Oktober 2009 - Vax-linux

[LV] [PATCH] VAX/Linux: Correct tmake_file setting
by Maciej W. Rozycki 04 Nov '09

04 Nov '09

Hello, This change: 2009-07-01 Maciej W. Rozycki <macro(a)linux-mips.org> * config.gcc (vax-*-linux*): Set tmake_file to vax/t-linux. inadvertently removed generic Linux settings from the vax-linux target Makefile fragment. Probably the most notable impact from this is that crt{begin,end}S.o files are built without -fPIC, which is obviously not what we want. The following fix works for me for --target=vax-linux, emitting correct relocations in the files mentioned and removing shared library static link-time warnings that resulted from the incorrect change. The configuration is not capable enough for regression testing yet. 2009-10-29 Maciej W. Rozycki <macro(a)linux-mips.org> * config.gcc (vax-*-linux*): Keep the original contents of tmake_file while adding vax/t-linux. OK to apply? Maciej gcc-4.5.0-20091029-vax-linux-tmake.patch Index: gcc-4.5.0-20091029-vax-linux/gcc/config.gcc =================================================================== --- gcc-4.5.0-20091029-vax-linux.orig/gcc/config.gcc +++ gcc-4.5.0-20091029-vax-linux/gcc/config.gcc @@ -2503,7 +2503,7 @@ v850-*-*) ;; vax-*-linux*) tm_file="${tm_file} dbxelf.h elfos.h svr4.h linux.h vax/elf.h vax/linux.h" - tmake_file=vax/t-linux + tmake_file="${tmake_file} vax/t-linux" ;; vax-*-netbsdelf*) tm_file="${tm_file} elfos.h netbsd.h netbsd-elf.h vax/elf.h vax/netbsd-elf.h" _______________________________________________ Linux-Vax mailing list Linux-Vax(a)mail.pergamentum.com http://mail.pergamentum.com/mailman/listinfo/linux-vax

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[LV] [PATCH] VAX/Linux: Remove __pic__ and __PIC__ definitions
by Maciej W. Rozycki 03 Nov '09

03 Nov '09

Hello, The __PIC__ and __pic__ macros are now set in generic code and there is no need to fiddle with them in platform configuration. The change below removes the following warnings: <built-in>:0:0: warning: "__PIC__" redefined <built-in>:0:0: note: this is the location of the previous definition <built-in>:0:0: warning: "__pic__" redefined <built-in>:0:0: note: this is the location of the previous definition that were missed when porting the original change from an older version of GCC. Verified with `gcc -E -dD' built for --target=vax-linux to ensure correct behaviour. The configuration is not capable enough for regression testing yet. 2009-10-29 Maciej W. Rozycki <macro(a)linux-mips.org> * config/vax/linux.h (TARGET_OS_CPP_BUILTINS): Don't define __pic__ or __PIC__. OK to apply? Maciej gcc-4.5.0-20091029-vax-linux-pic.patch Index: gcc-4.5.0-20091029-vax-linux/gcc/config/vax/linux.h =================================================================== --- gcc-4.5.0-20091029-vax-linux.orig/gcc/config/vax/linux.h +++ gcc-4.5.0-20091029-vax-linux/gcc/config/vax/linux.h @@ -21,17 +21,7 @@ along with GCC; see the file COPYING3. #undef TARGET_VERSION #define TARGET_VERSION fprintf (stderr, " (VAX GNU/Linux with ELF)"); -#define TARGET_OS_CPP_BUILTINS() \ - do \ - { \ - LINUX_TARGET_OS_CPP_BUILTINS(); \ - if (flag_pic) \ - { \ - builtin_define ("__PIC__"); \ - builtin_define ("__pic__"); \ - } \ - } \ - while (0) +#define TARGET_OS_CPP_BUILTINS() LINUX_TARGET_OS_CPP_BUILTINS() /* We use GAS, G-float double and want new DI patterns. */ #undef TARGET_DEFAULT _______________________________________________ Linux-Vax mailing list Linux-Vax(a)mail.pergamentum.com http://mail.pergamentum.com/mailman/listinfo/linux-vax

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[LV] Mailing list archives
by Maciej W. Rozycki 29 Okt '09

