This series introduces Position Independent Executables (PIEs) for the ARM architecture. The main goal is to avoid having to write low level code in assembly as this is currently the case for suspend/resume. Multiple platforms will benefit from this infrastructure: at91, rockchip, am335x.
It would also be beneficial for the LPDDR support on at91 to avoid having the handle the DDR controller from 4 different drivers. Russell, do you see any remaining issues with the current approach? Changes in v4: - rebased on v4.9-rc1 - Fixed an issue with the alignment reported by Mylene Changes in v3: - rebased on v4.8-rc1 Changes in v2: - handle big endian - handle gcov and ftrace by disabling them before compilling the PIE - Get the alignment from the original ELF to ensure the PIE is properly aligned in SRAM. - stop using fncpy - rebased on v4.7-rc1 Alexandre Belloni (2): ARM: PIE infrastructure ARM: at91: pm: switch to the PIE infrastructure arch/arm/Kconfig | 2 + arch/arm/Makefile | 1 + arch/arm/mach-at91/Kconfig | 1 + arch/arm/mach-at91/Makefile | 2 +- arch/arm/mach-at91/pm.c | 31 ++-- arch/arm/mach-at91/pm/.gitignore | 2 + arch/arm/mach-at91/pm/Makefile | 3 + arch/arm/mach-at91/pm/atmel_pm.c | 97 +++++++++++ arch/arm/mach-at91/pm_suspend.S | 338 --------------------------------------- arch/arm/pie/Kconfig | 8 + arch/arm/pie/Makefile | 1 + arch/arm/pie/Makefile.pie | 86 ++++++++++ arch/arm/pie/lib/empty.c | 15 ++ arch/arm/pie/pie.c | 97 +++++++++++ arch/arm/pie/pie.lds.S | 40 +++++ include/linux/pie.h | 146 +++++++++++++++++ 16 files changed, 510 insertions(+), 360 deletions(-) create mode 100644 arch/arm/mach-at91/pm/.gitignore create mode 100644 arch/arm/mach-at91/pm/Makefile create mode 100644 arch/arm/mach-at91/pm/atmel_pm.c delete mode 100644 arch/arm/mach-at91/pm_suspend.S create mode 100644 arch/arm/pie/Kconfig create mode 100644 arch/arm/pie/Makefile create mode 100644 arch/arm/pie/Makefile.pie create mode 100644 arch/arm/pie/lib/empty.c create mode 100644 arch/arm/pie/pie.c create mode 100644 arch/arm/pie/pie.lds.S create mode 100644 include/linux/pie.h -- 2.10.2
