This file contains ELF32/HPPA relocation support as specified
in the Stratus FTX/Golf Object File Format (SED-1762) dated
- November 19, 1992.
+ February 1994.
- Copyright (C) 1990-1991 Free Software Foundation, Inc.
+ Copyright (C) 1990-2020 Free Software Foundation, Inc.
Written by:
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+ Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+ MA 02110-1301, USA. */
#ifndef _ELF32_HPPA_H
#define _ELF32_HPPA_H
-#include "libelf.h"
+#include "elf-bfd.h"
#include "libhppa.h"
+#include "elf/hppa.h"
-/* ELF/HPPA relocation types */
+#ifdef __cplusplus
+extern "C" {
+#endif
-typedef enum
- {
- /* 9.3.4. Address relocation types
- These relocation types do simple base + offset relocations.
+void elf32_hppa_init_stub_bfd
+ (bfd *, struct bfd_link_info *);
- By convention, relocation type zero is always "no relocation",
- while type one is 32-bit word relocation. */
+int elf32_hppa_setup_section_lists
+ (bfd *, struct bfd_link_info *);
- R_HPPA_NONE, /* - - */
- R_HPPA_32, /* Symbol + Addend 32 */
- R_HPPA_11, /* Symbol + Addend 11 */
- R_HPPA_14, /* Symbol + Addend 11 */
- R_HPPA_17, /* Symbol + Addend 11 */
- R_HPPA_L21, /* L (Symbol, Addend) 21 */
- R_HPPA_R11, /* R (Symbol, Addend) 11 */
- R_HPPA_R14, /* R (Symbol, Addend) 14 */
- R_HPPA_R17, /* R (Symbol, Addend) 17 */
- R_HPPA_LS21, /* LS(Symbol, Addend) 21 */
- R_HPPA_RS11, /* RS(Symbol, Addend) 11 */
- R_HPPA_RS14, /* RS(Symbol, Addend) 14 */
- R_HPPA_RS17, /* RS(Symbol, Addend) 17 */
- R_HPPA_LD21, /* LD(Symbol, Addend) 21 */
- R_HPPA_RD11, /* RD(Symbol, Addend) 11 */
- R_HPPA_RD14, /* RD(Symbol, Addend) 14 */
- R_HPPA_RD17, /* RD(Symbol, Addend) 17 */
- R_HPPA_LR21, /* LR(Symbol, Addend) 21 */
- R_HPPA_RR14, /* RR(Symbol, Addend) 14 */
- R_HPPA_RR17, /* RR(Symbol, Addend) 17 */
+void elf32_hppa_next_input_section
+ (struct bfd_link_info *, asection *);
- /* 9.3.5. GOTOFF address relocation types
+bfd_boolean elf32_hppa_size_stubs
+ (bfd *, bfd *, struct bfd_link_info *, bfd_boolean, bfd_signed_vma,
+ asection * (*) (const char *, asection *), void (*) (void));
- The Global Offset Table (GOT) is a table of pointers to data, but
- its address can also be used as a base pointer to address data,
- similar to the way the DP is used in HP/UX. The expression
- calculation yields a signed offset of an address from the GOT. */
+bfd_boolean elf32_hppa_set_gp
+ (bfd *, struct bfd_link_info *);
- R_HPPA_GOTOFF_11, /* Symbol - GOT + Addend 11 */
- R_HPPA_GOTOFF_14, /* Symbol - GOT + Addend 14 */
- R_HPPA_GOTOFF_L21, /* L (Sym - GOT, Addend) 21 */
- R_HPPA_GOTOFF_R11, /* R (Sym - GOT, Addend) 11 */
- R_HPPA_GOTOFF_R14, /* R (Sym - GOT, Addend) 14 */
- R_HPPA_GOTOFF_LS21, /* LS(Sym - GOT, Addend) 21 */
- R_HPPA_GOTOFF_RS11, /* RS(Sym - GOT, Addend) 11 */
- R_HPPA_GOTOFF_RS14, /* RS(Sym - GOT, Addend) 14 */
- R_HPPA_GOTOFF_LD21, /* LD(Sym - GOT, Addend) 21 */
- R_HPPA_GOTOFF_RD11, /* RD(Sym - GOT, Addend) 11 */
- R_HPPA_GOTOFF_RD14, /* RD(Sym - GOT, Addend) 14 */
- R_HPPA_GOTOFF_LR21, /* LR(Sym - GOT, Addend) 21 */
- R_HPPA_GOTOFF_RR14, /* RR(Sym - GOT, Addend) 14 */
+bfd_boolean elf32_hppa_build_stubs
+ (struct bfd_link_info *);
- /* 9.3.6. Absolute call relocation types
+elf_hppa_reloc_type elf32_hppa_reloc_final_type
+ (bfd *, elf_hppa_reloc_type, int, unsigned int);
- Relocations of function calls must be accompanied by parameter
- relocation information. This information is carried in the ten
- high-order bits of the addend field. The remaining 22 bits of
- of the addend field are sign-extended to form the Addend.
