mirror of
https://github.com/jart/cosmopolitan.git
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957c61cbbf
This change upgrades to GCC 12.3 and GNU binutils 2.42. The GNU linker appears to have changed things so that only a single de-duplicated str table is present in the binary, and it gets placed wherever the linker wants, regardless of what the linker script says. To cope with that we need to stop using .ident to embed licenses. As such, this change does significant work to revamp how third party licenses are defined in the codebase, using `.section .notice,"aR",@progbits`. This new GCC 12.3 toolchain has support for GNU indirect functions. It lets us support __target_clones__ for the first time. This is used for optimizing the performance of libc string functions such as strlen and friends so far on x86, by ensuring AVX systems favor a second codepath that uses VEX encoding. It shaves some latency off certain operations. It's a useful feature to have for scientific computing for the reasons explained by the test/libcxx/openmp_test.cc example which compiles for fifteen different microarchitectures. Thanks to the upgrades, it's now also possible to use newer instruction sets, such as AVX512FP16, VNNI. Cosmo now uses the %gs register on x86 by default for TLS. Doing it is helpful for any program that links `cosmo_dlopen()`. Such programs had to recompile their binaries at startup to change the TLS instructions. That's not great, since it means every page in the executable needs to be faulted. The work of rewriting TLS-related x86 opcodes, is moved to fixupobj.com instead. This is great news for MacOS x86 users, since we previously needed to morph the binary every time for that platform but now that's no longer necessary. The only platforms where we need fixup of TLS x86 opcodes at runtime are now Windows, OpenBSD, and NetBSD. On Windows we morph TLS to point deeper into the TIB, based on a TlsAlloc assignment, and on OpenBSD/NetBSD we morph %gs back into %fs since the kernels do not allow us to specify a value for the %gs register. OpenBSD users are now required to use APE Loader to run Cosmo binaries and assimilation is no longer possible. OpenBSD kernel needs to change to allow programs to specify a value for the %gs register, or it needs to stop marking executable pages loaded by the kernel as mimmutable(). This release fixes __constructor__, .ctor, .init_array, and lastly the .preinit_array so they behave the exact same way as glibc. We no longer use hex constants to define math.h symbols like M_PI.
346 lines
9.2 KiB
EmacsLisp
346 lines
9.2 KiB
EmacsLisp
;; ╔──────────────────────────────────────────────────────────────────╗
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;; │ To the extent possible under law, Justine Tunney has waived │
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;; │ all copyright and related or neighboring rights to this file, │
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;; │ as it is written in the following disclaimers: │
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;; │ • http://unlicense.org/ │
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;; │ • http://creativecommons.org/publicdomain/zero/1.0/ │
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;; ╚──────────────────────────────────────────────────────────────────╝
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;; Reconfigures GNU Emacs syntax highlighting for GNU Assembler syntax.
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(require 'asm-mode)
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(require 'cosmo-cpp-constants)
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(defun cosmo-regexpify (x)
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(let ((join (lambda (sep lis)
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(mapconcat 'identity lis sep))))
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(cond ((vectorp x)
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(funcall join "" (mapcar 'cosmo-regexpify x)))
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((listp x)
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(concat "\\(?:"
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(funcall join "\\|" (mapcar 'cosmo-regexpify x))
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"\\)"))
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('t x))))
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(defun cosmo-fontify (faces regexp limit predicate)
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"Set FACES on REGEXP matches until LIMIT that satisfy PREDICATE."
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(while (re-search-forward regexp limit t)
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(let (i (face (save-excursion
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(backward-char)
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(face-at-point)))
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(syntax (syntax-ppss)))
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(when (funcall predicate face syntax)
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(dolist (i faces)
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(put-text-property (match-beginning (car i))
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(match-end (car i))
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'face
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(cdr i)))))))
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(defconst asm-mode-gas-qualifiers-regexp
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(cosmo-regexpify
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[("comdat"
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":req"
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":vararg"
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["@" (;; calculates offset relative to tls block end
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;; load: mov %fs:boop@tpoff,%eax
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;; addr: mov %fs:0,%rax
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;; lea x1@tpoff(%rax),%rax
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;; addr: mov %fs:0,%rax
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;; add $x1@tpoff,%rax
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"tpoff"
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;; allocates TLS_index structure
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;; lea x@tlsgd(,%rbx,1),%rdi
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;; call __tls_get_addr@plt
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"tlsgd"
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"tlsld"
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"dtpmod"
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"dtpoff"
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"gottpoff"
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"function"
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"object"
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"notype"
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"got"
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"size"
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"gotoff"
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"plt"
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"pltoff"
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"gotpcrel"
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"progbits"
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"note"
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"nobits"
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"init_array"
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"fini_array"
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"gnu_indirect_function")])
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"\\>"])
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"GNU Assembler section, relocation, macro param qualifiers.")
