Messages in this thread | | | Date | Fri, 16 Dec 2016 07:34:48 +0100 | From | Lukasz Majewski <> | Subject | Problem with early debugging (arch/arm/boot/compressed/head.S) |
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Dear All,
My SoC: Cortex-A15, TI (AM57xx)
My setup: Linux v4.9: tag v4.9-rc8
Toolchain: TI's SDK: ti-am572x-idk-sdk/linux-devkit/sysroots/x86_64-arago-linux/usr/bin/arm-linux-gnueabihf-
I'm trying to get early print messages on UART1 (0x4806a000).
Relevant .config defines:
CONFIG_DEBUG_LL=y CONFIG_DEBUG_LL_INCLUDE="debug/omap2plus.S" CONFIG_EARLY_PRINTK=y CONFIG_DEBUG_OMAP2UART1=y
've enabled debugging in the arch/arm/boot/compressed/head.S file (#define DEBUG).
Unfortunately I do have following errors:
CC arch/arm/boot/compressed/decompress.o arch/arm/boot/compressed/head.S: Assembler messages: arch/arm/boot/compressed/head.S:1286: Error: ARM register expected -- `sub ,r3,r1' arch/arm/boot/compressed/head.S:1286: Error: ARM register expected -- `ldr r3,[,#0]' arch/arm/boot/compressed/head.S:1286: Error: ARM register expected -- `ldr r1,[,#4]' arch/arm/boot/compressed/head.S:1286: Error: ARM register expected -- `str r3,[,#0]' arch/arm/boot/compressed/head.S:1286: Error: ARM register expected -- `str r3,[,#4]' arch/arm/boot/compressed/head.S:1286: Error: ARM register expected -- `str r3,[,#8]' arch/arm/boot/compressed/head.S:1286: Error: ARM register expected -- `str r3,[,#0]' arch/arm/boot/compressed/head.S:1286: Error: ARM register expected -- `str r3,[,#4]' arch/arm/boot/compressed/head.S:1286: Error: ARM register expected -- `str r3,[,#8]' arch/arm/boot/compressed/head.S:1286: Error: ARM register expected -- `ldr ,[,#8]' arch/arm/boot/compressed/head.S:1286: Error: shift expression expected -- `add r3,r3,' arch/arm/boot/compressed/head.S:1286: Error: shift expression expected -- `add r1,r1,' arch/arm/boot/compressed/head.S:1304: Error: ARM register expected -- `sub ,r3,r1' arch/arm/boot/compressed/head.S:1304: Error: ARM register expected -- `ldr r3,[,#0]' arch/arm/boot/compressed/head.S:1304: Error: ARM register expected -- `ldr r1,[,#4]' arch/arm/boot/compressed/head.S:1304: Error: ARM register expected -- `str r3,[,#0]' arch/arm/boot/compressed/head.S:1304: Error: ARM register expected -- `str r3,[,#4]' arch/arm/boot/compressed/head.S:1304: Error: ARM register expected -- `str r3,[,#8]' arch/arm/boot/compressed/head.S:1304: Error: ARM register expected -- `str r3,[,#0]' arch/arm/boot/compressed/head.S:1304: Error: ARM register expected -- `str r3,[,#4]' arch/arm/boot/compressed/head.S:1304: Error: ARM register expected -- `str r3,[,#8]' arch/arm/boot/compressed/head.S:1304: Error: ARM register expected -- `ldr ,[,#8]' arch/arm/boot/compressed/head.S:1304: Error: shift expression expected -- `add r3,r3,' arch/arm/boot/compressed/head.S:1304: Error: shift expression expected -- `add r1,r1,' scripts/Makefile.build:393: recipe for target 'arch/arm/boot/compressed/head.o' failed
Those are related to loadsp macro (also defined in head.S file), which is very short:
.macro loadsp, rb, tmp push {r7} addruart r7, \rb, \tmp pop {r7} .endm
Any ideas how to fix this issue? Any hints?
I initially thought that this is compiler configuration issue - but those errors are on many compilers (also incliding TI's SDK compiler).
Any ideas or hints how to proceed?
Best regards,
Łukasz Majewski
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