R_ARM_ABS32 relocation records cause symbol references to be zero before relocation, and become correct only after relocation. On the other hand, R_ARM_RELATIVE records make references correct before as well as after relocation.
This patch series aims at removing all R_ARM_ABS32 relocations from ARM targets.
the main contributor of R_ARM_ABS32 relocations is the support code for linker-lists, aka Linker-Generated Arrays. This is due to the fact that LGA start and end symbols, used for ranging these arrays, are linker- generated symbols, which always relocate as R_ARM_ABS32 even though they are supposed *not* to be absolute.
V1 of this patch series fixed LGAs so that start or end symbols are actually compiler-generated, and thus their references are relocated using R_ARM_RELATIVE; V2 also fixes crt0 so that BSS start and end references do not produce R_ARM_ABS32 relocations either.
With V2, none of the targets built with MAKEALL -a arm produces any R_ARM_ABS32 relocation.
This series has been build-tested with ARM (295 targets clean) and powerpc (634 targets clean)
Changes in v2: - fixed missing .sram memory mapping in OMAP lds - removed useless linker script sections in SPL lds files - made BSS start and end compiler-generated - moved SPL linker script changes to their own commit - added KEEP() to all linker files - removed spurious change to common/command.c - changed empty type from struct {} to char[0] - dropped patch to removed board/micronas/vct/u-boot.lds - removed all references to u-boot.lst
Albert ARIBAUD (4): arm: omap: map u_boot_lists section to .sram Remove linker lists (LGAs) from SPL linker scripts arm: make __bss_start and __bss_end__ compiler-generated Refactor linker-generated arrays
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board/w7o/u-boot.lds.debug | 2 +- board/xes/xpedite1000/u-boot.lds.debug | 2 +- common/cmd_help.c | 2 +- config.mk | 2 - doc/README.commands | 18 +- helper.mk | 64 ------ include/command.h | 2 +- include/configs/am335x_evm.h | 2 +- include/configs/pcm051.h | 2 +- include/env_callback.h | 2 +- include/linker_lists.h | 252 +++++++++++++++++----- nand_spl/board/freescale/mpc8536ds/Makefile | 7 +- nand_spl/board/freescale/mpc8569mds/Makefile | 7 +- nand_spl/board/freescale/mpc8572ds/Makefile | 7 +- nand_spl/board/freescale/mx31pdk/Makefile | 7 +- nand_spl/board/freescale/mx31pdk/u-boot.lds | 2 +- nand_spl/board/freescale/p1010rdb/Makefile | 7 +- nand_spl/board/freescale/p1023rds/Makefile | 7 +- nand_spl/board/freescale/p1_p2_rdb/Makefile | 7 +- nand_spl/board/karo/tx25/Makefile | 7 +- nand_spl/board/karo/tx25/u-boot.lds | 2 +- nand_spl/board/samsung/smdk6400/u-boot.lds | 2 +- spl/.gitignore | 1 - spl/Makefile | 8 +- 190 files changed, 665 insertions(+), 424 deletions(-) create mode 100644 arch/arm/cpu/armv7/am33xx/u-boot-spl.lds create mode 100644 arch/arm/cpu/u-boot-spl.lds create mode 100644 arch/arm/lib/bss.c delete mode 100644 helper.mk