[PATCH] Gold: Add relocation types and etc for ARM.
Doug Kwan (關振德)
dougkwan@google.com
Wed May 27 02:20:00 GMT 2009
Hi,
This patch adds a number for symbolic constants for relocation
types, special sections and section types for ARM. The information
was based on the official ARM ELF specification (ARM IHI 044C, 10th
October 2008). I did not expect this to cause any problems but I ran
the gold tests anyway and they all passed.
-Doug
-------------------------
2009-05-26 Doug Kwan <dougkwan@google.com>
* arm.h: New file.
* elfcpp.h (SHT): Add ARM-specific special sections.
(PT): Add ARM-specific section types.
(SST): Add STT_ARM_TFUNC.
-------------- next part --------------
Index: elfcpp/arm.h
===================================================================
RCS file: elfcpp/arm.h
diff -N elfcpp/arm.h
--- /dev/null 1 Jan 1970 00:00:00 -0000
+++ elfcpp/arm.h 27 May 2009 01:47:57 -0000
@@ -0,0 +1,204 @@
+// arm.h -- ELF definitions specific to EM_ARM -*- C++ -*-
+
+// Copyright 2009, Free Software Foundation, Inc.
+// Written by Doug Kwan <dougkwan@google.com>.
+
+// This file is part of elfcpp.
+
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public License
+// as published by the Free Software Foundation; either version 2, or
+// (at your option) any later version.
+
+// In addition to the permissions in the GNU Library General Public
+// License, the Free Software Foundation gives you unlimited
+// permission to link the compiled version of this file into
+// combinations with other programs, and to distribute those
+// combinations without any restriction coming from the use of this
+// file. (The Library Public License restrictions do apply in other
+// respects; for example, they cover modification of the file, and
+// distribution when not linked into a combined executable.)
+
+// This program is distributed in the hope that it will be useful, but
+// WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+// Library General Public License for more details.
+
+// You should have received a copy of the GNU Library General Public
+// License along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
+// 02110-1301, USA.
+
+#ifndef ELFCPP_ARM_H
+#define ELFCPP_ARM_H
+
+// The relocation type information is taken from:
+//
+// ELF for the ARM Architecture
+// Document number: ARM IHI 0044C, current through ABI release 2.07
+// Date of Issue: 10th October, 2008
+//
+
+namespace elfcpp
+{
+
+//
+// ARM Relocations Codes
+//
+
+// Operation notes:
+// S: Address of the symbol.
+// A: Addend for relocation.
+// P: Address of the place being relocated.
+// Pa: Adjusted address of the place being relocated (P & 0xfffffffc)
+// T: is 1 if S has type STT_FUNC and the symbol addresses a Thumb
+// instruction.Thumb-bit; it is 0 otherwise.
