From patchwork Tue Feb 15 20:10:44 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Laurent Vivier X-Patchwork-Id: 83294 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [199.232.76.165]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id AFFC9B70AA for ; Wed, 16 Feb 2011 07:14:25 +1100 (EST) Received: from localhost ([127.0.0.1]:47954 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1PpRFo-0003Zc-Kp for incoming@patchwork.ozlabs.org; Tue, 15 Feb 2011 15:12:08 -0500 Received: from [140.186.70.92] (port=52465 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1PpREZ-0003Xs-Uo for qemu-devel@nongnu.org; Tue, 15 Feb 2011 15:10:53 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1PpREX-0004dv-VP for qemu-devel@nongnu.org; Tue, 15 Feb 2011 15:10:51 -0500 Received: from smtp6-g21.free.fr ([212.27.42.6]:60089) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1PpREX-0004dT-3X for qemu-devel@nongnu.org; Tue, 15 Feb 2011 15:10:49 -0500 Received: from Quad (unknown [78.238.229.36]) by smtp6-g21.free.fr (Postfix) with ESMTP id 3ED298239B; Tue, 15 Feb 2011 21:10:42 +0100 (CET) Received: from laurent by Quad with local (Exim 4.72) (envelope-from ) id 1PpREW-00080s-RW; Tue, 15 Feb 2011 21:10:48 +0100 From: Laurent Vivier To: Riku Voipio Date: Tue, 15 Feb 2011 21:10:44 +0100 Message-Id: <1297800644-30773-2-git-send-email-laurent@vivier.eu> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1297800644-30773-1-git-send-email-laurent@vivier.eu> References: <1297800644-30773-1-git-send-email-laurent@vivier.eu> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 3) X-Received-From: 212.27.42.6 Cc: qemu-devel@nongnu.org, Laurent Vivier Subject: [Qemu-devel] [PATCH 2/2] linux-user: in linux-user/strace.c, tswap() is useless X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Syscall parameters are already swapped by the caller. This patch removes useless tswap() from strace.c $ QEMU_STRACE=1 chroot /m68k mknod myramdisk b 1 1 with tswap() ... 29944 mknod("myramdisk",026630200000) = 0 ... without tswap() ... 30042 mknod("myramdisk",S_IFBLK|0666,makedev(1,1)) = 0 ... natively: $ strace touch mytouch ... open("mytouch", O_WRONLY|O_CREAT|O_NOCTTY|O_NONBLOCK, 0666) = 3 ... $ QEMU_STRACE=1 chroot /m68k touch mytouch with tswap() ... 30368 open("/usr/share/locale/locale.alias",O_RDONLY) = 3 30368 fstat64(50331648,0x4080032c) = 0 ... 30368 open("mytouch",O_RDONLY|O_CREAT|O_LARGEFILE|O_NOCTTY|O_NONBLOCK|0x1) = 0 ... without tswap() ... 30572 open("/usr/share/locale/locale.alias",O_RDONLY) = 3 30572 fstat64(3,0x4080032c) = 0 ... 30572 open("mytouch",O_WRONLY|O_CREAT|O_LARGEFILE|O_NOCTTY|O_NONBLOCK,0666) = 0 Signed-off-by: Laurent Vivier --- linux-user/strace.c | 71 +++++++++++++++++++++------------------------------ 1 files changed, 29 insertions(+), 42 deletions(-) diff --git a/linux-user/strace.c b/linux-user/strace.c index 05277c0..86ad5aa 100644 --- a/linux-user/strace.c +++ b/linux-user/strace.c @@ -441,14 +441,11 @@ get_comma(int last) } static void -print_flags(const struct flags *f, abi_long tflags, int last) +print_flags(const struct flags *f, abi_long flags, int last) { const char *sep = ""; - int flags; int n; - flags = (int)tswap32(tflags); - if ((flags == 0) && (f->f_value == 0)) { gemu_log("%s%s", f->f_string, get_comma(last)); return; @@ -476,10 +473,8 @@ print_flags(const struct flags *f, abi_long tflags, int