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(defconst asm-mode-doctag-regexp
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(cosmo-regexpify
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'(["<"
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("p" "br"
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"b" "/b"
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"i" "/i"
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"pre" "/pre"
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"h3" "h4" "/h3" "/h4"
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"ul" "ol" "li" "/ol" "/ul"
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"dl" "dt" "dd" "/dl"
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"table" "tr" "td" "th" "td" "/table")
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">"]
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["@"
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("param"
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"return"
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"define"
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"see"
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"throws"
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"returnstwice"
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"fileoverview"
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"nullable"
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"noreturn"
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"domain"
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"clob"
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"since"
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"forcealignargpointer"
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"mode"
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"speed"
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"cost"
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"todo"
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"assume"
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"define"
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"domain"
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"code"
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"note"
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"protip"
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"nxbitsafe"
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"vforksafe"
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"threadsafe"
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"preinitsafe"
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"asyncsignalsafe"
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"notasyncsignalsafe"
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"isa"
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"norestart"
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"mayalias"
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"sideffect")
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"\\>"]))
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"Assembly docstring highlighting in Google Java Style.")
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(defconst asm-mode-x86-prefix-ops-regexp
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(cosmo-regexpify
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[(["[lL][oO][cC][kK]\\>[ \t]*"
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("[mM][oO][vV][sS]"
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"[aA][dD][dDcC]"
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"[sS][uUbB][bB]"
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"[oO][rR]"
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"[aA][nN][dD]"
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"[xX][oO][rR]"
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"[nN][oO][tT]"
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"[nN][eE][gG]"
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"[iI][nN][cC]"
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"[dD][eE][cC]"
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"[bB][tT][sSrRcC]?"
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"[xX][aA][dD][dD]"
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"[xX][cC][hH][gG]"
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["[cC][mM][pP][xX][cC][hH][gG]" ("8[bB]" "16[bB]") "?"])]
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["[rR][eE][pP]" ("[eEzZ]" "[nN][eEzZ]") "?\\>[ \t]*"
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("[mM][oO][vV][sS]"
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"[sS][tT][oO][sS]"
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"[sS][cC][aA][sS]"
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"[cC][mM][pP][sS]"
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"[nN][oO][pP]"
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"[rR][eE][tT]"
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"[iI][nN][sS]"
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"[oO][uU][tT][sS]")])
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"[bBwWlLqQ]?\\>"])
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"Legal high-level 80x86 prefix instruction combinations.")
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(defconst cosmo-asm-font-lock-keywords
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(append
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`(;; AT&T Fortran-Style Assembler Comment
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;;
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;; - Valid
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;;
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;; * /heyho
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;; * //heyho
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;;
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;; - Ignored
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;;
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;; * /heyho
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;; * code code //heyho
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;;
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("^/.*$" . font-lock-comment-face)
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;; Immediate Argument
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;;
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;; - Valid
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;;
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;; * mov $2,%eax
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;; * mov $~2+0x2ul,%eax
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;; * mov $'c,%eax
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;; * mov $'\n,%eax
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;;
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("[ \t,]\\$\\(\\(?:'\\(?:'\\|\\s\"\\|\\s\\.\\|.\\)\\|\\(?:0x[[:xdigit:]]+\\|0b[01]+\\|[1-9][0-9]*\\|0[0-7]*\\)\\(?:[fb]\\|u?l?l?\\)\\|[-*/&^|()%<>~+]\\|[_.$[:alpha:]][-_.[:alnum:]]*\\)+\\)"
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1 font-lock-constant-face)
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(cosmo-asm-doctag-keywords)
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;; Static Branch Prediction
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;;
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;; - Valid
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;;
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;; * jnz,pt 1f
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;; * jnz,pn 1b
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;;
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;; - Traditionally Implied
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;;
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;; * jnz,pn 1f
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;; * jnz,pt 1b
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;;
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(",p[tn]" . font-lock-keyword-face)
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("\\\\\\(?:@\\|()\\)" . font-lock-function-name-face)
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("\\\\\\(\\sw\\|_\\|\\.\\)+\\>" . font-lock-variable-name-face)
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(,asm-mode-x86-prefix-ops-regexp . font-lock-keyword-face)
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(,(concat "^\\(\\(?:\\sw\\|\\s_\\|\\.\\)+\\):[ \t]*"
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"\\(\\(?:\\sw\\|\\.\\)+\\)?")
