linux/arch/tile/kernel/compat.c, branch v3.13

tile: remove stray blank space

2013-09-16T19:47:32Z

The compat sys_llseek() definition addition added a bogus space on an otherwise-blank line. Signed-off-by: Chris Metcalf

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal

2013-05-01T14:21:43Z

Pull compat cleanup from Al Viro: "Mostly about syscall wrappers this time; there will be another pile with patches in the same general area from various people, but I'd rather push those after both that and vfs.git pile are in." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal: syscalls.h: slightly reduce the jungles of macros get rid of union semop in sys_semctl(2) arguments make do_mremap() static sparc: no need to sign-extend in sync_file_range() wrapper ppc compat wrappers for add_key(2) and request_key(2) are pointless x86: trim sys_ia32.h x86: sys32_kill and sys32_mprotect are pointless get rid of compat_sys_semctl() and friends in case of ARCH_WANT_OLD_COMPAT_IPC merge compat sys_ipc instances consolidate compat lookup_dcookie() convert vmsplice to COMPAT_SYSCALL_DEFINE switch getrusage() to COMPAT_SYSCALL_DEFINE switch epoll_pwait to COMPAT_SYSCALL_DEFINE convert sendfile{,64} to COMPAT_SYSCALL_DEFINE switch signalfd{,4}() to COMPAT_SYSCALL_DEFINE make SYSCALL_DEFINE-generated wrappers do asmlinkage_protect make HAVE_SYSCALL_WRAPPERS unconditional consolidate cond_syscall and SYSCALL_ALIAS declarations teach SYSCALL_DEFINE how to deal with long long/unsigned long long get rid of duplicate logics in __SC_....[1-6] definitions

tile: properly use COMPAT_SYSCALL_DEFINEx

2013-03-04T18:37:32Z

This was pointed out by Al Viro. Using the correct wrappers properly does sign extension as necessary on syscall arguments. Signed-off-by: Chris Metcalf

tile: work around bug in the generic sys_llseek

2013-03-04T16:19:09Z

sys_llseek should specify the high and low 32-bit seek values as "unsigned int" but instead it specifies "unsigned long". Since compat syscall arguments are always sign-extended on tile, this means that a seek value of 0xffffffff will be incorrectly interpreted as a value of -1ULL. To avoid the risk of breaking binary compatibility on architectures that already use sys_llseek this way, we follow the same path as MIPS and provide a wrapper override. Signed-off-by: Chris Metcalf Cc: stable@kernel.org [v3.6 onwards]

consolidate compat lookup_dcookie()

2013-03-04T04:00:23Z

Signed-off-by: Al Viro

compat: generic compat_sys_sched_rr_get_interval() implementation

2012-12-18T01:15:18Z

This function is used by sparc, powerpc tile and arm64 for compat support. The patch adds a generic implementation with a wrapper for PowerPC to do the u32->int sign extension. The reason for a single patch covering powerpc, tile, sparc and arm64 is to keep it bisectable, otherwise kernel building may fail with mismatched function declarations. Signed-off-by: Catalin Marinas Acked-by: Chris Metcalf [for tile] Acked-by: David S. Miller Acked-by: Arnd Bergmann Cc: Benjamin Herrenschmidt Cc: Paul Mackerras Cc: Alexander Viro Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

take sys_fork/sys_vfork/sys_clone prototypes to linux/syscalls.h

2012-11-29T04:43:27Z

now it can be done... Signed-off-by: Al Viro

arch/tile: eliminate pt_regs trampolines for syscalls

2012-10-23T20:23:58Z

Using the new current_pt_regs() model, we can remove some trampolines from assembly code and call directly to the C syscall implementations. rt_sigreturn() and clone() still need some assembly wrapping, but no longer are passed a pt_regs pointer. sigaltstack() and the tilepro-specific cmpxchg_badaddr() syscalls are now just straight C. Signed-off-by: Chris Metcalf

Drop struct pt_regs * argument in compat_sys_execve()

2012-10-20T17:13:11Z

Signed-off-by: Al Viro

[PATCH v3] ipc: provide generic compat versions of IPC syscalls

2012-03-15T17:13:38Z

When using the "compat" APIs, architectures will generally want to be able to make direct syscalls to msgsnd(), shmctl(), etc., and in the kernel we would want them to be handled directly by compat_sys_xxx() functions, as is true for other compat syscalls. However, for historical reasons, several of the existing compat IPC syscalls do not do this. semctl() expects a pointer to the fourth argument, instead of the fourth argument itself. msgsnd(), msgrcv() and shmat() expect arguments in different order. This change adds an ARCH_WANT_OLD_COMPAT_IPC config option that can be set to preserve this behavior for ports that use it (x86, sparc, powerpc, s390, and mips). No actual semantics are changed for those architectures, and there is only a minimal amount of code refactoring in ipc/compat.c. Newer architectures like tile (and perhaps future architectures such as arm64 and unicore64) should not select this option, and thus can avoid having any IPC-specific code at all in their architecture-specific compat layer. In the same vein, if this option is not selected, IPC_64 mode is assumed, since that's what the headers expect. The workaround code in "tile" for msgsnd() and msgrcv() is removed with this change; it also fixes the bug that shmat() and semctl() were not being properly handled. Reviewed-by: Arnd Bergmann Signed-off-by: Chris Metcalf