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-rw-r--r--kernel/arch/vax/execregs.c166
-rw-r--r--kernel/arch/vax/execregs.h77
-rw-r--r--kernel/arch/vax/h_execregs.S87
3 files changed, 330 insertions, 0 deletions
diff --git a/kernel/arch/vax/execregs.c b/kernel/arch/vax/execregs.c
new file mode 100644
index 000000000000..414b810336d8
--- /dev/null
+++ b/kernel/arch/vax/execregs.c
@@ -0,0 +1,166 @@
+/* $NetBSD: execregs.c,v 1.1 2025/02/27 00:55:32 riastradh Exp $ */
+
+/*-
+ * Copyright (c) 2025 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__RCSID("$NetBSD: execregs.c,v 1.1 2025/02/27 00:55:32 riastradh Exp $");
+
+#include "execregs.h"
+
+#include <errno.h>
+#include <spawn.h>
+#include <stddef.h>
+#include <unistd.h>
+
+extern char **environ;
+
+static unsigned long
+nonnull(unsigned long x)
+{
+
+ x |= x << 8;
+ x |= x << 16;
+ return x;
+}
+
+int
+execregschild(char *path)
+{
+ /* fp: frame pointer, nonnull */
+ /* ap: argument pointer, on user stack, nonnull */
+ /* sp: stack pointer, nonnull */
+ register long r0 __asm("r0") = nonnull(0x10);
+ register long r1 __asm("r1") = nonnull(1);
+ register long r2 __asm("r2") = nonnull(2);
+ register long r3 __asm("r3") = nonnull(3);
+ register long r4 __asm("r4") = nonnull(4);
+ register long r5 __asm("r5") = nonnull(5);
+ register long r6 __asm("r6") = nonnull(6);
+ register long r7 __asm("r7") = nonnull(7);
+ register long r8 __asm("r8") = nonnull(8);
+ register long r9 __asm("r9") = nonnull(9);
+ register long r10 __asm("r10") = nonnull(10);
+ register long r11 __asm("r11") = nonnull(11);
+ /* pc: user PC, will be nonnull */
+ /* psl: processor status longword, will be nonnull */
+
+ char *argv[] = {path, NULL};
+ char **envp = environ;
+
+ /*
+ * Not perfect -- compiler might use some registers for
+ * stack/argument transfers, but all the arguments are nonnull
+ * so this is probably a good test anyway.
+ */
+ __asm volatile("" :
+ "+r"(r0),
+ "+r"(r1),
+ "+r"(r2),
+ "+r"(r3),
+ "+r"(r4),
+ "+r"(r5),
+ "+r"(r6),
+ "+r"(r7),
+ "+r"(r8),
+ "+r"(r9),
+ "+r"(r10),
+ "+r"(r11)
+ :: "memory");
+
+ return execve(path, argv, envp);
+}
+
+pid_t
+spawnregschild(char *path, int fd)
+{
+ /* fp: frame pointer, nonnull */
+ /* ap: argument pointer, on user stack, nonnull */
+ /* sp: stack pointer, nonnull */
+ register long r0 __asm("r0") = nonnull(0x10);
+ register long r1 __asm("r1") = nonnull(1);
+ register long r2 __asm("r2") = nonnull(2);
+ register long r3 __asm("r3") = nonnull(3);
+ register long r4 __asm("r4") = nonnull(4);
+ register long r5 __asm("r5") = nonnull(5);
+ register long r6 __asm("r6") = nonnull(6);
+ register long r7 __asm("r7") = nonnull(7);
+ register long r8 __asm("r8") = nonnull(8);
+ register long r9 __asm("r9") = nonnull(9);
+ register long r10 __asm("r10") = nonnull(10);
+ register long r11 __asm("r11") = nonnull(11);
+ /* pc: user PC, will be nonnull */
+ /* psl: processor status longword, will be nonnull */
+
+ char *argv[] = {path, NULL};
+ char **envp = environ;
+ posix_spawn_file_actions_t fileacts;
+ posix_spawnattr_t attr;
+ pid_t pid;
+ int error;
+
+ error = posix_spawn_file_actions_init(&fileacts);
+ if (error)
+ goto out;
+ error = posix_spawn_file_actions_adddup2(&fileacts, fd, STDOUT_FILENO);
+ if (error)
+ goto out;
+ error = posix_spawnattr_init(&attr);
+ if (error)
+ goto out;
+
+ /*
+ * Not perfect -- compiler might use some registers for
+ * stack/argument transfers, but all the arguments are nonnull
+ * so this is probably a good test anyway.