-
- Note the code to build argument relocations depends on the
- addend being zero. A consequence of this limitation is GAS
- can not perform relocation reductions for function symbols. */
-
- R_HPPA_ABS_CALL_11, /* Symbol + Addend 11 */
- R_HPPA_ABS_CALL_14, /* Symbol + Addend 14 */
- R_HPPA_ABS_CALL_17, /* Symbol + Addend 17 */
- R_HPPA_ABS_CALL_L21, /* L (Symbol, Addend) 21 */
- R_HPPA_ABS_CALL_R11, /* R (Symbol, Addend) 11 */
- R_HPPA_ABS_CALL_R14, /* R (Symbol, Addend) 14 */
- R_HPPA_ABS_CALL_R17, /* R (Symbol, Addend) 17 */
- R_HPPA_ABS_CALL_LS21, /* LS(Symbol, Addend) 21 */
- R_HPPA_ABS_CALL_RS11, /* RS(Symbol, Addend) 11 */
- R_HPPA_ABS_CALL_RS14, /* RS(Symbol, Addend) 14 */
- R_HPPA_ABS_CALL_RS17, /* RS(Symbol, Addend) 17 */
- R_HPPA_ABS_CALL_LD21, /* LD(Symbol, Addend) 21 */
- R_HPPA_ABS_CALL_RD11, /* RD(Symbol, Addend) 11 */
- R_HPPA_ABS_CALL_RD14, /* RD(Symbol, Addend) 14 */
- R_HPPA_ABS_CALL_RD17, /* RD(Symbol, Addend) 17 */
- R_HPPA_ABS_CALL_LR21, /* LR(Symbol, Addend) 21 */
- R_HPPA_ABS_CALL_RR14, /* RR(Symbol, Addend) 14 */
- R_HPPA_ABS_CALL_RR17, /* RR(Symbol, Addend) 17 */
-
- /* 9.3.7. PC-relative call relocation types
-
- PC-relative relocation calculates the difference between an address
- and the location being relocated. This is most often used to
- relocate pc-relative calls. They are otherwise identical to
- their corresponding absolute call relocations. */
-
- R_HPPA_PCREL_CALL_11, /* Symbol - PC + Addend 11 */
- R_HPPA_PCREL_CALL_14, /* Symbol - PC + Addend 14 */
- R_HPPA_PCREL_CALL_17, /* Symbol - PC + Addend 17 */
- R_HPPA_PCREL_CALL_12, /* Symbol - PC + Addend 12 */
- R_HPPA_PCREL_CALL_L21, /* L (Symbol - PC, Addend) 21 */
- R_HPPA_PCREL_CALL_R11, /* R (Symbol - PC, Addend) 11 */
- R_HPPA_PCREL_CALL_R14, /* R (Symbol - PC, Addend) 14 */
- R_HPPA_PCREL_CALL_R17, /* R (Symbol - PC, Addend) 17 */
- R_HPPA_PCREL_CALL_LS21, /* LS(Symbol - PC, Addend) 21 */
- R_HPPA_PCREL_CALL_RS11, /* RS(Symbol - PC, Addend) 11 */
- R_HPPA_PCREL_CALL_RS14, /* RS(Symbol - PC, Addend) 14 */
- R_HPPA_PCREL_CALL_RS17, /* RS(Symbol - PC, Addend) 17 */
- R_HPPA_PCREL_CALL_LD21, /* LD(Symbol - PC, Addend) 21 */
- R_HPPA_PCREL_CALL_RD11, /* RD(Symbol - PC, Addend) 11 */
- R_HPPA_PCREL_CALL_RD14, /* RD(Symbol - PC, Addend) 14 */
- R_HPPA_PCREL_CALL_RD17, /* RD(Symbol - PC, Addend) 17 */
- R_HPPA_PCREL_CALL_LR21, /* LR(Symbol - PC, Addend) 21 */
- R_HPPA_PCREL_CALL_RR14, /* RR(Symbol - PC, Addend) 14 */
- R_HPPA_PCREL_CALL_RR17, /* RR(Symbol - PC, Addend) 17 */
-
- /* 9.3.8. Plabel relocation types
-
- Plabels are designed to allow code pointers to be passed between
- spaces.