29 Okt '09

Hello folks, A mailing list without an archive is less than useful. As some of you may have noticed such is our mailing list. The archive page at http://mail.pergamentum.com/pipermail/linux-vax/ (referred to from the list home page at http://mail.pergamentum.com/mailman/listinfo/linux-vax) is broken. I notified the list admin back in May, got an ack, pinged him once or twice again, got no further response and the archive is still broken. As it is I believe the list can be treated as abandoned and I think it would be reasonable to move the list to a place that is attended at least a little bit. And with a working archive, of course. :) I have one possibility in mind, that is the linux-mips.org site -- I think I should ba able to arrange hosting there and we do have a decent archive (and spam filters) there. Another possibility could be kernel.org (Jan-Benedict, what do you think?), though they only seem to rely on external archives and the admins can be harsh at times. ;) While doing this I think we should gather all the archives in one place -- the old ones at montana.edu are still in place and hopefully the site admin will send us a copy in a reasonable format. The missing ones from pergamentum.com I could recreate from my personal e-mail archive; I hope no message has been dropped as I had occasional delivery problems. Comments? Maciej _______________________________________________ Linux-Vax mailing list Linux-Vax(a)mail.pergamentum.com http://mail.pergamentum.com/mailman/listinfo/linux-vax

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[LV] [PATCH] Permit variadic syscalls
by Maciej W. Rozycki 29 Okt '09

29 Okt '09

A few Linux syscalls have variadic arguments. These include open(2) that accepts either two or three arguments and reboot(2) that takes either three or four. Make the debug argument-count verification code accept variadic syscalls with a dedicated count check as special cases. Signed-off-by: Maciej W. Rozycki <macro(a)linux-mips.org> --- Jan-Benedict, I gather you have not yet applied the original open(2) patch this one builds upon: Message-ID: <alpine.LFD.1.10.0905172337160.14684(a)ftp.linux-mips.org> Date: Mon, 18 May 2009 00:57:01 +0100 (BST) From: Maciej W. Rozycki <macro(a)linux-mips.org> To: Jan-Benedict Glaw <jbglaw(a)lug-owl.de> Cc: linux-vax(a)pergamentum.com Subject: [PATCH] Permit 2- and 3-argument calls to open(2) Please replace it with the following one. Note that glibc (up to current GIT HEAD) is particularly keen on calling reboot(2) with three arguments only. I found this one with init(8). There might be more such syscalls still undiscovered. Please apply. Maciej patch-mips-2.6.25-20080422-vax-scall-varargs-0 Index: linux-mips-2.6.18-20060920-cougar/arch/vax/kernel/syscall.c =================================================================== --- linux-mips-2.6.18-20060920-cougar.orig/arch/vax/kernel/syscall.c +++ linux-mips-2.6.18-20060920-cougar/arch/vax/kernel/syscall.c @@ -58,7 +58,7 @@ extern asmlinkage long sys_rt_sigaction( static struct { unsigned long *sc_func; - unsigned int nr_args; + int nr_args; } syscall[] = { #define SC(num, func, args) \ [num] = { \ @@ -69,7 +69,7 @@ static struct { SC (__NR_fork, sys_fork, 0), SC (__NR_read, sys_read, 3), SC (__NR_write, sys_write, 3), - SC (__NR_open, sys_open, 3), + SC (__NR_open, sys_open, -1), SC (__NR_close, sys_close, 1), SC (__NR_waitpid, sys_waitpid, 3), SC (__NR_creat, sys_creat, 2), @@ -140,7 +140,7 @@ static struct { SC (__NR_readlink, sys_readlink, 3), SC (__NR_uselib, sys_uselib, 1), SC (__NR_swapon, sys_swapon, 2), - SC (__NR_reboot, sys_reboot, 4), + SC (__NR_reboot, sys_reboot, -1), SC (__NR_mmap, sys_mmap, 6), SC (__NR_munmap, sys_munmap, 2), SC (__NR_truncate, sys_truncate, 2), @@ -287,7 +287,8 @@ void syscall_handler(struct pt_regs *reg { unsigned int sc_number; unsigned int *user_ap; - unsigned int nr_args; + int sc_args; + int nr_args; sc_number = *(unsigned int *)(excep_info); @@ -347,17 +348,33 @@ void syscall_handler(struct pt_regs *reg /* * Check number of syscall arguments */ - if (unlikely (syscall[sc_number].nr_args != nr_args)) { - printk (KERN_DEBUG "%s(%d): stack mismatch (should=%d, caller=%d) on syscall %d\n", + sc_args = syscall[sc_number].nr_args; + if (unlikely(sc_args != nr_args)) + switch (sc_args) { + case -1: + /* Variadic syscalls: */ + + /* open(2) takes two or three args. */ + if (sc_number == __NR_open && !((nr_args - 2) & ~1)) + break; + + /* reboot(2) takes three or four args. */ + if (sc_number == __NR_reboot && !((nr_args - 3) & ~1)) + break; + + /* Fall through. */ + default: + printk(KERN_DEBUG "%s(%d): stack mismatch " + "(should=%d, caller=%d) on syscall %d\n", current->comm, current->pid, - syscall[sc_number].nr_args, nr_args, sc_number); - printk (KERN_DEBUG "Please report to " + sc_args, nr_args, sc_number); + printk(KERN_DEBUG "Please report to " "<linux-vax(a)pergamentum.com>.\n"); #ifdef CONFIG_DEBUG_VAX_CHECK_CHMx_ARGS_ABORT - regs->r0 = -EFAULT; - return; + regs->r0 = -EFAULT; + return; #endif /* CONFIG_DEBUG_VAX_CHECK_CHMx_ARGS_ABORT */ - } + } #endif /* CONFIG_DEBUG_VAX_CHECK_CHMx_ARGS */ /* _______________________________________________ Linux-Vax mailing list Linux-Vax(a)mail.pergamentum.com http://mail.pergamentum.com/mailman/listinfo/linux-vax

