diff options
Diffstat (limited to 'elfcpp')
| -rw-r--r-- | elfcpp/ChangeLog | 7 | ||||
| -rw-r--r-- | elfcpp/powerpc.h | 55 |
2 files changed, 61 insertions, 1 deletions
diff --git a/elfcpp/ChangeLog b/elfcpp/ChangeLog index 0c9c001..4d0a503 100644 --- a/elfcpp/ChangeLog +++ b/elfcpp/ChangeLog @@ -1,5 +1,12 @@ 2013-10-30 Alan Modra <amodra@gmail.com> + * powerpc.h (EF_PPC64_ABI): New enum constant. + (STO_PPC64_LOCAL_BIT, STO_PPC64_LOCAL_MASK): Likewise. + (ppc64_decode_local_entry): New function. + (ppc64_encode_local_entry): Likewise. + +2013-10-30 Alan Modra <amodra@gmail.com> + * powerpc.h (R_PPC64_ADDR16_HIGH, R_PPC64_ADDR16_HIGHA, R_PPC64_TPREL16_HIGH, R_PPC64_TPREL16_HIGHA, R_PPC64_DTPREL16_HIGH, R_PPC64_DTPREL16_HIGHA): Define. diff --git a/elfcpp/powerpc.h b/elfcpp/powerpc.h index fb4256b..98354a2 100644 --- a/elfcpp/powerpc.h +++ b/elfcpp/powerpc.h @@ -1,6 +1,6 @@ // powerpc.h -- ELF definitions specific to EM_PPC and EM_PPC64 -*- C++ -*- -// Copyright 2008, 2010, 2012 Free Software Foundation, Inc. +// Copyright 2008, 2010, 2012, 2013 Free Software Foundation, Inc. // Written by David S. Miller <davem@davemloft.net>. // This file is part of elfcpp. @@ -214,6 +214,59 @@ enum EF_PPC_RELOCATABLE_LIB = 0x00008000, // PowerPC -mrelocatable-lib flag. */ }; +// e_flags values defined for powerpc64 +enum +{ + // ABI version + // 1 for original function descriptor using ABI, + // 2 for revised ABI without function descriptors, + // 0 for unspecified or not using any features affected by the differences. + EF_PPC64_ABI = 3 +}; + +enum +{ + // The ELFv2 ABI uses three bits in the symbol st_other field of a + // function definition to specify the number of instructions between a + // function's global entry point and local entry point. + // The global entry point is used when it is necessary to set up the + // toc pointer (r2) for the function. Callers must enter the global + // entry point with r12 set to the global entry point address. On + // return from the function, r2 may have a different value to that + // which it had on entry. + // The local entry point is used when r2 is known to already be valid + // for the function. There is no requirement on r12 when using the + // local entry point, and on return r2 will contain the same value as + // at entry. + // A value of zero in these bits means that the function has a single + // entry point with no requirement on r12 or r2, and that on return r2 + // will contain the same value as at entry. + // Values of one and seven are reserved. + + STO_PPC64_LOCAL_BIT = 5, + STO_PPC64_LOCAL_MASK = 0xE0 +}; + +// 3 bit other field to bytes. +static inline unsigned int +ppc64_decode_local_entry(unsigned int other) +{ + return ((1 << other) >> 2) << 2; +} + +// bytes to field value. +static inline unsigned int +ppc64_encode_local_entry(unsigned int val) +{ + return (val >= 4 * 4 + ? (val >= 8 * 4 + ? (val >= 16 * 4 ? 6 : 5) + : 4) + : (val >= 2 * 4 + ? 3 + : (val >= 1 * 4 ? 2 : 0))); +} + } // End namespace elfcpp. #endif // !defined(ELFCPP_POWERPC_H) |