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Work towards zipos / open(argv[0]) on metal (#667)

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tkchia 2022-11-06 15:29:47 +08:00 • committed by GitHub
parent 543c93f623
commit cb9a0466f1
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17 changed files with 257 additions and 46 deletions
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18
ape/ape.S
View file

@ -35,6 +35,7 @@
#include "ape/macros.internal.h"
#include "ape/notice.inc"
#include "ape/relocations.h"
#include "libc/calls/metalfile.internal.h"
#include "libc/dce.h"
#include "libc/elf/def.h"
#include "libc/macho.internal.h"
@ -1565,19 +1566,19 @@ kernel: movabs $ape_stack_vaddr,%rsp
#endif
push $_HOSTMETAL # sets __hostos in crt.S
pop %rcx
push $0
pushq .Lenv0(%rip) # envp[0][0]
mov %rsp,%rbp
mov .Lenv0(%rip),%rax
mov %rax,(%rbp) # envp[0][0]
push $0 # argv[0][0]
pushq .Largv0+8(%rip) # argv[0][8]
pushq .Largv0(%rip) # argv[0][0]
mov %rsp,%rax
push $0 # auxv[1][1]
push $0 # auxv[1][0]
push %rbp # auxv[0][1]
push %rax # auxv[0][1]
push $31 # auxv[0][0] AT_EXECFN
push $0 # envp[1]
push $.Lenv0 # envp[0]
push %rbp # envp[0]
push $0 # argv[1]
push %rbp # argv[0]
push %rax # argv[0]
push $1 # argc
xor %ebp,%ebp
xor %eax,%eax
@ -1593,6 +1594,9 @@ kernel: movabs $ape_stack_vaddr,%rsp
.rodata
.Lenv0: .asciz "METAL=1"
.Largv0:
.asciz APE_COM_NAME
.org .Largv0+16
.previous
#endif /* SupportsMetal() */

4
ape/ape.lds
View file

@ -565,10 +565,10 @@ SHSTUB2(ape_loader_dd_count,
#if SupportsMetal()
HIDDEN(v_ape_realsectors =
MIN(0x70000 - IMAGE_BASE_REAL,
ROUNDUP(RVA(_edata), 512)) / 512);
ROUNDUP(RVA(_tdata_end), 512)) / 512);
HIDDEN(v_ape_realpages = v_ape_realsectors / (4096 / 512));
HIDDEN(v_ape_highsectors =
(ROUNDUP(RVA(_edata), 512) / 512) - v_ape_realsectors);
(ROUNDUP(RVA(_tdata_end), 512) / 512) - v_ape_realsectors);
TSSDESCSTUB2(_tss, _tss, _tss_end ? _tss_end - _tss - 1 : 0);
#endif

4
ape/sections.internal.h
View file

@ -10,6 +10,10 @@ extern unsigned char _edata[];
extern unsigned char _ezip[];
extern unsigned char _end[];
extern unsigned char _ereal[];
extern unsigned char _tdata_start[];
extern unsigned char _tdata_end[];
extern unsigned char _tbss_start[];
extern unsigned char _tbss_end[];
extern unsigned char __privileged_start[];
extern unsigned char __privileged_addr[];
extern unsigned char __privileged_size[];

10
libc/calls/getfiledescriptorsize.c
View file

@ -18,6 +18,7 @@
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/calls.h"
#include "libc/calls/internal.h"
#include "libc/calls/metalfile.internal.h"
#include "libc/calls/struct/metastat.internal.h"
#include "libc/calls/struct/stat.h"
#include "libc/calls/syscall-sysv.internal.h"
@ -60,7 +61,14 @@ ssize_t getfiledescriptorsize(int fd) {
rc = -1;
}
} else if (IsMetal()) {
rc = -1;
if (fd < 0 || fd >= g_fds.n) {
rc = ebadf();
} else if (g_fds.p[fd].kind != kFdFile) {
rc = eacces();
} else {
struct MetalFile *state = (struct MetalFile *)g_fds.p[fd].handle;
rc = state->size;
}
} else if (!IsWindows()) {
if (!__sys_fstat(fd, &st)) {
rc = METASTAT(st, st_size);

