mirror of
https://github.com/jart/cosmopolitan.git
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1ff9ab95ac
This change enables Address Sanitizer systemically w/ `make MODE=dbg`. Our version of Rust's `unsafe` keyword is named `noasan` which is used for two functions that do aligned memory chunking, like `strcpy.c` and we need to fix the tiny DEFLATE code, but that's it everything else is fabulous you can have all the fischer price security blankets you need Best of all is we're now able to use the ASAN data in Blinkenlights to colorize the memory dumps. See the screenshot below of a test program: https://justine.lol/blinkenlights/asan.png Which is operating on float arrays stored on the stack, with red areas indicating poisoned memory, and the green areas indicate valid memory.
253 lines
6.4 KiB
ArmAsm
253 lines
6.4 KiB
ArmAsm
/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
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│vi: set et ft=asm ts=8 tw=8 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/macros.h"
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.source __FILE__
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/ @fileoverview Address Sanitizer Thunks
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/
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/ This has tiny code size and reduces API surface area
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/ since ASAN has the same stylistic hugeness as UBSAN.
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/ We also guard all the functions, against reentrancy.
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__asan_report_load1:
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push $1
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jmp OnReportLoad
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.endfn __asan_report_load1,globl
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__asan_report_load2:
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push $2
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jmp OnReportLoad
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.endfn __asan_report_load2,globl
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__asan_report_load4:
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push $4
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jmp OnReportLoad
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.endfn __asan_report_load4,globl
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__asan_report_load8:
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push $8
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jmp OnReportLoad
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.endfn __asan_report_load8,globl
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__asan_report_load16:
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push $16
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/ 𝑠𝑙𝑖𝑑𝑒
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.endfn __asan_report_load16,globl
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OnReportLoad:
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pop %rsi
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/ 𝑠𝑙𝑖𝑑𝑒
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.endfn OnReportLoad
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__asan_report_load_n:
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lea __asan_report_load_impl(%rip),%r11
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jmp __asan_report_noreentry
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.endfn __asan_report_load_n,globl
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__asan_report_store1:
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push $1
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jmp ReportStore
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.endfn __asan_report_store1,globl
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__asan_report_store2:
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push $2
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jmp ReportStore
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.endfn __asan_report_store2,globl
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__asan_report_store4:
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push $4
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jmp ReportStore
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.endfn __asan_report_store4,globl
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__asan_report_store8:
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push $8
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jmp ReportStore
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.endfn __asan_report_store8,globl
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__asan_report_store16:
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push $16
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jmp ReportStore
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.endfn __asan_report_store16,globl
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__asan_report_store32:
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push $32
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/ 𝑠𝑙𝑖𝑑𝑒
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.endfn __asan_report_store32,globl
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ReportStore:
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pop %rsi
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/ 𝑠𝑙𝑖𝑑𝑒
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.endfn ReportStore
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__asan_report_store_n:
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lea __asan_report_store_impl(%rip),%r11
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/ 𝑠𝑙𝑖𝑑𝑒
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.endfn __asan_report_store_n,globl
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__asan_report_noreentry:
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push %rbp
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mov %rsp,%rbp
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xor %eax,%eax
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mov $1,%r10b
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cmpxchg %r10b,__asan_noreentry(%rip)
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jnz 2f
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call *%r11
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decb __asan_noreentry(%rip)
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2: pop %rbp
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ret
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.endfn __asan_report_noreentry
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__asan_stack_free_0:
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push $0
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jmp OnStackFree
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.endfn __asan_stack_free_0,globl
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__asan_stack_free_1:
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push $1
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jmp OnStackFree
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.endfn __asan_stack_free_1,globl
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__asan_stack_free_2:
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push $2
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jmp OnStackFree
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.endfn __asan_stack_free_2,globl
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__asan_stack_free_3:
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push $3
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jmp OnStackFree
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.endfn __asan_stack_free_3,globl
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__asan_stack_free_4:
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push $4
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jmp OnStackFree
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.endfn __asan_stack_free_4,globl
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__asan_stack_free_5:
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push $5
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jmp OnStackFree
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.endfn __asan_stack_free_5,globl
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__asan_stack_free_6:
