mirror of
https://github.com/autc04/Retro68.git
synced 2024-11-28 05:51:04 +00:00
242 lines
8.1 KiB
Python
242 lines
8.1 KiB
Python
|
#
|
||
|
|
# Unusual variables checked by this code:
|
||
|
|
# NOP - two byte opcode for no-op (defaults to 0)
|
||
|
|
# INITIAL_READONLY_SECTIONS - at start of text segment
|
||
|
|
# OTHER_READONLY_SECTIONS - other than .text .init .rodata ...
|
||
|
|
# (e.g., .PARISC.milli)
|
||
|
|
# OTHER_TEXT_SECTIONS - these get put in .text when relocating
|
||
|
|
# OTHER_READWRITE_SECTIONS - other than .data .bss .ctors .sdata ...
|
||
|
|
# (e.g., .PARISC.global)
|
||
|
|
# OTHER_SECTIONS - at the end
|
||
|
|
# EXECUTABLE_SYMBOLS - symbols that must be defined for an
|
||
|
|
# executable (e.g., _DYNAMIC_LINK)
|
||
|
|
# TEXT_START_SYMBOLS - symbols that appear at the start of the
|
||
|
|
# .text section.
|
||
|
|
# DATA_START_SYMBOLS - symbols that appear at the start of the
|
||
|
|
# .data section.
|
||
|
|
# OTHER_GOT_SYMBOLS - symbols defined just before .got.
|
||
|
|
# OTHER_GOT_SECTIONS - sections just after .got and .sdata.
|
||
|
|
# OTHER_BSS_SYMBOLS - symbols that appear at the start of the
|
||
|
|
# .bss section besides __bss_start.
|
||
|
|
# INPUT_FILES - INPUT command of files to always include
|
||
|
|
# INIT_START, INIT_END - statements just before and just after
|
||
|
|
# combination of .init sections.
|
||
|
|
# FINI_START, FINI_END - statements just before and just after
|
||
|
|
# combination of .fini sections.
|
||
|
|
#
|
||
|
|
# When adding sections, do note that the names of some sections are used
|
||
|
|
# when specifying the start address of the next.
|
||
|
|
#
|
||
|
|
|
||
|
|
# Many sections come in three flavours. There is the 'real' section,
|
||
|
|
# like ".data". Then there are the per-procedure or per-variable
|
||
|
|
# sections, generated by -ffunction-sections and -fdata-sections in GCC,
|
||
|
|
# and useful for --gc-sections, which for a variable "foo" might be
|
||
|
|
# ".data.foo". Then there are the linkonce sections, for which the linker
|
||
|
|
# eliminates duplicates, which are named like ".gnu.linkonce.d.foo".
|
||
|
|
# The exact correspondences are:
|
||
|
|
#
|
||
|
|
# Section Linkonce section
|
||
|
|
# .text .gnu.linkonce.t.foo
|
||
|
|
# .rodata .gnu.linkonce.r.foo
|
||
|
|
# .data .gnu.linkonce.d.foo
|
||
|
|
# .bss .gnu.linkonce.b.foo
|
||
|
|
# .sdata .gnu.linkonce.s.foo
|
||
|
|
# .sbss .gnu.linkonce.sb.foo
|
||
|
|
# .sdata2 .gnu.linkonce.s2.foo
|
||
|
|