-
- Plabels are procedure markers. They are used to denote relocations
- which involve procedures (call, loading the address of a procedure,
- etc). They are necessary for the proper functioning of argument
- relocations. The addend of the relocation should be either 0 (no
- static link) or 2 (static link required). These relocations
- correspond to the P%, LP% and RP% field selectors. */
-
- R_HPPA_PLABEL_32, /* F(Plabel(Symbol,Addend),0) 32 */
- R_HPPA_PLABEL_11, /* F(Plabel(Symbol,Addend),0) 11 */
- R_HPPA_PLABEL_14, /* F(Plabel(Symbol,Addend),0) 14 */
- R_HPPA_PLABEL_L21, /* L(Plabel(Symbol,Addend),0) 21 */
- R_HPPA_PLABEL_R11, /* R(Plabel(Symbol,Addend),0) 11 */
- R_HPPA_PLABEL_R14, /* R(Plabel(Symbol,Addend),0) 14 */
-
- /* 9.3.9. Data linkage table (DLT) relocation types
-
- SOM DLT_REL fixup requests are used to for static data references
- from position-independent code within shared libraries. They are
- similar to the GOT relocation types in some SVR4 implementations. */
-
- R_HPPA_DLT_32, /* F(DLTOFF) 32 */
- R_HPPA_DLT_11, /* F(DLTOFF) 11 */
- R_HPPA_DLT_14, /* F(DLTOFF) 14 */
- R_HPPA_DLT_L21, /* L(DLTOFF) 21 */
- R_HPPA_DLT_R11, /* R(DLTOFF) 11 */
- R_HPPA_DLT_R14, /* R(DLTOFF) 14 */
-
- /* 9.3.10. Relocations for unwinder tables
-
- The unwinder table consists of a series of four-word entries, the
- first two of which are a pair of code addresses. While it would be
- possible to relocate this table using just R_HPPA_32, the amount of
- relocation data resulting would be very large. To reduce that data,
- the following relocation types have been defined.
-
- The first, R_HPPA_UNWIND_ENTRY, merely compresses two R_HPPA_32
- operations into one. It is designed for use in .rel-type
- relocations, where the two 32-bit addends are taken from the unwind
- section itself.
-
- The second, which is designed for use in .rela-type relocations, is
- designed to relocate an entire unwinder table with one relocation
- entry. It has the effect of multiple R_HPPA_UNWIND_ENTRY
- relocations applied to successive unwinder table entries. The
- number of entries to be relocated is given in the r_addend field of
- the relocation entry. The rest of the relocation entry is used in
- a normal way--r_offset is the offset of the first unwind entry in
- the section, while ELF32_R_SYM(r_info) is the code section that all
- the code addresses should be relocated from.
-
- Why can't we use begin/end markers + unwind description bits like
- som? FIXME! */
-
- R_HPPA_UNWIND_ENTRY, /* "128" */
- R_HPPA_UNWIND_ENTRIES, /* Addend * "128" */
-
- /* 9.3.11. Relocation types for complex expressions
-
- New-format SOM fixups support complex expressions by spreading
- the parts of the expression across multiple entries. ELF for
- HPPA will have a similar mechanism, although support for it may
- be optional. There are two main reasons for defining it: first,
- the need to translate complex SOM fixup expressions to ELF, and
- second, to cover combinations of expression, field and format not
- available with other relocation types.
