FM / asm

/usr/include/x86_64-linux-gnu/asm

Name	Size	Mode	Actions
a.out.h	756	0644	edit dl rm
auxvec.h	546	0644	edit dl rm
bitsperlong.h	321	0644	edit dl rm
boot.h	323	0644	edit dl rm
bootparam.h	8237	0644	edit dl rm
bpf_perf_event.h	40	0644	edit dl rm
byteorder.h	200	0644	edit dl rm
debugreg.h	3329	0644	edit dl rm
e820.h	2579	0644	edit dl rm
errno.h	31	0644	edit dl rm
fcntl.h	31	0644	edit dl rm
hwcap2.h	324	0644	edit dl rm
hw_breakpoint.h	69	0644	edit dl rm
ioctl.h	31	0644	edit dl rm
ioctls.h	32	0644	edit dl rm
ipcbuf.h	32	0644	edit dl rm
ist.h	854	0644	edit dl rm
kvm.h	10858	0644	edit dl rm
kvm_para.h	4300	0644	edit dl rm
kvm_perf.h	388	0644	edit dl rm
ldt.h	1306	0644	edit dl rm
mce.h	1730	0644	edit dl rm
mman.h	1002	0644	edit dl rm
msgbuf.h	1079	0644	edit dl rm
msr.h	346	0644	edit dl rm
mtrr.h	4225	0644	edit dl rm
param.h	31	0644	edit dl rm
perf_regs.h	1403	0644	edit dl rm
poll.h	30	0644	edit dl rm
posix_types.h	224	0644	edit dl rm
posix_types_32.h	765	0644	edit dl rm
posix_types_64.h	609	0644	edit dl rm
posix_types_x32.h	581	0644	edit dl rm
prctl.h	524	0644	edit dl rm
processor-flags.h	6623	0644	edit dl rm
ptrace-abi.h	2037	0644	edit dl rm
ptrace.h	1495	0644	edit dl rm
resource.h	34	0644	edit dl rm
sembuf.h	1070	0644	edit dl rm
setup.h	6	0644	edit dl rm
sgx.h	5920	0644	edit dl rm
shmbuf.h	1258	0644	edit dl rm
sigcontext.h	9723	0644	edit dl rm
sigcontext32.h	271	0644	edit dl rm
siginfo.h	422	0644	edit dl rm
signal.h	2061	0644	edit dl rm
socket.h	32	0644	edit dl rm
sockios.h	33	0644	edit dl rm
stat.h	3131	0644	edit dl rm
statfs.h	416	0644	edit dl rm
svm.h	8902	0644	edit dl rm
swab.h	724	0644	edit dl rm
termbits.h	34	0644	edit dl rm
termios.h	33	0644	edit dl rm
types.h	31	0644	edit dl rm
ucontext.h	2117	0644	edit dl rm
unistd.h	623	0644	edit dl rm
unistd_32.h	11876	0644	edit dl rm
unistd_64.h	9687	0644	edit dl rm
unistd_x32.h	17054	0644	edit dl rm
vm86.h	3186	0644	edit dl rm
vmx.h	7368	0644	edit dl rm
vsyscall.h	263	0644	edit dl rm

Edit: /usr/include/x86_64-linux-gnu/asm/ldt.h (1306B)

/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
 * ldt.h
 *
 * Definitions of structures used with the modify_ldt system call.
 */
#ifndef _ASM_X86_LDT_H
#define _ASM_X86_LDT_H

/* Maximum number of LDT entries supported. */
#define LDT_ENTRIES	8192
/* The size of each LDT entry. */
#define LDT_ENTRY_SIZE	8

#ifndef __ASSEMBLY__
/*
 * Note on 64bit base and limit is ignored and you cannot set DS/ES/CS
 * not to the default values if you still want to do syscalls. This
 * call is more for 32bit mode therefore.
 */
struct user_desc {
	unsigned int  entry_number;
	unsigned int  base_addr;
	unsigned int  limit;
	unsigned int  seg_32bit:1;
	unsigned int  contents:2;
	unsigned int  read_exec_only:1;
	unsigned int  limit_in_pages:1;
	unsigned int  seg_not_present:1;
	unsigned int  useable:1;
#ifdef __x86_64__
	/*
	 * Because this bit is not present in 32-bit user code, user
	 * programs can pass uninitialized values here.  Therefore, in
	 * any context in which a user_desc comes from a 32-bit program,
	 * the kernel must act as though lm == 0, regardless of the
	 * actual value.
	 */
	unsigned int  lm:1;
#endif
};

#define MODIFY_LDT_CONTENTS_DATA	0
#define MODIFY_LDT_CONTENTS_STACK	1
#define MODIFY_LDT_CONTENTS_CODE	2

#endif /* !__ASSEMBLY__ */
#endif /* _ASM_X86_LDT_H */

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