Remove the notion of "sys*"

- This idea originates from very early in the project and was, at the
  time, a very easy way to categorise things.
- Now, it doesn't really make much sense - it is fairly arbitary, often
  occuring when there is a change in kernel, but not from builder-hex0
  to fiwix, and sysb is in reality completely unnecessary.
- In short, the sys* stuff is a bit of a mess that makes the project
  more difficult to understand.
- This puts everything down into one folder and has a manifest file that
  is used to generate the build scripts on the fly rather than using
  coded scripts.
- This is created in the "seed" stage.

stage0-posix -- (calls) --> seed -- (generates) --> main steps

Alongside this change there are a variety of other smaller fixups to the
general structure of the live-bootstrap rootfs.

- Creating a rootfs has become much simpler and is defined as code in
  go.sh. The new structure, for an about-to-be booted system, is

/
-- /steps (direct copy of steps/)
-- /distfiles (direct copy of distfiles/)
-- all files from seed/*
-- all files from seed/stage0-posix/*

- There is no longer such a thing as /usr/include/musl, this didn't
  really make any sense, as musl is the final libc used. Rather, to
  separate musl and mes, we have /usr/include/mes, which is much easier
  to work with.
- This also makes mes easier to blow away later.
- A few things that weren't properly in packages have been changed;
  checksum-transcriber, simple-patch, kexec-fiwix have all been given
  fully qualified package names.
- Highly breaking change, scripts now exist in their package directory
  but NOT WITH THE packagename.sh. Rather, they use pass1.sh, pass2.sh,
  etc. This avoids manual definition of passes.
  - Ditto with patches; default directory is patches, but then any patch
    series specific to a pass are named patches-passX.

steps/musl-1.1.24/pass1.sh

@@ -0,0 +1,31 @@
+# SPDX-FileCopyrightText: 2021 Andrius Štikonas <andrius@stikonas.eu>
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+src_prepare() {
+    default
+
+    # tcc does not support complex types
+    rm -rf src/complex
+
+    # Configure fails without this
+    mkdir -p /dev
+}
+
+src_configure() {
+    CC=tcc ./configure \
+      --host=i386 \
+      --disable-shared \
+      --prefix="${PREFIX}" \
+      --libdir="${LIBDIR}" \
+      --includedir="${PREFIX}/include/"
+
+    # configure script creates this file
+    if test -f /dev/null; then
+        rm /dev/null
+    fi
+}
+
+src_compile() {
+    make "${MAKEJOBS}" CROSS_COMPILE= AR="tcc -ar" RANLIB=true CFLAGS="-DSYSCALL_NO_TLS"
+}

steps/musl-1.1.24/pass2.sh

@@ -0,0 +1 @@
+pass1.sh

steps/musl-1.1.24/pass3.sh

@@ -0,0 +1,33 @@
+# SPDX-FileCopyrightText: 2021 Andrius Štikonas <andrius@stikonas.eu>
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+src_prepare() {
+    default
+
+    # tcc does not support complex types
+    rm -rf src/complex
+}
+
+src_configure() {
+    CC=tcc ./configure \
+      --host=i386 \
+      --disable-shared \
+      --prefix="${PREFIX}" \
+      --libdir="${LIBDIR}" \
+      --includedir="${PREFIX}/include"
+
+    # configure script creates this file
+    if test -f /dev/null; then
+        rm /dev/null
+    fi
+}
+
+src_compile() {
+    make "${MAKEJOBS}" PREFIX="${PREFIX}" CROSS_COMPILE= CFLAGS="-DSYSCALL_NO_TLS" AS_CMD='as -o $@ $<'
+}
+
+src_install() {
+    rm -rf "${PREFIX}/include"
+    make PREFIX="${PREFIX}" DESTDIR="${DESTDIR}" install
+}

