From: Albert ARIBAUD Date: Thu, 11 Apr 2013 05:43:21 +0000 (+0000) Subject: ARM: Fix __bss_start and __bss_end in linker scripts X-Git-Url: http://git.dujemihanovic.xyz/login.html?a=commitdiff_plain;h=f84a7b8f54db;p=u-boot.git ARM: Fix __bss_start and __bss_end in linker scripts Commit 3ebd1cbc introduced compiler-generated __bss_start and __bss_end__ and commit c23561e7 rewrote all __bss_end__ as __bss_end. Their merge caused silent and harmless but potentially bug-inducing clashes between compiler- and linker- generated __bss_end symbols. Make __bss_end and __bss_start compiler-only, and create __bss_base and __bss_limit for linker-only use. Signed-off-by: Albert ARIBAUD Reported-by: Benoît Thébaudeau --- diff --git a/arch/arm/cpu/ixp/u-boot.lds b/arch/arm/cpu/ixp/u-boot.lds index 388a67f101..553589ca6c 100644 --- a/arch/arm/cpu/ixp/u-boot.lds +++ b/arch/arm/cpu/ixp/u-boot.lds @@ -69,17 +69,23 @@ SECTIONS _end = .; +/* + * Compiler-generated __bss_start and __bss_end, see arch/arm/lib/bss.c + * __bss_base and __bss_limit are for linker only (overlay ordering) + */ + .bss_start __rel_dyn_start (OVERLAY) : { KEEP(*(.__bss_start)); + __bss_base = .; } - .bss __bss_start (OVERLAY) : { + .bss __bss_base (OVERLAY) : { *(.bss*) . = ALIGN(4); - __bss_end = .; + __bss_limit = .; } - .bss_end __bss_end (OVERLAY) : { - KEEP(*(__bss_end)); + .bss_end __bss_limit (OVERLAY) : { + KEEP(*(.__bss_end)); } /DISCARD/ : { *(.dynstr*) } diff --git a/arch/arm/cpu/u-boot.lds b/arch/arm/cpu/u-boot.lds index 3a1083d9a9..d5e42d3ac9 100644 --- a/arch/arm/cpu/u-boot.lds +++ b/arch/arm/cpu/u-boot.lds @@ -81,18 +81,24 @@ SECTIONS *(.mmutable) } +/* + * Compiler-generated __bss_start and __bss_end, see arch/arm/lib/bss.c + * __bss_base and __bss_limit are for linker only (overlay ordering) + */ + .bss_start __rel_dyn_start (OVERLAY) : { KEEP(*(.__bss_start)); + __bss_base = .; } - .bss __bss_start (OVERLAY) : { + .bss __bss_base (OVERLAY) : { *(.bss*) . = ALIGN(4); - __bss_end = .; + __bss_limit = .; } - .bss_end __bss_end (OVERLAY) : { - KEEP(*(__bss_end)); + .bss_end __bss_limit (OVERLAY) : { + KEEP(*(.__bss_end)); } /DISCARD/ : { *(.dynstr*) } diff --git a/board/actux1/u-boot.lds b/board/actux1/u-boot.lds index 52fc9fc0c6..ef4a25bc3c 100644 --- a/board/actux1/u-boot.lds +++ b/board/actux1/u-boot.lds @@ -77,17 +77,23 @@ SECTIONS _end = .; +/* + * Compiler-generated __bss_start and __bss_end, see arch/arm/lib/bss.c + * __bss_base and __bss_limit are for linker only (overlay ordering) + */ + .bss_start __rel_dyn_start (OVERLAY) : { KEEP(*(.__bss_start)); + __bss_base = .; } - .bss __bss_start (OVERLAY) : { + .bss __bss_base (OVERLAY) : { *(.bss*) . = ALIGN(4); - __bss_end = .; + __bss_limit = .; } - .bss_end __bss_end (OVERLAY) : { - KEEP(*(__bss_end)); + .bss_end __bss_limit (OVERLAY) : { + KEEP(*(.