[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[RFC PATCH 1/2] add basic user-space tests with qemu
|
From: |
Luca Dariz |
|
Subject: |
[RFC PATCH 1/2] add basic user-space tests with qemu |
|
Date: |
Thu, 19 Oct 2023 20:57:46 +0200 |
* tests/Makefrag.am: add rules to build simple user-space test
modules, including generating mig stubs. The tests reuse some kernel
code (the printf(), mach_atoi(), mem*(), str*() functions) so we can
use the freestanding environment and not depend on glibc.
* tests/README: add basic info on how to run and debug tests
* tests/configfrag.ac: add MIGUSER, required for user-space tests as
it might be different from the one used to ubild the kernel.
* tests/grub.cfg.single.template: add minimal grub config to boot a
module
* tests/include/device/cons.h: add a simplified version of
device/cons.h usable for tests
* tests/include/kern/printf.h: reuse kern/printf.h
* tests/include/mach/mig_support.h: add basic version for user-space
tests
* tests/include/syscalls.h: add prototypes for syscalls used in tests.
* tests/include/testlib.h: add definitions for common test
functionalities
* tests/include/util/atoi.h: reuse util/atoi.h
* tests/run-qemu.sh.template: add a simple qemu test runner
* tests/syscalls.S: generate syscalls entry points
* tests/test-hello.c: add basic smoke test
* tests/testlib.c: add the imnimal funcitonality to run a user-space
executable and reboot the system, and some test helpers.
---
tests/Makefrag.am | 125 +++++++++++++++++++++++++++++++
tests/README | 37 +++++++++
tests/configfrag.ac | 10 +++
tests/grub.cfg.single.template | 3 +
tests/include/device/cons.h | 10 +++
tests/include/kern/printf.h | 1 +
tests/include/mach/mig_support.h | 71 ++++++++++++++++++
tests/include/syscalls.h | 83 ++++++++++++++++++++
tests/include/testlib.h | 46 ++++++++++++
tests/include/util/atoi.h | 1 +
tests/run-qemu.sh.template | 22 ++++++
tests/syscalls.S | 4 +
tests/test-hello.c | 9 +++
tests/testlib.c | 125 +++++++++++++++++++++++++++++++
14 files changed, 547 insertions(+)
create mode 100644 tests/README
create mode 100644 tests/grub.cfg.single.template
create mode 100644 tests/include/device/cons.h
create mode 120000 tests/include/kern/printf.h
create mode 100644 tests/include/mach/mig_support.h
create mode 100644 tests/include/syscalls.h
create mode 100644 tests/include/testlib.h
create mode 120000 tests/include/util/atoi.h
create mode 100644 tests/run-qemu.sh.template
create mode 100644 tests/syscalls.S
create mode 100644 tests/test-hello.c
create mode 100644 tests/testlib.c
diff --git a/tests/Makefrag.am b/tests/Makefrag.am
index 2723f64a..c16326e8 100644
--- a/tests/Makefrag.am
+++ b/tests/Makefrag.am
@@ -23,4 +23,129 @@
if !PLATFORM_xen
TESTS += \
tests/test-multiboot
+
+# FIXME: how can we reliably detect a change on any header and reinstall them?
