189 lines
4.6 KiB
Plaintext
189 lines
4.6 KiB
Plaintext
/*
|
|
* memory map assumed by prom and standalone system
|
|
*
|
|
* physical kseg1 use
|
|
*
|
|
* 0x1fc20000 0xbfc20000
|
|
* to prom text and read-only data
|
|
* 0x1fc00000 0xbfc00000 (in cpu board "prom space")
|
|
*
|
|
* (Top of RAM - 8K) downward sash and standalone program stack
|
|
* | ( - 8K to preserve kernel message bufs)
|
|
* V (standalone programs grow their stack
|
|
* immediately below sash's stack)
|
|
*
|
|
* ^
|
|
* |
|
|
* 0x00100000 0xa0100000 upward sash program text, data, and bss
|
|
*
|
|
* ^
|
|
* |
|
|
* 0x00020000 0xa0020000 upward standalone program text, data, and bss
|
|
* (kernel is loaded here, also)
|
|
*
|
|
* 0x0001ffff 0xa001ffff downward dbgmon stack
|
|
* |
|
|
* V
|
|
*
|
|
* ^
|
|
* |
|
|
* 0x00010000 0xa0010000 upward dbgmon text, data, and bss
|
|
*
|
|
* 0x0000ffff 0xa000ffff downward prom monitor stack
|
|
* |
|
|
* V
|
|
*
|
|
* ^
|
|
* |
|
|
* 0x00000500 0xa0000500 upward prom monitor bss
|
|
*
|
|
* 0x000004ff 0xa00004ff
|
|
* to restart block
|
|
* 0x00000400 0xa0000400
|
|
*
|
|
* 0x000003ff 0xa00003ff
|
|
* to general exception code
|
|
* 0x00000080 0xa0000080 (note cpu addresses as 0x80000080!)
|
|
*
|
|
* 0x0000007f 0xa000007f
|
|
* to utlbmiss exception code
|
|
* 0x00000000 0xa0000000 (note cpu addresses as 0x80000000!)
|
|
*/
|
|
|
|
/* Uncomment this if you want srecords.
|
|
OUTPUT_FORMAT(srec)
|
|
*/
|
|
ENTRY(start)
|
|
STARTUP(crt0.o)
|
|
INPUT(array.o)
|
|
SEARCH_DIR(.)
|
|
__DYNAMIC = 0;
|
|
|
|
/*
|
|
* Allocate the stack to be at the top of memory, since the stack
|
|
* grows down
|
|
*
|
|
PROVIDE (__stack = 1M - 8);
|
|
*/
|
|
|
|
/*
|
|
* Initalize some symbols to be zero so we can reference them in the
|
|
* crt0 without core dumping. These functions are all optional, but
|
|
* we do this so we can have our crt0 always use them if they exist.
|
|
* This is so BSPs work better when using the crt0 installed with gcc.
|
|
* We have to initalize them twice, so we multiple object file
|
|
* formats, as some prepend an underscore.
|
|
*/
|
|
PROVIDE (hardware_exit_hook = 0);
|
|
PROVIDE (hardware_hazard_hook = 0);
|
|
PROVIDE (hardware_init_hook = 0);
|
|
PROVIDE (software_init_hook = 0);
|
|
|
|
SECTIONS
|
|
{
|
|
. = 0x80020000;
|
|
.text : {
|
|
_ftext = . ;
|
|
KEEP (*(.init))
|
|
eprol = .;
|
|
*(.text)
|
|
*(.text.*)
|
|
*(.gnu.linkonce.t.*)
|
|
*(.mips16.fn.*)
|
|
*(.mips16.call.*)
|
|
PROVIDE (__runtime_reloc_start = .);
|
|
*(.rel.sdata)
|
|
PROVIDE (__runtime_reloc_stop = .);
|
|
KEEP (*(.fini))
|
|
etext = .;
|
|
_etext = .;
|
|
}
|
|
|
|
.eh_frame_hdr : { *(.eh_frame_hdr) }
|
|
.eh_frame : {
|
|
/* The .eh_frame section from the crtend file contains the
|
|
end of eh_frame marker and it must be last. */
|
|
KEEP (*(EXCLUDE_FILE (*crtend.o) .eh_frame))
|
|
KEEP (*(.eh_frame))
|
|
}
|
|
.gcc_except_table : { *(.gcc_except_table) }
|
|
.jcr : { KEEP (*(.jcr)) }
|
|
.ctors :
|
|
{
|
|
/* 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))
|
|
|
|
/* We don't want to include the .ctor section from
|
|
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) .ctors))
|
|
KEEP (*(SORT(.ctors.*)))
|
|
KEEP (*(.ctors))
|
|
}
|
|
|
|
.dtors :
|
|
{
|
|
KEEP (*crtbegin.o(.dtors))
|
|
KEEP (*(EXCLUDE_FILE (*crtend.o) .dtors))
|
|
KEEP (*(SORT(.dtors.*)))
|
|
KEEP (*(.dtors))
|
|
}
|
|
|
|
. = .;
|
|
.rdata : {
|
|
*(.rdata)
|
|
*(.rodata)
|
|
*(.rodata.*)
|
|
*(.gnu.linkonce.r.*)
|
|
}
|
|
_fdata = ALIGN(16);
|
|
. = _fdata;
|
|
.data : {
|
|
*(.data)
|
|
*(.data.*)
|
|
*(.gnu.linkonce.d.*)
|
|
}
|
|
_gp = ALIGN(16) + 0x8000;
|
|
.lit8 : {
|
|
*(.lit8)
|
|
}
|
|
.lit4 : {
|
|
*(.lit4)
|
|
}
|
|
.sdata : {
|
|
*(.sdata)
|
|
*(.sdata.*)
|
|
*(.gnu.linkonce.s.*)
|
|
}
|
|
edata = .;
|
|
_edata = .;
|
|
_fbss = .;
|
|
.sbss : {
|
|
*(.sbss)
|
|
*(.sbss.*)
|
|
*(.gnu.linkonce.sb.*)
|
|
*(.scommon)
|
|
}
|
|
.bss : {
|
|
_bss_start = . ;
|
|
*(.bss)
|
|
*(.bss.*)
|
|
*(.gnu.linkonce.b.*)
|
|
*(COMMON)
|
|
}
|
|
. = ALIGN(4);
|
|
end = .;
|
|
_end = .;
|
|
}
|