steps/musl-1.1.24/patches-pass3/avoid_set_thread_area.patch

@@ -0,0 +1 @@
+../patches/avoid_set_thread_area.patch

steps/musl-1.1.24/patches-pass3/avoid_sys_clone.patch

@@ -0,0 +1 @@
+../patches/avoid_sys_clone.patch

steps/musl-1.1.24/patches-pass3/set_thread_area.patch

@@ -0,0 +1 @@
+../patches/set_thread_area.patch

steps/musl-1.1.24/patches-pass3/va_list.patch

@@ -0,0 +1 @@
+../patches/va_list.patch

steps/musl-1.1.24/patches/avoid_set_thread_area.patch

@@ -0,0 +1,43 @@
+# SPDX-FileCopyrightText: 2023 Richard Masters <grick23@gmail.com>
+# SPDX-License-Identifier: MIT
+diff -r -u musl-1.1.24.orig/arch/i386/pthread_arch.h musl-1.1.24/arch/i386/pthread_arch.h
+--- arch/i386/pthread_arch.h	2019-10-13 21:58:27.000000000 +0000
++++ arch/i386/pthread_arch.h	2023-04-07 11:56:04.649119523 +0000
+@@ -1,8 +1,8 @@
++extern pthread_t g_pthread;
++
+ static inline struct pthread *__pthread_self()
+ {
+-	struct pthread *self;
+-	__asm__ ("movl %%gs:0,%0" : "=r" (self) );
+-	return self;
++	return g_pthread;
+ }
+ 
+ #define TP_ADJ(p) (p)
+diff -r -u musl-1.1.24.orig/src/env/__init_tls.c musl-1.1.24/src/env/__init_tls.c
+--- src/env/__init_tls.c	2019-10-13 21:58:27.000000000 +0000
++++ src/env/__init_tls.c	2023-04-07 11:56:43.565120289 +0000
+@@ -10,20 +10,19 @@
+ #include "syscall.h"
+ 
+ volatile int __thread_list_lock;
++pthread_t g_pthread;
+ 
+ int __init_tp(void *p)
+ {
+ 	pthread_t td = p;
+ 	td->self = td;
+-	int r = __set_thread_area(TP_ADJ(p));
+-	if (r < 0) return -1;
+-	if (!r) libc.can_do_threads = 1;
+ 	td->detach_state = DT_JOINABLE;
+ 	td->tid = __syscall(SYS_set_tid_address, &__thread_list_lock);
+ 	td->locale = &libc.global_locale;
+ 	td->robust_list.head = &td->robust_list.head;
+ 	td->sysinfo = __sysinfo;
+ 	td->next = td->prev = td;
++	g_pthread = td;
+ 	return 0;
+ }
+ 

steps/musl-1.1.24/patches/avoid_sys_clone.patch

@@ -0,0 +1,18 @@
+# SPDX-FileCopyrightText: 2023 Richard Masters <grick23@gmail.com>
+# SPDX-License-Identifier: MIT
+--- src/process/posix_spawn.c	2019-10-13 21:58:27.000000000 +0000
++++ src/process/posix_spawn.c	2023-04-07 11:50:47.253113271 +0000
+@@ -182,8 +182,11 @@
+ 	args.envp = envp;
+ 	pthread_sigmask(SIG_BLOCK, SIGALL_SET, &args.oldmask);
+ 
+-	pid = __clone(child, stack+sizeof stack,
+-		CLONE_VM|CLONE_VFORK|SIGCHLD, &args);
++	pid = fork();
++	if (pid == 0) {
++		_exit(child(&args));
++	}
++
+ 	close(args.p[1]);
+ 
+ 	if (pid > 0) {

steps/musl-1.1.24/patches/fenv.patch

@@ -0,0 +1,63 @@
+SPDX-FileCopyrightText: 2021 Andrius Štikonas <andrius@stikonas.eu>
+SPDX-FileCopyrightText: 2021 fosslinux <fosslinux@aussies.space>
+
+SPDX-License-Identifier: MIT
+
+tcc does not seem to support stmxcsr and ldmxcsr.
+Remove those. This might break float exception handling but we
+are unlikely to need it.
+diff -U3 -r src/fenv/i386/fenv.s src/fenv/i386/fenv.s
+--- src/fenv/i386/fenv.s	2019-10-13 22:58:27.000000000 +0100
++++ src/fenv/i386/fenv.s	2021-02-01 00:27:04.924135707 +0000
+@@ -17,7 +17,6 @@
+ 	jz 1f
+ 	fnclex
+ 1:	push %edx
+-	stmxcsr (%esp)
+ 	pop %edx
+ 	and $0x3f,%eax
+ 	or %eax,%edx
+@@ -26,7 +25,6 @@
+ 	not %ecx
+ 	and %ecx,%edx
+ 	push %edx
+-	ldmxcsr (%esp)
+ 	pop %edx
+ 1:	xor %eax,%eax
+ 	ret
+@@ -77,11 +75,9 @@
+ 	pop %edx
+ 	testl $0x02000000,(%edx)
+ 	jz 1f
+-	stmxcsr (%esp)
+ 	shl $3,%ch
+ 	andb $0x9f,1(%esp)
+ 	or %ch,1(%esp)
+-	ldmxcsr (%esp)
+ 1:	pop %ecx
+ 	ret
+ 
+@@ -107,7 +103,6 @@
+ 	testl $0x02000000,(%edx)
+ 	jz 1f
+ 	push %eax
+-	stmxcsr (%esp)
+ 	pop %edx
+ 	and $0x3f,%edx
+ 	or %edx,4(%ecx)
+@@ -143,7 +138,6 @@
+ 	shl $3,%ecx
+ 	or $0x1f80,%ecx
+ 	mov %ecx,4(%esp)
+-	ldmxcsr 4(%esp)
+ 1:	ret
+ 
+ .global fetestexcept
+@@ -158,7 +152,6 @@
+ 	pop %edx
+ 	testl $0x02000000,(%edx)
+ 	jz 1f
+-	stmxcsr 4(%esp)
+ 	or 4(%esp),%eax
+ 1:	and %ecx,%eax
+ 	ret