6
libc/calls/getprogramexecutablename.greg.c
View file

@ -17,6 +17,7 @@
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/calls.h"
#include "libc/calls/metalfile.internal.h"
#include "libc/calls/syscall-sysv.internal.h"
#include "libc/dce.h"
#include "libc/errno.h"
@ -76,6 +77,11 @@ static inline void GetProgramExecutableNameImpl(char *p, char *e) {
return;
}
if (IsMetal()) {
if (!memccpy(p, APE_COM_NAME, 0, e - p - 1)) e[-1] = 0;
return;
}
// if argv[0] exists then turn it into an absolute path. we also try
// adding a .com suffix since the ape auto-appends it when resolving
if (__argc && (((q = __argv[0]) && !sys_faccessat(AT_FDCWD, q, F_OK, 0)) ||

75
libc/calls/metalfile.c Normal file
View file

@ -0,0 +1,75 @@
/*-*- 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│
╞══════════════════════════════════════════════════════════════════════════════╡
│ This is free and unencumbered software released into the public domain. │
│ │
│ Anyone is free to copy, modify, publish, use, compile, sell, or │
│ distribute this software, either in source code form or as a compiled │
│ binary, for any purpose, commercial or non-commercial, and by any │
│ means. │
│ │
│ In jurisdictions that recognize copyright laws, the author or authors │
│ of this software dedicate any and all copyright interest in the │
│ software to the public domain. We make this dedication for the benefit │
│ of the public at large and to the detriment of our heirs and │
│ successors. We intend this dedication to be an overt act of │
│ relinquishment in perpetuity of all present and future rights to this │
│ software under copyright law. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, │
│ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF │
│ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. │
│ IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR │
│ OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, │
│ ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR │
│ OTHER DEALINGS IN THE SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "ape/relocations.h"
#include "ape/sections.internal.h"
#include "libc/assert.h"
#include "libc/calls/internal.h"
#include "libc/calls/metalfile.internal.h"
#include "libc/intrin/directmap.internal.h"
#include "libc/intrin/weaken.h"
#include "libc/macros.internal.h"
#include "libc/mem/mem.h"
#include "libc/runtime/pc.internal.h"
#include "libc/runtime/runtime.h"
#include "libc/str/str.h"
#include "libc/sysv/consts/at.h"
#include "libc/sysv/consts/o.h"
#include "libc/sysv/consts/prot.h"
#include "libc/sysv/errfuns.h"
#define MAP_ANONYMOUS_linux 0x00000020
#define MAP_FIXED_linux 0x00000010
#define MAP_SHARED_linux 0x00000001
STATIC_YOINK("_init_metalfile");
void *__ape_com_base;
size_t __ape_com_size = 0;
textstartup void InitializeMetalFile(void) {
if (IsMetal()) {
/*
* Copy out a pristine image of the program — before the program might
* decide to modify its own .data section.
*
* This code is included if a symbol "file:/proc/self/exe" is defined
* (see libc/calls/metalfile.internal.h & libc/calls/metalfile_init.S).
* The zipos code will automatically arrange to do this. Alternatively,
* user code can STATIC_YOINK this symbol.
*/
size_t size = ROUNDUP(_tdata_end - _base, 4096);
void *copied_base;
struct DirectMap dm;
dm = sys_mmap_metal(NULL, size, PROT_READ | PROT_WRITE,
MAP_SHARED_linux | MAP_ANONYMOUS_linux, -1, 0);
copied_base = dm.addr;
_npassert(copied_base != (void *)-1);
memcpy(copied_base, (void *)(BANE + IMAGE_BASE_REAL), size);
__ape_com_base = copied_base;
__ape_com_size = size;
}
}

6
libc/calls/metalfile.internal.h
View file

@ -9,6 +9,12 @@ struct MetalFile {
size_t pos;
};
extern void *__ape_com_base;
extern size_t __ape_com_size;
COSMOPOLITAN_C_END_
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
#define APE_COM_NAME "/proc/self/exe"
#endif /* COSMOPOLITAN_LIBC_CALLS_METALFILE_INTERNAL_H_ */

