gdbstub. Signed-off-by: Richard Henderson --- target/nios2/nios2-semi.c | 321 +++++++++----------------------------- 1 file changed, 77 insertions(+), 244 deletions(-) diff --git a/target/nios2/nios2-semi.c b/target/nios2/nios2-semi.c index 55061bb2dc..f76e8588c5 100644 --- a/target/nios2/nios2-semi.c +++ b/target/nios2/nios2-semi.c @@ -24,6 +24,7 @@ #include "qemu/osdep.h" #include "cpu.h" #include "exec/gdbstub.h" +#include "semihosting/syscalls.h" #include "semihosting/softmmu-uaccess.h" #include "qemu/log.h" =20 @@ -42,65 +43,33 @@ #define HOSTED_ISATTY 12 #define HOSTED_SYSTEM 13 =20 -static int translate_openflags(int flags) +static int host_to_gdb_errno(int err) { - int hf; - - if (flags & GDB_O_WRONLY) { - hf =3D O_WRONLY; - } else if (flags & GDB_O_RDWR) { - hf =3D O_RDWR; - } else { - hf =3D O_RDONLY; +#define E(X) case E##X: return GDB_E##X + switch (err) { + E(PERM); + E(NOENT); + E(INTR); + E(BADF); + E(ACCES); + E(FAULT); + E(BUSY); + E(EXIST); + E(NODEV); + E(NOTDIR); + E(ISDIR); + E(INVAL); + E(NFILE); + E(MFILE); + E(FBIG); + E(NOSPC); + E(SPIPE); + E(ROFS); + E(NAMETOOLONG); + default: + return GDB_EUNKNOWN; } - - if (flags & GDB_O_APPEND) { - hf |=3D O_APPEND; - } - if (flags & GDB_O_CREAT) { - hf |=3D O_CREAT; - } - if (flags & GDB_O_TRUNC) { - hf |=3D O_TRUNC; - } - if (flags & GDB_O_EXCL) { - hf |=3D O_EXCL; - } - - return hf; -} - -static bool translate_stat(CPUNios2State *env, target_ulong addr, - struct stat *s) -{ - struct gdb_stat *p; - - p =3D lock_user(VERIFY_WRITE, addr, sizeof(struct gdb_stat), 0); - - if (!p) { - return false; - } - p->gdb_st_dev =3D cpu_to_be32(s->st_dev); - p->gdb_st_ino =3D cpu_to_be32(s->st_ino); - p->gdb_st_mode =3D cpu_to_be32(s->st_mode); - p->gdb_st_nlink =3D cpu_to_be32(s->st_nlink); - p->gdb_st_uid =3D cpu_to_be32(s->st_uid); - p->gdb_st_gid =3D cpu_to_be32(s->st_gid); - p->gdb_st_rdev =3D cpu_to_be32(s->st_rdev); - p->gdb_st_size =3D cpu_to_be64(s->st_size); -#ifdef _WIN32 - /* Windows stat is missing some fields. */ - p->gdb_st_blksize =3D 0; - p->gdb_st_blocks =3D 0; -#else - p->gdb_st_blksize =3D cpu_to_be64(s->st_blksize); - p->gdb_st_blocks =3D cpu_to_be64(s->st_blocks); -#endif - p->gdb_st_atime =3D cpu_to_be32(s->st_atime); - p->gdb_st_mtime =3D cpu_to_be32(s->st_mtime); - p->gdb_st_ctime =3D cpu_to_be32(s->st_ctime); - unlock_user(p, addr, sizeof(struct gdb_stat)); - return true; +#undef E } =20 static void nios2_semi_u32_cb(CPUState *cs, uint64_t ret, int err) @@ -110,7 +79,7 @@ static void nios2_semi_u32_cb(CPUState *cs, uint64_t ret= , int err) target_ulong args =3D env->regs[R_ARG1]; =20 if (put_user_u32(ret, args) || - put_user_u32(err, args + 4)) { + put_user_u32(host_to_gdb_errno(err), args + 4)) { /* * The nios2 semihosting ABI does not provide any way to report th= is * error to the guest, so the best we can do is log it in qemu. @@ -129,7 +98,7 @@ static void nios2_semi_u64_cb(CPUState *cs, uint64_t ret= , int err) =20 if (put_user_u32(ret >> 32, args) || put_user_u32(ret, args + 4) || - put_user_u32(err, args + 8)) { + put_user_u32(host_to_gdb_errno(err), args + 8)) { /* No way to report this via nios2 semihosting ABI; just log it */ qemu_log_mask(LOG_GUEST_ERROR, "nios2-semihosting: return