__bss_end)); } /DISCARD/ : { *(.dynstr*) } diff --git a/board/actux2/u-boot.lds b/board/actux2/u-boot.lds index cafd3d859d..00ad8b71cd 100644 --- a/board/actux2/u-boot.lds +++ b/board/actux2/u-boot.lds @@ -77,17 +77,23 @@ SECTIONS _end = .; +/* + * Compiler-generated __bss_start and __bss_end, see arch/arm/lib/bss.c + * __bss_base and __bss_limit are for linker only (overlay ordering) + */ + .bss_start __rel_dyn_start (OVERLAY) : { KEEP(*(.__bss_start)); + __bss_base = .; } - .bss __bss_start (OVERLAY) : { + .bss __bss_base (OVERLAY) : { *(.bss*) . = ALIGN(4); - __bss_end = .; + __bss_limit = .; } - .bss_end __bss_end (OVERLAY) : { - KEEP(*(__bss_end)); + .bss_end __bss_limit (OVERLAY) : { + KEEP(*(.__bss_end)); } /DISCARD/ : { *(.dynstr*) } diff --git a/board/actux3/u-boot.lds b/board/actux3/u-boot.lds index 168fe171c4..44b990ee7f 100644 --- a/board/actux3/u-boot.lds +++ b/board/actux3/u-boot.lds @@ -77,17 +77,23 @@ SECTIONS _end = .; +/* + * Compiler-generated __bss_start and __bss_end, see arch/arm/lib/bss.c + * __bss_base and __bss_limit are for linker only (overlay ordering) + */ + .bss_start __rel_dyn_start (OVERLAY) : { KEEP(*(.__bss_start)); + __bss_base = .; } - .bss __bss_start (OVERLAY) : { + .bss __bss_base (OVERLAY) : { *(.bss*) . = ALIGN(4); - __bss_end = .; + __bss_limit = .; } - .bss_end __bss_end (OVERLAY) : { - KEEP(*(__bss_end)); + .bss_end __bss_limit (OVERLAY) : { + KEEP(*(.__bss_end)); } /DISCARD/ : { *(.dynstr*) } diff --git a/board/dvlhost/u-boot.lds b/board/dvlhost/u-boot.lds index dd50bdbecd..6d4b1875c5 100644 --- a/board/dvlhost/u-boot.lds +++ b/board/dvlhost/u-boot.lds @@ -77,17 +77,23 @@ SECTIONS _end = .; +/* + * Compiler-generated __bss_start and __bss_end, see arch/arm/lib/bss.c + * __bss_base and __bss_limit are for linker only (overlay ordering) + */ + .bss_start __rel_dyn_start (OVERLAY) : { KEEP(*(.__bss_start)); + __bss_base = .; } - .bss __bss_start (OVERLAY) : { + .bss __bss_base (OVERLAY) : { *(.bss*) . = ALIGN(4); - __bss_end = .; + __bss_limit = .; } - .bss_end __bss_end (OVERLAY) : { - KEEP(*(__bss_end)); + .bss_end __bss_limit (OVERLAY) : { + KEEP(*(.__bss_end)); } /DISCARD/ : { *(.dynstr*) } diff --git a/board/freescale/mx31ads/u-boot.lds b/board/freescale/mx31ads/u-boot.lds index f48fda171f..4969960001 100644 --- a/board/freescale/mx31ads/u-boot.lds +++ b/board/freescale/mx31ads/u-boot.lds @@ -80,17 +80,23 @@ SECTIONS _end = .; +/* + * Compiler-generated __bss_start and __bss_end, see arch/arm/lib/bss.c + * __bss_base and __bss_limit are for linker only (overlay ordering) + */ + .bss_start __rel_dyn_start (OVERLAY) : { KEEP(*(.__bss_start)); + __bss_base = .; } - .bss __bss_start (OVERLAY) : { + .bss __bss_base (OVERLAY) : { *(.bss*) . = ALIGN(4); - __bss_end = .; + __bss_limit = .; } - .bss_end __bss_end (OVERLAY) : { - KEEP(*(__bss_end)); + .bss_end __bss_limit (OVERLAY) : { + KEEP(*(.__bss_end)); } /DISCARD/ : { *(.bss*) }