Test "Scalable Vector Extension (SVE) support." on arm64

Change-Id: I3abaca932985a06b06887b962e769f2eac96c738

test/sve/src/014.c

@@ -0,0 +1,180 @@
+/* 014.c COPYRIGHT FUJITSU LIMITED 2016-2019 */
+/* ptrace(SETREGSET + NT_ARM_SVE) check, use brk instruction. */
+#include <stdio.h>
+#include <stdlib.h>
+#include <signal.h>
+#include <errno.h>
+#include <string.h>
+#include <sys/ptrace.h>
+#include <sys/uio.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include "common.h"
+
+/* rewrite instruction addr buffer */
+static unsigned long inst_addr;
+
+static int child_func(unsigned int vq)
+{
+	int ret = -1;
+	struct fpsimd_sve_state(vq) cmp_buf;
+	struct fpsimd_sve_state(vq) rd_buf;
+	unsigned int fpscr[2] = { 0, 0 };
+
+	memset(&cmp_buf, 0, sizeof(struct fpsimd_sve_state(vq)));
+	memset(&rd_buf, 0, sizeof(struct fpsimd_sve_state(vq)));
+
+	/* send PTRACE_TRACEME */
+	if (ptrace(PTRACE_TRACEME, 0, NULL, NULL)) {
+		perror("ptrace(PTRACE_TRACEME)");
+		goto out;
+	}
+
+	/* gen and read register */
+	gen_test_sve(&cmp_buf, vq);
+	read_sve(&rd_buf, vq, fpscr);
+
+	/* stop mine, brk instruction */
+	/* rewrite nop from parent process */
+	asm volatile(
+		"adr x10, 1f\n"
+		"str x10, [%0]\n"
+		"nop\n"
+		"nop\n"
+		"1:\n"
+		"brk #0\n"
+		"nop\n"
+		: /* nothing */
+		: "r"(&inst_addr)
+		: "x10"
+	);
+
+	/* read register */
+	read_sve(&rd_buf, vq, fpscr);
+
+	/* compare */
+	if (sve_compare(&cmp_buf, &rd_buf, vq)) {
+		printf("child-process compare failed.\n");
+		goto out;
+	}
+
+	/* success */
+	ret = 0;
+out:
+	return ret;
+}
+
+static int parent_func(pid_t cpid, unsigned int vq)
+{
+	int ret = -1;
+	struct user_fpsimd_sve_state(vq) wr_buf;
+	struct iovec iov;
+	unsigned long addr = 0;
+
+	memset(&wr_buf, 0, sizeof(wr_buf));
+	memset(&iov, 0, sizeof(iov));
+
+	/* wait child stop */
+	if (wait_child_stop(cpid)) {
+		goto out;
+	}
+
+	/* PTRACE_GETREGSET */
+	iov.iov_len = sizeof(wr_buf);
+	iov.iov_base = &wr_buf;
+	if (ptrace(PTRACE_GETREGSET, cpid, NT_ARM_SVE, &iov)) {
+		perror("ptrace(PTRACE_GETREGSET)");
+		goto cont;
+	}
+
+	/* header compare */
+	if (header_compare(&wr_buf.header)) {
+		printf("ptrace(PTRACE_GETREGSET) header compare failed.\n");
+		goto cont;
+	}
+
+	/* gen register */
+	gen_test_sve(&wr_buf.regs, vq);
+
+	/* PTRACE_SETREGSET */
+	iov.iov_len = sizeof(wr_buf);
+	iov.iov_base = &wr_buf;
+	if (ptrace(PTRACE_SETREGSET, cpid, NT_ARM_SVE, &iov)) {
+		perror("ptrace(PTRACE_SETREGSET)");
+		goto cont;
+	}
+
+	/* read child brk address */
+	addr = ptrace(PTRACE_PEEKDATA, cpid, &inst_addr, NULL);
+	if ((addr == -1) && errno) {
+		perror("ptrace(PTRACE_PEEKDATA)");
+		goto cont;
+	}
+
+	/* write nop instruction */
+	/* 0xd503201f equal nop instruction */
+	if (ptrace(PTRACE_POKETEXT, cpid, addr, 0xd503201fd503201fUL)) {
+		perror("ptrace(PTRACE_POKETEXT)");
+		goto cont;
+	}
+
+	/* success */
+	ret = 0;
+cont:
+	/* child continue */
+	if (ptrace(PTRACE_CONT, cpid, NULL, NULL)) {
+		perror("ptrace(PTRACE_CONT)");
+		ret = -1;
+	}
+out:
+	return ret;
+}
+
+TEST_FUNC(TEST_NUMBER, unused1, vq, unused2, unused3)
+{
+	pid_t cpid = 0;
+	int func_ret = 0;
+	int ret = -1;
+
+	print_test_overview(tp_num);
+
+	/* create child process */
+	cpid = fork();
+	switch (cpid) {
+	case -1:
+		/* fork() error. */
+		perror("fork()");
+		goto out;
+	case 0:
+		/* child process */
+		func_ret = child_func(vq);
+
+		/* child exit */
+		exit(func_ret);
+		break;
+	default:
+		/* parent process */
+		func_ret = parent_func(cpid, vq);
+
+		/* wait child */
+		if (wait_child_exit(cpid)) {
+			goto out;
+		}
+
+		/* parent_func check */
+		if (func_ret) {
+			goto out;
+		}
+		break;
+	}
+
+	/* sccess. */
+	ret = 0;
+out:
+	if (ret == 0) {
+		printf("RESULT: OK.\n");
+	} else {
+		printf("RESULT: NG.\n");
+	}
+	return ret;
+}