- 06 Mar, 2014 12 commits
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Heiko Carstens authored
In order to allow the COMPAT_SYSCALL_DEFINE macro generate code that performs proper zero and sign extension convert all 64 bit parameters to their corresponding 32 bit compat counterparts. Signed-off-by:Heiko Carstens <heiko.carstens@de.ibm.com>
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Heiko Carstens authored
In order to allow the COMPAT_SYSCALL_DEFINE macro generate code that performs proper zero and sign extension convert all 64 bit parameters to their corresponding 32 bit compat counterparts. Signed-off-by: -
Heiko Carstens authored
In order to allow the COMPAT_SYSCALL_DEFINE macro generate code that performs proper zero and sign extension convert all 64 bit parameters to their corresponding 32 bit compat counterparts. Signed-off-by: -
Heiko Carstens authored
Some fs compat system calls have unsigned long parameters instead of compat_ulong_t. In order to allow the COMPAT_SYSCALL_DEFINE macro generate code that performs proper zero and sign extension convert all 64 bit parameters their corresponding 32 bit counterparts. compat_sys_io_getevents() is a bit different: the non-compat version has signed parameters for the "min_nr" and "nr" parameters while the compat version has unsigned parameters. So change this as well. For all practical purposes this shouldn't make any difference (doesn't fix a real bug). Also introduce a generic compat_aio_context_t type which can be used everywhere. The access_ok() check within compat_sys_io_getevents() got also removed since the non-compat sys_io_getevents() should be able to handle everything anyway. Signed-off-by: -
Heiko Carstens authored
Convert all compat system call functions where all parameter types have a size of four or less than four bytes, or are pointer types to COMPAT_SYSCALL_DEFINE. The implicit casts within COMPAT_SYSCALL_DEFINE will perform proper zero and sign extension to 64 bit of all parameters if needed. Signed-off-by: -
Heiko Carstens authored
Convert all compat system call functions where all parameter types have a size of four or less than four bytes, or are pointer types to COMPAT_SYSCALL_DEFINE. The implicit casts within COMPAT_SYSCALL_DEFINE will perform proper zero and sign extension to 64 bit of all parameters if needed. Signed-off-by: -
Heiko Carstens authored
Convert all compat system call functions where all parameter types have a size of four or less than four bytes, or are pointer types to COMPAT_SYSCALL_DEFINE. The implicit casts within COMPAT_SYSCALL_DEFINE will perform proper zero and sign extension to 64 bit of all parameters if needed. Signed-off-by: -
Heiko Carstens authored
Convert all compat system call functions where all parameter types have a size of four or less than four bytes, or are pointer types to COMPAT_SYSCALL_DEFINE. The implicit casts within COMPAT_SYSCALL_DEFINE will perform proper zero and sign extension to 64 bit of all parameters if needed. Signed-off-by: -
Heiko Carstens authored
Convert all compat system call functions where all parameter types have a size of four or less than four bytes, or are pointer types to COMPAT_SYSCALL_DEFINE. The implicit casts within COMPAT_SYSCALL_DEFINE will perform proper zero and sign extension to 64 bit of all parameters if needed. Signed-off-by: -
Heiko Carstens authored
Convert all compat system call functions where all parameter types have a size of four or less than four bytes, or are pointer types to COMPAT_SYSCALL_DEFINE. The implicit casts within COMPAT_SYSCALL_DEFINE will perform proper zero and sign extension to 64 bit of all parameters if needed. Signed-off-by: -
Heiko Carstens authored
The preadv64/pwrite64 have been implemented for the x32 ABI, in order to allow passing 64 bit arguments from user space without splitting them into two 32 bit parameters, like it would be necessary for usual compat tasks. Howevert these two system calls are only being used for the x32 ABI, so add __ARCH_WANT_COMPAT defines for these two compat syscalls and make these two only visible for x86. Signed-off-by: -
Heiko Carstens authored
Change the type of compat_sys_msgrcv's msgtyp parameter from long to compat_long_t, since compat user space passes only a 32 bit signed value. Let the compat wrapper do proper sign extension to 64 bit of this parameter. Signed-off-by:
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- 04 Mar, 2014 27 commits
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Heiko Carstens authored
Parameter conversion within the system call wrappers is only needed for parameters which differ in size and have a size of eight bytes on 64 bit. For system call parameters with a size of less than eight byte the called system call itself will perform parameter conversion anyway. So we can save the double conversion of e.g. int parameters. The only types which need to be converted are therefore pointer and (unsigned) long parameters. Signed-off-by: -
Heiko Carstens authored
Instead of explicitly changing compat system call parameters from e.g. unsigned long to compat_ulong_t let the COMPAT_SYSCALL_WRAP macros automatically detect (unsigned) long parameters and zero and sign extend them automatically. The resulting binary is completely identical. In addition add a sys_[system call name] prototype for each system call wrapper. This will cause compile errors if the prototype does not match the prototype in include/linux/syscall.h. Therefore we should now always get the correct zero and sign extension of system call parameters. Pointers are handled like before. Signed-off-by: -
Heiko Carstens authored
The compat syscall wrappers for sync_file_range and fallocate merged 32 bit parameters into 64 bit parameters. Therefore they did more than just the usual zero and/or sign extension of system call parameters. So convert these two wrappers to full s390 specific compat sytem calls. Signed-off-by: -
Heiko Carstens authored
Signed-off-by: -
Heiko Carstens authored
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Heiko Carstens authored
Signed-off-by: -
Heiko Carstens authored
Signed-off-by: -
Heiko Carstens authored
Signed-off-by: -
Heiko Carstens authored
Signed-off-by: -
Heiko Carstens authored
Signed-off-by: -
Heiko Carstens authored
Signed-off-by: -
Heiko Carstens authored
Signed-off-by: -
Heiko Carstens authored
Signed-off-by: -
Heiko Carstens authored
Signed-off-by: -
Heiko Carstens authored
Signed-off-by: -
Heiko Carstens authored
Signed-off-by: -
Heiko Carstens authored
Signed-off-by: -
Heiko Carstens authored
Introduce a new compat_wrap.c file which contains the s390 specific compat system call wrappers. The s390 specific system call wrappers only perform sign, zero and pointer conversion of system call arguments before actually calling the non-compat system call. Therefore introduce COMPAT_SYSCALL_WRAPx macros which generate C code that is nearly identical to the assembly code. This has the advantage that the compile will generate correct code, and we avoid the frequent copy-paste errors seen in the compat_wrapper.S file. Signed-off-by: -
Heiko Carstens authored
Signed-off-by: -
Heiko Carstens authored
Signed-off-by: -
Heiko Carstens authored
Signed-off-by: -
Heiko Carstens authored
Signed-off-by: -
Heiko Carstens authored
Signed-off-by: -
Heiko Carstens authored
Signed-off-by: -
Heiko Carstens authored
Convert s390 specific system calls to to the new COMPAT_SYSCALL_DEFINE macro. This allows us to get rid of the assembly compat wrappers. Signed-off-by: -
Heiko Carstens authored
For consistency reason add a COMPAT_SYSCALL_DEFINE0 macro. This macro should be used for compat system calls with zero parameters. Signed-off-by: -
Heiko Carstens authored
For architecture dependent compat syscalls in common code an architecture must define something like __ARCH_WANT_<WHATEVER> if it wants to use the code. This however is not true for compat_sys_getdents64 for which architectures must define __ARCH_OMIT_COMPAT_SYS_GETDENTS64 if they do not want the code. This leads to the situation where all architectures, except mips, get the compat code but only x86_64, arm64 and the generic syscall architectures actually use it. So invert the logic, so that architectures actively must do something to get the compat code. This way a couple of architectures get rid of otherwise dead code. Signed-off-by:
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- 03 Mar, 2014 1 commit
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Linus Torvalds authored
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