| Quellcodebibliothek Statistik Leitseite products/Sources/formale Sprachen/C/Linux/arch/x86/include/asm/ (Linux Kernel Version 6.17.9©) Datei vom 24.10.2025 mit Größe 2 kB |
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Quelle user.h Sprache: C |
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/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_X86_USER_H #define _ASM_X86_USER_H #ifdef CONFIG_X86_32 # include <asm/user_32.h> #else # include <asm/user_64.h> #endif #include <asm/types.h> struct user_ymmh_regs { /* 16 * 16 bytes for each YMMH-reg */ __u32 ymmh_space[64]; }; struct user_xstate_header { __u64 xfeatures; __u64 reserved1[2]; __u64 reserved2[5]; }; /* * The structure layout of user_xstateregs, used for exporting the * extended register state through ptrace and core-dump (NT_X86_XSTATE note) * interfaces will be same as the memory layout of xsave used by the processor * (except for the bytes 464..511, which can be used by the software) and hence * the size of this structure varies depending on the features supported by the * processor and OS. The size of the structure that users need to use can be * obtained by doing: * cpuid_count(0xd, 0, &eax, &ptrace_xstateregs_struct_size, &ecx, &>edx); * i.e., cpuid.(eax=0xd,ecx=0).ebx will be the size that user (debuggers, etc.) * need to use. * * For now, only the first 8 bytes of the software usable bytes[464..471] will * be used and will be set to OS enabled xstate mask (which is same as the * 64bit mask returned by the xgetbv's xCR0). Users (analyzing core dump * remotely, etc.) can use this mask as well as the mask saved in the * xstate_hdr bytes and interpret what states the processor/OS supports * and what states are in modified/initialized conditions for the * particular process/thread. * * Also when the user modifies certain state FP/SSE/etc through the * ptrace interface, they must ensure that the header.xfeatures * bytes[512..519] of the memory layout are updated correspondingly. * i.e., for example when FP state is modified to a non-init state, * header.xfeatures's bit 0 must be set to '1', when SSE is modified to * non-init state, header.xfeatures's bit 1 must to be set to '1', etc. */ #define USER_XSTATE_FX_SW_WORDS 6 #define USER_XSTATE_XCR0_WORD 0 struct user_xstateregs { struct { __u64 fpx_space[58]; __u64 xstate_fx_sw[USER_XSTATE_FX_SW_WORDS]; } i387; struct user_xstate_header header; struct user_ymmh_regs ymmh; /* further processor state extensions go here */ }; #endif /* _ASM_X86_USER_H */
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2026-10-10