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cosmopolitan/libc/sysv/restorert.S

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Polish up repository and other revisions
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/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
flip et / noet in modelines `et` means `expandtab`. ```sh rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\) et\(.*\) :vi/vi: \1 xoet\2:vi/' rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\)noet\(.*\):vi/vi: \1et\2 :vi/' rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\)xoet\(.*\):vi/vi: \1noet\2:vi/' ```
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│ vi: set noet ft=asm ts=8 sw=8 fenc=utf-8 :vi │
Initial import
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╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney │
│ │
Change license
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│ 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. │
Initial import
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│ │
Change license
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│ 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. │
Initial import
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╚─────────────────────────────────────────────────────────────────────────────*/
Improve pledge() usability and consistency - We now kill the program on violations like OpenBSD - We now print a message explaining which promise is needed - This change also fixes a linkage bug with thread local storage - Your sigaction() handlers should now be more thread safe A new `__pledge_mode` global has been introduced to make pledge() more customizable on Linux. For example: __attribute__((__constructor__)) static void init(void) { __pledge_mode = SECCOMP_RET_ERRNO | EPERM; } Can be used to restore our old permissive pledge() behavior.
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#include "libc/sysv/consts/nrlinux.h"
Remove .internal from more header filenames
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#include "libc/macros.h"
Elevate .text.syscall to .privileged It turns out adding OpenBSD msyscall() origin verification broke the --ftrace flag. The executable needs to issue raw syscalls while it's rewriting itself. So they need to be in the same section, and that's just plain simpler too.
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.privileged
Initial import
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Get codebase completely working with LLVM You can now build Cosmopolitan with Clang: make -j8 MODE=llvm o/llvm/examples/hello.com The assembler and linker code is now friendly to LLVM too. So it's not needed to configure Clang to use binutils under the hood. If you love LLVM then you can now use pure LLVM.
2021-02-08 09:19:00 -08:00
// Linux Signal Trampoline (HOLY CODE)
Make numerous improvements - Python static hello world now 1.8mb - Python static fully loaded now 10mb - Python HTTPS client now uses MbedTLS - Python REPL now completes import stmts - Increase stack size for Python for now - Begin synthesizing posixpath and ntpath - Restore Python \N{UNICODE NAME} support - Restore Python NFKD symbol normalization - Add optimized code path for Intel SHA-NI - Get more Python unit tests passing faster - Get Python help() pagination working on NT - Python hashlib now supports MbedTLS PBKDF2 - Make memcpy/memmove/memcmp/bcmp/etc. faster - Add Mersenne Twister and Vigna to LIBC_RAND - Provide privileged __printf() for error code - Fix zipos opendir() so that it reports ENOTDIR - Add basic chmod() implementation for Windows NT - Add Cosmo's best functions to Python cosmo module - Pin function trace indent depth to that of caller - Show memory diagram on invalid access in MODE=dbg - Differentiate stack overflow on crash in MODE=dbg - Add stb_truetype and tools for analyzing font files - Upgrade to UNICODE 13 and reduce its binary footprint - COMPILE.COM now logs resource usage of build commands - Start implementing basic poll() support on bare metal - Set getauxval(AT_EXECFN) to GetModuleFileName() on NT - Add descriptions to strerror() in non-TINY build modes - Add COUNTBRANCH() macro to help with micro-optimizations - Make error / backtrace / asan / memory code more unbreakable - Add fast perfect C implementation of μ-Law and a-Law audio codecs - Make strtol() functions consistent with other libc implementations - Improve Linenoise implementation (see also github.com/jart/bestline) - COMPILE.COM now suppresses stdout/stderr of successful build commands
2021-09-27 22:58:51 -07:00
__restore_bt:
nop
.endfn __restore_bt,globl,hidden
Get LIBC_RUNTIME and LIBC_CALLS building on aarch64
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nop // gap so that __get_symbol(st, addr - 1) fails
Make progress towards aarch64 build
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.balign 16
Get LIBC_RUNTIME and LIBC_CALLS building on aarch64
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__restore_rt: // @see gdb/amd64-linux-tdep.c
#ifdef __x86_64__
mov $__NR_linux_sigreturn,%rax // [sic]
Initial import
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syscall
Get LIBC_RUNTIME and LIBC_CALLS building on aarch64
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#elif defined(__aarch64__)
mov x8,#139 // __NR_rt_sigreturn
svc #0
#elif defined(__powerpc64__)
li 0,172 // __NR_rt_sigreturn
sc
#endif /* __x86_64__ */
Make progress towards aarch64 build
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.balign 16
Initial import
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.endfn __restore_rt,globl,hidden
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