+$(MACH_TESTINSTALL):
+ mkdir -p $@
+ $(MAKE) install-data DESTDIR=$@
+
+prepare-test: $(MACH_TESTINSTALL)
+
+$(MIG_OUTDIR):
+ mkdir -p $@
+
+MACH_TESTINSTALL=$(builddir)/tests/include-mach
+MACH_TESTINCLUDE=$(MACH_TESTINSTALL)/$(prefix)/include
+
+MIGCOMUSER=$(MIGUSER) -n -cc cat - /dev/null
+MIG_OUTDIR=$(builddir)/tests/mig-out
+MIG_CPPFLAGS=-nostdinc -I$(MACH_TESTINCLUDE) -ggdb
+
+define generate_mig_client
+$(MIG_OUTDIR)/$(2).user.c: prepare-test $(MIG_OUTDIR)
$(srcdir)/include/$(1)/$(2).defs
+ $(CPP) $(MIG_CPPFLAGS) -o $(MIG_OUTDIR)/$(2).user.defs
$(srcdir)/include/$(1)/$(2).defs
+ $(MIGCOMUSER) $(MIGCOMFLAGS) $(MIGCOMUFLAGS) \
+ -user $(MIG_OUTDIR)/$(2).user.c -header $(MIG_OUTDIR)/$(2).user.h
\
+ -list $(MIG_OUTDIR)/$(2).user.msgids \
+ < $(MIG_OUTDIR)/$(2).user.defs
+endef
+
+define generate_mig_server
+$(MIG_OUTDIR)/$(2).server.c: prepare-test $(MIG_OUTDIR)
$(srcdir)/include/$(1)/$(2).defs
+ $(CPP) $(MIG_CPPFLAGS) -o $(MIG_OUTDIR)/$(2).server.defs
$(srcdir)/include/$(1)/$(2).defs
+ $(MIGCOMUSER) $(MIGCOMFLAGS) $(MIGCOMUFLAGS) \
+ -server $(MIG_OUTDIR)/$(2).server.c -header
$(MIG_OUTDIR)/$(2).server.h \
+ -list $(MIG_OUTDIR)/$(2).server.msgids
\
+ < $(MIG_OUTDIR)/$(2).server.defs
+endef
+
+MIG_GEN_CC= \
+ $(MIG_OUTDIR)/mach.user.c \
+ $(MIG_OUTDIR)/mach_host.user.c \
+ $(MIG_OUTDIR)/mach_port.user.c \
+ $(MIG_OUTDIR)/gnumach.user.c \
+ $(MIG_OUTDIR)/device_reply.user.c \
+ $(MIG_OUTDIR)/device.user.c \
+ $(MIG_OUTDIR)/exc.server.c
+
+# eval->info for debug
+$(eval $(call generate_mig_client,mach,mach))
+$(eval $(call generate_mig_client,mach,mach_host))
+$(eval $(call generate_mig_client,mach,mach_port))
+$(eval $(call generate_mig_client,mach,gnumach))
+$(eval $(call generate_mig_client,device,device_reply))
+$(eval $(call generate_mig_client,device,device))
+$(eval $(call generate_mig_server,mach,exc))
+
+
+TESTCFLAGS=-static -nostartfiles -nolibc \
+ -ffreestanding \
+ -I$(srcdir)/tests/include \
+ -I$(MACH_TESTINCLUDE) \
+ -I$(MIG_OUTDIR) \
+ -ggdb3 \
+ -DMIG_EOPNOTSUPP
+
+if HOST_ix86
+QEMU=qemu-system-i386
+QEMU_GDB_PORT ?= 11234
+endif
+if HOST_x86_64
+QEMU=qemu-system-x86_64
+QEMU_GDB_PORT ?= 1234
endif
+
+if enable_user32
+TESTCFLAGS += -m32
+MIG_CPPFLAGS += -m32
+endif
+
+# graphical console
+#GNUMACH_ARGS =
+#QEMU_OPTS = -m 512 -no-reboot
+GNUMACH_ARGS = console=com0
+QEMU_OPTS = -m 2048 -nographic -no-reboot
+SRC_TESTLIB= \
+ $(srcdir)/i386/i386/strings.c \
+ $(srcdir)/kern/printf.c \
+ $(srcdir)/kern/strings.c \
