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Could anyone answer me this post thank you very much, Linker script question? where is the fixed_vectors section?(Online waiting for help)
- From: "Qiang Huang" <jameshq at liverpool dot ac dot uk>
- To: "Ecos-Discuss" <ecos-discuss at sources dot redhat dot com>
- Date: Thu, 23 Jan 2003 23:35:01 -0000
- Subject: [ECOS] Could anyone answer me this post thank you very much, Linker script question? where is the fixed_vectors section?(Online waiting for help)
-----Original Message-----
From: ecos-discuss-owner@sources.redhat.com
[mailto:ecos-discuss-owner@sources.redhat.com]On Behalf Of Qiang Huang
Sent: 23 January 2003 21:45
To: Ecos-Discuss
Subject: [ECOS] Linker script question? where is the fixed_vectors
section?ARM
Hi all:
In a rom startup linker script I saw these and I can't figure this
out.(ARM target)
MEMORY
{
ram : ORIGIN = 0, LENGTH = 0x8000000
rom : ORIGIN = 0x40000000, LENGTH = 0x100000
}
SECTIONS
{
SECTIONS_BEGIN
SECTION_rom_vectors (rom, 0x40000000, LMA_EQ_VMA)
SECTION_text (rom, ALIGN (0x4), LMA_EQ_VMA)
SECTION_fini (rom, ALIGN (0x4), LMA_EQ_VMA)
SECTION_rodata (rom, ALIGN (0x4), LMA_EQ_VMA)
SECTION_rodata1 (rom, ALIGN (0x4), LMA_EQ_VMA)
SECTION_fixup (rom, ALIGN (0x4), LMA_EQ_VMA)
SECTION_gcc_except_table (rom, ALIGN (0x4), LMA_EQ_VMA)
SECTION_fixed_vectors (ram, 0x20, LMA_EQ_VMA)
SECTION_data (ram, 0x8000, FOLLOWING (.gcc_except_table))
SECTION_bss (ram, ALIGN (0x4), LMA_EQ_VMA)
CYG_LABEL_DEFN(__heap1) = ALIGN (0x8);
SECTIONS_END
}
if the flash is originally located at 0x0000H, then if I create a S-record
file and want to download it to the rom, where will be the section:
fixed_vectors stored? because it is defined as: SECTION_fixed_vectors
(ram, 0x20, LMA_EQ_VMA), according to LMA_EQ_VMA it should be stored at the
same address as the VMA as here in the ram, how is this interpreted in the
S-record file (file for downloading into the flash memory)? Thanks a lot.
BTW the order of the sections in the flash memory after the S-record file
downloaded is:
0x0000H 1. rom_vectors
continue. 2. text
cont. 3. fini
cont. 4. rodata
cont. 5. rodata1
cont. 6. fixup
cont. 7. gcc_exception_table
cont. 8. data
Is the correct? if so where is the fixed_vectors section stored in
flash(rom).
Thanks a lot
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