Date: Fri, 30 Oct 2015 12:21:37 +0000 (UTC) From: Zbigniew Bodek <zbb@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r290192 - head/contrib/gdb/gdb Message-ID: <201510301221.t9UCLbfS010592@repo.freebsd.org>
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Author: zbb Date: Fri Oct 30 12:21:37 2015 New Revision: 290192 URL: https://svnweb.freebsd.org/changeset/base/290192 Log: Workaround KGDB issues on ARM by ignoring ARM EABI version higher than 5 To make KGDB working, it needs to understand kernel ELF image. By default it is compiled using EABI_5, which is not supported on the gdb-6. As a workaround, treat these images as EABI_2 because they share a lot of things in common. This workaround does not guarantee ALL funtionalities to work. Submitted by: Wojciech Macek <wma@semihalf.com> Reviewed by: jhb Obtained from: Semihalf Sponsored by: Juniper Networks Inc. Differential Revision: https://reviews.freebsd.org/D4012 Modified: head/contrib/gdb/gdb/arm-tdep.c Modified: head/contrib/gdb/gdb/arm-tdep.c ============================================================================== --- head/contrib/gdb/gdb/arm-tdep.c Fri Oct 30 12:00:34 2015 (r290191) +++ head/contrib/gdb/gdb/arm-tdep.c Fri Oct 30 12:21:37 2015 (r290192) @@ -2580,6 +2580,21 @@ arm_elf_osabi_sniffer (bfd *abfd) osabi = GDB_OSABI_ARM_EABI_V2; break; + case EF_ARM_EABI_VER3: + case EF_ARM_EABI_VER4: + case EF_ARM_EABI_VER5: + /* + * GDB does not support these EABI versions. Fallback + * to the highest known to make the KGDB working with + * kernel ELF image. + */ + osabi = GDB_OSABI_ARM_EABI_V2; + printf ("\n%s:%d " + "arm_elf_osabi_sniffer: Unsupported ARM EABI " + "version 0x%x, falling back to 0x%x\n", + __FILE__, __LINE__, eflags, EF_ARM_EABI_VER2); + break; + case EF_ARM_EABI_UNKNOWN: /* Assume GNU tools. */ osabi = GDB_OSABI_ARM_APCS;
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