+ $(srcdir)/util/atoi.c \
+ $(srcdir)/tests/syscalls.S \
+ $(srcdir)/tests/testlib.c \
+ $(MIG_GEN_CC)
+
+module-%: $(srcdir)/tests/test-%.c $(SRC_TESTLIB) $(MACH_TESTINSTALL)
+ gcc $(TESTCFLAGS) $< $(SRC_TESTLIB) -o $@
+
+test-%.iso: module-% gnumach $(srcdir)/tests/grub.cfg.single.template
+ rm -rf $(builddir)/tests/isofiles
+ mkdir -p $(builddir)/tests/isofiles/boot/grub/
+ cat $(srcdir)/tests/grub.cfg.single.template | \
+ sed -e s/BOOTMODULE/$</g | \
+ sed -e "s/GNUMACHARGS/$(GNUMACH_ARGS)/g" | \
+ cat >$(builddir)/tests/isofiles/boot/grub/grub.cfg
+ cp gnumach $< $(builddir)/tests/isofiles/boot/
+ grub-mkrescue -o $@ $(builddir)/tests/isofiles
+
+tests/test-%: module-% test-%.iso $(srcdir)/tests/run-qemu.sh.template
+ cat $(srcdir)/tests/run-qemu.sh.template | \
+ sed -e "s/TESTNAME/$(subst module-,,$<)/g" | \
+ sed -e "s/QEMU_OPTS/$(QEMU_OPTS)/g" | \
+ sed -e "s/QEMU/$(QEMU)/g" | \
+ cat >$@
+ chmod +x $@
+
+check-%: tests/test-%
+ $^
+
+run-%: test-%.iso
+ $(QEMU) $(QEMU_OPTS) -cdrom $< | tail -n +18 # skip terminal
reconfiguration
+
+debug-%: test-%.iso
+ $(QEMU) $(QEMU_OPTS) -cdrom $< -gdb tcp::$(QEMU_GDB_PORT) -S | tail -n
+18
+
+
+TESTS += \
+ tests/test-hello
+
+endif # !PLATFORM_xen
diff --git a/tests/README b/tests/README
new file mode 100644
index 00000000..4cf25891
--- /dev/null
+++ b/tests/README
@@ -0,0 +1,37 @@
+
+There are some basic tests that can be run qith qemu. You can run all the
tests with
+
+ $ make check
+
+or selectively with:
+
+ $ make run-hello
+
+Also, you can debug the existing tests, or a new one, by starting on one shell
+
+ $ make debug-hello
+
+and on another shell you can attach with gdb, load the symbols of the
+bootstrap module and break on its _start():
+
+ $ gdb gnuamch
+ ...
+ (gdb) target remote :1234
+ ...
+ (gdb) b setup_main
+ Breakpoint 11 at 0xffffffff81019d60: file ../kern/startup.c, line 98.
+ (gdb) c
+ Continuing.
+
+ Breakpoint 11, setup_main () at ../kern/startup.c:98
+ 98 cninit();
+ (gdb) add-symbol-file ../gnumach/build-64/module-task
+ Reading symbols from ../gnumach/build-64/module-task...
+ (gdb) b _start
+ Breakpoint 12 at 0x40324a: _start. (2 locations)
+ (gdb) c
+ Continuing.
+
+ Breakpoint 12, _start () at ../tests/testlib.c:96
+ 96 {
+ (gdb)
diff --git a/tests/configfrag.ac b/tests/configfrag.ac
index 55c6da62..6fe1c3b9 100644
--- a/tests/configfrag.ac
+++ b/tests/configfrag.ac
@@ -22,6 +22,16 @@ dnl 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
USA.
