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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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9c355917fc
Currently sys_mmap() and sys_mmap2() (32-bit only), are not visible to the syscall tracing machinery. This means users are not able to see the execution of mmap() syscalls using the syscall tracer. Fix that by using SYSCALL_DEFINE6 for sys_mmap() and sys_mmap2() so that the meta-data associated with these syscalls is visible to the syscall tracer. A side-effect of this change is that the return type has changed from unsigned long to long. However this should have no effect, the only code in the kernel which uses the result of these syscalls is in the syscall return path, which is written in asm and treats the result as unsigned regardless. Example output: cat-3399 [001] .... 196.542410: sys_mmap(addr: 7fff922a0000, len: 20000, prot: 3, flags: 812, fd: 3, offset: 1b0000) cat-3399 [001] .... 196.542443: sys_mmap -> 0x7fff922a0000 cat-3399 [001] .... 196.542668: sys_munmap(addr: 7fff922c0000, len: 6d2c) cat-3399 [001] .... 196.542677: sys_munmap -> 0x0 Signed-off-by: Balbir Singh <bsingharora@gmail.com> [mpe: Massage change log, add detail on return type change] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
22 lines
645 B
C
22 lines
645 B
C
#ifndef __ASM_POWERPC_SYSCALLS_H
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#define __ASM_POWERPC_SYSCALLS_H
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#ifdef __KERNEL__
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#include <linux/compiler.h>
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#include <linux/linkage.h>
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#include <linux/types.h>
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struct rtas_args;
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asmlinkage long sys_mmap(unsigned long addr, size_t len,
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unsigned long prot, unsigned long flags,
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unsigned long fd, off_t offset);
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asmlinkage long sys_mmap2(unsigned long addr, size_t 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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asmlinkage long ppc64_personality(unsigned long personality);
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asmlinkage int ppc_rtas(struct rtas_args __user *uargs);
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#endif /* __KERNEL__ */
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#endif /* __ASM_POWERPC_SYSCALLS_H */
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