diff options
Diffstat (limited to 'arch/mips/include')
| -rw-r--r-- | arch/mips/include/asm/Kbuild | 1 | ||||
| -rw-r--r-- | arch/mips/include/uapi/asm/sigcontext.h | 3 | ||||
| -rw-r--r-- | arch/mips/include/uapi/asm/ucontext.h | 65 |
3 files changed, 68 insertions, 1 deletions
diff --git a/arch/mips/include/asm/Kbuild b/arch/mips/include/asm/Kbuild index 1f8546081d20..40ec4ca3f946 100644 --- a/arch/mips/include/asm/Kbuild +++ b/arch/mips/include/asm/Kbuild @@ -16,6 +16,5 @@ generic-y += sections.h generic-y += segment.h generic-y += serial.h generic-y += trace_clock.h -generic-y += ucontext.h generic-y += user.h generic-y += xor.h diff --git a/arch/mips/include/uapi/asm/sigcontext.h b/arch/mips/include/uapi/asm/sigcontext.h index 28f51bb47046..5cbd9ae6421f 100644 --- a/arch/mips/include/uapi/asm/sigcontext.h +++ b/arch/mips/include/uapi/asm/sigcontext.h @@ -21,6 +21,9 @@ /* FR=1, but with odd singles in bits 63:32 of preceding even double */ #define USED_HYBRID_FPRS (1 << 2) +/* extended context was used, see struct extcontext for details */ +#define USED_EXTCONTEXT (1 << 3) + #if _MIPS_SIM == _MIPS_SIM_ABI32 /* diff --git a/arch/mips/include/uapi/asm/ucontext.h b/arch/mips/include/uapi/asm/ucontext.h new file mode 100644 index 000000000000..2320144ce858 --- /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 */ |