38
libc/calls/metalfile_init.S Normal file
View file

@ -0,0 +1,38 @@
/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
│vi: set et ft=asm ts=8 tw=8 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ This is free and unencumbered software released into the public domain. │
│ │
│ Anyone is free to copy, modify, publish, use, compile, sell, or │
│ distribute this software, either in source code form or as a compiled │
│ binary, for any purpose, commercial or non-commercial, and by any │
│ means. │
│ │
│ In jurisdictions that recognize copyright laws, the author or authors │
│ of this software dedicate any and all copyright interest in the │
│ software to the public domain. We make this dedication for the benefit │
│ of the public at large and to the detriment of our heirs and │
│ successors. We intend this dedication to be an overt act of │
│ relinquishment in perpetuity of all present and future rights to this │
│ software under copyright law. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, │
│ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF │
│ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. │
│ IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR │
│ OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, │
│ ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR │
│ OTHER DEALINGS IN THE SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/macros.internal.h"
#include "libc/calls/metalfile.internal.h"
.init.start 101,_init_metalfile
push %rdi
push %rsi
call InitializeMetalFile
pop %rsi
pop %rdi
.init.end 101,_init_metalfile
APE_COM_NAME:
.endobj APE_COM_NAME,globl,hidden

4
libc/calls/munmap-metal.c
View file

@ -26,8 +26,8 @@ noasan int sys_munmap_metal(void *addr, size_t size) {
mm = (struct mman *)(BANE + 0x0500);
for (i = 0; i < size; i += 4096) {
e = __get_virtual(mm, __get_pml4t(), (uint64_t)addr + i, false);
if (e) *e = ~PAGE_V;
invlpg(e);
if (e) *e = ~(PAGE_V | PAGE_RSRV);
invlpg((uint64_t)addr + i);
}
return 0;
}

30
libc/calls/openat-metal.c
View file

@ -16,24 +16,46 @@
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "ape/relocations.h"
#include "ape/sections.internal.h"
#include "libc/assert.h"
#include "libc/calls/internal.h"
#include "libc/calls/metalfile.internal.h"
#include "libc/intrin/directmap.internal.h"
#include "libc/intrin/weaken.h"
#include "libc/macros.internal.h"
#include "libc/mem/mem.h"
#include "libc/runtime/pc.internal.h"
#include "libc/runtime/runtime.h"
#include "libc/str/str.h"
#include "libc/sysv/consts/at.h"
#include "libc/sysv/consts/map.h"
#include "libc/sysv/consts/o.h"
#include "libc/sysv/consts/prot.h"
#include "libc/sysv/errfuns.h"
#include "libc/zipos/zipos.internal.h"
int sys_openat_metal(int dirfd, const char *file, int flags, unsigned mode) {
int fd;
struct MetalFile *state;
if (strcmp(file, "ape.com")) return enoent();
if (!_weaken(calloc)) return enomem();
if (dirfd != AT_FDCWD || strcmp(file, APE_COM_NAME)) return enoent();
if (flags != O_RDONLY) return eacces();
if (!_weaken(__ape_com_base) || !_weaken(__ape_com_size))
return eopnotsupp();
if ((fd = __reservefd(-1)) == -1) return -1;
if (!_weaken(calloc) || !_weaken(free)) {
struct DirectMap dm;
dm = sys_mmap_metal(NULL, ROUNDUP(sizeof(struct MetalFile), 4096),
PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS,
-1, 0);
state = dm.addr;
if (state == (void *)-1) return -1;
} else {
state = _weaken(calloc)(1, sizeof(struct MetalFile));
state->base = (char *)_base;
state->size = _end - _base;
if (!state) return -1;
}
state->base = (char *)__ape_com_base;
state->size = __ape_com_size;
g_fds.p[fd].kind = kFdFile;
g_fds.p[fd].flags = flags;
g_fds.p[fd].mode = mode;

