From 7c6e489b23476ad6149c173b6971327aa2eb7726 Mon Sep 17 00:00:00 2001 From: Julius Werner Date: Fri, 24 Jan 2014 16:23:08 -0800 Subject: arm: Put assembly functions into separate sections This patch changes the ENTRY() macro in asm.h to create a new section for every assembler function, thus providing dcache_clean/invalidate_all and friends with the same --gc-sections goodness that our C functions have. This requires a few minor changes of moving around data (to make sure it ends up in the right section) and changing some libgcc functions (which apparently need to have two names?), but nothing serious. (You may note that some of our assembly functions have data, sometimes even writable, within the same .text section. This has been this way before and I'm not looking to change it for now, although it's not totally clean. Since we don't enforce read-only sections through paging, it doesn't really hurt.) BUG=None TEST=Nyan and Snow still boot. Confirm dcache_invalidate_all is not output into any binary anymore since no one actually uses it. Original-Change-Id: I247b29d6173ba516c8dff59126c93b66f7dc4b8d Original-Signed-off-by: Julius Werner Original-Reviewed-on: https://chromium-review.googlesource.com/183891 (cherry picked from commit 4a3f2e45e06cc8592d56c3577f41ff879f10e9cc) Signed-off-by: Marc Jones Change-Id: Ieaa4f2ea9d81c5b9e2b36a772ff9610bdf6446f9 Reviewed-on: http://review.coreboot.org/7451 Tested-by: build bot (Jenkins) Reviewed-by: David Hendricks --- payloads/libpayload/arch/arm/exception_asm.S | 16 +++++++++------- payloads/libpayload/arch/arm/head.S | 10 +++++----- payloads/libpayload/arch/arm/memcpy.S | 2 -- payloads/libpayload/arch/arm/memmove.S | 2 -- payloads/libpayload/arch/arm/memset.S | 3 --- 5 files changed, 14 insertions(+), 19 deletions(-) (limited to 'payloads/libpayload/arch') diff --git a/payloads/libpayload/arch/arm/exception_asm.S b/payloads/libpayload/arch/arm/exception_asm.S index 31d759335f..1f369bcc05 100644 --- a/payloads/libpayload/arch/arm/exception_asm.S +++ b/payloads/libpayload/arch/arm/exception_asm.S @@ -27,13 +27,7 @@ * SUCH DAMAGE. */ - .global exception_stack_end -exception_stack_end: - .word 0 - -exception_handler: - .word 0 - + .text .align 6 .arm @@ -88,6 +82,7 @@ exception_common: ldmfd sp!, { pc }^ + .align 2 _undefined_instruction: .word exception_undefined_instruction _software_interrupt: .word exception_software_interrupt _prefetch_abort: .word exception_prefetch_abort @@ -96,6 +91,13 @@ _not_used: .word exception_not_used _irq: .word exception_irq _fiq: .word exception_fiq + .global exception_stack_end +exception_stack_end: + .word 0 + +exception_handler: + .word 0 + .thumb .global set_vbar .thumb_func diff --git a/payloads/libpayload/arch/arm/head.S b/payloads/libpayload/arch/arm/head.S index 0d23c7256f..54fdb5defd 100644 --- a/payloads/libpayload/arch/arm/head.S +++ b/payloads/libpayload/arch/arm/head.S @@ -29,10 +29,6 @@ #include -1: -.align 4 -.word _stack - /* * Our entry point */ @@ -43,7 +39,7 @@ ENTRY(_entry) /* TODO: Clear BSS */ /* Setup new stack */ - ldr sp, 1b + ldr sp, 1f /* TODO: Save old stack pointer and link register */ @@ -57,3 +53,7 @@ ENTRY(_entry) /* Return to the original context. */ bx lr ENDPROC(_entry) + +.align 4 +1: +.word _stack diff --git a/payloads/libpayload/arch/arm/memcpy.S b/payloads/libpayload/arch/arm/memcpy.S index b8f857bb56..1388d05ad9 100644 --- a/payloads/libpayload/arch/arm/memcpy.S +++ b/payloads/libpayload/arch/arm/memcpy.S @@ -52,8 +52,6 @@ ldmfd sp!, {r0, \reg1, \reg2} .endm - .text - /* Prototype: void *memcpy(void *dest, const void *src, size_t n); */ ENTRY(memcpy) diff --git a/payloads/libpayload/arch/arm/memmove.S b/payloads/libpayload/arch/arm/memmove.S index dc29f7458c..bd5f8f1ac5 100644 --- a/payloads/libpayload/arch/arm/memmove.S +++ b/payloads/libpayload/arch/arm/memmove.S @@ -13,8 +13,6 @@ #include #include "asmlib.h" - .text - /* * Prototype: void *memmove(void *dest, const void *src, size_t n); * diff --git a/payloads/libpayload/arch/arm/memset.S b/payloads/libpayload/arch/arm/memset.S index 945767c599..0c1102deb4 100644 --- a/payloads/libpayload/arch/arm/memset.S +++ b/payloads/libpayload/arch/arm/memset.S @@ -13,9 +13,6 @@ #include #include "asmlib.h" - .text - .align 5 - ENTRY(memset) ands r3, r0, #3 @ 1 unaligned? mov ip, r0 @ preserve r0 as return value -- cgit v1.2.3