+// B(S): Addressing origin of the output segment defining S.
+// GOT_ORG: Addressing origin of the Global Offset Table.
+// GOT(S): Address of the GOT entry for S.
+//
+
+enum
+{
+ // Type Class Operation
+ // ------------------------------
+ R_ARM_NONE = 0, // Static Misc
+ R_ARM_PC24 = 1, // Deprecated ARM ((S + A) | T) - P
+ R_ARM_ABS32 = 2, // Static Data (S + A) | T
+ R_ARM_REL32 = 3, // Static Data ((S + A) | T) - P
+ R_ARM_LDR_PC_G0 = 4, // Static ARM S + A - P
+ R_ARM_ABS16 = 5, // Static Data S + A
+ R_ARM_ABS12 = 6, // Static ARM S + A
+ R_ARM_THM_ABS5 = 7, // Static Thumb16 S + A
+ R_ARM_ABS8 = 8, // Static Data S + A
+ R_ARM_SBREL32 = 9, // Static Data ((S + A) | T) - B(S)
+ R_ARM_THM_CALL = 10, // Static Thumb32 ((S + A) | T) - P
+ R_ARM_THM_PC8 = 11, // Static Thumb16
+ R_ARM_BREL_ADJ = 12, // Dynamic Data DeltaB(S) + A
+ R_ARM_TLS_DESC = 13, // Dynamic Data
+ R_ARM_THM_SWI8 = 14, // Obsolete
+ R_ARM_XPC25 = 15, // Obsolete
+ R_ARM_THM_XPC22 = 16, // Obsolete
+ R_ARM_TLS_DTPMOD32 = 17, // Dynamic Data Module(S)
+ R_ARM_TLS_DTPOFF32 = 18, // Dynamic Data S + A - TLS
+ R_ARM_TLS_TPOFF32 = 19, // Dynamic Data S + A - tp
+ R_ARM_COPY = 20, // Dynamic Misc
+ R_ARM_GLOB_DAT = 21, // Dynamic Data (S + A) | T
+ R_ARM_JUMP_SLOT = 22, // Dynamic Data (S + A) | T
+ R_ARM_RELATIVE = 23, // Dynamic Data B(S) + A
+ R_ARM_GOTOFF32 = 24, // Static Data (((S + A) | T) - GOT_ORG
+ R_ARM_BASE_PREL = 25, // Static Data B(S) + A - P
+ R_ARM_GOT_BREL = 26, // Static Data GOT(S) + A - GOT_ORG
+ R_ARM_PLT32 = 27, // Deprecated ARM ((S + A) | T) - P
+ R_ARM_CALL = 28, // Static ARM ((S + A) | T) - P
+ R_ARM_JUMP24 = 29, // Static ARM ((S + A) | T) - P
+ R_ARM_THM_JUMP24 = 30, // Static Thumb32 ((S + A) | T) - P
+ R_ARM_BASE_ABS = 31, // Static Data B(S) + A
+ R_ARM_ALU_PCREL_7_0 = 32, // Obsolete
+ R_ARM_ALU_PCREL_15_8 = 33, // Obsolete
+ R_ARM_ALU_PCREL_23_15 = 34, // Obsolete
+ R_ARM_LDR_SBREL_11_0_NC = 35, // Deprecated ARM S + A - B(S)
+ R_ARM_ALU_SBREL_19_12_NC = 36,// Deprecated ARM S + A - B(S)
+ R_ARM_ALU_SBREL_27_20_CK = 37,// Deprecated ARM S + A - B(S)
+ R_ARM_TARGET1 = 38, // Data Misc (S + A) | T or
+ // ((S + A) | T) - P
+ R_ARM_SBREL31 = 39, // Deprecated Data ((S + A) | T) - B(S)
+ R_ARM_V4BX = 40, // Static Misc
+ R_ARM_TARGET2 = 41, // Static Misc
+ R_ARM_PREL31 = 42, // Static Data ((S + A) | T) - P
+ R_ARM_MOVW_ABS_NC = 43, // Static ARM (S + A) | T
+ R_ARM_MOVT_ABS = 44, // Static ARM S + A
+ R_ARM_MOVW_PREL_NC = 45, // Static ARM ((S + A) | T) - P
+ R_ARM_MOVT_PREL = 46, // Static ARM S + A - P
+ R_ARM_THM_MOVW_ABS_NC = 47, // Static Thumb32 (S + A) | T
+ R_ARM_THM_MOVT_ABS = 48, // Static Thumb32 S + A - P
+ R_ARM_THM_MOVW_PREL_NC = 49, // Static Thumb32 ((S + A) | T) - P
+ R_ARM_THM_MOVT_PREL = 50, // Static Thumb32 S + A - P