-
- ELF expression relocation entries are interpreted as postfix-form
- expressions. They may be evaluated using a push-down stack.
-
- Usually, the addend field of these expression relocation entries is
- unused, with the following exceptions:
-
- R_HPPA_PUSH_CONST: The addend field contains the constant.
-
- R_HPPA_PUSH_PROC: The high-order 10 bits of the addend field
- contain parameter relocation information. The rest ofthe addend
- field is unused.
-
- R_HPPA_LSHIFT, R_HPPA_ARITH_RSHIFT and R_HPPA_LOGIC_RSHIFT:
- The addend field normally gives the amount to shift.
- However, if that amount is zero, the shift amount is
- popped from the top of the stack prior to popping the
- amount to be shifted. */
-
- R_HPPA_PUSH_CONST, /* push Addend - - */
- R_HPPA_PUSH_PC, /* push PC + Addend - - */
- R_HPPA_PUSH_SYM, /* push Symbol + Addend - - */
- R_HPPA_PUSH_GOTOFF, /* push Symbol - GOT + Addend - - */
- R_HPPA_PUSH_ABS_CALL, /* push Symbol + Addend - - */
- R_HPPA_PUSH_PCREL_CALL, /* push Symbol - PC + Addend - - */
- R_HPPA_PUSH_PLABEL, /* push Plabel(Symbol) - - */
- R_HPPA_MAX, /* pop A and B, push max(B,A) - - */
- R_HPPA_MIN, /* pop A and B, push min(B,A) - - */
- R_HPPA_ADD, /* pop A and B, push B + A - - */
- R_HPPA_SUB, /* pop A and B, push B - A - - */
- R_HPPA_MULT, /* pop A and B, push B * A - - */
- R_HPPA_DIV, /* pop A and B, push B / A - - */
- R_HPPA_MOD, /* pop A and B, push B % A - - */
- R_HPPA_AND, /* pop A and B, push B & A - - */
- R_HPPA_OR, /* pop A and B, push B | A - - */
- R_HPPA_XOR, /* pop A and B, push B ^ A - - */
- R_HPPA_NOT, /* pop A, push ~A - - */
- R_HPPA_LSHIFT, /* pop A, push A << Addend - - */
- R_HPPA_ARITH_RSHIFT, /* pop A, push A >> Addend - - */
- R_HPPA_LOGIC_RSHIFT, /* pop A, push A >> Addend - - */
- R_HPPA_EXPR_F, /* pop A, push A + Addend F - */
- R_HPPA_EXPR_L, /* pop A, push L(A,Addend) L - */
- R_HPPA_EXPR_R, /* pop A, push R(A,Addend) R - */
- R_HPPA_EXPR_LS, /* pop A, push LS(A,Addend) LS - */
- R_HPPA_EXPR_RS, /* pop A, push RS(A,Addend) RS - */
- R_HPPA_EXPR_LD, /* pop A, push LD(A,Addend) LD - */
- R_HPPA_EXPR_RD, /* pop A, push RD(A,Addend) RD - */
- R_HPPA_EXPR_LR, /* pop A, push LR(A,Addend) LR - */
- R_HPPA_EXPR_RR, /* pop A, push RR(A,Addend) RR - */
- R_HPPA_EXPR_32, /* pop - 32 */
- R_HPPA_EXPR_21, /* pop - 21 */
- R_HPPA_EXPR_11, /* pop - 11 */
- R_HPPA_EXPR_14, /* pop - 14 */
- R_HPPA_EXPR_17, /* pop - 17 */
- R_HPPA_EXPR_12, /* pop - 12 */
- R_HPPA_STUB_CALL_17, /* Symbol + Addend - 17 */
- R_HPPA_UNIMPLEMENTED /* N/A */
- }
-elf32_hppa_reloc_type;
-
-#define ELF_HOWTO_TABLE_SIZE R_HPPA_UNIMPLEMENTED + 1
-#define N_HPPA_RELOCS R_HPPA_UNIMPLEMENTED + 1
+extern elf_hppa_reloc_type ** _bfd_elf32_hppa_gen_reloc_type
+ (bfd *, elf_hppa_reloc_type, int, unsigned int, int, asymbol *);
/* Define groups of basic relocations. FIXME: These should
be the only basic relocations created by GAS. The rest
- should be internal to the BFD backend.