AC_CONFIG_FILES([tests/test-multiboot], [chmod +x tests/test-multiboot])
+
+AC_CHECK_TOOL([MIGUSER], [miguser], [no])
+AC_ARG_VAR([MIGUSER], [Path to the mig tool for user-space tests])
+
+if test x$MIGUSER = xno
+then
+ AC_MSG_WARN([mig user was not found, we will not be able to run the
user-space tests. You can also specify the path with MIGUSER=])
+ MIGUSER=mig-user-not-found
+fi
+
dnl Local Variables:
dnl mode: autoconf
dnl End:
diff --git a/tests/grub.cfg.single.template b/tests/grub.cfg.single.template
new file mode 100644
index 00000000..0aed377e
--- /dev/null
+++ b/tests/grub.cfg.single.template
@@ -0,0 +1,3 @@
+multiboot /boot/gnumach GNUMACHARGS
+module /boot/BOOTMODULE BOOTMODULE '${host-port}' '${device-port}'
'$(task-create)' '$(task-resume)'
+boot
diff --git a/tests/include/device/cons.h b/tests/include/device/cons.h
new file mode 100644
index 00000000..6d097527
--- /dev/null
+++ b/tests/include/device/cons.h
@@ -0,0 +1,10 @@
+
+#ifndef CONS_H
+#define CONS_H
+
+#include <mach/machine/vm_types.h>
+
+void cnputc(char c, vm_offset_t cookie);
+static inline int cngetc() { return 0; }
+
+#endif /* CONS_H */
diff --git a/tests/include/kern/printf.h b/tests/include/kern/printf.h
new file mode 120000
index 00000000..c61f3e0e
--- /dev/null
+++ b/tests/include/kern/printf.h
@@ -0,0 +1 @@
+../../../kern/printf.h
\ No newline at end of file
diff --git a/tests/include/mach/mig_support.h b/tests/include/mach/mig_support.h
new file mode 100644
index 00000000..7006ae16
--- /dev/null
+++ b/tests/include/mach/mig_support.h
@@ -0,0 +1,71 @@
+/*
+ * Mach Operating System
+ * Copyright (c) 1992 Carnegie Mellon University
+ * All Rights Reserved.
+ *
+ * Permission to use, copy, modify and distribute this software and its
+ * documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ *
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
+ * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ *
+ * Carnegie Mellon requests users of this software to return to
+ *
+ * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
+ * School of Computer Science
+ * Carnegie Mellon University
+ * Pittsburgh PA 15213-3890
+ *
+ * any improvements or extensions that they make and grant Carnegie Mellon
+ * the rights to redistribute these changes.
+ */
+/*
+ * Abstract:
+ * MIG helpers for gnumach tests, mainly copied from glibc
+ *
+ */
+
+#ifndef _MACH_MIG_SUPPORT_H_
+#define _MACH_MIG_SUPPORT_H_
+
+#include <string.h>
+
+#include <mach/message.h>
+#include <mach/mach_types.h>
+
+#include <syscalls.h>
+
+static inline void mig_init(void *_first)
+{}
+
+static inline void mig_allocate(vm_address_t *addr, vm_size_t size)
+{
+ if (syscall_vm_allocate(mach_task_self(), addr, size, 1) != KERN_SUCCESS)
+ *addr = 0;
+}
+static inline void mig_deallocate(vm_address_t addr, vm_size_t size)
+{
+ syscall_vm_deallocate (mach_task_self(), addr, size);
+}
+static inline void mig_dealloc_reply_port(mach_port_t port)
+{}
+static inline void mig_put_reply_port(mach_port_t port)
+{}
+static inline mach_port_t mig_get_reply_port(void)
+{
+ return mach_reply_port();
+}
+static inline void mig_reply_setup(const mach_msg_header_t *_request,
+ mach_msg_header_t *reply)
+{}
+
+static inline vm_size_t mig_strncpy (char *dst, const char *src, vm_size_t len)
+{
+ return dst - strncpy(dst, src, len);
+}
+
+#endif /* not defined(_MACH_MIG_SUPPORT_H_) */
diff --git a/tests/include/syscalls.h b/tests/include/syscalls.h
new file mode 100644
index 00000000..053af79d
--- /dev/null
+++ b/tests/include/syscalls.h
@@ -0,0 +1,83 @@
+/*
+ * Mach Operating System
+ * Copyright (c) 1992 Carnegie Mellon University
+ * All Rights Reserved.
+ *
+ * Permission to use, copy, modify and distribute this software and its
+ * documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ *
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
+ * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ *
+ * Carnegie Mellon requests users of this software to return to
+ *
+ * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
+ * School of Computer Science
+ * Carnegie Mellon University
+ * Pittsburgh PA 15213-3890
+ *
+ * any improvements or extensions that they make and grant Carnegie Mellon
+ * the rights to redistribute these changes.
