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295f10061a
Most architectures that implement the old-style mmap() with byte offset use 'unsigned long' as the type for that offset, but microblaze and riscv have the off_t type that is shared with userspace, matching the prototype in include/asm-generic/syscalls.h. Make this consistent by using an unsigned argument everywhere. This changes the behavior slightly, as the argument is shifted to a page number, and an user input with the top bit set would result in a negative page offset rather than a large one as we use elsewhere. For riscv, the 32-bit sys_mmap2() definition actually used a custom type that is different from the global declaration, but this was missed due to an incorrect type check. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
29 lines
745 B
C
29 lines
745 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __ASM_GENERIC_SYSCALLS_H
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#define __ASM_GENERIC_SYSCALLS_H
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#include <linux/compiler.h>
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#include <linux/linkage.h>
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/*
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* Calling conventions for these system calls can differ, so
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* it's possible to override them.
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*/
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#ifndef sys_mmap2
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asmlinkage long sys_mmap2(unsigned long addr, unsigned long len,
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unsigned long prot, unsigned long flags,
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unsigned long fd, unsigned long pgoff);
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#endif
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#ifndef sys_mmap
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asmlinkage long sys_mmap(unsigned long addr, unsigned long len,
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unsigned long prot, unsigned long flags,
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unsigned long fd, unsigned long off);
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#endif
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#ifndef sys_rt_sigreturn
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asmlinkage long sys_rt_sigreturn(struct pt_regs *regs);
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#endif
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#endif /* __ASM_GENERIC_SYSCALLS_H */
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