49 lines
2.2 KiB
Plaintext
49 lines
2.2 KiB
Plaintext
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/* m88kdgux.ld - COFF linker directives for G++ on an AViiON
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This file is part of GNU CC.
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GNU CC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU CC 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU CC; see the file COPYING. If not, write to
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the Free Software Foundation, 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA.
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On The AViiON we start the output .text section somewhere after the
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first 64kb (0x10000) of logical address space so that the first
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64kb can be mapped out, thus catching references through null
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pointers. We actually start at 0x10200 (for efficiency). Ideally,
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we want the page offset of a given word of the .text (output)
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section to be the same as it's page offset in the actual (output)
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linked core file so that paging of the .text section is efficient.
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In order to do this we allow for up to 0x200 bytes of header stuff
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in the output (linked) object file.
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For .data, the OCS says that regions with different "protections"
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(i.e. read/write, read-only) should not share any 4 megabyte chunk
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of the logical address space, so we start the .data segment at the
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first (lowest) 4 MB boundary past the end of the .text segment.
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For some reason, you can't start right at the 4 MB boundary. You
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have to start at some distance past that. The distance must be
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equal to the distance from the start of the last 64 KB segment in
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the (output) .text segment to the actual end of the (output) .text
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segment. */
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SECTIONS {
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.text 0x10200 BLOCK(0x200) :
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{ *(.init) *(.initp) *(.finip) *(.text) *(.tdesc) }
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GROUP BIND (((((ADDR(.text) + SIZEOF(.text) - 1) / 0x400000) + 1) * 0x400000) + ((ADDR(.text) + SIZEOF (.text)) % 0x10000)) :
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{ .data : { *(.data) *(.ctors) *(.dtors) }
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.bss : {} }
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}
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