+ */
+/*
+ * Abstract:
+ * Syscall functions
+ *
+ */
+
+#ifndef _SYSCALLS_
+#define _SYSCALLS_
+
+#include <device/device_types.h>
+#include <mach/message.h>
+
+// TODO: there is probably a better way to define these
+
+#define MACH_SYSCALL0(syscallid, retval, name) \
+ retval name(void) __attribute__((naked));
+
+#define MACH_SYSCALL1(syscallid, retval, name, arg1) \
+ retval name(arg1 a1) __attribute__((naked));
+
+#define MACH_SYSCALL2(syscallid, retval, name, arg1, arg2) \
+ retval name(arg1 a1, arg2 a2) __attribute__((naked));
+
+#define MACH_SYSCALL3(syscallid, retval, name, arg1, arg2, arg3) \
+ retval name(arg1 a1, arg2 a2, arg3 a3) __attribute__((naked));
+
+#define MACH_SYSCALL4(syscallid, retval, name, arg1, arg2, arg3, arg4) \
+ retval name(arg1 a1, arg2 a2, arg3 a3, arg4 a4) __attribute__((naked));
+
+#define MACH_SYSCALL6(syscallid, retval, name, arg1, arg2, arg3, arg4, arg5,
arg6) \
+ retval name(arg1 a1, arg2 a2, arg3 a3, arg4 a4, arg5 a5, arg6 a6)
__attribute__((naked));
+
+#define MACH_SYSCALL7(syscallid, retval, name, arg1, arg2, arg3, arg4, arg5,
arg6, arg7) \
+ retval name(arg1 a1, arg2 a2, arg3 a3, arg4 a4, arg5 a5, arg6 a6, arg7 a7)
__attribute__((naked));
+
+#define mach_msg mach_msg_trap
+
+MACH_SYSCALL0(26, mach_port_name_t, mach_reply_port)
+MACH_SYSCALL0(27, mach_port_name_t, mach_thread_self)
+MACH_SYSCALL0(28, mach_port_name_t, mach_task_self)
+MACH_SYSCALL0(29, mach_port_name_t, mach_host_self)
+MACH_SYSCALL1(30, void, mach_print, const char*)
+MACH_SYSCALL0(31, kern_return_t, invalid_syscall)
+MACH_SYSCALL4(65, kern_return_t, syscall_vm_allocate, mach_port_t,
vm_offset_t*, vm_size_t, boolean_t)
+MACH_SYSCALL3(66, kern_return_t, syscall_vm_deallocate, mach_port_t,
vm_offset_t, vm_size_t)
+MACH_SYSCALL3(72, kern_return_t, syscall_mach_port_allocate, mach_port_t,
mach_port_right_t, mach_port_t*)
+MACH_SYSCALL2(73, kern_return_t, syscall_mach_port_deallocate, mach_port_t,
mach_port_t)
+
+/*
+ todo: swtch_pri swtch ...
+ these seem obsolete: evc_wait
+ evc_wait_clear syscall_device_writev_request
+ syscall_device_write_request ...
