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3cd64feb2e
This reduces the amount of memory that needs to be allocated while writing the ELF file to disk. Note: We're abusing #:page-aligned? in 'link-elf' to choose whether to return a bytevector or a procedure. * module/system/vm/linker.scm (process-reloc): Subtract SECTION-OFFSET when writing to BV. (write-linker-object): Pass BV directly to the linker object writer. (link-elf): When PAGE-ALIGNED? is false, call 'bytevector-slice' from here. When it is true, return a procedure that takes a port and writes to it, without having to allocate a bytevector for the whole ELF container. * module/language/bytecode/spec.scm (bytecode->value): Handle X being a procedure instead of a bytevector. (bytecode) <#:printer>: Likewise. * test-suite/tests/linker.test (link-elf-with-one-main-section): Pass #:page-aligned? #f.
53 lines
1.9 KiB
Scheme
53 lines
1.9 KiB
Scheme
;;; Bytecode
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;; Copyright (C) 2013, 2023 Free Software Foundation, Inc.
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;;;; This library is free software; you can redistribute it and/or
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;;;; modify it under the terms of the GNU Lesser General Public
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;;;; License as published by the Free Software Foundation; either
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;;;; version 3 of the License, or (at your option) any later version.
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;;;;
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;;;; This library is distributed in the hope that it will be useful,
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;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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;;;; Lesser General Public License for more details.
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;;;;
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;;;; You should have received a copy of the GNU Lesser General Public
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;;;; License along with this library; if not, write to the Free Software
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;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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;;; Code:
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(define-module (language bytecode spec)
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#:use-module (system base language)
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#:use-module (system vm loader)
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#:use-module (rnrs bytevectors)
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#:use-module (ice-9 binary-ports)
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#:use-module (srfi srfi-71)
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#:export (bytecode))
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(define (bytecode->value x e opts)
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(let ((thunk (load-thunk-from-memory
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(if (bytevector? x)
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x
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(let ((port get-bv (open-bytevector-output-port)))
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(x port)
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(close-port port)
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(get-bv))))))
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(if (eq? e (current-module))
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;; save a cons in this case
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(values (thunk) e e)
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(save-module-excursion
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(lambda ()
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(set-current-module e)
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(values (thunk) e e))))))
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(define-language bytecode
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#:title "Bytecode"
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#:compilers `((value . ,bytecode->value))
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#:printer (lambda (bytecode port)
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(if (bytevector? bytecode)
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(put-bytevector port bytecode)
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(bytecode port)))
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#:reader get-bytevector-all
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#:for-humans? #f)
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