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Support malloc() on bare metal

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Your Actually Portable Executables now contains a simple virtual memory
that works similarly to the Linux Kernel in the sense that it maps your
physical memory to negative addresses. This is needed to support mmap()
and malloc(). This functionality has zero code size impact. For example
the MODE=tiny LIFE.COM executable is still only 12KB in size.

The APE bootloader code has also been simplified to improve readibility
and further elevate the elegance by which we're able to support so many
platforms thereby enhancing verifiability so that we may engender trust
in this bootloading process.
This commit is contained in:
Justine Tunney 2021-02-23 20:23:19 -08:00
parent ac3b1dfb21
commit edd9297eba
89 changed files with 900 additions and 1417 deletions
Download patch file Download diff file Expand all files Collapse all files

23
libc/calls/efi.c
View file

@ -1,23 +0,0 @@
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2021 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/efi.h"
#include "libc/nt/efi.h"
EFI_HANDLE __efi_image_handle;
EFI_SYSTEM_TABLE *__efi_system_table;

12
libc/calls/efi.h
View file

@ -1,12 +0,0 @@
#ifndef COSMOPOLITAN_LIBC_CALLS_EFI_H_
#define COSMOPOLITAN_LIBC_CALLS_EFI_H_
#include "libc/nt/efi.h"
#if !(__ASSEMBLER__ + __LINKER__ + 0)
COSMOPOLITAN_C_START_
extern EFI_HANDLE __efi_image_handle;
extern EFI_SYSTEM_TABLE *__efi_system_table;
COSMOPOLITAN_C_END_
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
#endif /* COSMOPOLITAN_LIBC_CALLS_EFI_H_ */

4
libc/calls/fstat.c
View file

@ -31,9 +31,9 @@ int fstat(int fd, struct stat *st) {
if (__isfdkind(fd, kFdZip)) {
return weaken(__zipos_fstat)(
(struct ZiposHandle *)(intptr_t)g_fds.p[fd].handle, st);
} else if (!IsWindows() && !IsMetal() && !IsUefi()) {
} else if (!IsWindows() && !IsMetal()) {
return sys_fstat(fd, st);
} else if (IsMetal() || IsUefi()) {
} else if (IsMetal()) {
return fstat_metal(fd, st);
} else {
if (!__isfdkind(fd, kFdFile)) return ebadf();

2
libc/calls/g_fds.c
View file

@ -30,7 +30,7 @@ hidden textstartup void InitializeFileDescriptors(void) {
fds = VEIL("r", &g_fds);
pushmov(&fds->n, ARRAYLEN(fds->__init_p));
fds->p = fds->__init_p;
if (IsMetal() || IsUefi()) {
if (IsMetal()) {
pushmov(&fds->f, 3ull);
fds->__init_p[STDIN_FILENO].kind = pushpop(kFdSerial);
fds->__init_p[STDOUT_FILENO].kind = pushpop(kFdSerial);

8
libc/calls/internal.h
View file

@ -197,7 +197,7 @@ u32 sys_getgid(void) hidden;
u32 sys_getsid(int) hidden;
u32 sys_gettid(void) hidden;
u32 sys_getuid(void) hidden;
void *sys_mmap(void *, u64, u32, u32, i64, i64, i64) hidden;
void *__sys_mmap(void *, u64, u32, u32, i64, i64, i64) hidden;
void *sys_mremap(void *, u64, u64, i32, void *) hidden;
void sys_exit(int) hidden;
@ -295,12 +295,6 @@ unsigned __wincrash_nt(struct NtExceptionPointers *);
int fstat_metal(int, struct stat *);
/*───────────────────────────────────────────────────────────────────────────│─╗
│ cosmopolitan § syscalls » uefi ─╬─│┼
╚────────────────────────────────────────────────────────────────────────────│*/
int sys_nanosleep_uefi(const struct timespec *, struct timespec *);
/*───────────────────────────────────────────────────────────────────────────│─╗
│ cosmopolitan § syscalls » drivers ─╬─│┼
╚────────────────────────────────────────────────────────────────────────────│*/

