cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

ucontext.h (2199B)

      1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
      2#ifndef __MIPS_UAPI_ASM_UCONTEXT_H
      3#define __MIPS_UAPI_ASM_UCONTEXT_H
      4
      5/**
      6 * struct extcontext - extended context header structure
      7 * @magic:	magic value identifying the type of extended context
      8 * @size:	the size in bytes of the enclosing structure
      9 *
     10 * Extended context structures provide context which does not fit within struct
     11 * sigcontext. They are placed sequentially in memory at the end of struct
     12 * ucontext and struct sigframe, with each extended context structure beginning
     13 * with a header defined by this struct. The type of context represented is
     14 * indicated by the magic field. Userland may check each extended context
     15 * structure against magic values that it recognises. The size field allows any
     16 * unrecognised context to be skipped, allowing for future expansion. The end
     17 * of the extended context data is indicated by the magic value
     18 * END_EXTCONTEXT_MAGIC.
     19 */
     20struct extcontext {
     21	unsigned int		magic;
     22	unsigned int		size;
     23};
     24
     25/**
     26 * struct msa_extcontext - MSA extended context structure
     27 * @ext:	the extended context header, with magic == MSA_EXTCONTEXT_MAGIC
     28 * @wr:		the most significant 64 bits of each MSA vector register
     29 * @csr:	the value of the MSA control & status register
     30 *
     31 * If MSA context is live for a task at the time a signal is delivered to it,
     32 * this structure will hold the MSA context of the task as it was prior to the
     33 * signal delivery.
     34 */
     35struct msa_extcontext {
     36	struct extcontext	ext;
     37#define MSA_EXTCONTEXT_MAGIC	0x784d5341	/* xMSA */
     38
     39	unsigned long long	wr[32];
     40	unsigned int		csr;
     41};
     42
     43#define END_EXTCONTEXT_MAGIC	0x78454e44	/* xEND */
     44
     45/**
     46 * struct ucontext - user context structure
     47 * @uc_flags:
     48 * @uc_link:
     49 * @uc_stack:
     50 * @uc_mcontext:	holds basic processor state
     51 * @uc_sigmask:
     52 * @uc_extcontext:	holds extended processor state
     53 */
     54struct ucontext {
     55	/* Historic fields matching asm-generic */
     56	unsigned long		uc_flags;
     57	struct ucontext		*uc_link;
     58	stack_t			uc_stack;
     59	struct sigcontext	uc_mcontext;
     60	sigset_t		uc_sigmask;
     61
     62	/* Extended context structures may follow ucontext */
     63	unsigned long long	uc_extcontext[0];
     64};
     65
     66#endif /* __MIPS_UAPI_ASM_UCONTEXT_H */