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