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Delete more dead code

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Justine Tunney 2023-07-06 09:07:42 -07:00
parent 0a24b4fc3c
commit 00acd81b2f
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GPG key ID: BE714B4575D6E328
63 changed files with 75 additions and 1220 deletions
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2
libc/intrin/asan.c
View file

@ -29,7 +29,6 @@
#include "libc/intrin/leaky.internal.h"
#include "libc/intrin/likely.h"
#include "libc/intrin/strace.internal.h"
#include "libc/intrin/tpenc.h"
#include "libc/intrin/weaken.h"
#include "libc/log/libfatal.internal.h"
#include "libc/log/log.h"
@ -43,6 +42,7 @@
#include "libc/runtime/runtime.h"
#include "libc/runtime/symbols.internal.h"
#include "libc/stdckdint.h"
#include "libc/str/str.h"
#include "libc/str/tab.internal.h"
#include "libc/sysv/consts/auxv.h"
#include "libc/sysv/consts/map.h"

47
libc/intrin/fsgsbase.h
View file

@ -1,47 +0,0 @@
#ifndef COSMOPOLITAN_LIBC_RUNTIME_FSGSBASE_H_
#define COSMOPOLITAN_LIBC_RUNTIME_FSGSBASE_H_
#if !(__ASSEMBLER__ + __LINKER__ + 0)
COSMOPOLITAN_C_START_
void *_rdfsbase(void);
void *_rdgsbase(void);
void *_wrfsbase(void *);
void *_wrgsbase(void *);
int _have_fsgsbase(void);
#if defined(__GNUC__) && !defined(__STRICT_ANSI__) && defined(__x86_64__)
#define _rdfsbase() \
({ \
void *_p; \
asm("rdfsbase\t%0" : "=r"(_p)); \
_p; \
})
#define _rdgsbase() \
({ \
void *_p; \
asm("rdgsbase\t%0" : "=r"(_p)); \
_p; \
})
#define _wrfsbase(p) \
({ \
void *_p = p; \
asm volatile("wrfsbase\t%0" \
: /* no outputs */ \
: "r"(_p) \
: "memory"); \
_p; \
})
#define _wrgsbase(p) \
({ \
void *_p = p; \
asm volatile("wrgsbase\t%0" \
: /* no outputs */ \
: "r"(_p) \
: "memory"); \
_p; \
})
#endif /* GNUC && !ANSI */
COSMOPOLITAN_C_END_
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
#endif /* COSMOPOLITAN_LIBC_RUNTIME_FSGSBASE_H_ */

66
libc/intrin/have_fsgsbase.c
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@ -1,66 +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 2022 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/dce.h"
#include "libc/errno.h"
#include "libc/intrin/fsgsbase.h"
#include "libc/nexgen32e/x86feature.h"
#ifdef __x86_64__
/**
* Returns true if FSGSBASE ISA can be used.
*
* If this function returns true (Linux 5.9+ or FreeBSD) then you should
* be able to read/write to the %gs / %fs x86 segment registers in about
* one or two clock cycles which gives you a free addition operation for
* all assembly ops that reference memory.
*
* The FSGSBASE ISA was introduced by Intel with Ivybridge (c. 2012) but
* the Linux Kernel didn't authorize us to use it until 2020, once Intel
* had to start backdooring customer kernels so that they could have it.
* AMD introduced support for the FSGSBASE ISA in Excavator, aka bdver4.
*
* @return boolean indicating if feature can be used
* @see _rdfsbase()
* @see _rdgsbase()
* @see _wrfsbase()
* @see _wrgsbase()
*/
privileged int _have_fsgsbase(void) {
// Linux 5.9 (c. 2020) introduced close_range() and fsgsbase support.
// it's cheaper to test for close_range() than handle an op crashing.
// Windows lets us use these instructions but they don't really work.
int ax;
if (X86_HAVE(FSGSBASE)) {
if (IsLinux()) {
asm volatile("syscall"
: "=a"(ax)
: "0"(436 /* close_range */), "D"(-1), "S"(-2), "d"(0)
: "rcx", "r11", "memory");
return ax == -22; // EINVAL
} else if (IsFreebsd()) {
return 1;
} else {
return 0;
}
} else {
return 0;
}
}
#endif /* __x86_64__ */

31
libc/intrin/rdfsbase.c
View file

@ -1,31 +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 2022 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/intrin/fsgsbase.h"
#ifdef __x86_64__
/**
* Reads `%fs` base address.
*
* @see _have_fsgsbase()
*/
void *(_rdfsbase)(void) {
return _rdfsbase();
}
#endif /* __x86_64__ */

31
libc/intrin/rdgsbase.c
View file

@ -1,31 +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 2022 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/intrin/fsgsbase.h"
#ifdef __x86_64__
/**
* Reads `%gs` base address.
*
* @see _have_fsgsbase()
*/
void *(_rdgsbase)(void) {
return _rdgsbase();
}
#endif /* __x86_64__ */