+ */
+ __asm volatile("" :
+ "+r"(r0),
+ "+r"(r1),
+ "+r"(r2),
+ "+r"(r3),
+ "+r"(r4),
+ "+r"(r5),
+ "+r"(r6),
+ "+r"(r7),
+ "+r"(r8),
+ "+r"(r9),
+ "+r"(r10),
+ "+r"(r11)
+ :: "memory");
+
+ error = posix_spawn(&pid, path, &fileacts, &attr, argv, envp);
+ if (error)
+ goto out;
+
+out: posix_spawnattr_destroy(&attr);
+ posix_spawn_file_actions_destroy(&fileacts);
+ if (error) {
+ errno = error;
+ return -1;
+ }
+ return 0;
+}
diff --git a/kernel/arch/vax/execregs.h b/kernel/arch/vax/execregs.h
new file mode 100644
index 000000000000..882bcd1b6702
--- /dev/null
+++ b/kernel/arch/vax/execregs.h
@@ -0,0 +1,77 @@
+/* $NetBSD: execregs.h,v 1.1 2025/02/27 00:55:32 riastradh Exp $ */
+
+/*-
+ * Copyright (c) 2025 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef TESTS_KERNEL_ARCH_VAX_EXECREGS_H
+#define TESTS_KERNEL_ARCH_VAX_EXECREGS_H
+
+#include <sys/cdefs.h>
+
+#define NEXECREGS 12
+
+#ifndef _LOCORE
+
+#include <unistd.h>
+
+/*
+ * The order matches that in struct trapframe in
+ * sys/arch/vax/include/trap.h
+ *
+ * Must match h_execregs.S.
+ *
+ * See also sys/arch/vax/vax/trap.c:setregs()
+ */
+static const char *const regname[] = {
+ "fp", /* Stack frame pointer */
+ "ap", /* Argument pointer on user stack */
+ /* sp: stack pointer */
+ "r0", /* General registers saved upon trap/syscall */
+ "r1",
+ "r2",
+ "r3",
+ "r4",
+ "r5",
+ /* r6: initial stack pointer */
+ "r7",
+ "r8",
+ /* r9: ps_strings */
+ "r10",
+ "r11",
+ /* trap: type of trap, not a register */
+ /* code: trap specific code, not a register */
+ /* pc: user PC */
+ /* psl: processor status longword */
+};
+
+__CTASSERT(NEXECREGS == __arraycount(regname));
+
+int execregschild(char *);
+pid_t spawnregschild(char *, int);
+
+#endif /* _LOCORE */
+
+#endif /* TESTS_KERNEL_ARCH_VAX_EXECREGS_H */
diff --git a/kernel/arch/vax/h_execregs.S b/kernel/arch/vax/h_execregs.S
new file mode 100644
index 000000000000..27c5c2052867
--- /dev/null
+++ b/kernel/arch/vax/h_execregs.S
@@ -0,0 +1,87 @@
+/* $NetBSD: h_execregs.S,v 1.1 2025/02/27 00:55:32 riastradh Exp $ */
+
+/*-
+ * Copyright (c) 2025 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#define _LOCORE
+
+#include <sys/syscall.h>
+
+#include <machine/asm.h>
+
+#include "execregs.h"
+
+#define REGSIZE 4
+#define BUFSIZE (NEXECREGS * REGSIZE)
+#define SLOT(n) (n)*REGSIZE(%sp)
+
+ENTRY(execregs_start, 0)
+ /* store registers to a buffer on stack */
+ subl2 $BUFSIZE,%sp /* space for NEXECREGS registers */
+ movl %fp,SLOT(0) /* order matches execregs.h */
+ movl %ap,SLOT(1)
+ /* sp: stack pointer */
+ movl %r0,SLOT(2)
+ movl %r1,SLOT(3)
+ movl %r2,SLOT(4)
+ movl %r3,SLOT(5)
+ movl %r4,SLOT(6)
+ movl %r5,SLOT(7)
+ /* r6: initial stack pointer */
+ movl %r7,SLOT(8)
+ movl %r8,SLOT(9)
+ /* r9: ps_strings */
+ movl %r10,SLOT(10)
+ movl %r11,SLOT(11)
+
+ /* call write(STDOUT_FILENO, regs, sizeof(regs)) */
+ pushl $BUFSIZE /* arg2 := sizeof(regs) */
+ pushal 4(%sp) /* arg1 := regs */
+ pushl $1 /* arg0 := STDOUT_FILENO */
+ pushl $3 /* number of arguments */
+ movl %sp,%ap /* argument pointer */
+ chmk $SYS_write
+
+ bcs 2f /* bail if write failed */
+ cmpl $BUFSIZE,%r0 /* bail if wrote wrong # of bytes */
+ bneq 2f
+
+ /* call exit(0) */
+ pushl $0 /* arg0 := 0 */
+1: pushl $1 /* number of arguments */
+ movl %sp,%ap /* argument pointer */
+ chmk $SYS_exit
+ .word 0xffff /* paranoia -- illegal opcode */
+
+2: /* call exit(127) */
+ pushl $127 /* arg0 := 127 */
+ jmp 1b
+END(execregs_start)
+
+/* main stub to simplify linking */
+ENTRY(main, 0)
+ .word 0xffff /* illegal opcode */
+END(main)
generated by cgit v1.2.3 (git 2.25.1) at 2026-03-25 20:01:14 +0000