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[LV] [PATCH] Wire up POSIX message queue calls
by Maciej W. Rozycki 24 Okt '09

24 Okt '09

Wire up POSIX message queue calls. Needed by librt. Signed-off-by: Maciej W. Rozycki <macro(a)linux-mips.org> --- Hi, This patch should be obvious, please apply. Maciej patch-mips-2.6.25-20080422-vax-posix-mq-0 Index: linux-mips-2.6.18-20060920-cougar/arch/vax/kernel/syscall.c =================================================================== --- linux-mips-2.6.18-20060920-cougar.orig/arch/vax/kernel/syscall.c +++ linux-mips-2.6.18-20060920-cougar/arch/vax/kernel/syscall.c @@ -289,6 +289,12 @@ static struct { SC (__NR_clock_gettime, sys_clock_gettime, 2), SC (__NR_clock_getres, sys_clock_getres, 2), SC (__NR_clock_nanosleep, sys_clock_nanosleep, 4), + SC (__NR_mq_open, sys_mq_open, 4), + SC (__NR_mq_unlink, sys_mq_unlink, 1), + SC (__NR_mq_timedsend, sys_mq_timedsend, 5), + SC (__NR_mq_timedreceive, sys_mq_timedreceive, 5), + SC (__NR_mq_notify, sys_mq_notify, 2), + SC (__NR_mq_getsetattr, sys_mq_getsetattr, 3) #undef SC }; Index: linux-mips-2.6.18-20060920-cougar/include/asm-vax/unistd.h =================================================================== --- linux-mips-2.6.18-20060920-cougar.orig/include/asm-vax/unistd.h +++ linux-mips-2.6.18-20060920-cougar/include/asm-vax/unistd.h @@ -274,8 +274,14 @@ #define __NR_clock_gettime 250 #define __NR_clock_getres 251 #define __NR_clock_nanosleep 252 +#define __NR_mq_open 253 +#define __NR_mq_unlink 254 +#define __NR_mq_timedsend 255 +#define __NR_mq_timedreceive 256 +#define __NR_mq_notify 257 +#define __NR_mq_getsetattr 258 -#define __NR_last_syscall 252 /* Number of last syscall */ +#define __NR_last_syscall 258 /* Number of last syscall */ _______________________________________________ Linux-Vax mailing list Linux-Vax(a)mail.pergamentum.com http://mail.pergamentum.com/mailman/listinfo/linux-vax

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[LV] [PATCH] Wire up POSIX clock and timer calls
by Maciej W. Rozycki 24 Okt '09

