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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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b07edab23c
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 <heiko.carstens@de.ibm.com>
36 lines
1.6 KiB
C
36 lines
1.6 KiB
C
#include <linux/syscalls.h>
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#include <linux/compat.h>
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#define COMPAT_SYSCALL_WRAP1(name, ...) \
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COMPAT_SYSCALL_WRAPx(1, _##name, __VA_ARGS__)
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#define COMPAT_SYSCALL_WRAP2(name, ...) \
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COMPAT_SYSCALL_WRAPx(2, _##name, __VA_ARGS__)
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#define COMPAT_SYSCALL_WRAP3(name, ...) \
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COMPAT_SYSCALL_WRAPx(3, _##name, __VA_ARGS__)
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#define COMPAT_SYSCALL_WRAP4(name, ...) \
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COMPAT_SYSCALL_WRAPx(4, _##name, __VA_ARGS__)
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#define COMPAT_SYSCALL_WRAP5(name, ...) \
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COMPAT_SYSCALL_WRAPx(5, _##name, __VA_ARGS__)
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#define COMPAT_SYSCALL_WRAP6(name, ...) \
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COMPAT_SYSCALL_WRAPx(6, _##name, __VA_ARGS__)
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#define COMPAT_SYSCALL_WRAPx(x, name, ...) \
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asmlinkage long compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \
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asmlinkage long compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
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{ \
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return sys##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__)); \
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}
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COMPAT_SYSCALL_WRAP1(exit, int, error_code);
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COMPAT_SYSCALL_WRAP1(close, unsigned int, fd);
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COMPAT_SYSCALL_WRAP2(creat, const char __user *, pathname, umode_t, mode);
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COMPAT_SYSCALL_WRAP2(link, const char __user *, oldname, const char __user *, newname);
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COMPAT_SYSCALL_WRAP1(unlink, const char __user *, pathname);
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COMPAT_SYSCALL_WRAP1(chdir, const char __user *, filename);
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COMPAT_SYSCALL_WRAP3(mknod, const char __user *, filename, umode_t, mode, unsigned, dev);
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COMPAT_SYSCALL_WRAP2(chmod, const char __user *, filename, umode_t, mode);
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COMPAT_SYSCALL_WRAP1(oldumount, char __user *, name);
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COMPAT_SYSCALL_WRAP1(alarm, unsigned int, seconds);
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COMPAT_SYSCALL_WRAP2(access, const char __user *, filename, int, mode);
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COMPAT_SYSCALL_WRAP1(nice, int, increment);
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