Handle the simulation of programs that load with data in ROM which needs to be
copied into RAM before execution starts.
This commit is contained in:
Nick Clifton
parent
5f92bef8a8
commit
5ee5024076
|
|
@ -1,3 +1,11 @@
|
|||
2003-04-23 Andrew Haley <aph@cambridge.redhat.com>
|
||||
|
||||
* xstormy16/sim_rom.ld: New.
|
||||
* xstormy16/Makefile.in (SIM_SCRIPTS): Add sim_rom.ld.
|
||||
* xstormy16/crt0.s (_int_reset): Copy ROM data to RAM.
|
||||
* xstormy16/eva_app.ld (_rdata, _data): New.
|
||||
* xstormy16/sim_high.ld (_rdata, _data): New.
|
||||
|
||||
2003-04-17 Inaoka Kazuhiro <inaoka.kazuhiro@renesas.com>
|
||||
|
||||
* m32r/Makefile.in: Add multilib support.
|
||||
|
|
|
|||
|
|
@ -45,7 +45,7 @@ SCRIPTS =
|
|||
CRT = crt0.o crti.o crtn.o
|
||||
|
||||
# Here is all of the simulator stuff
|
||||
SIM_SCRIPTS = sim_high.ld
|
||||
SIM_SCRIPTS = sim_high.ld sim_rom.ld
|
||||
SIM_LDFLAGS =
|
||||
SIM_BSP = libsim.a
|
||||
SIM_OBJS = syscalls.o sim_malloc_start.o
|
||||
|
|
|
|||
|
|
@ -22,8 +22,10 @@ _start:
|
|||
;; port1 interrupt
|
||||
jmpf _int_port1
|
||||
|
||||
.text
|
||||
# Reset code, set up memory and call main.
|
||||
.section .rodata
|
||||
2: .word __rdata
|
||||
.text
|
||||
_int_reset:
|
||||
;; Set up the stack pointer.
|
||||
mov r0,#__stack
|
||||
|
|
@ -36,6 +38,24 @@ _int_reset:
|
|||
mov r2,#0
|
||||
0: mov.w (r0++),r2
|
||||
blt r0,r1,0b
|
||||
|
||||
;; Copy data from ROM into RAM. ROM area may be above 64k,
|
||||
;; but RAM may not.
|
||||
mov r1,#__data
|
||||
mov r3,#_edata
|
||||
mov r4,#2b
|
||||
mov.w r0,(r4++)
|
||||
mov.w r2,(r4)
|
||||
mov r8,r2
|
||||
;; If _data == _rdata there's no need to copy anything.
|
||||
bnz r0,r1,0f
|
||||
bz r2,#0,1f
|
||||
0: movf.w r2,(r0++)
|
||||
bnz r0,#0,2f
|
||||
add r8,#1
|
||||
2: mov.w (r1++),r2
|
||||
blt r1,r3,0b
|
||||
1:
|
||||
;; Call hardware init routine
|
||||
callf _hwinit
|
||||
;; Call initialization routines
|
||||
|
|
|
|||
|
|
@ -16,6 +16,8 @@ SECTIONS
|
|||
__malloc_start = 0x800;
|
||||
.data :
|
||||
{
|
||||
__rdata = .;
|
||||
__data = .;
|
||||
*(.data)
|
||||
*(.data.*)
|
||||
*(.gnu.linkonce.d.*)
|
||||
|
|
|
|||
|
|
@ -78,6 +78,8 @@ SECTIONS
|
|||
PROVIDE (etext = .);
|
||||
.data :
|
||||
{
|
||||
__data = .;
|
||||
__rdata = .;
|
||||
*(.data)
|
||||
*(.data.*)
|
||||
*(.gnu.linkonce.d.*)
|
||||
|
|
|
|||
|
|
@ -17,6 +17,8 @@ SECTIONS
|
|||
{
|
||||
.data :
|
||||
{
|
||||
__data = .;
|
||||
__rdata = .;
|
||||
*(.data)
|
||||
*(.data.*)
|
||||
*(.gnu.linkonce.d.*)
|
||||
|
|
|
|||
|
|
@ -0,0 +1,138 @@
|
|||
/* Test xstormy16 programs that have initial data in ROM and copy it
|
||||
to RAM. */
|
||||
|
||||
OUTPUT_FORMAT("elf32-xstormy16", "elf32-xstormy16",
|
||||
"elf32-xstormy16")
|
||||
OUTPUT_ARCH(xstormy16)
|
||||
ENTRY(_start)
|
||||
SEARCH_DIR(/cuddles/aph/sanyo-011113-branch/install/xstormy16-elf/lib);
|
||||
/* 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
|
||||
{
|
||||
/* Read-only sections in ROM. */
|
||||
.int_vec : { *(.int_vec) } > ROM
|
||||
.rodata : { *(.rodata) *(.rodata.*) *(.gnu.linkonce.r.*) } > ROM
|
||||
.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))
|
||||
} > ROM
|
||||
.dtors :
|
||||
{
|
||||
KEEP (*crtbegin.o(.dtors))
|
||||
KEEP (*(EXCLUDE_FILE (*crtend.o ) .dtors))
|
||||
KEEP (*(SORT(.dtors.*)))
|
||||
KEEP (*(.dtors))
|
||||
} > ROM
|
||||
.jcr : { KEEP (*(.jcr)) } > ROM
|
||||
.eh_frame : { KEEP (*(.eh_frame)) } > ROM
|
||||
.gcc_except_table : { *(.gcc_except_table) } > ROM
|
||||
.plt : { *(.plt) } > ROM
|
||||
.text :
|
||||
{
|
||||
*(.text)
|
||||
*(.text.*)
|
||||
*(.stub)
|
||||
/* .gnu.warning sections are handled specially by elf32.em. */
|
||||
*(.gnu.warning)
|
||||
*(.gnu.linkonce.t.*)
|
||||
} > ROM =0
|
||||
.init :
|
||||
{
|
||||
KEEP (*(.init))
|
||||
} > ROM =0
|
||||
.fini :
|
||||
{
|
||||
KEEP (*(.fini))
|
||||
} > ROM =0
|
||||
PROVIDE (__etext = .);
|
||||
PROVIDE (_etext = .);
|
||||
PROVIDE (etext = .);
|
||||
. = ALIGN(2);
|
||||
__rdata = .;
|
||||
.data : AT (__rdata)
|
||||
{
|
||||
__data = .;
|
||||
*(.data)
|
||||
*(.data.*)
|
||||
*(.gnu.linkonce.d.*)
|
||||
SORT(CONSTRUCTORS)
|
||||
} > RAM
|
||||
_edata = .;
|
||||
PROVIDE (edata = .);
|
||||
__bss_start = .;
|
||||
/* Why do we need to give bss an AT address at all? Because if we
|
||||
don't, ld will generate another program header for it rather than
|
||||
using the one for .data. */
|
||||
.bss : AT (LOADADDR(.data) + SIZEOF(.data))
|
||||
{
|
||||
*(.dynbss)
|
||||
*(.bss)
|
||||
*(.bss.*)
|
||||
*(.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. */
|
||||
. = ALIGN(2);
|
||||
} > RAM
|
||||
. = ALIGN(2);
|
||||
_end = .;
|
||||
__stack = .;
|
||||
PROVIDE (end = .);
|
||||
/* 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) }
|
||||
/* These must appear regardless of . */
|
||||
}
|
||||
Loading…
Reference in New Issue