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Diffstat (limited to 'bfd/arc-plt.h')
| -rw-r--r-- | bfd/arc-plt.h | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/bfd/arc-plt.h b/bfd/arc-plt.h new file mode 100644 index 0000000..fec461d --- /dev/null +++ b/bfd/arc-plt.h @@ -0,0 +1,196 @@ +/* ARC-specific header file for PLT support. + Copyright (C) 2016 Free Software Foundation, Inc. + Contributed by Cupertino Miranda (cmiranda@synopsys.com). + + This file is part of BFD, the Binary File Descriptor library. + + 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 3 of the License, or + (at your option) any later version. + + 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 General Public License for more details. + + 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., 51 Franklin Street - Fifth Floor, Boston, + MA 02110-1301, USA. */ + +#ifndef ARC_PLT_H +#define ARC_PLT_H + +#include <stdint.h> + +/* Instructions appear in memory as a sequence of half-words (16 bit); + individual half-words are represented on the target in target byte order. + We use 'unsigned short' on the host to represent the PLT templates, + and translate to target byte order as we copy to the target. */ +typedef uint16_t insn_hword; + +enum plt_reloc_symbol +{ + LAST_RELOC = 0, + + SGOT = 1, + + RELATIVE = (1 << 8), + RELATIVE_INSN_32 = (1 << 9), + RELATIVE_INSN_24 = (1 << 10), + + MIDDLE_ENDIAN = (1 << 11) +}; + +#define IS_RELATIVE(S) ((S & (RELATIVE | RELATIVE_INSN_24 | RELATIVE_INSN_32)) != 0) +#define IS_INSN_32(S) ((S & RELATIVE_INSN_32) != 0) +#define IS_INSN_24(S) ((S & RELATIVE_INSN_24) != 0) +#define IS_MIDDLE_ENDIAN(S) ((S & MIDDLE_ENDIAN) != 0) +#define SYM_ONLY(S) (S & 0xFF) + +struct plt_reloc +{ + bfd_vma offset; + bfd_vma size; + bfd_vma mask; + enum plt_reloc_symbol symbol; + bfd_vma addend; +}; + + +#define PLT_TYPE_START(NAME) NAME, +#define PLT_TYPE_END(NAME) +#define PLT_ENTRY(...) +#define PLT_ELEM(...) +#define ENTRY_RELOC(...) +#define ELEM_RELOC(...) + +enum plt_types_enum +{ + PLT_START = -1, +#include "arc-plt.def" + PLT_MAX +}; + +#undef PLT_TYPE_START +#undef PLT_TYPE_END +#undef PLT_ENTRY +#undef PLT_ELEM +#undef ENTRY_RELOC +#undef ELEM_RELOC + +typedef insn_hword insn_hword_array[]; + +struct plt_version_t +{ + const insn_hword_array *entry; + const bfd_vma entry_size; + const insn_hword_array *elem; + const bfd_vma elem_size; + + const struct plt_reloc *entry_relocs; + const struct plt_reloc *elem_relocs; +}; + +#define PLT_TYPE_START(NAME) \ + const insn_hword NAME##_plt_entry[] = { +#define PLT_TYPE_END(NAME) }; +#define PLT_ENTRY(...) __VA_ARGS__, +#define PLT_ELEM(...) +#define ENTRY_RELOC(...) +#define ELEM_RELOC(...) + +#include "arc-plt.def" + +#undef PLT_TYPE_START +#undef PLT_TYPE_END +#undef PLT_ENTRY +#undef PLT_ELEM +#undef ENTRY_RELOC +#undef ELEM_RELOC + +#define PLT_TYPE_START(NAME) \ + const struct plt_reloc NAME##_plt_entry_relocs[] = { +#define PLT_TYPE_END(NAME) \ + {0, 0, 0, LAST_RELOC, 0} \ + }; +#define PLT_ENTRY(...) +#define PLT_ELEM(...) +#define ENTRY_RELOC(...) { __VA_ARGS__ }, +#define ELEM_RELOC(...) + +#include "arc-plt.def" + +#undef PLT_TYPE_START +#undef PLT_TYPE_END +#undef PLT_ENTRY +#undef PLT_ELEM +#undef ENTRY_RELOC +#undef ELEM_RELOC + + +#define PLT_TYPE_START(NAME) \ + const insn_hword NAME##_plt_elem[] = { +#define PLT_TYPE_END(NAME) }; +#define PLT_ENTRY(...) +#define PLT_ELEM(...) __VA_ARGS__, +#define ENTRY_RELOC(...) +#define ELEM_RELOC(...) + +#include "arc-plt.def" + +#undef PLT_TYPE_START +#undef PLT_TYPE_END +#undef PLT_ENTRY +#undef PLT_ELEM +#undef ENTRY_RELOC +#undef ELEM_RELOC + +#define PLT_TYPE_START(NAME) \ + const struct plt_reloc NAME##_plt_elem_relocs[] = { +#define PLT_TYPE_END(NAME) \ + {0, 0, 0, LAST_RELOC, 0} \ + }; +#define PLT_ENTRY(...) +#define PLT_ELEM(...) +#define ENTRY_RELOC(...) +#define ELEM_RELOC(...) { __VA_ARGS__ }, + +#include "arc-plt.def" + +#undef PLT_TYPE_START +#undef PLT_TYPE_END +#undef PLT_ENTRY +#undef PLT_ELEM +#undef ENTRY_RELOC +#undef ELEM_RELOC + + +#define PLT_TYPE_START(NAME) \ + { \ + .entry = &NAME##_plt_entry, \ + .entry_size = sizeof (NAME##_plt_entry), \ + .elem = &NAME##_plt_elem, \ + .elem_size = sizeof (NAME##_plt_elem), \ + .entry_relocs = NAME##_plt_entry_relocs, \ + .elem_relocs = NAME##_plt_elem_relocs +#define PLT_TYPE_END(NAME) }, +#define PLT_ENTRY(...) +#define PLT_ELEM(...) +#define ENTRY_RELOC(...) +#define ELEM_RELOC(...) +struct plt_version_t plt_versions[PLT_MAX] = { + +#include "arc-plt.def" + +}; +#undef PLT_TYPE_START +#undef PLT_TYPE_END +#undef PLT_ENTRY +#undef PLT_ELEM +#undef ENTRY_RELOC +#undef ELEM_RELOC + + +#endif /* ARC_PLT_H */ |