steps/musl-1.1.24/patches/makefile.patch

@@ -0,0 +1,17 @@
+SPDX-FileCopyrightText: 2021 Andrius Štikonas <andrius@stikonas.eu>
+SPDX-FileCopyrightText: 2021 fosslinux <fosslinux@aussies.space>
+
+SPDX-License-Identifier: MIT
+
+tcc -ar does not support creating empty archives
+--- Makefile	2019-10-13 22:58:27.000000000 +0100
++++ Makefile	2021-02-01 00:21:14.974687663 +0000
+@@ -167,7 +167,7 @@
+ 
+ $(EMPTY_LIBS):
+ 	rm -f $@
+-	$(AR) rc $@
++	touch $@
+ 
+ lib/%.o: obj/crt/$(ARCH)/%.o
+ 	cp $< $@

steps/musl-1.1.24/patches/musl_weak_symbols.patch

@@ -0,0 +1,17 @@
+SPDX-FileCopyrightText: 2021 Andrius Štikonas <andrius@stikonas.eu>
+SPDX-FileCopyrightText: 2021 fosslinux <fosslinux@aussies.space>
+
+SPDX-License-Identifier: MIT
+
+Replace weak symbols with strong to workaround an issue with tcc -ar
+This won't be necessary once we can rebuild with ar from binutils.
+--- src/include/features.h	2021-02-02 23:15:42.791932948 +0000
++++ src/include/features.h	2021-02-02 23:17:21.394647015 +0000
+@@ -6,6 +6,6 @@
+ #define weak __attribute__((__weak__))
+ #define hidden __attribute__((__visibility__("hidden")))
+ #define weak_alias(old, new) \
+-	extern __typeof(old) new __attribute__((__weak__, __alias__(#old)))
++	extern __typeof(old) new __attribute__((/*__weak__, */__alias__(#old)))
+ 
+ #endif

steps/musl-1.1.24/patches/set_thread_area.patch

@@ -0,0 +1,35 @@
+SPDX-FileCopyrightText: 2020 Rich Felker <dalias@aerifal.cx>
+
+SPDX-License-Identifier: MIT
+
+From 0b0640219338b80cf47026d1970b5503414ed7f3 Mon Sep 17 00:00:00 2001
+From: Rich Felker <dalias@aerifal.cx>
+Date: Sun, 30 Aug 2020 21:37:12 -0400
+Subject: fix i386 __set_thread_area fallback
+
+this code is only needed for pre-2.6 kernels, which are not actually
+supported anyway, and was never tested. the fallback path using
+SYS_modify_ldt failed to clear the upper bits of %eax (all ones due to
+SYS_set_thread_area's return value being an error) before modifying
+%al to attempt a new syscall.
+---
+ src/thread/i386/__set_thread_area.s | 1 +
+ 1 file changed, 1 insertion(+)
+
+(limited to 'src/thread/i386/__set_thread_area.s')
+
+diff --git src/thread/i386/__set_thread_area.s src/thread/i386/__set_thread_area.s
+index c2c21dd5..aa6852be 100644
+--- src/thread/i386/__set_thread_area.s
++++ src/thread/i386/__set_thread_area.s
+@@ -28,6 +28,7 @@ __set_thread_area:
+ 	ret
+ 2:
+ 	mov %ebx,%ecx
++	xor %eax,%eax
+ 	xor %ebx,%ebx
+ 	xor %edx,%edx
+ 	mov %ebx,(%esp)
+-- 
+cgit v1.2.1
+

steps/musl-1.1.24/patches/sigsetjmp.patch

@@ -0,0 +1,18 @@
+SPDX-FileCopyrightText: 2021 Andrius Štikonas <andrius@stikonas.eu>
+SPDX-FileCopyrightText: 2021 fosslinux <fosslinux@aussies.space>
+
+SPDX-License-Identifier: MIT
+
+tcc does not like jecxz instruction.
+--- src/signal/i386/sigsetjmp.s	2019-10-13 22:58:27.000000000 +0100
++++ src/signal/i386/sigsetjmp.s	2021-02-01 00:19:25.671735415 +0000
+@@ -5,7 +5,8 @@
+ sigsetjmp:
+ __sigsetjmp:
+ 	mov 8(%esp),%ecx
+-	jecxz 1f
++	cmp %ecx,0
++	je 1f
+ 
+ 	mov 4(%esp),%eax
+ 	popl 24(%eax)

