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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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aa6758d486
Implement sys_[gs]et_thread_area and the corresponding ptrace operations for UML. This is the main chunk, additional parts follow. This implementation is now well tested and has run reliably for some time, and we've understood all the previously existing problems. Their implementation saves the new GDT content and then forwards the call to the host when appropriate, i.e. immediately when the target process is running or on context switch otherwise (i.e. on fork and on ptrace() calls). In SKAS mode, we must switch registers on each context switch (because SKAS does not switches tls_array together with current->mm). Also, added get_cpu() locking; this has been done for SKAS mode, since TT does not need it (it does not use smp_processor_id()). Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Acked-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
15 lines
370 B
ArmAsm
15 lines
370 B
ArmAsm
#include <linux/linkage.h>
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/* Steal i386 syscall table for our purposes, but with some slight changes.*/
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#define sys_iopl sys_ni_syscall
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#define sys_ioperm sys_ni_syscall
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#define sys_vm86old sys_ni_syscall
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#define sys_vm86 sys_ni_syscall
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#define sys_stime um_stime
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#define sys_time um_time
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#define old_mmap old_mmap_i386
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#include "../../i386/kernel/syscall_table.S"
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