+ R_ARM_THM_JUMP19 = 51, // Static Thumb32 ((S + A) | T) - P
+ R_ARM_THM_JUMP6 = 52, // Static Thumb16 S + A - P
+ R_ARM_THM_ALU_PREL_11_0 = 53, // Static Thumb32 ((S + A) | T) - Pa
+ R_ARM_THM_PC12 = 54, // Static Thumb32 S + A - Pa
+ R_ARM_ABS32_NOI = 55, // Static Data S + A
+ R_ARM_REL32_NOI = 56, // Static Data S + A - P
+ R_ARM_ALU_PC_G0_NC = 57, // Static ARM ((S + A) | T) - P
+ R_ARM_ALU_PC_G0 = 58, // Static ARM ((S + A) | T) - P
+ R_ARM_ALU_PC_G1_NC = 59, // Static ARM ((S + A) | T) - P
+ R_ARM_ALU_PC_G1 = 60, // Static ARM ((S + A) | T) - P
+ R_ARM_ALU_PC_G2 = 61, // Static ARM ((S + A) | T) - P
+ R_ARM_LDR_PC_G1 = 62, // Static ARM S + A - P
+ R_ARM_LDR_PC_G2 = 63, // Static ARM S + A - P
+ R_ARM_LDRS_PC_G0 = 64, // Static ARM S + A - P
+ R_ARM_LDRS_PC_G1 = 65, // Static ARM S + A - P
+ R_ARM_LDRS_PC_G2 = 66, // Static ARM S + A - P
+ R_ARM_LDC_PC_G0 = 67, // Static ARM S + A - P
+ R_ARM_LDC_PC_G1 = 68, // Static ARM S + A - P
+ R_ARM_LDC_PC_G2 = 69, // Static ARM S + A - P
+ R_ARM_ALU_SB_G0_NC = 70, // Static ARM ((S + A) | T) - B(S)
+ R_ARM_ALU_SB_G0 = 71, // Static ARM ((S + A) | T) - B(S)
+ R_ARM_ALU_SB_G1_NC = 72, // Static ARM ((S + A) | T) - B(S)
+ R_ARM_ALU_SB_G1 = 73, // Static ARM ((S + A) | T) - B(S)
+ R_ARM_ALU_SB_G2 = 74, // Static ARM ((S + A) | T) - B(S)
+ R_ARM_LDR_SB_G0 = 75, // Static ARM S + A - B(S)
+ R_ARM_LDR_SB_G1 = 76, // Static ARM S + A - B(S)
+ R_ARM_LDR_SB_G2 = 77, // Static ARM S + A - B(S)
+ R_ARM_LDRS_SB_G0 = 78, // Static ARM S + A - B(S)
+ R_ARM_LDRS_SB_G1 = 79, // Static ARM S + A - B(S)
+ R_ARM_LDRS_SB_G2 = 80, // Static ARM S + A - B(S)
+ R_ARM_LDC_SB_G0 = 81, // Static ARM S + A - B(S)
+ R_ARM_LDC_SB_G1 = 82, // Static ARM S + A - B(S)
+ R_ARM_LDC_SB_G2 = 83, // Static ARM S + A - B(S)
+ R_ARM_MOVW_BREL_NC = 84, // Static ARM ((S + A) | T) - B(S)
+ R_ARM_MOVT_BREL = 85, // Static ARM S + A - B(S)
+ R_ARM_MOVW_BREL = 86, // Static ARM ((S + A) | T) - B(S)
+ R_ARM_THM_MOVW_BREL_NC = 87, // Static Thumb32 ((S + A) | T) - B(S)
+ R_ARM_THM_MOVT_BREL = 88, // Static Thumb32 S + A - B(S)
+ R_ARM_THM_MOVW_BREL = 89, // Static Thumb32 ((S + A) | T) - B(S)
+ R_ARM_TLS_GOTDESC = 90, // Static Data
+ R_ARM_TLS_CALL = 91, // Static ARM
+ R_ARM_TLS_DESCSEQ = 92, // Static ARM TLS relaxation
+ R_ARM_THM_TLS_CALL = 93, // Static Thumb32
+ R_ARM_PLT32_ABS = 94, // Static Data PLT(S) + A
+ R_ARM_GOT_ABS = 95, // Static Data GOT(S) + A
+ R_ARM_GOT_PREL = 96, // Static Data GOT(S) + A - P
+ R_ARM_GOT_BREL12 = 97, // Static ARM GOT(S) + A - GOT_ORG
+ R_ARM_GOTOFF12 = 98, // Static ARM S + A - GOT_ROG
+ R_ARM_GOTRELAX = 99, // Static Misc
+ R_ARM_GNU_VTENTRY = 100, // Deprecated Data
+ R_ARM_GNU_VTINHERIT = 101, // Deprecated Data
+ R_ARM_THM_JUMP11 = 102, // Static Thumb16 S + A - P
+ R_ARM_THM_JUMP8 = 103, // Static Thumb16 S + A - P