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push $6
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jmp OnStackFree
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.endfn __asan_stack_free_6,globl
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__asan_stack_free_7:
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push $7
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jmp OnStackFree
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.endfn __asan_stack_free_7,globl
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__asan_stack_free_8:
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push $8
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jmp OnStackFree
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.endfn __asan_stack_free_8,globl
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__asan_stack_free_9:
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push $9
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jmp OnStackFree
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.endfn __asan_stack_free_9,globl
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__asan_stack_free_10:
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push $10
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/ 𝑠𝑙𝑖𝑑𝑒
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.endfn __asan_stack_free_10,globl
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OnStackFree:
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pop %rdx
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jmp __asan_stack_free
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.endfn OnStackFree
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__asan_stack_malloc_0:
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push $0
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jmp OnStackMalloc
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.endfn __asan_stack_malloc_0,globl
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__asan_stack_malloc_1:
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push $1
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jmp OnStackMalloc
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.endfn __asan_stack_malloc_1,globl
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__asan_stack_malloc_2:
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push $2
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jmp OnStackMalloc
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.endfn __asan_stack_malloc_2,globl
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__asan_stack_malloc_3:
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push $3
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jmp OnStackMalloc
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.endfn __asan_stack_malloc_3,globl
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__asan_stack_malloc_4:
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push $4
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jmp OnStackMalloc
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.endfn __asan_stack_malloc_4,globl
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__asan_stack_malloc_5:
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push $5
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jmp OnStackMalloc
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.endfn __asan_stack_malloc_5,globl
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__asan_stack_malloc_6:
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push $6
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jmp OnStackMalloc
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.endfn __asan_stack_malloc_6,globl
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__asan_stack_malloc_7:
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push $7
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jmp OnStackMalloc
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.endfn __asan_stack_malloc_7,globl
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__asan_stack_malloc_8:
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push $8
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jmp OnStackMalloc
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.endfn __asan_stack_malloc_8,globl
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__asan_stack_malloc_9:
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push $9
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jmp OnStackMalloc
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.endfn __asan_stack_malloc_9,globl
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__asan_stack_malloc_10:
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push $10
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/ 𝑠𝑙𝑖𝑑𝑒
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.endfn __asan_stack_malloc_10,globl
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OnStackMalloc:
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pop %rsi
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jmp __asan_stack_malloc
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.endfn OnStackMalloc
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__asan_handle_no_return:
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push %rbp
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mov %rsp,%rbp
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lea 8(%rsp),%rdi
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call __asan_handle_no_return_impl
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pop %rbp
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ret
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.endfn __asan_handle_no_return,globl
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__asan_before_dynamic_init:
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push %rbp
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mov %rsp,%rbp
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ud2
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pop %rbp
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ret
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.endfn __asan_before_dynamic_init,globl
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__asan_after_dynamic_init:
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push %rbp
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mov %rsp,%rbp
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ud2
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pop %rbp
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ret
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.endfn __asan_after_dynamic_init,globl
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__asan_version_mismatch_check_v8:
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ret
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.endfn __asan_version_mismatch_check_v8,globl
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/ Initializes Address Sanitizer runtime earlier if linked.
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.init.start 301,_init_asan
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push %rdi
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push %rsi
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mov %r12,%rdi
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mov %r13,%rsi
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mov %r14,%rdx
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mov %r15,%rcx
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call __asan_init
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pop %rsi
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pop %rdi
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.init.end 301,_init_asan
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.rodata.cst4
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__asan_option_detect_stack_use_after_return:
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.long 0
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.endobj __asan_option_detect_stack_use_after_return,globl
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.previous
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.bss
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__asan_noreentry:
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.byte 0
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.endobj __asan_noreentry
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.previous
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