steps/musl-1.1.24/patches/stdio_flush_on_exit.patch

@@ -0,0 +1,64 @@
+SPDX-FileCopyrightText: 2021 Paul Dersey <pdersey@gmail.com>
+
+SPDX-License-Identifier: MIT
+
+Make sure real __stdio_exit() is called on exit and not the dummy
+noop versions.  This fixes the issue of truncated output when redirecting
+output to a file or pipe.  It also fixes truncated output on programs
+that forget to call fclose()
+diff --git a/src/exit/exit.c b/src/exit/exit.c
+index a6869b37..a4164682 100644
+--- src/exit/exit.c
++++ src/exit/exit.c
+@@ -2,16 +2,6 @@
+ #include <stdint.h>
+ #include "libc.h"
+ 
+-static void dummy()
+-{
+-}
+-
+-/* atexit.c and __stdio_exit.c override these. the latter is linked
+- * as a consequence of linking either __toread.c or __towrite.c. */
+-weak_alias(dummy, __funcs_on_exit);
+-weak_alias(dummy, __stdio_exit);
+-weak_alias(dummy, _fini);
+-
+ extern weak hidden void (*const __fini_array_start)(void), (*const __fini_array_end)(void);
+ 
+ static void libc_exit_fini(void)
+diff --git a/src/internal/stdio_impl.h b/src/internal/stdio_impl.h
+index d7398f59..69141813 100644
+--- src/internal/stdio_impl.h
++++ src/internal/stdio_impl.h
+@@ -47,9 +47,9 @@ struct _IO_FILE {
+ 	struct __locale_struct *locale;
+ };
+ 
+-extern hidden FILE *volatile __stdin_used;
+-extern hidden FILE *volatile __stdout_used;
+-extern hidden FILE *volatile __stderr_used;
++extern FILE *volatile __stdin_used;
++extern FILE *volatile __stdout_used;
++extern FILE *volatile __stderr_used;
+ 
+ hidden int __lockfile(FILE *);
+ hidden void __unlockfile(FILE *);
+diff --git a/src/stdio/__stdio_exit.c b/src/stdio/__stdio_exit.c
+index a5e42c67..5947a141 100644
+--- src/stdio/__stdio_exit.c
++++ src/stdio/__stdio_exit.c
+@@ -1,10 +1,5 @@
+ #include "stdio_impl.h"
+ 
+-static FILE *volatile dummy_file = 0;
+-weak_alias(dummy_file, __stdin_used);
+-weak_alias(dummy_file, __stdout_used);
+-weak_alias(dummy_file, __stderr_used);
+-
+ static void close_file(FILE *f)
+ {
+ 	if (!f) return;
+-- 
+2.30.0
+

steps/musl-1.1.24/patches/va_list.patch

@@ -0,0 +1,41 @@
+SPDX-FileCopyrightText: 2019 Giovanni Mascellani <gio@debian.org>
+
+SPDX-License-Identifier: MIT
+
+From 1642f5982009e110615a29745f9cafd51a5c1597 Mon Sep 17 00:00:00 2001
+From: Giovanni Mascellani <gio@debian.org>
+Date: Tue, 11 Jun 2019 11:20:07 +0200
+Subject: [PATCH] stdarg.h: add support for tcc.
+
+---
+ arch/i386/bits/alltypes.h.in | 14 +++++++++++++-
+ 1 file changed, 13 insertions(+), 1 deletion(-)
+
+diff --git a/arch/i386/bits/alltypes.h.in b/arch/i386/bits/alltypes.h.in
+index 1a8432d3..44cb5987 100644
+--- arch/i386/bits/alltypes.h.in
++++ arch/i386/bits/alltypes.h.in
+@@ -2,7 +2,19 @@
+ #define _Int64 long long
+ #define _Reg int
+ 
+-#if __GNUC__ >= 3
++#ifdef __TINYC__
++typedef char *__builtin_va_list;
++#define __builtin_va_start(ap,last) ap = ((char *)&(last)) + ((sizeof(last)+3)&~3)
++#define __builtin_va_arg(ap,type) (ap += (sizeof(type)+3)&~3, *(type *)(ap - ((sizeof(type)+3)&~3)))
++#define __builtin_va_copy(dest, src) (dest) = (src)
++#define __builtin_va_end(ap)
++#ifndef __TINYC_redefine_va_list
++#define __TINYC_redefine_va_list
++#undef __DEFINED_va_list
++#endif
++#endif
++
++#if __GNUC__ >= 3 || defined(__TINYC__)
+ TYPEDEF __builtin_va_list va_list;
+ TYPEDEF __builtin_va_list __isoc_va_list;
+ #else
+-- 
+GitLab
+

steps/musl-1.1.24/sources

@@ -0,0 +1 @@
+https://musl.libc.org/releases/musl-1.1.24.tar.gz 1370c9a812b2cf2a7d92802510cca0058cc37e66a7bedd70051f0a34015022a3