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113 lines
2.2 KiB
Text
113 lines
2.2 KiB
Text
/*
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This linker script links the object files when generating the ELF
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output. Note how symbols romdata, bbss, ebss, bdata and edata are used
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in the initialization routine (crt0.c) to initialize the application.
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Two ram areas are specified. It happens, if I'm not wrong, that the
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"real ram" is accessed directly while the "common" ram is accessed
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through the mmu. The interrupt handler resides in "real ram" because it
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couldn't execute well in ram. While SH7335 and SH7355 had no problems,
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executing the interrupt handler in the common ram on SH7305-based new
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models caused trouble to the OS, apparently overwriting ram data.
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*/
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OUTPUT_ARCH(sh3)
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ENTRY(_start)
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MEMORY
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{
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rom : o = 0x00300200, l = 512k
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/* 0x0810000 is apparently mapped to 0x8801c0000. */
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ram : o = 0x08100000, l = 8k
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realram : o = 0x8800d000, l = 12k
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}
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SECTIONS
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{
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/*
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ROM sections : binary code and read-only data.
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*/
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.text : {
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/* Initialization code. */
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*(.pretext.entry)
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*(.pretext)
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_bctors = . ;
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*(.ctors)
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_ectors = . ;
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_bdtors = . ;
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*(.dtors)
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_edtors = . ;
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*(.text)
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*(.text.*)
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} > rom
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.rodata : {
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*(.rodata.fxconv);
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*(.rodata)
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*(.rodata.*)
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_romdata = ALIGN(4) ;
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} > rom
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/*
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RAM sections : bss section and read/write data.
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The BSS section is meant to be stripped from the ELF file (to
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reduce the binary size) and initialized with zeros in the
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initialization routine, therefore its location is undefined.
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*/
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.bss : {
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_bbss = . ;
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*(.bss)
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_ebss = . ;
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} > ram
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.data : AT(_romdata) ALIGN(4) {
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_bdata = . ;
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*(.data)
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*(.data.*)
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_edata = . ;
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} > ram
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.cc : AT(_romdata + SIZEOF(.data)) ALIGN(4) {
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*(.eh_frame)
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*(.jcr)
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_gint_data = _romdata + SIZEOF(.data) + SIZEOF(.cc) ;
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} > ram
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/*
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Real RAM : interrupt, exception and TLB miss handlers.
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*/
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.gint : AT(_gint_data) ALIGN(4) {
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/* The vbr needs to be 0x100-aligned because of an ld issue. */
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. = ALIGN(0x100) ;
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_gint_vbr = . ;
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_bgint = . ;
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/* Exception handler. */
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. = _gint_vbr + 0x100 ;
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*(.gint.exc.entry)
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*(.gint.exc)
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/* TLB miss handler. */
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. = _gint_vbr + 0x400 ;
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*(.gint.tlb.entry)
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*(.gint.tlb)
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/* Interrupt handler. */
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. = _gint_vbr + 0x600 ;
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*(.gint.int.entry)
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*(.gint.int)
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_egint = . ;
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} > realram
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}
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