53
libc/intrin/directmap-metal.c
View file

@ -18,28 +18,56 @@
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/calls.h"
#include "libc/intrin/directmap.internal.h"
#include "libc/calls/internal.h"
#include "libc/calls/metalfile.internal.h"
#include "libc/macros.internal.h"
#include "libc/runtime/pc.internal.h"
#include "libc/str/str.h"
#include "libc/sysv/consts/map.h"
#include "libc/sysv/consts/prot.h"
#include "libc/sysv/errfuns.h"
#define MAP_ANONYMOUS_linux 0x00000020
#define MAP_FIXED_linux 0x00000010
static uint64_t sys_mmap_metal_break;
noasan struct DirectMap sys_mmap_metal(void *paddr, size_t size, int prot,
noasan static struct DirectMap bad_mmap(void) {
struct DirectMap res;
res.addr = (void *)-1;
res.maphandle = -1;
return res;
}
noasan struct DirectMap sys_mmap_metal(void *vaddr, size_t size, int prot,
int flags, int fd, int64_t off) {
/* asan runtime depends on this function */
size_t i;
struct mman *mm;
struct DirectMap res;
uint64_t addr, page, *pte, *pml4t;
uint64_t addr, faddr = 0, page, *pte, *fdpte, *pml4t;
mm = (struct mman *)(BANE + 0x0500);
pml4t = __get_pml4t();
size = ROUNDUP(size, 4096);
addr = (uint64_t)paddr;
if (!(flags & MAP_FIXED)) {
if (!addr) addr = 4096;
addr = (uint64_t)vaddr;
if (!(flags & MAP_ANONYMOUS_linux)) {
struct Fd *sfd;
struct MetalFile *file;
if (off < 0 || fd < 0 || fd >= g_fds.n) return bad_mmap();
sfd = &g_fds.p[fd];
if (sfd->kind != kFdFile) return bad_mmap();
file = (struct MetalFile *)sfd->handle;
/* TODO: allow mapping partial page at end of file, if file size not
* multiple of page size */
if (off > file->size || size > file->size - off) return bad_mmap();
faddr = (uint64_t)file->base + off;
if (faddr % 4096 != 0) return bad_mmap();
}
if (!(flags & MAP_FIXED_linux)) {
if (!addr) {
addr = 4096;
} else {
addr = ROUNDUP(addr, 4096);
}
for (i = 0; i < size; i += 4096) {
pte = __get_virtual(mm, pml4t, addr + i, false);
if (pte && (*pte & (PAGE_V | PAGE_RSRV))) {
@ -52,7 +80,10 @@ noasan struct DirectMap sys_mmap_metal(void *paddr, size_t size, int prot,
for (i = 0; i < size; i += 4096) {
page = __new_page(mm);
pte = __get_virtual(mm, pml4t, addr + i, true);
if (pte && page) {
if (pte) {
if ((flags & MAP_ANONYMOUS_linux)) {
page = __new_page(mm);
if (!page) return bad_mmap();
__clear_page(BANE + page);
page |= PAGE_RSRV | PAGE_U;
if ((prot & PROT_WRITE))
@ -60,7 +91,15 @@ noasan struct DirectMap sys_mmap_metal(void *paddr, size_t size, int prot,
else if ((prot & (PROT_READ | PROT_EXEC)))
page |= PAGE_V;
if (!(prot & PROT_EXEC)) page |= PAGE_XD;
} else {
fdpte = __get_virtual(mm, pml4t, faddr + i, false);
page = *fdpte;
page |= PAGE_RSRV | PAGE_U;
if (!(prot & PROT_WRITE)) page &= ~PAGE_RW;
if (!(prot & PROT_EXEC)) page |= PAGE_XD;
}
*pte = page;
invlpg(addr + i);
} else {
addr = -1;
break;

2
libc/runtime/mman.internal.h
View file

@ -40,7 +40,7 @@ struct mman {
COSMOPOLITAN_C_END_
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
/* Values for mman::pc_video_type. TODO: implement graphics modes. */
/* Values for mman::pc_video_type. */
#define PC_VIDEO_TEXT 0
#define PC_VIDEO_BGR565 1
#define PC_VIDEO_BGR555 2