# .sbss2 .gnu.linkonce.sb2.foo
|
||
|
|
#
|
||
|
|
# Each of these can also have corresponding .rel.* and .rela.* sections.
|
||
|
|
|
||
|
|
test -z "$ENTRY" && ENTRY=_start
|
||
|
|
test -z "${BIG_OUTPUT_FORMAT}" && BIG_OUTPUT_FORMAT=${OUTPUT_FORMAT}
|
||
|
|
test -z "${LITTLE_OUTPUT_FORMAT}" && LITTLE_OUTPUT_FORMAT=${OUTPUT_FORMAT}
|
||
|
|
if [ -z "$MACHINE" ]; then OUTPUT_ARCH=${ARCH}; else OUTPUT_ARCH=${ARCH}:${MACHINE}; fi
|
||
|
|
test -z "${ELFSIZE}" && ELFSIZE=32
|
||
|
|
test -z "${ALIGNMENT}" && ALIGNMENT="${ELFSIZE} / 8"
|
||
|
|
CTOR=".ctors ${CONSTRUCTING-0} :
|
||
|
|
{
|
||
|
|
${CONSTRUCTING+${CTOR_START}}
|
||
|
|
/* gcc uses crtbegin.o to find the start of
|
||
|
|
the constructors, so we make sure it is
|
||
|
|
first. Because this is a wildcard, it
|
||
|
|
doesn't matter if the user does not
|
||
|
|
actually link against crtbegin.o; the
|
||
|
|
linker won't look for a file to match a
|
||
|
|
wildcard. The wildcard also means that it
|
||
|
|
doesn't matter which directory crtbegin.o
|
||
|
|
is in. */
|
||
|
|
|
||
|
|
KEEP (*crtbegin.o(.ctors))
|
||
|
|
KEEP (*crtbegin?.o(.ctors))
|
||
|
|
|
||
|
|
/* We don't want to include the .ctor section from
|
||
|
|
the crtend.o file until after the sorted ctors.
|
||
|
|
The .ctor section from the crtend file contains the
|
||
|
|
end of ctors marker and it must be last */
|
||
|
|
|
||
|
|
KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o $OTHER_EXCLUDE_FILES) .ctors))
|
||
|
|
KEEP (*(SORT(.ctors.*)))
|
||
|
|
KEEP (*(.ctors))
|
||
|
|
${CONSTRUCTING+${CTOR_END}}
|
||
|
|
} > ROM"
|
||
|
|
|
||
|
|
DTOR=" .dtors ${CONSTRUCTING-0} :
|
||
|
|
{
|
||
|
|
${CONSTRUCTING+${DTOR_START}}
|
||
|
|
KEEP (*crtbegin.o(.dtors))
|
||
|
|
KEEP (*crtbegin?.o(.dtors))
|
||
|
|
KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o $OTHER_EXCLUDE_FILES) .dtors))
|
||
|
|
KEEP (*(SORT(.dtors.*)))
|
||
|
|
KEEP (*(.dtors))
|
||
|
|
${CONSTRUCTING+${DTOR_END}}
|
||
|
|
} > ROM"
|
||
|
|
|
||
|
|
cat <<EOF
|
||
|
|
OUTPUT_FORMAT("${OUTPUT_FORMAT}", "${BIG_OUTPUT_FORMAT}",
|
||
|
|
"${LITTLE_OUTPUT_FORMAT}")
|
||
|
|
OUTPUT_ARCH(${OUTPUT_ARCH})
|
||
|
|
${RELOCATING+ENTRY(${ENTRY})}
|
||
|
|
|
||
|
|
${RELOCATING+${LIB_SEARCH_DIRS}}
|
||
|
|
${RELOCATING+${EXECUTABLE_SYMBOLS}}
|
||
|
|
${RELOCATING+${INPUT_FILES}}
|
||
|
|
${RELOCATING- /* For some reason, the Solaris linker makes bad executables
|
||
|
|
if gld -r is used and the intermediate file has sections starting
|
||
|
|
at non-zero addresses. Could be a Solaris ld bug, could be a GNU ld
