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- /* Written by Ian Dall
- * 5-Jun-94
- * HISTORY
- * 05-Jun-94 Ian Dall (idall@eleceng.adelaide.edu.au) at University of Adelaide
- * This code was formerly in aout-pc532-mach.c. This organisations
- * is intended to allow multiple format support more easilly.
- *
- */
-
- #define BYTES_IN_WORD 4
-
- #include "bfd.h"
- #include "aout/aout64.h"
- #include "aout-ns32k.h"
- #define MY(OP) MYNS(OP)
-
-
- #define MY_swap_std_reloc_in MY(swap_std_reloc_in)
- #define MY_swap_std_reloc_out MY(swap_std_reloc_out)
-
- static void
- MY_swap_std_reloc_in PARAMS ((bfd *abfd, struct reloc_std_external *bytes,
- arelent *cache_ptr, asymbol **symbols));
-
- static void
- MY_swap_std_reloc_out PARAMS((bfd *abfd, arelent *g,
- struct reloc_std_external *natptr));
-
-
- /* The ns32k series is ah, unusual, when it comes to relocation.
- * There are three storage methods for relocateable objects. There
- * are displacements, immediate operands and ordinary twos complement
- * data. Of these, only the last fits into the standard relocation
- * scheme. Immediate operands are stored huffman encoded and
- * immediate operands are stored big endian (where as the natural byte
- * order is little endian for this achitecture).
-
- * Note that the ns32k displacement storage method is orthogonal to
- * whether the relocation is pc relative or not. The "displacement"
- * storage scheme is used for essentially all address constants. The
- * displacement can be relative to zero (absolute displacement),
- * relative to the pc (pc relative), the stack pointer, the frame
- * pointer, the static base register and general purpose register etc.
-
- * For example:
- *
- * sym1: .long . # pc relative 2's complement
- * sym1: .long foo # 2's complement not pc relative
- *
- * self: movd @self, r0 # pc relative displacement
- * movd foo, r0 # non pc relative displacement
- *
- * self: movd self, r0 # pc relative immediate
- * movd foo, r0 # non pc relative immediate
- *
- * In addition, for historical reasons the encoding of the relocation types
- * in the a.out format relocation entries is such that even the relocation
- * methods which are standard are not encoded the standard way.
- *
- */
-
-
- bfd_reloc_status_type
- ns32k_reloc_disp(bfd *abfd, arelent *reloc_entry,
- struct symbol_cache_entry *symbol,
- PTR data,
- asection *input_section,
- bfd *output_bfd,
- char **error_message);
- bfd_reloc_status_type
- ns32k_reloc_imm (bfd *abfd,
- arelent *reloc_entry,
- struct symbol_cache_entry *symbol,
- PTR data,
- asection *input_section,
- bfd *output_bfd,
- char **error_message);
- bfd_reloc_status_type
- ns32k_reloc_contents_disp (const reloc_howto_type *howto,
- bfd *input_bfd,
- bfd_vma relocation,
- bfd_byte *location);
- bfd_reloc_status_type
- ns32k_reloc_contents_imm (const reloc_howto_type *howto,
- bfd *input_bfd,
- bfd_vma relocation,
- bfd_byte *location);
-
- reloc_howto_type MY(howto_table)[] =
- {
- /* ns32k immediate operands */
- HOWTO2(BFD_RELOC_NS32K_IMM_8, 0, 0, 8, false, 0, true,
- ns32k_reloc_imm, ns32k_reloc_contents_imm,"NS32K_IMM_8",
- true, 0x000000ff,0x000000ff, false),
- HOWTO2(BFD_RELOC_NS32K_IMM_16, 0, 1, 16, false, 0, true,
- ns32k_reloc_imm, ns32k_reloc_contents_imm, "NS32K_IMM_16",
- true, 0x0000ffff,0x0000ffff, false),
- HOWTO2(BFD_RELOC_NS32K_IMM_32, 0, 2, 32, false, 0, true,
- ns32k_reloc_imm, ns32k_reloc_contents_imm,"NS32K_IMM_32",
- true, 0xffffffff,0xffffffff, false),
- HOWTO2(BFD_RELOC_NS32K_IMM_8_PCREL, 0, 0, 8, true, 0, false,