+ */
+MACH_SYSCALL6(40, io_return_t, syscall_device_write_request, mach_port_name_t,
+ mach_port_name_t, dev_mode_t, recnum_t, vm_offset_t, vm_size_t)
+
+#endif /* SYSCALLS */
diff --git a/tests/include/testlib.h b/tests/include/testlib.h
new file mode 100644
index 00000000..1fddcd95
--- /dev/null
+++ b/tests/include/testlib.h
@@ -0,0 +1,46 @@
+
+#ifndef TESTLIB_H
+#define TESTLIB_H
+
+// in freestanding we can only use a few standard headers
+// float.h iso646.h limits.h stdarg.h stdbool.h stddef.h stdint.h
+
+#include <stddef.h>
+#include <stdint.h>
+#include <stdarg.h>
+#include <stdbool.h>
+
+#include <string.h> // we shouldn't include this from gcc, but it seems to be
ok
+
+#include <mach/mach_types.h>
+#include <kern/printf.h>
+#include <util/atoi.h>
+#include <syscalls.h>
+
+#define ASSERT(cond) do { \
+ if (!(cond)) \
+ { \
+ printf("error: " #cond " failed\n"); \
+ halt(); \
+ } \
+ } while (0)
+
+#define ASSERT_RET(ret, msg) do { \
+ if ((ret) != KERN_SUCCESS) \
+ { \
+ printf("error %s (0x%x): %s\n", e2s((ret)), (ret), (msg)); \
+ halt(); \
+ } \
+ } while (0)
+
+const char* e2s(int err);
+void halt();
+int msleep(uint32_t timeout);
+void perror(int err, const char *s);
+
+mach_port_t host_priv(void);
+mach_port_t device_priv(void);
+
+int main(int argc, char *argv[], int envc, char *envp[]);
+
+#endif /* TESTLIB_H */
diff --git a/tests/include/util/atoi.h b/tests/include/util/atoi.h
new file mode 120000
index 00000000..c32c2582
--- /dev/null
+++ b/tests/include/util/atoi.h
@@ -0,0 +1 @@
+../../../util/atoi.h
\ No newline at end of file
diff --git a/tests/run-qemu.sh.template b/tests/run-qemu.sh.template
new file mode 100644
index 00000000..1f116354
--- /dev/null
+++ b/tests/run-qemu.sh.template
@@ -0,0 +1,22 @@
+#!/bin/sh
+
+set -e
+
+cmd="QEMU QEMU_OPTS -cdrom test-TESTNAME.iso"
+out=out-TESTNAME
+if which QEMU >/dev/null ; then
+ if ! timeout -v --foreground --kill-after=3 15s $cmd > $out; then
+ tail -n +18 $out # skip terminal reconfiguration
+ exit 10
+ fi
+ if grep -qi error $out; then # TODO: check test failure or success
+ tail -n +18 $out # skip terminal reconfiguration
+ exit 11
+ fi
+ if ! grep -q reboot $out; then # check that we reached the end
+ tail -n +18 $out # skip terminal reconfiguration
+ exit 12
+ fi
+else
+ exit 77 # skip, qemu nut available
+fi
diff --git a/tests/syscalls.S b/tests/syscalls.S
new file mode 100644
index 00000000..df9c9bc0
--- /dev/null
+++ b/tests/syscalls.S
@@ -0,0 +1,4 @@
+
+ #include <mach/syscall_sw.h>
+
+ kernel_trap(invalid_syscall,-31,0)
diff --git a/tests/test-hello.c b/tests/test-hello.c
new file mode 100644
index 00000000..68ae45de
--- /dev/null
+++ b/tests/test-hello.c
@@ -0,0 +1,9 @@
+
+#include <testlib.h>
+
+int main(int argc, char *argv[], int envc, char *envp[])
+{
+ int ret = printf("hello!!\n");
+ ASSERT(ret == 0);
+ return 0;
+}
diff --git a/tests/testlib.c b/tests/testlib.c
new file mode 100644
index 00000000..13aa2614
--- /dev/null
+++ b/tests/testlib.c
@@ -0,0 +1,125 @@
+
+#include <testlib.h>
+
+#include <device/cons.h>
+#include <mach/kern_return.h>
+#include <mach/message.h>
+#include <mach/mig_errors.h>
+#include <mach/vm_param.h>
+