+ R_ARM_TLS_GD32 = 104, // Static Data GOT(S) + A - P
+ R_ARM_TLS_LDM32 = 105, // Static Data GOT(S) + A - P
+ R_ARM_TLS_LDO32 = 106, // Static Data S + A - TLS
+ R_ARM_TLS_IE32 = 107, // Static Data GOT(S) + A - P
+ R_ARM_TLS_LE32 = 108, // Static Data S + A - tp
+ R_ARM_TLS_LDO12 = 109, // Static ARM S + A - TLS
+ R_ARM_TLS_LE12 = 110, // Static ARM S + A - tp
+ R_ARM_TLS_IE12GP = 111, // Static ARM GOT(S) + A - GOT_ORG
+ R_ARM_PRIVATE_0 = 112, // Private (n = 0, 1, ... 15)
+ R_ARM_PRIVATE_1 = 113,
+ R_ARM_PRIVATE_2 = 114,
+ R_ARM_PRIVATE_3 = 115,
+ R_ARM_PRIVATE_4 = 116,
+ R_ARM_PRIVATE_5 = 117,
+ R_ARM_PRIVATE_6 = 118,
+ R_ARM_PRIVATE_7 = 119,
+ R_ARM_PRIVATE_8 = 120,
+ R_ARM_PRIVATE_9 = 121,
+ R_ARM_PRIVATE_10 = 122,
+ R_ARM_PRIVATE_11 = 123,
+ R_ARM_PRIVATE_12 = 124,
+ R_ARM_PRIVATE_13 = 125,
+ R_ARM_PRIVATE_14 = 126,
+ R_ARM_PRIVATE_15 = 127,
+ R_ARM_ME_TOO = 128, // Obsolete
+ R_ARM_THM_TLS_DESCSEQ16 = 129,// Static Thumb16
+ R_ARM_THM_TLS_DESCSEQ32 = 130,// Static Thumb32
+ // 131 - 139 Unallocated
+ // 140 - 159 Dynamic Reserved for future allocation
+ // 160 - 255 Unallocated
+};
+
+} // End namespace elfcpp.
+
+#endif // !defined(ELFCPP_ARM_H)
Index: elfcpp/elfcpp.h
===================================================================
RCS file: /cvs/src/src/elfcpp/elfcpp.h,v
retrieving revision 1.22
diff -u -u -p -r1.22 elfcpp.h
--- elfcpp/elfcpp.h 30 Apr 2009 15:47:11 -0000 1.22
+++ elfcpp/elfcpp.h 27 May 2009 01:47:58 -0000
@@ -371,6 +371,17 @@ enum SHT
SHT_SPARC_GOTDATA = 0x70000000,
+ // ARM-specific section types.
+ // Exception Index table.
+ SHT_ARM_EXIDX = 0x70000001,
+ // BPABI DLL dynamic linking pre-emption map.
+ SHT_ARM_PREEMPTMAP = 0x70000002,
+ // Object file compatibility attributes.
+ SHT_ARM_ATTRIBUTES = 0x70000003,
+ // Support for debugging overlaid programs.
+ SHT_ARM_DEBUGOVERLAY = 0x70000004,
+ SHT_ARM_OVERLAYSECTION = 0x70000005,
+
// Link editor is to sort the entries in this section based on the
// address specified in the associated symbol table entry.
SHT_ORDERED = 0x7fffffff,
@@ -439,7 +450,11 @@ enum PT
// Stack flags.
PT_GNU_STACK = 0x6474e551,
// Read only after relocation.
- PT_GNU_RELRO = 0x6474e552
+ PT_GNU_RELRO = 0x6474e552,
+ // Platform architecture compatibility information
+ PT_ARM_ARCHEXT = 0x70000000,
+ // Exception unwind tables
+ PT_ARM_EXIDX = 0x70000001
};
// The valid bit flags found in the Phdr p_flags field.
@@ -486,6 +501,10 @@ enum STT
// The section type that must be used for register symbols on
// Sparc. These symbols initialize a global register.
STT_SPARC_REGISTER = 13,
+
+ // ARM: a THUMB function. This is not defined in ARM ELF Specification but
+ // used by the GNU tool-chain.
+ STT_ARM_TFUNC = 13,
};
inline STB
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