- ns32k_reloc_imm, ns32k_reloc_contents_imm,"PCREL_NS32K_IMM_8",
- true, 0x000000ff, 0x000000ff, false),
- HOWTO2(BFD_RELOC_NS32K_IMM_16_PCREL, 0, 1, 16, true, 0, false,
- ns32k_reloc_imm, ns32k_reloc_contents_imm,"PCREL_NS32K_IMM_16",
- true, 0x0000ffff,0x0000ffff, false),
- HOWTO2(BFD_RELOC_NS32K_IMM_32_PCREL, 0, 2, 32, true, 0, false,
- ns32k_reloc_imm, ns32k_reloc_contents_imm,"PCREL_NS32K_IMM_32",
- true, 0xffffffff,0xffffffff, false),
-
- /* ns32k displacements */
- HOWTO2(BFD_RELOC_NS32K_DISP_8, 0, 0, 8, false, 0, true,
- ns32k_reloc_disp, ns32k_reloc_contents_disp,"NS32K_DISP_8",
- true, 0x000000ff,0x000000ff, false),
- HOWTO2(BFD_RELOC_NS32K_DISP_16, 0, 1, 16, false, 0, true,
- ns32k_reloc_disp, ns32k_reloc_contents_disp,"NS32K_DISP_16",
- true, 0x0000ffff, 0x0000ffff, false),
- HOWTO2(BFD_RELOC_NS32K_DISP_32, 0, 2, 32, false, 0, true,
- ns32k_reloc_disp, ns32k_reloc_contents_disp,"NS32K_DISP_32",
- true, 0xffffffff, 0xffffffff, false),
- HOWTO2(BFD_RELOC_NS32K_DISP_8_PCREL, 0, 0, 8, true, 0, false,
- ns32k_reloc_disp, ns32k_reloc_contents_disp,"PCREL_NS32K_DISP_8",
- true, 0x000000ff,0x000000ff, false),
- HOWTO2(BFD_RELOC_NS32K_DISP_16_PCREL, 0, 1, 16, true, 0, false,
- ns32k_reloc_disp, ns32k_reloc_contents_disp,"PCREL_NS32K_DISP_16",
- true, 0x0000ffff,0x0000ffff, false),
- HOWTO2(BFD_RELOC_NS32K_DISP_32_PCREL, 0, 2, 32, true, 0, false,
- ns32k_reloc_disp, ns32k_reloc_contents_disp,"PCREL_NS32K_DISP_32",
- true, 0xffffffff,0xffffffff, false),
-
- /* Normal 2's complement */
- HOWTO(BFD_RELOC_8, 0, 0, 8, false, 0, complain_overflow_bitfield,0,
- "8", true, 0x000000ff,0x000000ff, false),
- HOWTO(BFD_RELOC_16, 0, 1, 16, false, 0, complain_overflow_bitfield,0,
- "16", true, 0x0000ffff,0x0000ffff, false),
- HOWTO(BFD_RELOC_32, 0, 2, 32, false, 0, complain_overflow_bitfield,0,
- "32", true, 0xffffffff,0xffffffff, false),
- HOWTO(BFD_RELOC_8_PCREL, 0, 0, 8, true, 0, complain_overflow_signed, 0,
- "PCREL_8", true, 0x000000ff,0x000000ff, false),
- HOWTO(BFD_RELOC_16_PCREL, 0, 1, 16, true, 0, complain_overflow_signed, 0,
- "PCREL_16", true, 0x0000ffff,0x0000ffff, false),
- HOWTO(BFD_RELOC_32_PCREL, 0, 2, 32, true, 0, complain_overflow_signed, 0,
- "PCREL_32", true, 0xffffffff,0xffffffff, false),
- };
-
- #define MY_reloc_howto(BFD,REL,IN,EX,PC) ({ \
- unsigned int r_length; \
- int r_ns32k_type; \
- BFD_ASSERT((BFD)->xvec->header_byteorder_big_p == false); \
- IN = ((REL)->r_index[2] << 16) \
- | ((REL)->r_index[1] << 8) \
- | (REL)->r_index[0]; \
- EX = (0 != ((REL)->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE)); \
- PC = (0 != ((REL)->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE)); \
- r_length = ((REL)->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE) \
- >> RELOC_STD_BITS_LENGTH_SH_LITTLE; \
- r_ns32k_type = ((REL)->r_type[0] & RELOC_STD_BITS_NS32K_TYPE_LITTLE) \
- >> RELOC_STD_BITS_NS32K_TYPE_SH_LITTLE; \
- MY(howto_table) + r_length + 3 * (PC) + 6 * r_ns32k_type;})
-
- #define MY_put_reloc(BFD, EXT, IDX, VAL, HOWTO, RELOC) { \
- unsigned int r_length; \
- int r_pcrel; \
- int r_ns32k_type; \
- PUT_WORD ((BFD), (VAL), (RELOC)->r_address); \
- r_length = (HOWTO)->size ; /* Size as a power of two */ \
- r_pcrel = (int) (HOWTO)->pc_relative; /* Relative to PC? */ \
- r_ns32k_type = ((HOWTO) - MY(howto_table) )/6; \
- BFD_ASSERT ((BFD)->xvec->header_byteorder_big_p == false); \
- (RELOC)->r_index[2] = (IDX) >> 16; \
- (RELOC)->r_index[1] = (IDX) >> 8; \
- (RELOC)->r_index[0] = (IDX); \
- (RELOC)->r_type[0] = \