last) } static void -print_at_dirfd(abi_long tdirfd, int last) +print_at_dirfd(abi_long dirfd, int last) { - int dirfd = tswap32(tdirfd); - #ifdef AT_FDCWD if (dirfd == AT_FDCWD) { gemu_log("AT_FDCWD%s", get_comma(last)); @@ -490,11 +485,10 @@ print_at_dirfd(abi_long tdirfd, int last) } static void -print_file_mode(abi_long tmode, int last) +print_file_mode(abi_long mode, int last) { const char *sep = ""; const struct flags *m; - mode_t mode = (mode_t)tswap32(tmode); for (m = &mode_flags[0]; m->f_string != NULL; m++) { if ((m->f_value & mode) == m->f_value) { @@ -514,10 +508,8 @@ print_file_mode(abi_long tmode, int last) } static void -print_open_flags(abi_long tflags, int last) +print_open_flags(abi_long flags, int last) { - int flags = tswap32(tflags); - print_flags(open_access_flags, flags & TARGET_O_ACCMODE, 1); flags &= ~TARGET_O_ACCMODE; if (flags == 0) { @@ -620,7 +612,7 @@ print_accept(const struct syscallname *name, abi_long arg3, abi_long arg4, abi_long arg5) { print_syscall_prologue(name); - print_raw_param("%d", tswap32(arg0), 0); + print_raw_param("%d", arg0, 0); print_pointer(arg1, 0); print_number(arg2, 1); print_syscall_epilogue(name); @@ -698,7 +690,7 @@ print_execv(const struct syscallname *name, { print_syscall_prologue(name); print_string(arg0, 0); - print_raw_param("0x" TARGET_ABI_FMT_lx, tswapl(arg1), 1); + print_raw_param("0x" TARGET_ABI_FMT_lx, arg1, 1); print_syscall_epilogue(name); } #endif @@ -742,13 +734,8 @@ print_fchownat(const struct syscallname *name, print_syscall_prologue(name); print_at_dirfd(arg0, 0); print_string(arg1, 0); -#ifdef USE_UID16 - print_raw_param("%d", tswap16(arg2), 0); - print_raw_param("%d", tswap16(arg3), 0); -#else - print_raw_param("%d", tswap32(arg2), 0); - print_raw_param("%d", tswap32(arg3), 0); -#endif + print_raw_param("%d", arg2, 0); + print_raw_param("%d", arg3, 0); print_flags(at_file_flags, arg4, 1); print_syscall_epilogue(name); } @@ -761,7 +748,7 @@ print_fcntl(const struct syscallname *name, abi_long arg3, abi_long arg4, abi_long arg5) { print_syscall_prologue(name); - print_raw_param("%d", tswap32(arg0), 0); + print_raw_param("%d", arg0, 0); print_flags(fcntl_flags, arg1, 0); /* * TODO: check flags and print following argument only @@ -842,7 +829,7 @@ print_fstat(const struct syscallname *name, abi_long arg3, abi_long arg4, abi_long arg5) { print_syscall_prologue(name); - print_raw_param("%d", tswap32(arg0), 0); + print_raw_param("%d", arg0, 0); print_pointer(arg1, 1); print_syscall_epilogue(name); } @@ -894,14 +881,14 @@ print_mknod(const struct syscallname *name, abi_long arg0, abi_long arg1, abi_long arg2, abi_long arg3, abi_long arg4, abi_long arg5) { - int hasdev = (tswapl(arg1) & (S_IFCHR|S_IFBLK)); + int hasdev = (arg1 & (S_IFCHR|S_IFBLK)); print_syscall_prologue(name); print_string(arg0, 0); print_file_mode(arg1, (hasdev == 0)); if (hasdev) { - print_raw_param("makedev(%d", major(tswapl(arg2)), 0); - print_raw_param("%d)", minor(tswapl(arg2)), 1); + print_raw_param("makedev(%d", major(arg2), 0); + print_raw_param("%d)", minor(arg2), 1); } print_syscall_epilogue(name); } @@ -913,15 +900,15 @@ print_mknodat(const struct syscallname *name, abi_long arg0, abi_long arg1, abi_long arg2, abi_long arg3, abi_long arg4, abi_long arg5) { - int hasdev = (tswapl(arg2) & (S_IFCHR|S_IFBLK)); + int hasdev = (arg2 & (S_IFCHR|S_IFBLK)); print_syscall_prologue(name); print_at_dirfd(arg0, 