From 8d91c1e411f55d7ea91b1183a2e9f8088fb4d5be Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Tue, 15 Dec 2015 14:52:16 -0300 Subject: Linux-libre 4.3.2-gnu --- arch/mips/include/uapi/asm/ucontext.h | 65 +++++++++++++++++++++++++++++++++++ 1 file changed, 65 insertions(+) create mode 100644 arch/mips/include/uapi/asm/ucontext.h (limited to 'arch/mips/include/uapi/asm/ucontext.h') diff --git a/arch/mips/include/uapi/asm/ucontext.h b/arch/mips/include/uapi/asm/ucontext.h new file mode 100644 index 000000000..2320144ce --- /dev/null +++ b/arch/mips/include/uapi/asm/ucontext.h @@ -0,0 +1,65 @@ +#ifndef __MIPS_UAPI_ASM_UCONTEXT_H +#define __MIPS_UAPI_ASM_UCONTEXT_H + +/** + * struct extcontext - extended context header structure + * @magic: magic value identifying the type of extended context + * @size: the size in bytes of the enclosing structure + * + * Extended context structures provide context which does not fit within struct + * sigcontext. They are placed sequentially in memory at the end of struct + * ucontext and struct sigframe, with each extended context structure beginning + * with a header defined by this struct. The type of context represented is + * indicated by the magic field. Userland may check each extended context + * structure against magic values that it recognises. The size field allows any + * unrecognised context to be skipped, allowing for future expansion. The end + * of the extended context data is indicated by the magic value + * END_EXTCONTEXT_MAGIC. + */ +struct extcontext { + unsigned int magic; + unsigned int size; +}; + +/** + * struct msa_extcontext - MSA extended context structure + * @ext: the extended context header, with magic == MSA_EXTCONTEXT_MAGIC + * @wr: the most significant 64 bits of each MSA vector register + * @csr: the value of the MSA control & status register + * + * If MSA context is live for a task at the time a signal is delivered to it, + * this structure will hold the MSA context of the task as it was prior to the + * signal delivery. + */ +struct msa_extcontext { + struct extcontext ext; +#define MSA_EXTCONTEXT_MAGIC 0x784d5341 /* xMSA */ + + unsigned long long wr[32]; + unsigned int csr; +}; + +#define END_EXTCONTEXT_MAGIC 0x78454e44 /* xEND */ + +/** + * struct ucontext - user context structure + * @uc_flags: + * @uc_link: + * @uc_stack: + * @uc_mcontext: holds basic processor state + * @uc_sigmask: + * @uc_extcontext: holds extended processor state + */ +struct ucontext { + /* Historic fields matching asm-generic */ + unsigned long uc_flags; + struct ucontext *uc_link; + stack_t uc_stack; + struct sigcontext uc_mcontext; + sigset_t uc_sigmask; + + /* Extended context structures may follow ucontext */ + unsigned long long uc_extcontext[0]; +}; + +#endif /* __MIPS_UAPI_ASM_UCONTEXT_H */ -- cgit v1.2.3-54-g00ecf