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(1 font-lock-function-name-face)
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(2 font-lock-keyword-face nil t))
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("^\\((\\sw+)\\)?\\s +\\(\\(\\.?\\sw\\|\\s_\\)+\\(\\.\\sw+\\)*\\)"
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2 font-lock-keyword-face)
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("^\\(\\.\\(\\sw\\|\\s_\\|\\.\\)+\\)\\>[^:]?"
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1 font-lock-keyword-face)
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("^.*?\\*/\\(\\.\\(\\sw\\|\\s_\\|\\.\\)+\\)\\>[^:]?"
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1 font-lock-keyword-face)
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;; it's complicated
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(,asm-mode-gas-qualifiers-regexp . font-lock-type-face))
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cpp-font-lock-keywords
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`(("'\\(\\\\?.\\)\\>" 1 font-lock-constant-face)
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;; Register Value
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;;
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;; - Valid
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;;
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;; * %al
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;; * %eax
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;;
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;; - Ignored
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;;
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;; * %%al
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;;
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("%\\sw+" . font-lock-variable-name-face)
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;; Hexadecimal Literal
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;;
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;; - Valid
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;;
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;; * 0x0123456789abcdef
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;; * 0XDEADBEEFu
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;; * -0xdeadbeefULL
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;;
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;; - Ignored
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;;
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;; * 0x0123456789abcdefg
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;;
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("\\b\\(0[xX]\\)[[:xdigit:]]+\\([ulUL]*\\)\\b"
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(1 font-lock-constant-face)
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(2 font-lock-constant-face))
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;; Binary Literal
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;;
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;; - Valid
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;;
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;; * 0b0101101101
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;; * 0B0101101101u
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;; * -0b0101101101ULL
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;;
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;; - Ignored
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;;
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;; * 0b012
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;;
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("\\b\\(0[bB]\\)[01]+\\([ulUL]*\\)\\b"
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(1 font-lock-constant-face)
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(2 font-lock-constant-face))
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;; Octal Literal
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;;
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;; - Valid
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;;
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;; * 01234567
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;; * 01234567l
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;; * -01234567ULL
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;;
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;; - Ignored
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;;
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;; * 012345678
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;;
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("\\b\\(0\\)[0-7]+\\([ulUL]*\\)\\b"
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(1 font-lock-constant-face)
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(2 font-lock-constant-face))
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;; Builtin Constants
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;;
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;; - Valid
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;;
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;; * 123456789
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;; * 123456789l
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;; * -01234567ULL
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;;
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;; - Ignored
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;;
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;; * 123456789a
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;; * 123456789aul
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;;
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("\\b[1-9][0-9]+\\([ulUL]*\\)\\b"
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1 font-lock-constant-face)
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;; AT&T Fortran-Style Assembler Comment
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;;
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;; - Valid
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;;
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;; * /heyho
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;; * //heyho
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;;
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;; - Ignored
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;;
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;; * /heyho
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;; * code code //heyho
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;;
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("^/.*$" . font-lock-comment-face)
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;; AT&T-Style Directional Label
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;;
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;; - Valid
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;;
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;; * 1f
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;; * 99b
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;;
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("\\b\\([0-9]+\\)[fb]\\b" 1 font-lock-function-name-face)))
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"Additional expressions to highlight in Assembler mode.")
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(defun cosmo-asm-doctag-keywords (limit)
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(cosmo-fontify '((0 . font-lock-constant-face))
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asm-mode-doctag-regexp
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limit
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(lambda (face syntax)
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(or (memq face '(font-lock-comment-face))
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(and syntax
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(nth 4 syntax))))))
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(defun cosmo-asm-supplemental-hook ()
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"GNU Assembly in Bell Laboratories Style."
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(setq asm-comment-char ?¯) ;; Was ESR using TASM?
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(font-lock-add-keywords 'asm-mode
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'((cosmo-asm-doctag-keywords))
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'append)
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(set (make-local-variable 'require-final-newline) nil)
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(set (make-local-variable 'indent-tabs-mode) t)
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(set (make-local-variable 'tab-width) 8))
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(progn
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(add-hook 'asm-mode-hook 'cosmo-asm-supplemental-hook)
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(setq asm-font-lock-keywords cosmo-asm-font-lock-keywords))
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;; Make -*-unix-assembly-*- mode line work correctly like GitHub.
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(define-derived-mode unix-assembly-mode asm-mode "UNIX Assembly")
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(provide 'cosmo-asm-mode)
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