0); print_string(arg1, 0); print_file_mode(arg2, (hasdev == 0)); if (hasdev) { - print_raw_param("makedev(%d", major(tswapl(arg3)), 0); - print_raw_param("%d)", minor(tswapl(arg3)), 1); + print_raw_param("makedev(%d", major(arg3), 0); + print_raw_param("%d)", minor(arg3), 1); } print_syscall_epilogue(name); } @@ -933,7 +920,7 @@ print_mq_open(const struct syscallname *name, abi_long arg0, abi_long arg1, abi_long arg2, abi_long arg3, abi_long arg4, abi_long arg5) { - int is_creat = (tswapl(arg1) & TARGET_O_CREAT); + int is_creat = (arg1 & TARGET_O_CREAT); print_syscall_prologue(name); print_string(arg0, 0); @@ -952,7 +939,7 @@ print_open(const struct syscallname *name, abi_long arg0, abi_long arg1, abi_long arg2, abi_long arg3, abi_long arg4, abi_long arg5) { - int is_creat = (tswap32(arg1) & TARGET_O_CREAT); + int is_creat = (arg1 & TARGET_O_CREAT); print_syscall_prologue(name); print_string(arg0, 0); @@ -969,7 +956,7 @@ print_openat(const struct syscallname *name, abi_long arg0, abi_long arg1, abi_long arg2, abi_long arg3, abi_long arg4, abi_long arg5) { - int is_creat = (tswap32(arg2) & TARGET_O_CREAT); + int is_creat = (arg2 & TARGET_O_CREAT); print_syscall_prologue(name); print_at_dirfd(arg0, 0); @@ -1018,7 +1005,7 @@ print_readlink(const struct syscallname *name, print_syscall_prologue(name); print_string(arg0, 0); print_pointer(arg1, 0); - print_raw_param("%u", tswapl(arg2), 1); + print_raw_param("%u", arg2, 1); print_syscall_epilogue(name); } #endif @@ -1033,7 +1020,7 @@ print_readlinkat(const struct syscallname *name, print_at_dirfd(arg0, 0); print_string(arg1, 0); print_pointer(arg2, 0); - print_raw_param("%u", tswapl(arg3), 1); + print_raw_param("%u", arg3, 1); print_syscall_epilogue(name); } #endif @@ -1223,11 +1210,11 @@ print_mmap(const struct syscallname *name, { print_syscall_prologue(name); print_pointer(arg0, 0); - print_raw_param("%d", tswapl(arg1), 0); + print_raw_param("%d", arg1, 0); print_flags(mmap_prot_flags, arg2, 0); print_flags(mmap_flags, arg3, 0); - print_raw_param("%d", tswapl(arg4), 0); - print_raw_param("%#x", tswapl(arg5), 1); + print_raw_param("%d", arg4, 0); + print_raw_param("%#x", arg5, 1); print_syscall_epilogue(name); } #define print_mmap2 print_mmap @@ -1241,7 +1228,7 @@ print_mprotect(const struct syscallname *name, { print_syscall_prologue(name); print_pointer(arg0, 0); - print_raw_param("%d", tswapl(arg1), 0); + print_raw_param("%d", arg1, 0); print_flags(mmap_prot_flags, arg2, 1); print_syscall_epilogue(name); } @@ -1255,7 +1242,7 @@ print_munmap(const struct syscallname *name, { print_syscall_prologue(name); print_pointer(arg0, 0); - print_raw_param("%d", tswapl(arg1), 1); + print_raw_param("%d", arg1, 1); print_syscall_epilogue(name); } #endif @@ -1269,7 +1256,7 @@ if( cmd == val ) { \ return; \ } - int cmd = (int)tswap32(tflag); + int cmd = (int)tflag; #ifdef FUTEX_PRIVATE_FLAG if (cmd & FUTEX_PRIVATE_FLAG) { gemu_log("FUTEX_PRIVATE_FLAG|"); @@ -1303,10 +1290,10 @@ print_futex(const struct syscallname *name, print_syscall_prologue(name); print_pointer(arg0, 0); print_futex_op(arg1, 0); - print_raw_param(",%d", tswapl(arg2), 0); + print_raw_param(",%d", arg2, 0); print_pointer(arg3, 0); /* struct timespec */ print_pointer(arg4, 0); - print_raw_param("%d", tswapl(arg4), 1); + print_raw_param("%d", arg4, 1); print_syscall_epilogue(name); } #endif