24 Okt '09

Wire up POSIX clock and timer calls. Needed by librt. Signed-off-by: Maciej W. Rozycki <macro(a)linux-mips.org> --- Hi, This patch should be obvious, please apply. Maciej patch-mips-2.6.25-20080422-vax-posix-clock-timer-1 Index: linux-mips-2.6.18-20060920-cougar/arch/vax/kernel/syscall.c =================================================================== --- linux-mips-2.6.18-20060920-cougar.orig/arch/vax/kernel/syscall.c +++ linux-mips-2.6.18-20060920-cougar/arch/vax/kernel/syscall.c @@ -280,6 +280,15 @@ static struct { SC (__NR_shutdown, sys_shutdown, 2), SC (__NR_socket, sys_socket, 3), SC (__NR_socketpair, sys_socketpair, 4), + SC (__NR_timer_create, sys_timer_create, 3), + SC (__NR_timer_settime, sys_timer_settime, 4), + SC (__NR_timer_gettime, sys_timer_gettime, 2), + SC (__NR_timer_getoverrun, sys_timer_getoverrun, 1), + SC (__NR_timer_delete, sys_timer_delete, 1), + SC (__NR_clock_settime, sys_clock_settime, 2), + SC (__NR_clock_gettime, sys_clock_gettime, 2), + SC (__NR_clock_getres, sys_clock_getres, 2), + SC (__NR_clock_nanosleep, sys_clock_nanosleep, 4), #undef SC }; Index: linux-mips-2.6.18-20060920-cougar/include/asm-vax/unistd.h =================================================================== --- linux-mips-2.6.18-20060920-cougar.orig/include/asm-vax/unistd.h +++ linux-mips-2.6.18-20060920-cougar/include/asm-vax/unistd.h @@ -265,8 +265,17 @@ #define __NR_shutdown 241 #define __NR_socket 242 #define __NR_socketpair 243 +#define __NR_timer_create 244 +#define __NR_timer_settime 245 +#define __NR_timer_gettime 246 +#define __NR_timer_getoverrun 247 +#define __NR_timer_delete 248 +#define __NR_clock_settime 249 +#define __NR_clock_gettime 250 +#define __NR_clock_getres 251 +#define __NR_clock_nanosleep 252 -#define __NR_last_syscall 243 /* Number of last syscall */ +#define __NR_last_syscall 252 /* Number of last syscall */ _______________________________________________ Linux-Vax mailing list Linux-Vax(a)mail.pergamentum.com http://mail.pergamentum.com/mailman/listinfo/linux-vax

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[LV] New GCC 4.1.2 packages available, fixing a critical bug
by Maciej W. Rozycki 20 Okt '09

20 Okt '09

Hello folks, I have uploaded a new source and a new binary GCC package to: ftp://ftp.linux-mips.org/pub/linux/mips/people/macro/SRPMS/ and ftp://ftp.linux-mips.org/pub/linux/mips/people/macro/RPMS/ respectively. The packages to download are: vax-linux-boot-gcc-4.1.2-20.src.rpm i386/vax-linux-boot-gcc-4.1.2-20.i386.rpm The packages fix a critical bug in the compiler where the combiner would incorrectly attempt to simplify a masking operation applied to a result of a floating-point operation, resulting in an internal compiler error. An example code triggering this looks like: float foo = 1.0; short frob(void) { union { float f; short i[2]; } bar = { .f = 2.0, }; bar.f -= foo; return bar.i[0]; } or in RTL-speak: (and:SI (subreg:SI (minus:SF (reg:SF 61) (mem/s/u:SF (reg/f:SI 60) [2 foo S4 A32])) 0) (const_int 65535 [0xffff])) and the combiner would have thought the operation could be optimised by performing the floating-point addition on the lowest order 16 bits of the operands only, which is obviously not true. I've seen it happen with the -fPIC option only. This bug has only been recently been fixed in upstream GCC 4.5, so anyone using either an older version of my package or an outdated version of GCC 4.5 HEAD, please upgrade. Maciej _______________________________________________ Linux-Vax mailing list Linux-Vax(a)mail.pergamentum.com http://mail.pergamentum.com/mailman/listinfo/linux-vax

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