1 /* SPDX-License-Identifier: GPL-2.0 */
3  * syscall_numbering.c - test calling the x86-64 kernel with various
33 /* x64-only system call numbers */
37 /* x32-only system call numbers (without X32_BIT) */
44 static int nullfd = -1;		/* File descriptor for /dev/null */
45 static bool with_x32;		/* x32 supported on this kernel? */
64 	[PTP_INTNUM]	= "sign-extending the syscall number",
80 	unsigned int level = sh ? sh->indent : 0;  in offset()
85 #define msg(lvl, fmt, ...) printf("%-*s" fmt, offset(), "[" #lvl "]", \
95 		sh->nerr++;				\
100 		sh->indent = 0;				\
106 /* Sentinel for ptrace-modified return value */
107 #define MODIFIED_BY_PTRACE	-9999
133 	sh->probing_syscall = true;  in probe_syscall()
140 	sh->probing_syscall = false;  in probe_syscall()
148 	const char * const type = (start & X32_BIT) ? "x32" : "x64";  in syscall_str()
152 	 * Improve readability by stripping the x32 bit, but round  in syscall_str()
153 	 * toward zero so we don't display -1 as -1073741825.  in syscall_str()
165 			 type, msb, lsb, lsb + (end-start));  in syscall_str()
175 	sh->indent++;  in _check_for()
177 		sh->indent++;  in _check_for()
191 		sh->indent--;  in _check_for()
203 	sh->indent--;  in _check_for()
218 	return check_for(msb, nr, nr, -ENOSYS);  in check_enosys()
223  * supports x32. Tell them. This can also be used to conditionalize
224  * tests based on existence or nonexistence of x32.
231 	run("Checking for x32 by calling x32 getpid()\n");  in test_x32()
234 	sh->indent++;  in test_x32()
236 		info("x32 is supported\n");  in test_x32()
238 	} else if (ret == -ENOSYS) {  in test_x32()
239 		info("x32 is not supported\n");  in test_x32()
242 …fail("x32 getpid() returned %lld, but it should have returned either %lld or -ENOSYS\n", ret, (lon…  in test_x32()
245 	sh->indent--;  in test_x32()
251 	enum ptrace_pass pass = sh->ptrace_pass;  in test_syscalls_common()
253 	run("Checking some common syscalls as 64 bit\n");  in test_syscalls_common()
257 	run("Checking some 64-bit only syscalls as 64 bit\n");  in test_syscalls_common()
262 	check_for(msb, -64, -2, -ENOSYS);  in test_syscalls_common()
264 		check_for(msb, -1, -1, MODIFIED_BY_PTRACE);  in test_syscalls_common()
266 		check_for(msb, -1, -1, -ENOSYS);  in test_syscalls_common()
267 	check_for(msb, X32_BIT-64, X32_BIT-1, -ENOSYS);  in test_syscalls_common()
268 	check_for(msb, -64-X32_BIT, -1-X32_BIT, -ENOSYS);  in test_syscalls_common()
269 	check_for(msb, INT_MAX-64, INT_MAX-1, -ENOSYS);  in test_syscalls_common()
275 	 * Syscalls 512-547 are "x32" syscalls.  They are  in test_syscalls_with_x32()
276 	 * intended to be called with the x32 (0x40000000) bit  in test_syscalls_with_x32()
277 	 * set.  Calling them without the x32 bit set is  in test_syscalls_with_x32()
280 	run("Checking x32 syscalls as 64 bit\n");  in test_syscalls_with_x32()
281 	check_for(msb, 512, 547, -ENOSYS);  in test_syscalls_with_x32()
283 	run("Checking some common syscalls as x32\n");  in test_syscalls_with_x32()
287 	run("Checking some x32 syscalls as x32\n");  in test_syscalls_with_x32()
291 	run("Checking some 64-bit syscalls as x32\n");  in test_syscalls_with_x32()
299 	run("Checking for absence of x32 system calls\n");  in test_syscalls_without_x32()
300 	check_for(msb, 0 | X32_BIT, 999 | X32_BIT, -ENOSYS);  in test_syscalls_without_x32()
306 		0, 1, -1, X32_BIT-1, X32_BIT, X32_BIT-1, -X32_BIT, INT_MAX,  in test_syscall_numbering()
310 	sh->indent++;  in test_syscall_numbering()
321 		sh->indent++;  in test_syscall_numbering()
329 		sh->indent--;  in test_syscall_numbering()
332 	sh->indent--;  in test_syscall_numbering()
345 	for (sh->ptrace_pass = pass = PTP_NOTHING; pass < PTP_DONE;  in syscall_numbering_tracee()
346 	     sh->ptrace_pass = ++pass) {  in syscall_numbering_tracee()
356 	sh->probing_syscall = false; /* Do this on entry only */  in mess_with_syscall()
409 		if (sh->probing_syscall && WSTOPSIG(wstatus) == SIGTRAP)  in syscall_numbering_tracer()
410 			mess_with_syscall(testpid, sh->ptrace_pass);  in syscall_numbering_tracer()
411 	} while (sh->ptrace_pass != PTP_DONE &&  in syscall_numbering_tracer()
473 	nerr = sh->nerr;  in main()