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Implement kernel bootstrap up to building Linux.

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This commit is contained in:
rick-masters 2023-03-31 18:08:50 +00:00
parent 5ea8dd3136
commit ecf99ab08b
52 changed files with 4898 additions and 139 deletions
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11
sysa/musl-1.2.3/musl-1.2.3.sh
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@ -2,6 +2,17 @@
#
# SPDX-License-Identifier: GPL-3.0-or-later
src_get() {
# Before the last pass the tar file is moved before
# the linux build removes all distfiles to save space.
if [ -e "../${pkg}.tar.gz" ]; then
mkdir "${DISTFILES}"
mv "../${pkg}.tar.gz" "${DISTFILES}"
else
default
fi
}
src_configure() {
CC=gcc ./configure \
--host=i386-unknown-linux-musl \

57
sysa/musl-1.2.3/patches/avoid_set_thread_area.patch Normal file
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@ -0,0 +1,57 @@
# SPDX-FileCopyrightText: 2023 Richard Masters <grick23@gmail.com>
# SPDX-License-Identifier: MIT
diff -u -r musl-1.2.3.orig/arch/i386/pthread_arch.h musl-1.2.3/arch/i386/pthread_arch.h
--- arch/i386/pthread_arch.h 2022-04-07 17:12:40.000000000 +0000
+++ arch/i386/pthread_arch.h 2022-12-19 23:39:10.890414014 +0000
@@ -1,8 +1,14 @@
+#define BOOTSTRAP
+extern uintptr_t g_pthread;
static inline uintptr_t __get_tp()
{
+#ifndef BOOTSTRAP
uintptr_t tp;
__asm__ ("movl %%gs:0,%0" : "=r" (tp) );
return tp;
+#else
+ return g_pthread;
+#endif
}
#define MC_PC gregs[REG_EIP]
diff -u -r musl-1.2.3.orig/arch/i386/syscall_arch.h musl-1.2.3/arch/i386/syscall_arch.h
--- arch/i386/syscall_arch.h 2022-04-07 17:12:40.000000000 +0000
+++ arch/i386/syscall_arch.h 2022-12-20 17:28:21.734839560 +0000
@@ -1,3 +1,4 @@
+#define SYSCALL_NO_TLS 1
#define __SYSCALL_LL_E(x) \
((union { long long ll; long l[2]; }){ .ll = x }).l[0], \
((union { long long ll; long l[2]; }){ .ll = x }).l[1]
diff -u -r musl-1.2.3.orig/src/env/__init_tls.c musl-1.2.3/src/env/__init_tls.c
--- src/env/__init_tls.c 2022-04-07 17:12:40.000000000 +0000
+++ src/env/__init_tls.c 2022-12-19 23:39:42.362414223 +0000
@@ -10,20 +10,25 @@
#include "syscall.h"
volatile int __thread_list_lock;
+#define BOOTSTRAP
+uintptr_t g_pthread;
int __init_tp(void *p)
{
pthread_t td = p;
td->self = td;
+#ifndef BOOTSTRAP
int r = __set_thread_area(TP_ADJ(p));
if (r < 0) return -1;
if (!r) libc.can_do_threads = 1;
+#endif
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 = (uintptr_t) td;
return 0;
}

21
sysa/musl-1.2.3/patches/avoid_sys_clone.patch Normal file
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@ -0,0 +1,21 @@
# SPDX-FileCopyrightText: 2023 Richard Masters <grick23@gmail.com>
# SPDX-License-Identifier: MIT
diff -u -r musl-1.2.3.orig/src/process/posix_spawn.c musl-1.2.3/src/process/posix_spawn.c
--- src/process/posix_spawn.c 2022-04-07 17:12:40.000000000 +0000
+++ src/process/posix_spawn.c 2022-12-19 23:47:31.858417338 +0000
@@ -190,8 +190,15 @@
goto fail;
}
+#if 0
pid = __clone(child, stack+sizeof stack,
CLONE_VM|CLONE_VFORK|SIGCHLD, &args);
+#endif
+ pid = fork();
+ if (pid == 0) {
+ _exit(child(&args));
+ }
+
close(args.p[1]);
UNLOCK(__abort_lock);