4055a11236
* ti.h (GET_SCNHDR_NLNNO): Provide an alternative version of this
macro which does not trigger an array bounds warning in gcc.
(PUT_SCNHDR_NLNNO): Likewise.
(GET_SCNHDR_FLAGS): Likewise.
(PUT_SCNHDR_FLAGS): Likewise.
(GET_SCNHDR_PAGE): Likewise.
(PUT_SCNHDR_PAGE): Likewise.
545 lines
18 KiB
C
545 lines
18 KiB
C
/* COFF information for TI COFF support. Definitions in this file should be
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customized in a target-specific file, and then this file included (see
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tic54x.h for an example).
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Copyright 2000, 2001, 2002, 2003, 2008 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
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#ifndef COFF_TI_H
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#define COFF_TI_H
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/* Note "coff/external.h is not used because TI adds extra fields to the structures. */
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/********************** FILE HEADER **********************/
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struct external_filehdr
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{
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char f_magic[2]; /* magic number */
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char f_nscns[2]; /* number of sections */
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char f_timdat[4]; /* time & date stamp */
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char f_symptr[4]; /* file pointer to symtab */
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char f_nsyms[4]; /* number of symtab entries */
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char f_opthdr[2]; /* sizeof(optional hdr) */
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char f_flags[2]; /* flags */
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char f_target_id[2]; /* magic no. (TI COFF-specific) */
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};
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/* COFF0 has magic number in f_magic, and omits f_target_id from the file
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header; for later versions, f_magic is 0xC1 for COFF1 and 0xC2 for COFF2
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and the target-specific magic number is found in f_target_id */
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#define TICOFF0MAGIC TI_TARGET_ID
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#define TICOFF1MAGIC 0x00C1
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#define TICOFF2MAGIC 0x00C2
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#define TICOFF_AOUT_MAGIC 0x0108 /* magic number in optional header */
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#define TICOFF 1 /* customize coffcode.h */
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/* The target_id field changes depending on the particular CPU target */
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/* for COFF0, the target id appeared in f_magic, where COFFX magic is now */
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#ifndef TI_TARGET_ID
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#error "TI_TARGET_ID needs to be defined for your CPU"
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#endif
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/* Which bfd_arch to use... */
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#ifndef TICOFF_TARGET_ARCH
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#error "TICOFF_TARGET_ARCH needs to be defined for your CPU"
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#endif
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#ifndef TICOFF_TARGET_MACHINE_GET
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#define TICOFF_TARGET_MACHINE_GET(FLAGS) 0
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#endif
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#ifndef TICOFF_TARGET_MACHINE_SET
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#define TICOFF_TARGET_MACHINE_SET(FLAGSP, MACHINE)
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#endif
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/* Default to COFF2 for file output */
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#ifndef TICOFF_DEFAULT_MAGIC
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#define TICOFF_DEFAULT_MAGIC TICOFF2MAGIC
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#endif
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/* This value is made available in the rare case where a bfd is unavailable */
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#ifndef OCTETS_PER_BYTE_POWER
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#error "OCTETS_PER_BYTE_POWER not defined for this CPU"
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#else
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#define OCTETS_PER_BYTE (1<<OCTETS_PER_BYTE_POWER)
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#endif
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/* default alignment is on a byte (not octet!) boundary */
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#ifndef COFF_DEFAULT_SECTION_ALIGNMENT_POWER
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#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER 0
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#endif
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/* TI COFF encodes the section alignment in the section header flags */
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#define COFF_ALIGN_IN_SECTION_HEADER 1
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#define COFF_ALIGN_IN_S_FLAGS 1
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/* requires a power-of-two argument */
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#define COFF_ENCODE_ALIGNMENT(S,X) ((S).s_flags |= (((unsigned)(X)&0xF)<<8))
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/* result is a power of two */
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#define COFF_DECODE_ALIGNMENT(X) (((X)>>8)&0xF)
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#define COFF0_P(ABFD) (bfd_coff_filhsz(ABFD) == FILHSZ_V0)
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#define COFF2_P(ABFD) (bfd_coff_scnhsz(ABFD) != SCNHSZ_V01)
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#define COFF0_BADMAG(x) ((x).f_magic != TICOFF0MAGIC)
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#define COFF1_BADMAG(x) ((x).f_magic != TICOFF1MAGIC || (x).f_target_id != TI_TARGET_ID)
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#define COFF2_BADMAG(x) ((x).f_magic != TICOFF2MAGIC || (x).f_target_id != TI_TARGET_ID)
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/* we need to read/write an extra field in the coff file header */
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#ifndef COFF_ADJUST_FILEHDR_IN_POST
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#define COFF_ADJUST_FILEHDR_IN_POST(abfd, src, dst) \
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do \
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{ \
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((struct internal_filehdr *)(dst))->f_target_id = \