35
libc/calls/nanosleep-uefi.c
View file

@ -1,35 +0,0 @@
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2021 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/calls.h"
#include "libc/calls/efi.h"
#include "libc/nt/efi.h"
#include "libc/sysv/errfuns.h"
int sys_nanosleep_uefi(const struct timespec *req, struct timespec *rem) {
if (__efi_system_table->BootServices->Stall(
req->tv_sec * 1000000 + req->tv_nsec / 1000) == EFI_SUCCESS) {
if (rem) {
rem->tv_sec = 0;
rem->tv_nsec = 0;
}
return 0;
} else {
return eintr();
}
}

4
libc/calls/nanosleep.c
View file

@ -29,12 +29,10 @@ int nanosleep(const struct timespec *req, struct timespec *rem) {
if (req->tv_sec < 0 || !(0 <= req->tv_nsec && req->tv_nsec <= 999999999)) {
return einval();
}
if (!IsWindows() && !IsMetal() && !IsUefi() && !IsXnu()) {
if (!IsWindows() && !IsMetal() && !IsXnu()) {
return sys_nanosleep(req, rem);
} else if (IsXnu()) {
return sys_nanosleep_xnu(req, rem);
} else if (IsUefi()) {
return sys_nanosleep_uefi(req, rem);
} else if (IsMetal()) {
return enosys(); /* TODO: Sleep on Metal */
} else {

2
libc/calls/readv-serial.c
View file

@ -16,9 +16,9 @@
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "ape/lib/pc.h"
#include "libc/calls/internal.h"
#include "libc/nexgen32e/uart.internal.h"
#include "libc/runtime/pc.internal.h"
static bool IsDataAvailable(struct Fd *fd) {
return inb(fd->handle + UART_LSR) & UART_TTYDA;

3
libc/calls/readv.c
View file

@ -36,8 +36,7 @@ ssize_t readv(int fd, const struct iovec *iov, int iovlen) {
if (fd < g_fds.n && g_fds.p[fd].kind == kFdZip) {
return weaken(__zipos_read)(
(struct ZiposHandle *)(intptr_t)g_fds.p[fd].handle, iov, iovlen, -1);
} else if ((SupportsMetal() || SupportsUefi()) && fd < g_fds.n &&
g_fds.p[fd].kind == kFdSerial) {
} else if (SupportsMetal() && fd < g_fds.n && g_fds.p[fd].kind == kFdSerial) {
return readv_serial(&g_fds.p[fd], iov, iovlen);
} else if (!IsWindows()) {
return sys_readv(fd, iov, iovlen);

2
libc/calls/sigaction.c
View file

@ -144,7 +144,7 @@ int(sigaction)(int sig, const struct sigaction *act, struct sigaction *oldact) {
sizeof(struct sigaction) > sizeof(struct sigaction_freebsd) &&
sizeof(struct sigaction) > sizeof(struct sigaction_openbsd) &&
sizeof(struct sigaction) > sizeof(struct sigaction_netbsd));
if (IsMetal() || IsUefi()) return enosys(); /* TODO: Signals on Metal */
if (IsMetal()) return enosys(); /* TODO: Signals on Metal */
if (!(0 < sig && sig < NSIG)) return einval();
if (sig == SIGKILL || sig == SIGSTOP) return einval();
if (!act) {

2
libc/calls/writev-serial.c
View file

@ -16,9 +16,9 @@
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "ape/lib/pc.h"
#include "libc/calls/internal.h"
#include "libc/nexgen32e/uart.internal.h"
#include "libc/runtime/pc.internal.h"
ssize_t writev_serial(struct Fd *fd, const struct iovec *iov, int iovlen) {
size_t i, j, wrote = 0;

3
libc/calls/writev.c
View file

@ -39,8 +39,7 @@ ssize_t writev(int fd, const struct iovec *iov, int iovlen) {
if (fd < g_fds.n && g_fds.p[fd].kind == kFdZip) {
return weaken(__zipos_write)(
(struct ZiposHandle *)(intptr_t)g_fds.p[fd].handle, iov, iovlen, -1);
} else if ((SupportsMetal() || SupportsUefi()) && fd < g_fds.n &&
g_fds.p[fd].kind == kFdSerial) {
} else if (SupportsMetal() && fd < g_fds.n && g_fds.p[fd].kind == kFdSerial) {
return writev_serial(&g_fds.p[fd], iov, iovlen);
} else if (!IsWindows()) {
return sys_writev(fd, iov, iovlen);