uapi/asm/sigcontext.h

1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
25  * Signal context structure - contains all info to do with the state
53  * New records that can exceed this space need to be opt-in for userspace, so
63  * and be 16-byte aligned. The last structure must be a dummy one with the
85  * Note: similarly to all other integer fields, each V-register is stored in an
86  * endianness-dependent format, with the byte at offset i from the start of the
87  * in-memory representation of the register value containing
89  *    bits [(7 + 8 * i) : (8 * i)] of the register on little-endian hosts; or
90  *    bits [(127 - 8 * i) : (120 - 8 * i)] on big-endian hosts.
119  * 16-byte aligned address immediately after the terminating null
131 	__u64 datap; /* 16-byte aligned pointer to extra space cast to __u64 */
199  * If the SVE registers are currently live for the thread at signal delivery,
206  * the SVE registers were not live for the thread and no register data
212  * make the SVE registers live when they were previously non-live or
213  * vice-versa.  This may require the caller to allocate fresh
221  * streaming or non-streaming mode.  In streaming mode the streaming mode
242  *	-	----				-----------
245  *	ZREGS	__uint128_t[SVE_NUM_ZREGS][vq]	all Z-registers
246  *	ZREG	__uint128_t[vq]			individual Z-register Zn
248  *	PREGS	uint16_t[SVE_NUM_PREGS][vq]	all P-registers
249  *	PREG	uint16_t[vq]			individual P-register Pn
251  *	FFR	uint16_t[vq]			first-fault status register
255  * Unlike vregs[] in fpsimd_context, each SVE scalable register (Z-, P- or FFR)
256  * is encoded in memory in an endianness-invariant format, with the byte at
257  * offset i from the start of the in-memory representation containing bits
266 	((sizeof(struct sve_context) + (__SVE_VQ_BYTES - 1))	\
302  * enable the ZA register when it was previously non-live or vice-versa.
312 	((sizeof(struct za_context) + (__SVE_VQ_BYTES - 1))	\