68
libc/intrin/tpenc.S
View file

@ -1,68 +0,0 @@
/*-*- 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│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 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/macros.internal.h"
// Encodes Thompson-Pike varint.
//
// @param edi is int to encode
// @return rax is word-encoded byte buffer
// @note invented on a napkin in a new jersey diner
.ftrace1
_tpenc: .ftrace2
.leafprologue
mov %edi,%edi
xor %eax,%eax
cmp $127,%edi
jbe 3f
bsr %edi,%ecx
mov kTpenc-7*(1+1)(,%rcx,2),%ecx
1: mov %edi,%edx
shr $6,%edi
and $0b00111111,%dl
or $0b10000000,%al
or %dl,%al
shl $8,%rax
dec %cl
jnz 1b
2: or %ch,%al
3: or %rdi,%rax
.leafepilogue
.endfn _tpenc,globl
.rodata
.balign 4
.underrun
kTpenc: .rept 4 // MSB≤10 (0x7FF)
.byte 1,0b11000000 // len,mark
.endr
.rept 5 // MSB≤15 (0xFFFF)
.byte 2,0b11100000 // len,mark
.endr
.rept 5 // MSB≤20 (0x1FFFFF)
.byte 3,0b11110000 // len,mark
.endr
.rept 5 // MSB≤25 (0x3FFFFFF)
.byte 4,0b11111000 // len,mark
.endr
.rept 6 // MSB≤31 (0xffffffff)
.byte 5,0b11111100 // len,mark
.endr
.zero 2
.endobj kTpenc
.overrun

6
libc/intrin/tpenc2.c → libc/intrin/tpenc.c
View file

@ -17,7 +17,6 @@
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/intrin/bsr.h"
#ifndef __x86_64__
static const uint16_t kTpEnc[32 - 7] = {
1 | 0300 << 8, 1 | 0300 << 8, 1 | 0300 << 8, 1 | 0300 << 8, 2 | 0340 << 8,
@ -27,6 +26,9 @@ static const uint16_t kTpEnc[32 - 7] = {
5 | 0374 << 8, 5 | 0374 << 8, 5 | 0374 << 8, 5 | 0374 << 8, 5 | 0374 << 8,
};
/**
* Encodes Thompson-Pike variable-length integer.
*/
uint64_t _tpenc(uint32_t c) {
int e, n;
uint64_t w;
@ -41,5 +43,3 @@ uint64_t _tpenc(uint32_t c) {
} while (--n);
return c | w | e >> 8;
}
#endif /* __x86_64__ */

23
libc/intrin/tpenc.h
View file

@ -1,23 +0,0 @@
#ifndef COSMOPOLITAN_LIBC_STR_TPENC_H_
#define COSMOPOLITAN_LIBC_STR_TPENC_H_
#if !(__ASSEMBLER__ + __LINKER__ + 0)
COSMOPOLITAN_C_START_
uint64_t _tpenc(uint32_t) pureconst;
#if defined(__x86_64__) && defined(__MNO_RED_ZONE__) && defined(__GNUC__) && \
!defined(__STRICT_ANSI__)
#define _tpenc(CODE) \
({ \
long Edi, Buf; \
asm("call\t_tpenc" \
: "=a"(Buf), "=D"(Edi) \
: "1"((int)(CODE)) \
: "rcx", "rdx", "cc"); \
Buf; \
})
#endif
COSMOPOLITAN_C_END_
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
#endif /* COSMOPOLITAN_LIBC_STR_TPENC_H_ */

31
libc/intrin/wrfsbase.c
View file

@ -1,31 +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 2022 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/intrin/fsgsbase.h"
#ifdef __x86_64__
/**
* Changes `%fs` base address.
*
* @see _have_fsgsbase()
*/
void *(_wrfsbase)(void *p) {
return _wrfsbase(p);
}
#endif /* __x86_64__ */

28
libc/intrin/wrgsbase.c
View file

@ -1,28 +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 2022 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/intrin/fsgsbase.h"
/**
* Changes `%gs` base address.
*
* @see _have_fsgsbase()
*/
void *(_wrgsbase)(void *p) {
return _wrgsbase(p);
}

3
libc/intrin/wsarecv.c
View file

@ -65,6 +65,9 @@ textwindows int WSARecv(
rc = __imp_WSARecv(s, inout_lpBuffers, dwBufferCount,
opt_out_lpNumberOfBytesRecvd, inout_lpFlags,
opt_inout_lpOverlapped, opt_lpCompletionRoutine);
if (rc == -1) {
__winerr();
}
#endif
return rc;
}

3
libc/intrin/wsarecvfrom.c
View file

@ -69,6 +69,9 @@ textwindows int WSARecvFrom(
opt_out_lpNumberOfBytesRecvd, inout_lpFlags,
opt_out_fromsockaddr, opt_inout_fromsockaddrlen,
opt_inout_lpOverlapped, opt_lpCompletionRoutine);
if (rc == -1) {
__winerr();
}
#endif
return rc;
}