|
||
|
|
bug. But for now assigning the zero vmas works. */}
|
||
|
|
|
||
|
|
/* There are two memory regions we care about, one from 0 through 0x7F00
|
||
|
|
that is RAM and one from 0x8000 up which is ROM. */
|
||
|
|
MEMORY
|
||
|
|
{
|
||
|
|
RAM (w) : ORIGIN = 0, LENGTH = 0x7F00
|
||
|
|
ROM (!w) : ORIGIN = 0x8000, LENGTH = 0xFF8000
|
||
|
|
}
|
||
|
|
|
||
|
|
SECTIONS
|
||
|
|
{
|
||
|
|
.data ${RELOCATING-0} :
|
||
|
|
{
|
||
|
|
${RELOCATING+__rdata = .;}
|
||
|
|
${RELOCATING+__data = .;}
|
||
|
|
${RELOCATING+${DATA_START_SYMBOLS}}
|
||
|
|
*(.data)
|
||
|
|
${RELOCATING+*(.data.*)}
|
||
|
|
${RELOCATING+*(.gnu.linkonce.d.*)}
|
||
|
|
${CONSTRUCTING+SORT(CONSTRUCTORS)}
|
||
|
|
} > RAM
|
||
|
|
${RELOCATING+${OTHER_READWRITE_SECTIONS}}
|
||
|
|
${RELOCATING+${OTHER_GOT_SYMBOLS}}
|
||
|
|
${RELOCATING+${OTHER_GOT_SECTIONS}}
|
||
|
|
${RELOCATING+_edata = .;}
|
||
|
|
${RELOCATING+PROVIDE (edata = .);}
|
||
|
|
${RELOCATING+__bss_start = .;}
|
||
|
|
${RELOCATING+${OTHER_BSS_SYMBOLS}}
|
||
|
|
.bss ${RELOCATING-0} :
|
||
|
|
{
|
||
|
|
*(.dynbss)
|
||
|
|
*(.bss)
|
||
|
|
${RELOCATING+*(.bss.*)}
|
||
|
|
${RELOCATING+*(.gnu.linkonce.b.*)}
|
||
|
|
*(COMMON)
|
||
|
|
/* Align here to ensure that the .bss section occupies space up to
|
||
|
|
_end. Align after .bss to ensure correct alignment even if the
|
||
|
|
.bss section disappears because there are no input sections. */
|
||
|
|
${RELOCATING+. = ALIGN(${ALIGNMENT});}
|
||
|
|
} > RAM
|
||
|
|
${RELOCATING+${OTHER_BSS_END_SYMBOLS}}
|
||
|
|
${RELOCATING+. = ALIGN(${ALIGNMENT});}
|
||
|
|
${RELOCATING+${OTHER_END_SYMBOLS}}
|
||
|
|
${RELOCATING+_end = .;}
|
||
|
|
${RELOCATING+__stack = .;}
|
||
|
|
${RELOCATING+PROVIDE (end = .);}
|
||
|
|
|
||
|
|
/* Read-only sections in ROM. */
|
||
|
|
.int_vec ${RELOCATING-0} : { *(.int_vec) } ${RELOCATING+> ROM}
|
||
|
|
|
||
|
|
.rodata ${RELOCATING-0} : { *(.rodata) ${RELOCATING+*(.rodata.*)} ${RELOCATING+*(.gnu.linkonce.r.*)} } ${RELOCATING+> ROM}
|
||
|
|
${RELOCATING+${CTOR}}
|
||
|
|
${RELOCATING+${DTOR}}
|
||
|
|
.jcr : { KEEP (*(.jcr)) } ${RELOCATING+> ROM}
|
||
|
|
.eh_frame : { KEEP (*(.eh_frame)) } ${RELOCATING+> ROM}
|
||
|
|
.gcc_except_table : { *(.gcc_except_table) } ${RELOCATING+> ROM}
|
||
|
|
.plt : { *(.plt) } ${RELOCATING+> ROM}
|
||
|
|
|
||
|
|
.text ${RELOCATING-0} :
|
||
|
|
{
|
||
|
|
${RELOCATING+${TEXT_START_SYMBOLS}}
|
||
|
|
*(.text)
|
||
|
|
${RELOCATING+*(.text.*)}
|
||
|
|
*(.stub)
|
||
|
|