- ((EXT)? RELOC_STD_BITS_EXTERN_LITTLE: 0) \
- | (r_pcrel? RELOC_STD_BITS_PCREL_LITTLE: 0) \
- | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE) \
- | (r_ns32k_type << RELOC_STD_BITS_NS32K_TYPE_SH_LITTLE);}
-
-
- #define RELOC_STD_BITS_NS32K_TYPE_BIG 0x06
- #define RELOC_STD_BITS_NS32K_TYPE_LITTLE 0x60
- #define RELOC_STD_BITS_NS32K_TYPE_SH_BIG 1
- #define RELOC_STD_BITS_NS32K_TYPE_SH_LITTLE 5
-
- #define STAT_FOR_EXEC
- #include <aoutx.h>
-
- CONST struct reloc_howto_struct *
- DEFUN(MY(bfd_reloc_type_lookup),(abfd,code),
- bfd *abfd AND
- bfd_reloc_code_real_type code)
- {
- #define ENTRY(i,j) case i: return &MY(howto_table)[j]
- int ext = obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE;
- BFD_ASSERT(ext == 0);
- if (code == BFD_RELOC_CTOR)
- switch (bfd_get_arch_info (abfd)->bits_per_address)
- {
- case 32:
- code = BFD_RELOC_32;
- break;
- }
- switch (code)
- {
- ENTRY(BFD_RELOC_NS32K_IMM_8, 0);
- ENTRY(BFD_RELOC_NS32K_IMM_16, 1);
- ENTRY(BFD_RELOC_NS32K_IMM_32, 2);
- ENTRY(BFD_RELOC_NS32K_IMM_8_PCREL, 3);
- ENTRY(BFD_RELOC_NS32K_IMM_16_PCREL, 4);
- ENTRY(BFD_RELOC_NS32K_IMM_32_PCREL, 5);
- ENTRY(BFD_RELOC_NS32K_DISP_8, 6);
- ENTRY(BFD_RELOC_NS32K_DISP_16, 7);
- ENTRY(BFD_RELOC_NS32K_DISP_32, 8);
- ENTRY(BFD_RELOC_NS32K_DISP_8_PCREL, 9);
- ENTRY(BFD_RELOC_NS32K_DISP_16_PCREL, 10);
- ENTRY(BFD_RELOC_NS32K_DISP_32_PCREL, 11);
- ENTRY(BFD_RELOC_8, 12);
- ENTRY(BFD_RELOC_16, 13);
- ENTRY(BFD_RELOC_32, 14);
- ENTRY(BFD_RELOC_8_PCREL, 15);
- ENTRY(BFD_RELOC_16_PCREL, 16);
- ENTRY(BFD_RELOC_32_PCREL, 17);
- default: return (CONST struct reloc_howto_struct *) 0;
- }
- #undef ENTRY
- }
-
-
- static void
- DEFUN(MY_swap_std_reloc_in, (abfd, bytes, cache_ptr, symbols),
- bfd *abfd AND
- struct reloc_std_external *bytes AND
- arelent *cache_ptr AND
- asymbol **symbols)
- {
- int r_index;
- int r_extern;
- unsigned int r_length;
- int r_pcrel;
- int r_ns32k_type;
- struct aoutdata *su = &(abfd->tdata.aout_data->a);
-
- cache_ptr->address = bfd_h_get_32 (abfd, bytes->r_address);
-
- /* now the fun stuff */
-
- cache_ptr->howto = MY_reloc_howto(abfd, bytes, r_index, r_extern, r_pcrel);
-
- MOVE_ADDRESS(0);
- }
-
-
- static void
- DEFUN(MY_swap_std_reloc_out,(abfd, g, natptr),
- bfd *abfd AND
- arelent *g AND
- struct reloc_std_external *natptr)
- {
- int r_index;
- asymbol *sym = *(g->sym_ptr_ptr);
- int r_extern;
- unsigned int r_length;
- int r_pcrel;
- int r_ns32k_type;
- unsigned int r_addend;
- asection *output_section = sym->section->output_section;
-
-
- r_addend = g->addend + (*(g->sym_ptr_ptr))->section->output_section->vma;
-
- /* name was clobbered by aout_write_syms to be symbol index */
-
- /* If this relocation is relative to a symbol then set the
- r_index to the symbols index, and the r_extern bit.
-
- Absolute symbols can come in in two ways, either as an offset
- from the abs section, or as a symbol which has an abs value.
- check for that here
- */
-
-
- if (bfd_is_com_section (output_section)
- || output_section == &bfd_abs_section
- || output_section == &bfd_und_section)
- {
- if (bfd_abs_section.symbol == sym)
- {
- /* Whoops, looked like an abs symbol, but is really an offset
- from the abs section */
- r_index = 0;
- r_extern = 0;
- }
- else
- {
- /* Fill in symbol */
- r_extern = 1;
- #define KEEPIT flags
- r_index = stoi((*(g->sym_ptr_ptr))->KEEPIT);
- #undef KEEPIT
- }
- }
- else
- {
- /* Just an ordinary section */
- r_extern = 0;
- r_index = output_section->target_index;
- }
-
- MY_put_reloc(abfd, r_extern, r_index, g->address, g->howto, natptr);
- }
-