value " "discarded because argument block not writable\n"); @@ -142,22 +111,22 @@ static void nios2_semi_u64_cb(CPUState *cs, uint64_t = ret, int err) */ #define GET_ARG(n) do { \ if (get_user_ual(arg ## n, args + (n) * 4)) { \ - result =3D -1; \ - errno =3D EFAULT; \ goto failed; \ } \ } while (0) =20 +#define GET_ARG64(n) do { \ + if (get_user_ual(arg ## n, args + (n) * 4)) { \ + goto failed64; \ + } \ +} while (0) + void do_nios2_semihosting(CPUNios2State *env) { CPUState *cs =3D env_cpu(env); int nr; uint32_t args; target_ulong arg0, arg1, arg2, arg3; - void *p; - void *q; - uint32_t len; - uint32_t result; =20 nr =3D env->regs[R_ARG0]; args =3D env->regs[R_ARG1]; @@ -165,234 +134,98 @@ void do_nios2_semihosting(CPUNios2State *env) case HOSTED_EXIT: gdb_exit(env->regs[R_ARG0]); exit(env->regs[R_ARG0]); + case HOSTED_OPEN: GET_ARG(0); GET_ARG(1); GET_ARG(2); GET_ARG(3); - if (use_gdb_syscalls()) { - gdb_do_syscall(nios2_semi_u32_cb, "open,%s,%x,%x", arg0, (int)= arg1, - arg2, arg3); - return; - } else { - p =3D lock_user_string(arg0); - if (!p) { - result =3D -1; - errno =3D EFAULT; - } else { - result =3D open(p, translate_openflags(arg2), arg3); - unlock_user(p, arg0, 0); - } - } + semihost_sys_open(cs, nios2_semi_u32_cb, arg0, arg1, arg2, arg3); break; + case HOSTED_CLOSE: - { - /* Ignore attempts to close stdin/out/err. */ - GET_ARG(0); - int fd =3D arg0; - if (fd > 2) { - if (use_gdb_syscalls()) { - gdb_do_syscall(nios2_semi_u32_cb, "close,%x", arg0); - return; - } else { - result =3D close(fd); - } - } else { - result =3D 0; - } - break; - } + GET_ARG(0); + semihost_sys_close(cs, nios2_semi_u32_cb, arg0); + break; + case HOSTED_READ: GET_ARG(0); GET_ARG(1); GET_ARG(2); - len =3D arg2; - if (use_gdb_syscalls()) { - gdb_do_syscall(nios2_semi_u32_cb, "read,%x,%x,%x", - arg0, arg1, len); - return; - } else { - p =3D lock_user(VERIFY_WRITE, arg1, len, 0); - if (!p) { - result =3D -1; - errno =3D EFAULT; - } else { - result =3D read(arg0, p, len); - unlock_user(p, arg1, len); - } - } + semihost_sys_read(cs, nios2_semi_u32_cb, arg0, arg1, arg2); break; + case HOSTED_WRITE: GET_ARG(0); GET_ARG(1); GET_ARG(2); - len =3D arg2; - if (use_gdb_syscalls()) { - gdb_do_syscall(nios2_semi_u32_cb, "write,%x,%x,%x", - arg0, arg1, len); - return; - } else { - p =3D lock_user(VERIFY_READ, arg1, len, 1); - if (!p) { - result =3D -1; - errno =3D EFAULT; - } else { - result =3D write(arg0, p, len); - unlock_user(p, arg0, 0); - } - } + semihost_sys_write(cs, nios2_semi_u32_cb, arg0, arg1, arg2); break; + case HOSTED_LSEEK: - { - uint64_t off; - GET_ARG(0); - GET_ARG(1); - GET_ARG(2); - GET_ARG(3); - off =3D (uint32_t)arg2 | ((uint64_t)arg1 << 32); - if (use_gdb_syscalls()) { - gdb_do_syscall(nios2_semi_u64_cb, "lseek,%x,%lx,%x", - arg0, off, arg3); - } else { - off =3D lseek(arg0, off, arg3); - nios2_semi_u64_cb(cs, off, errno); - } - return; - } + GET_ARG64(0); + GET_ARG64(1); + GET_ARG64(2); + GET_ARG64(3); + semihost_sys_lseek(cs, nios2_semi_u64_cb, arg0, + deposit64(arg2, arg1, 32, 32), arg3); + break; + case HOSTED_RENAME: GET_ARG(0); GET_ARG(1); GET_ARG(2); GET_ARG(3); - if (use_gdb_syscalls()) { - gdb_do_syscall(nios2_semi_u32_cb, "rename,%s,%s", - arg0, (int)arg1, arg2, (int)arg3); - return; - } else { - p =3D lock_user_string(arg0); - q =3D lock_user_string(arg2); - if (!p || !q) { - result =3D -1; - errno =3D EFAULT; - } else { - result =3D rename(p, q); - } - unlock_user(p, arg0, 0); - unlock_user(q, arg2, 0); - } + semihost_sys_rename(cs, nios2_semi_u32_cb, arg0, arg1, arg2, arg3); break; + case HOSTED_UNLINK: GET_ARG(0); GET_ARG(1); - if (use_gdb_syscalls()) { - gdb_do_syscall(nios2_semi_u32_cb, "unlink,%s", - arg0, (int)arg1); - return; - } else { - p =3D lock_user_string(arg0); - if (!p) { - result =3D -1; - errno =3D EFAULT; - } else { - result =3D unlink(p); - unlock_user(p, arg0, 0); - } - } + semihost_sys_remove(cs, nios2_semi_u32_cb, arg0, arg1); break; + case HOSTED_STAT: GET_ARG(0); GET_ARG(1); GET_ARG(2); - if (use_gdb_syscalls()) { - gdb_do_syscall(nios2_semi_u32_cb, "stat,%s,%x", - arg0, (int)arg1, arg2); - return; - } else { - struct stat s; - p =3D lock_user_string(arg0); - if (!p) { - result =3D -1; - errno =3D EFAULT; - } else { - result =3D stat(p, &s); - unlock_user(p, arg0, 0); - } - if (result =3D=3D 0 && !translate_stat(env, arg2, &s)) { - result =3D -1; - errno =3D EFAULT; - } - } + semihost_sys_stat(cs, nios2_semi_u32_cb, arg0, arg1, arg2); break; + case HOSTED_FSTAT: GET_ARG(0); GET_ARG(1); - if (use_gdb_syscalls()) { - gdb_do_syscall(nios2_semi_u32_cb, "fstat,%x,%x", - arg0, arg1); - return; - } else { - struct stat s; - result =3D fstat(arg0, &s); - if (result =3D=3D 0 && !translate_stat(env, arg1, &s)) { - result =3D -1; - errno =3D EFAULT; - } - } + semihost_sys_fstat(cs, nios2_semi_u32_cb, arg0, arg1); break; + case HOSTED_GETTIMEOFDAY: - /* Only the tv parameter is used. tz is assumed NULL. */ GET_ARG(0); - if (use_gdb_syscalls()) { - gdb_do_syscall(nios2_semi_u32_cb, "gettimeofday,%x,%x", - arg0, 0); - return; - } else { - struct gdb_timeval *p; - int64_t rt =3D g_get_real_time(); - p =3D lock_user(VERIFY_WRITE, arg0, sizeof(struct gdb_timeval)= , 0); - if (!p) { - result =3D -1; - errno =3D EFAULT; - } else { - result =3D 0; - p->tv_sec =3D cpu_to_be32(rt / G_USEC_PER_SEC); - p->tv_usec =3D cpu_to_be64(rt % G_USEC_PER_SEC); - unlock_user(p, arg0, sizeof(struct gdb_timeval)); - } - } + GET_ARG(1); + semihost_sys_gettimeofday(cs, nios2_semi_u32_cb, arg0, arg1); break; + case HOSTED_ISATTY: GET_ARG(0); - if (use_gdb_syscalls()) { - gdb_do_syscall(nios2_semi_u32_cb, "isatty,%x", arg0); - return; - } else { - result =3D isatty(arg0); - } + semihost_sys_isatty(cs, nios2_semi_u32_cb, arg0); break; + case HOSTED_SYSTEM: GET_ARG(0); GET_ARG(1); - if (use_gdb_syscalls()) { - gdb_do_syscall(nios2_semi_u32_cb, "system,%s", - arg0, (int)arg1); - return; - } else { - p =3D lock_user_string(arg0); - if (!p) { - result =3D -1; - errno =3D EFAULT; - } else { - result =3D system(p); - unlock_user(p, arg0, 0); - } - } + semihost_sys_system(cs, nios2_semi_u32_cb, arg0, arg1); break; + default: qemu_log_mask(LOG_GUEST_ERROR, "nios2-semihosting: unsupported " "semihosting syscall %d\n", nr); - result =3D 0; + nios2_semi_u32_cb(cs, -1, ENOSYS); + break; + + failed: + nios2_semi_u32_cb(cs, -1, EFAULT); + break; + failed64: + nios2_semi_u64_cb(cs, -1, EFAULT); + break; } -failed: - nios2_semi_u32_cb(cs, result, errno); } --=20 2.34.1