/* .gnu.warning sections are handled specially by elf32.em. */
|
||
|
|
*(.gnu.warning)
|
||
|
|
${RELOCATING+*(.gnu.linkonce.t.*)}
|
||
|
|
${RELOCATING+${OTHER_TEXT_SECTIONS}}
|
||
|
|
} ${RELOCATING+> ROM =${NOP-0}}
|
||
|
|
.init ${RELOCATING-0} :
|
||
|
|
{
|
||
|
|
${RELOCATING+${INIT_START}}
|
||
|
|
KEEP (*(.init))
|
||
|
|
${RELOCATING+${INIT_END}}
|
||
|
|
} ${RELOCATING+> ROM =${NOP-0}}
|
||
|
|
.fini ${RELOCATING-0} :
|
||
|
|
{
|
||
|
|
${RELOCATING+${FINI_START}}
|
||
|
|
KEEP (*(.fini))
|
||
|
|
${RELOCATING+${FINI_END}}
|
||
|
|
} ${RELOCATING+> ROM =${NOP-0}}
|
||
|
|
${RELOCATING+PROVIDE (__etext = .);}
|
||
|
|
${RELOCATING+PROVIDE (_etext = .);}
|
||
|
|
${RELOCATING+PROVIDE (etext = .);}
|
||
|
|
${RELOCATING+${OTHER_READONLY_SECTIONS}}
|
||
|
|
|
||
|
|
|
||
|
|
/* Stabs debugging sections. */
|
||
|
|
.stab 0 : { *(.stab) }
|
||
|
|
.stabstr 0 : { *(.stabstr) }
|
||
|
|
.stab.excl 0 : { *(.stab.excl) }
|
||
|
|
.stab.exclstr 0 : { *(.stab.exclstr) }
|
||
|
|
.stab.index 0 : { *(.stab.index) }
|
||
|
|
.stab.indexstr 0 : { *(.stab.indexstr) }
|
||
|
|
|
||
|
|
.comment 0 : { *(.comment) }
|
||
|
|
|
||
|
|
/* DWARF debug sections.
|
||
|
|
Symbols in the DWARF debugging sections are relative to the beginning
|
||
|
|
of the section so we begin them at 0. */
|
||
|
|
|
||
|
|
/* DWARF 1 */
|
||
|
|
.debug 0 : { *(.debug) }
|
||
|
|
.line 0 : { *(.line) }
|
||
|
|
|
||
|
|
/* GNU DWARF 1 extensions */
|
||
|
|
.debug_srcinfo 0 : { *(.debug_srcinfo) }
|
||
|
|
.debug_sfnames 0 : { *(.debug_sfnames) }
|
||
|
|
|
||
|
|
/* DWARF 1.1 and DWARF 2 */
|
||
|
|
.debug_aranges 0 : { *(.debug_aranges) }
|
||
|
|
.debug_pubnames 0 : { *(.debug_pubnames) }
|
||
|
|
|
||
|
|
/* DWARF 2 */
|
||
|
|
.debug_info 0 : { *(.debug_info) *(.gnu.linkonce.wi.*) }
|
||
|
|
.debug_abbrev 0 : { *(.debug_abbrev) }
|
||
|
|
.debug_line 0 : { *(.debug_line) }
|
||
|
|
.debug_frame 0 : { *(.debug_frame) }
|
||
|
|
.debug_str 0 : { *(.debug_str) }
|
||
|
|
.debug_loc 0 : { *(.debug_loc) }
|
||
|
|
.debug_macinfo 0 : { *(.debug_macinfo) }
|
||
|
|
|
||
|
|
/* SGI/MIPS DWARF 2 extensions */
|
||
|
|
.debug_weaknames 0 : { *(.debug_weaknames) }
|
||
|
|
.debug_funcnames 0 : { *(.debug_funcnames) }
|
||
|
|
.debug_typenames 0 : { *(.debug_typenames) }
|
||
|
|
.debug_varnames 0 : { *(.debug_varnames) }
|
||
|
|
|
||
|
|
${RELOCATING+${OTHER_RELOCATING_SECTIONS}}
|
||
|
|
|
||
|
|
/* These must appear regardless of ${RELOCATING}. */
|
||
|
|
${OTHER_SECTIONS}
|
||
|
|
}
|
||
|
|
EOF
|