+ should be internal to the BFD backend.
The idea is both SOM and ELF define these basic relocation
- types so they map into a SOM or ELF specific relocation
+ types so they map into a SOM or ELF specific relocation
as appropriate. This allows GAS to share much more code
between the two target object formats. */
-#define R_HPPA R_HPPA_32
-#define R_HPPA_GOTOFF R_HPPA_GOTOFF_11
-#define R_HPPA_ABS_CALL R_HPPA_ABS_CALL_11
-#define R_HPPA_PCREL_CALL R_HPPA_PCREL_CALL_11
-#define R_HPPA_PLABEL R_HPPA_PLABEL_32
-#define R_HPPA_DLT R_HPPA_DLT_32
-#define R_HPPA_UNWIND R_HPPA_UNWIND_ENTRY
-#define R_HPPA_COMPLEX R_HPPA_PUSH_CONST
-#define R_HPPA_COMPLEX_PCREL_CALL R_HPPA_PUSH_CONST + 1
-#define R_HPPA_COMPLEX_ABS_CALL R_HPPA_PUSH_CONST + 2
-
-/* HPPA Section types */
-#define SHT_HPPA_SYMEXTN SHT_LOPROC
-
-/* HPPA Symbol types */
-#define STT_HPPA_PLABEL STT_LOPROC
-
-/* HPPA symbol table extension entry types */
-enum elf32_hppa_symextn_types
-{
- HPPA_SXT_NULL,
- HPPA_SXT_SYMNDX,
- HPPA_SXT_ARG_RELOC,
-};
-
-/* These macros compose and decompose the value of a symextn entry:
-
- entry_type = ELF32_HPPA_SX_TYPE(word);
- entry_value = ELF32_HPPA_SX_VAL(word);
- word = ELF32_HPPA_SX_WORD(type,val); */
-
-#define ELF32_HPPA_SX_TYPE(p) ((p) >> 24)
-#define ELF32_HPPA_SX_VAL(p) ((p) & 0xFFFFFF)
-#define ELF32_HPPA_SX_WORD(type,val) (((type) << 24) + (val & 0xFFFFFF))
-
-/* The following was added facilitate implementation of the .hppa_symextn
- section. This section is built after the symbol table is built in the
- elf_write_object_contents routine (called from bfd_close). It is built
- so late because it requires information that is not known until
- the symbol and string table sections have been allocated, and
- the symbol table has been built. */
-
-/* Number of "hand-made" target specific sections. */
-#define ELF_TC_FAKE_SECTIONS 1
-#define SYMEXTN_SECTION_NAME ".hppa_symextn"
-
-/* FIXME. Are these external? (For example used by GAS?). If so the
- names need to change to avoid namespace pollution, if not they should
- be moved into elf32-hppa.c. */
-typedef Elf32_Word symext_entryS;
-struct symext_chain
- {
- symext_entryS entry;
- struct symext_chain *next;
- };
-
-typedef struct symext_chain symext_chainS;
-
-void elf_hppa_tc_symbol
- PARAMS ((bfd *, elf_symbol_type *, int, symext_chainS **, symext_chainS **));
-
-elf32_hppa_reloc_type **hppa_elf_gen_reloc_type
- PARAMS ((bfd *, elf32_hppa_reloc_type, int, int));
-
-asymbol * hppa_look_for_stubs_in_section
- PARAMS ((bfd *, bfd *, bfd *, asection *,
- int *, struct bfd_link_info *));
+#define R_HPPA_NONE R_PARISC_NONE
+#define R_HPPA R_PARISC_DIR32
+#define R_HPPA_GOTOFF R_PARISC_DPREL21L
+#define R_HPPA_PCREL_CALL R_PARISC_PCREL21L
+#define R_HPPA_ABS_CALL R_PARISC_DIR17F
+#define R_HPPA_COMPLEX R_PARISC_UNIMPLEMENTED
-void elf_hppa_final_processing PARAMS ((void));
-void elf_hppa_tc_make_sections PARAMS ((bfd *, symext_chainS *));
+#ifdef __cplusplus
+}
+#endif
#endif /* _ELF32_HPPA_H */
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