https://bugs.gentoo.org/454200 http://sourceware.org/bugzilla/show_bug.cgi?id=15006 From b39949d21179bd0b08a083e4f7e35d0c98e11294 Mon Sep 17 00:00:00 2001 From: Carlos O'Donell Date: Fri, 8 Feb 2013 12:26:12 -0500 Subject: [PATCH] ARM: Support loading unmarked objects from cache. ARM now supports loading unmarked objects from the dynamic loader cache. Unmarked objects can be used with the hard-float or soft-float ABI. We must support loading unmarked objects during the transition period from a binutils that does not mark objects to one that does mark them with the correct ELF flags. Signed-off-by: Carlos O'Donell --- ChangeLog | 5 +++++ elf/cache.c | 4 ++++ ports/ChangeLog.arm | 8 ++++++++ ports/sysdeps/unix/sysv/linux/arm/dl-cache.h | 9 +++++++-- ports/sysdeps/unix/sysv/linux/arm/readelflib.c | 6 ++++++ sysdeps/generic/ldconfig.h | 1 + 6 files changed, 31 insertions(+), 2 deletions(-) 2013-02-08 Carlos O'Donell * sysdeps/generic/ldconfig.h: Define FLAG_ARM_LIBSF. * elf/cache.c (print_entry): Add FLAG_ARM_LIBSF support. diff --git a/elf/cache.c b/elf/cache.c index 9901952..699550b 100644 --- a/elf/cache.c +++ b/elf/cache.c @@ -100,6 +100,10 @@ print_entry (const char *lib, int flag, unsigned int osversion, case FLAG_AARCH64_LIB64: fputs (",AArch64", stdout); break; + /* Uses the ARM soft-float ABI. */ + case FLAG_ARM_LIBSF: + fputs (",soft-float", stdout); + break; case 0: break; default: 2013-02-08 Carlos O'Donell * sysdeps/unix/sysv/linux/arm/dl-cache.h [__ARM_PCS_VFP] (_dl_cache_check_flags): Allow plain FLAG_ELF_LIBC6. [!__ARM_PCS_VFP] (_dl_cache_check_flags): Likewise. * sysdeps/unix/sysv/linux/arm/readelflib.c (process_elf_file): Set FLAG_ARM_LIBSF for soft-float ABI otherwise just FLAG_ELF_LIBC6. diff --git a/ports/sysdeps/unix/sysv/linux/arm/dl-cache.h b/ports/sysdeps/unix/sysv/linux/arm/dl-cache.h index acc4f28..504feca 100644 --- a/ports/sysdeps/unix/sysv/linux/arm/dl-cache.h +++ b/ports/sysdeps/unix/sysv/linux/arm/dl-cache.h @@ -18,12 +18,17 @@ #include +/* In order to support the transition from unmarked objects + to marked objects we must treat unmarked objects as + compatible with either FLAG_ARM_LIBHF or FLAG_ARM_LIBSF. */ #ifdef __ARM_PCS_VFP # define _dl_cache_check_flags(flags) \ - ((flags) == (FLAG_ARM_LIBHF | FLAG_ELF_LIBC6)) + ((flags) == (FLAG_ARM_LIBHF | FLAG_ELF_LIBC6) \ + || (flags) == FLAG_ELF_LIBC6) #else # define _dl_cache_check_flags(flags) \ - ((flags) == FLAG_ELF_LIBC6) + ((flags) == (FLAG_ARM_LIBSF | FLAG_ELF_LIBC6) \ + || (flags) == FLAG_ELF_LIBC6) #endif #include_next diff --git a/ports/sysdeps/unix/sysv/linux/arm/readelflib.c b/ports/sysdeps/unix/sysv/linux/arm/readelflib.c index 81e5ccb..3efb613 100644 --- a/ports/sysdeps/unix/sysv/linux/arm/readelflib.c +++ b/ports/sysdeps/unix/sysv/linux/arm/readelflib.c @@ -46,6 +46,12 @@ process_elf_file (const char *file_name, const char *lib, int *flag, if (elf32_header->e_flags & EF_ARM_ABI_FLOAT_HARD) *flag = FLAG_ARM_LIBHF|FLAG_ELF_LIBC6; else if (elf32_header->e_flags & EF_ARM_ABI_FLOAT_SOFT) + *flag = FLAG_ARM_LIBSF|FLAG_ELF_LIBC6; + else + /* We must assume the unmarked objects are compatible + with all ABI variants. Such objects may have been + generated in a transitional period when the ABI + tags were not added to all objects. */ *flag = FLAG_ELF_LIBC6; } } diff --git a/sysdeps/generic/ldconfig.h b/sysdeps/generic/ldconfig.h index 57a9a46..91190aa 100644 --- a/sysdeps/generic/ldconfig.h +++ b/sysdeps/generic/ldconfig.h @@ -36,6 +36,7 @@ #define FLAG_X8664_LIBX32 0x0800 #define FLAG_ARM_LIBHF 0x0900 #define FLAG_AARCH64_LIB64 0x0a00 +#define FLAG_ARM_LIBSF 0x0b00 /* Name of auxiliary cache. */ #define _PATH_LDCONFIG_AUX_CACHE "/var/cache/ldconfig/aux-cache" -- 1.8.2.1