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authorAlan Modra <amodra@gmail.com>2013-10-29 17:45:48 +1030
committerAlan Modra <amodra@gmail.com>2013-10-30 13:45:05 +1030
commitb4f7960d5307fe4aad2126382df78f63696e96b3 (patch)
tree4c7724bb2d479d9b9d36427e34de30d088750dad /elfcpp
parentd4a95d4999e7fe0d868254bec76722b35f064184 (diff)
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PowerPC64 ELFv2 support for gold.
elfcpp/ * 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. gold/ * powerpc.cc (Powerpc_relobj::abiversion, set_abiversion, ppc64_local_entry_offset, ppc64_local_entry_offset, do_read_symbols): New functions. (Powerpc_relobj::e_flags_, st_other_): New vars. (Powerpc_relobj::Powerpc_relobj): Call set_abiversion. (Powerpc_dynobj::abiversion, set_abiversion): New functions. (Powerpc_relobj::e_flags_): New var. (Target_powerpc::first_plt_entry_offset, plt_entry_size): Inline and adjust for ELFv2. (Target_powerpc::abiversion, set_abiversion, stk_toc): New functions. (Powerpc_relobj::do_find_special_sections): Check no .opd in ELFv2. (Powerpc_dynobj::do_find_special_sections): Likewise. (Target_powerpc::do_define_standard_symbols): Define ".TOC.". (Target_powerpc::Branch_info::make_stub): Adjust stub destination to ELFv2 local entry. (Target_powerpc::do_relax): No thread safe barriers needed for ELFv2. (Output_data_plt_powerpc::initial_plt_entry_size_, plt_entry_size): Delete. Replace all uses with first_plt_entry_offset() and plt_entry_size(). (Output_data_plt_powerpc::Output_data_plt_powerpc): Remove reserved_size parm. Update callers. (Output_data_plt_powerpc::entry_count): Update. (Output_data_plt_powerpc::first_plt_entry_offset): Make private and use Target_powerpc::first_plt_entry_offset(). (Output_data_plt_powerpc::get_plt_entry_size): Similarly and rename to plt_entry_size. (Output_data_plt_powerpc::add_ifunc_entry, add_local_ifunc_entry): Adjust reloc for ELFv2. (glink_eh_frame_fde_64): Rename to glink_eh_frame_fde_64v1. (glink_eh_frame_fde_64v2): New. (Stub_table::plt_call_size): Support ELFv2 sizing. (Output_data_glink::add_eh_frame): Use the new FDE. (Output_data_glink::set_final_data_size): Adjust for ELFv2 glink. (Stub_table::do_write): Write ELFv2 stubs and glink. (Target_powerpc::Relocate::relocate): Replaces nop after call with ld 2,24(1) and adjust local offset destination for ELFv2.
Diffstat (limited to 'elfcpp')
-rw-r--r--elfcpp/ChangeLog7
-rw-r--r--elfcpp/powerpc.h55
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)