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H_GET_16 (abfd, ((FILHDR *)(src))->f_target_id); \
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} \
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while (0)
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#endif
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#ifndef COFF_ADJUST_FILEHDR_OUT_POST
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#define COFF_ADJUST_FILEHDR_OUT_POST(abfd, src, dst) \
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do \
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{ \
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H_PUT_16 (abfd, ((struct internal_filehdr *)(src))->f_target_id, \
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((FILHDR *)(dst))->f_target_id); \
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} \
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while (0)
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#endif
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#define FILHDR struct external_filehdr
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#define FILHSZ 22
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#define FILHSZ_V0 20 /* COFF0 omits target_id field */
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/* File header flags */
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#define F_RELFLG (0x0001)
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#define F_EXEC (0x0002)
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#define F_LNNO (0x0004)
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#define F_VERS (0x0010) /* TMS320C4x code */
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/* F_LSYMS needs to be redefined in your source file */
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#define F_LSYMS_TICOFF (0x0010) /* normal COFF is 0x8 */
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#define F_10 0x00 /* file built for TMS320C1x devices */
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#define F_20 0x10 /* file built for TMS320C2x devices */
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#define F_25 0x20 /* file built for TMS320C2x/C5x devices */
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#define F_LENDIAN 0x0100 /* 16 bits/word, LSB first */
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#define F_SYMMERGE 0x1000 /* duplicate symbols were removed */
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/********************** OPTIONAL HEADER **********************/
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typedef struct
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{
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char magic[2]; /* type of file (0x108) */
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char vstamp[2]; /* version stamp */
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char tsize[4]; /* text size in bytes, padded to FW bdry*/
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char dsize[4]; /* initialized data " " */
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char bsize[4]; /* uninitialized data " " */
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char entry[4]; /* entry pt. */
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char text_start[4]; /* base of text used for this file */
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char data_start[4]; /* base of data used for this file */
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}
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AOUTHDR;
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#define AOUTHDRSZ 28
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#define AOUTSZ 28
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/********************** SECTION HEADER **********************/
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/* COFF0, COFF1 */
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struct external_scnhdr_v01 {
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char s_name[8]; /* section name */
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char s_paddr[4]; /* physical address, aliased s_nlib */
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char s_vaddr[4]; /* virtual address */
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char s_size[4]; /* section size (in WORDS) */
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char s_scnptr[4]; /* file ptr to raw data for section */
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char s_relptr[4]; /* file ptr to relocation */
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char s_lnnoptr[4]; /* file ptr to line numbers */
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char s_nreloc[2]; /* number of relocation entries */
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char s_nlnno[2]; /* number of line number entries*/
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char s_flags[2]; /* flags */
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char s_reserved[1]; /* reserved */
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char s_page[1]; /* section page number (LOAD) */
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};
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/* COFF2 */
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struct external_scnhdr {
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char s_name[8]; /* section name */
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char s_paddr[4]; /* physical address, aliased s_nlib */
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char s_vaddr[4]; /* virtual address */
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char s_size[4]; /* section size (in WORDS) */
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char s_scnptr[4]; /* file ptr to raw data for section */
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char s_relptr[4]; /* file ptr to relocation */
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char s_lnnoptr[4]; /* file ptr to line numbers */
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char s_nreloc[4]; /* number of relocation entries */
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char s_nlnno[4]; /* number of line number entries*/
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char s_flags[4]; /* flags */
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char s_reserved[2]; /* reserved */
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char s_page[2]; /* section page number (LOAD) */
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};
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/*
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* Special section flags
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*/
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/* TI COFF defines these flags;
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STYP_CLINK: the section should be excluded from the final
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linker output if there are no references found to any symbol in the section
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STYP_BLOCK: the section should be blocked, i.e. if the section would cross
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a page boundary, it is started at a page boundary instead.
