From a23eb47bf2fe0b4f9ad480d61f1b0635b6f189f3 Mon Sep 17 00:00:00 2001 From: Juergen Borleis Date: Fri, 27 May 2016 11:32:48 +0200 Subject: PPC: fix size optimisation Since patch e92abad36307d the linker discards sections which seems not used to make the image smaller. But this change will discard the whole init and exception code from start.S which renders the final image useless. From 'barebox.map' without this patch: Discarded input sections .text 0x0000000000000000 0x358c arch/ppc/mach-mpc5xxx/start.o .data 0x0000000000000000 0x0 arch/ppc/mach-mpc5xxx/start.o .bss 0x0000000000000000 0x0 arch/ppc/mach-mpc5xxx/start.o .got2 0x0000000000000000 0x24 arch/ppc/mach-mpc5xxx/start.o [...] So, define the entry point to mark the init and exception used. From 'barebox.map' with this patch applied: Discarded input sections .data 0x0000000000000000 0x0 arch/ppc/mach-mpc5xxx/start.o .bss 0x0000000000000000 0x0 arch/ppc/mach-mpc5xxx/start.o [...] Note: tested on MPC5200 at run time, for MPC85XX compile time only Signed-off-by: Juergen Borleis Signed-off-by: Sascha Hauer --- arch/ppc/boards/pcm030/barebox.lds.S | 1 + arch/ppc/mach-mpc85xx/barebox.lds.S | 1 + 2 files changed, 2 insertions(+) diff --git a/arch/ppc/boards/pcm030/barebox.lds.S b/arch/ppc/boards/pcm030/barebox.lds.S index 0e08e053f7..0e34f0a41b 100644 --- a/arch/ppc/boards/pcm030/barebox.lds.S +++ b/arch/ppc/boards/pcm030/barebox.lds.S @@ -20,6 +20,7 @@ #include OUTPUT_ARCH("powerpc") +ENTRY(_start) /* Do we need any of these for elf? __DYNAMIC = 0; */ SECTIONS diff --git a/arch/ppc/mach-mpc85xx/barebox.lds.S b/arch/ppc/mach-mpc85xx/barebox.lds.S index 1f7f52c39c..beebab39d6 100644 --- a/arch/ppc/mach-mpc85xx/barebox.lds.S +++ b/arch/ppc/mach-mpc85xx/barebox.lds.S @@ -22,6 +22,7 @@ #endif OUTPUT_ARCH("powerpc") +ENTRY(_start_e500) PHDRS { -- cgit v1.2.3