+#include <mach.user.h>
+#include <mach_host.user.h>
+
+
+static int argc = 0;
+static char *argv_unknown[] = {"unknown", "m1", "123", "456"};
+static char **argv = argv_unknown;
+static char **envp = NULL;
+static int envc = 0;
+
+static mach_port_t host_priv_port = 1;
+static mach_port_t device_master_port = 2;
+
+void cnputc(char c, vm_offset_t cookie)
+{
+ char buf[2] = {c, 0};
+ mach_print(buf);
+}
+
+mach_port_t host_priv(void)
+{
+ return host_priv_port;
+}
+
+mach_port_t device_priv(void)
+{
+ return device_master_port;
+}
+
+void halt()
+{
+ printf("reboot ...\n");
+ int ret = host_reboot(host_priv_port, 0);
+ perror(ret, "host_reboot() failed!");
+ while (1)
+ ;
+}
+
+// from glibc's sysdeps/mach/usleep.c
+int msleep(uint32_t timeout)
+{
+ mach_port_t recv = mach_reply_port();
+ return mach_msg(NULL, MACH_RCV_MSG|MACH_RCV_TIMEOUT|MACH_RCV_INTERRUPT,
+ 0, 0, recv, timeout, MACH_PORT_NULL);
+}
+
+const char* e2s(int err)
+{
+ switch (err)
+ {
+ case MACH_SEND_INVALID_DATA: return "MACH_SEND_INVALID_DATA";
+ case MACH_SEND_INVALID_DEST: return "MACH_SEND_INVALID_DEST";
+ case MACH_SEND_TIMED_OUT: return "MACH_SEND_TIMED_OUT";
+ case MACH_SEND_INVALID_RIGHT: return "MACH_SEND_INVALID_RIGHT";
+ case MACH_SEND_INVALID_HEADER: return "MACH_SEND_INVALID_HEADER";
+ case MACH_SEND_INVALID_TYPE: return "MACH_SEND_INVALID_TYPE";
+ case MACH_SEND_INVALID_REPLY: return "MACH_SEND_INVALID_REPLY";
+ case MACH_SEND_MSG_TOO_SMALL: return "MACH_SEND_MSG_TOO_SMALL";
+ case MACH_RCV_INVALID_NAME: return "MACH_RCV_INVALID_NAME";
+ case MACH_RCV_TOO_LARGE: return "MACH_RCV_TOO_LARGE";
+ case MIG_TYPE_ERROR: return "MIG_TYPE_ERROR";
+ case MIG_REPLY_MISMATCH: return "MIG_REPLY_MISMATCH";
+ case MIG_SERVER_DIED: return "MIG_SERVER_DIED";
+ case KERN_NO_SPACE: return "KERN_NO_SPACE";
+ case KERN_INVALID_ARGUMENT: return "KERN_INVALID_ARGUMENT";
+ case KERN_FAILURE: return "KERN_FAILURE";
+ case KERN_TIMEDOUT: return "KERN_TIMEDOUT";
+ case KERN_INVALID_TASK: return "KERN_INVALID_TASK";
+ case KERN_INVALID_HOST: return "KERN_INVALID_HOST";
+ case KERN_INVALID_RIGHT: return "KERN_INVALID_RIGHT";
+ case KERN_INVALID_VALUE: return "KERN_INVALID_VALUE";
+ case KERN_NAME_EXISTS: return "KERN_NAME_EXISTS";
+ default: return "unknown";
+ }
+}
+
+/*
+ * Report a test error, translating the error code.
+ */
+void perror(int err, const char *s)
+{
+ printf("error %s (0x%x): %s\n", e2s(err), err, s);
+}
+
+/*
+ * Minimal _start() for test modules, we just take the arguments from
+ * the kernel, call main() and reboot.
+ */
+void _start()
+{
+ // magic from _hurd_startup, but here somehow we need +1 instead of +2
+ void **argptr = (void **) __builtin_frame_address (0) + 1;
+ intptr_t* argcptr = (intptr_t*)argptr;
+ argc = argcptr[0];
+ argv = (char **) &argcptr[1];
+ envp = &argv[argc + 1];
+ envc = 0;
+
+ while (envp[envc])
+ ++envc;
+
+ mach_atoi(argv[1], &host_priv_port);
+ mach_atoi(argv[2], &device_master_port);
+
+ printf("started %s", argv[0]);
+ for (int i=1; i<argc; i++)
+ {
+ printf(" %s", argv[i]);
+ }
+ printf("\n");
+
+ int ret = main(argc, argv, envc, envp);
+
+ printf("module %s exit code %x\n", argv[0], ret);
+ halt();
+}
--
2.39.2