12
libc/runtime/pc.internal.h
View file

@ -145,13 +145,13 @@
│ (If this maps 2MB/1GB page and CR4.PGE) Global┐││││││││
│ (If IsPage 2MB/1GB, see Intel V3A § 11.12) PAT │││││││││
│ │ │││││││││
│ ┌────────────────────────────────────┤ │││││││││
│ ┌─────────────────────────────────────┤ │││││││││
│ Must Be 0┐│ Next Page Table Address (!IsPage) │ │││││││││
│ │├────────────────────────────────────┤ │││││││││
│ │├─────────────────────────────────────┤ │││││││││
│ ││ Physical Address 4KB │ │││││││││
│┌───┐┌─────┐│├───────────────────────────┐ │ign│││││││││
││PKE││ ign │││ Physical Address 2MB │ │┌┴┐│││││││││
││ ││ ││├──────────────────┐ │ ││ ││││││││││
│┌──┐┌─────┐│├────────────────────────────┐ │ign│││││││││
││PK││ ign │││ Physical Address 2MB │ │┌┴┐│││││││││
││ ││ ││├───────────────────┐ │ ││ ││││││││││
││ ││ │││ Phys. Addr. 1GB │ │ ││ ││││││││││
││ ││ │││ │ │ ││ ││││││││││
6666555555555544444444443333333333222222222211111111110000000000
@ -163,7 +163,7 @@
#define PAGE_2MB /* */ 0b000110000000
#define PAGE_1GB /* */ 0b000110000000
#define PAGE_IGN1 /* */ 0b111000000000
#define PAGE_RSRV /* blinkenlights reservation */ 0b001000000000
#define PAGE_RSRV /* blinkenlights/libc reservation */ 0b001000000000
#define PAGE_GROD /* blinkenlights MAP_GROWSDOWN */ 0b010000000000
#define PAGE_TA 0x00007ffffffff000
#define PAGE_PA2 0x00007fffffe00000

10
libc/str/getzipcdir.c
View file

@ -41,6 +41,7 @@ void *GetZipCdir(const uint8_t *p, size_t n) {
size_t i, j;
v8hi pk = {READ16LE("PK"), READ16LE("PK"), READ16LE("PK"), READ16LE("PK"),
READ16LE("PK"), READ16LE("PK"), READ16LE("PK"), READ16LE("PK")};
uint32_t magic;
i = n - 4;
asm("" : "+x"(pk));
do {
@ -54,11 +55,14 @@ void *GetZipCdir(const uint8_t *p, size_t n) {
continue;
}
}
if (READ32LE(p + i) == kZipCdir64LocatorMagic &&
while (magic = READ32LE(p + i),
magic != kZipCdir64LocatorMagic && magic != kZipCdirHdrMagic &&
i + 0x10000 + 0x1000 >= n) --i;
if (magic == kZipCdir64LocatorMagic &&
i + kZipCdir64LocatorSize <= n &&
IsZipCdir64(p, n, ZIP_LOCATE64_OFFSET(p + i))) {
return p + ZIP_LOCATE64_OFFSET(p + i);
} else if (READ32LE(p + i) == kZipCdirHdrMagic && IsZipCdir32(p, n, i)) {
} else if (magic == kZipCdirHdrMagic && IsZipCdir32(p, n, i)) {
j = i;
do {
if (READ32LE(p + j) == kZipCdir64LocatorMagic &&
@ -69,6 +73,6 @@ void *GetZipCdir(const uint8_t *p, size_t n) {
} while (j-- && i - j < 128);
return p + i;
}
} while (i--);
} while (i-- + 0x10000 + 0x1000 >= n);
return 0;
}

2
libc/vga/rlinit-vesa.S
View file

@ -629,3 +629,5 @@ str.mode_list_start:
.byte PC_VIDEO_BGRX8888,32, 8,16, 8, 8, 8, 0
.endobj .type_list
.type_list_end:
.previous

3
libc/zipos/get.c
View file

@ -17,6 +17,7 @@
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/calls.h"
#include "libc/calls/metalfile.internal.h"
#include "libc/intrin/cmpxchg.h"
#include "libc/intrin/promises.internal.h"
#include "libc/intrin/strace.internal.h"
@ -29,6 +30,8 @@
#include "libc/zip.h"
#include "libc/zipos/zipos.internal.h"
STATIC_YOINK(APE_COM_NAME);
static uint64_t __zipos_get_min_offset(const uint8_t *base,
const uint8_t *cdir) {
uint64_t i, n, c, r, o;

2
libc/zipos/open.c
View file

@ -165,7 +165,7 @@ static int __zipos_load(struct Zipos *zipos, size_t cf, unsigned flags,
minfd = 3;
__fds_lock();
TryAgain:
if (IsWindows()) {
if (IsWindows() || IsMetal()) {
if ((fd = __reservefd_unlocked(-1)) != -1) {
return __zipos_setfd(fd, h, flags, mode);
}