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TI COFF puts the section alignment power of two in the section flags
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e.g. 2**N is alignment, flags |= (N & 0xF) << 8
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*/
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#define STYP_CLINK (0x4000)
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#define STYP_BLOCK (0x1000)
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#define STYP_ALIGN (0x0F00) /* TI COFF stores section alignment here */
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#define SCNHDR_V01 struct external_scnhdr_v01
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#define SCNHDR struct external_scnhdr
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#define SCNHSZ_V01 40 /* for v0 and v1 */
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#define SCNHSZ 48
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/* COFF2 changes the offsets and sizes of these fields
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Assume we're dealing with the COFF2 scnhdr structure, and adjust
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accordingly. Note: The GNU C versions of some of these macros
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are necessary in order to avoid compile time warnings triggered
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gcc's array bounds checking. The PUT_SCNHDR_PAGE macro also has
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the advantage on not evaluating LOC twice. */
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#define GET_SCNHDR_NRELOC(ABFD, LOC) \
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(COFF2_P (ABFD) ? H_GET_32 (ABFD, LOC) : H_GET_16 (ABFD, LOC))
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#define PUT_SCNHDR_NRELOC(ABFD, VAL, LOC) \
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(COFF2_P (ABFD) ? H_PUT_32 (ABFD, VAL, LOC) : H_PUT_16 (ABFD, VAL, LOC))
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#ifdef __GNUC__
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#define GET_SCNHDR_NLNNO(ABFD, LOC) \
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({ \
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int nlnno; \
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char * ptr = (LOC); \
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if (COFF2_P (ABFD)) \
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nlnno = H_GET_32 (ABFD, ptr); \
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else \
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nlnno = H_GET_16 (ABFD, ptr - 2); \
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nlnno; \
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})
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#define PUT_SCNHDR_NLNNO(ABFD, VAL, LOC) \
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do \
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{ \
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char * ptr = (LOC); \
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if (COFF2_P (ABFD)) \
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H_PUT_32 (ABFD, VAL, ptr); \
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else \
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H_PUT_16 (ABFD, VAL, ptr - 2); \
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} \
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while (0)
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#define GET_SCNHDR_FLAGS(ABFD, LOC) \
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({ \
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int flags; \
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char * ptr = (LOC); \
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if (COFF2_P (ABFD)) \
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flags = H_GET_32 (ABFD, ptr); \
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else \
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flags = H_GET_16 (ABFD, ptr - 4); \
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flags; \
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})
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#define PUT_SCNHDR_FLAGS(ABFD, VAL, LOC) \
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do \
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{ \
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char * ptr = (LOC); \
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if (COFF2_P (ABFD)) \
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H_PUT_32 (ABFD, VAL, ptr); \
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else \
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H_PUT_16 (ABFD, VAL, ptr - 4); \
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} \
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while (0)
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#define GET_SCNHDR_PAGE(ABFD, LOC) \
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({ \
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unsigned page; \
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char * ptr = (LOC); \
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if (COFF2_P (ABFD)) \
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page = H_GET_16 (ABFD, ptr); \
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else \
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page = (unsigned) H_GET_8 (ABFD, ptr - 7); \
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page; \
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})
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/* On output, make sure that the "reserved" field is zero. */
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#define PUT_SCNHDR_PAGE(ABFD, VAL, LOC) \
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do \
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{ \
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char * ptr = (LOC); \
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if (COFF2_P (ABFD)) \
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H_PUT_16 (ABFD, VAL, ptr); \
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else \
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{ \
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H_PUT_8 (ABFD, VAL, ptr - 7); \
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H_PUT_8 (ABFD, 0, ptr - 8); \
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} \
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} \
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while (0)
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#else
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#define GET_SCNHDR_NLNNO(ABFD, LOC) \
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(COFF2_P (ABFD) ? H_GET_32 (ABFD, LOC) : H_GET_16 (ABFD, (LOC) - 2))
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#define PUT_SCNHDR_NLNNO(ABFD, VAL, LOC) \
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(COFF2_P (ABFD) ? H_PUT_32 (ABFD, VAL, LOC) : H_PUT_16 (ABFD, VAL, (LOC) - 2))
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#define GET_SCNHDR_FLAGS(ABFD, LOC) \
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(COFF2_P (ABFD) ? H_GET_32 (ABFD, LOC) : H_GET_16 (ABFD, (LOC) - 4))
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#define PUT_SCNHDR_FLAGS(ABFD, VAL, LOC) \
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(COFF2_P (ABFD) ? H_PUT_32 (ABFD, VAL, LOC) : H_PUT_16 (ABFD, VAL, (LOC) - 4))
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#define GET_SCNHDR_PAGE(ABFD, LOC) \
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(COFF2_P (ABFD) ? H_GET_16 (ABFD, LOC) : (unsigned) H_GET_8 (ABFD, (LOC) - 7))
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/* On output, make sure that the "reserved" field is zero. */
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#define PUT_SCNHDR_PAGE(ABFD, VAL, LOC) \
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(COFF2_P (ABFD) \
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? H_PUT_16 (ABFD, VAL, LOC) \
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: H_PUT_8 (ABFD, VAL, (LOC) - 7), H_PUT_8 (ABFD, 0, (LOC) - 8))
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#endif
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/* TI COFF stores section size as number of bytes (address units, not octets),
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so adjust to be number of octets, which is what BFD expects */
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#define GET_SCNHDR_SIZE(ABFD, SZP) \
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(H_GET_32 (ABFD, SZP) * bfd_octets_per_byte (ABFD))
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#define PUT_SCNHDR_SIZE(ABFD, SZ, SZP) \
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H_PUT_32 (ABFD, (SZ) / bfd_octets_per_byte (ABFD), SZP)
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#define COFF_ADJUST_SCNHDR_IN_POST(ABFD, EXT, INT) \
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do \
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{ \
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((struct internal_scnhdr *)(INT))->s_page = \
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GET_SCNHDR_PAGE (ABFD, ((SCNHDR *)(EXT))->s_page); \
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} \
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while (0)
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/* The line number and reloc overflow checking in coff_swap_scnhdr_out in
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coffswap.h doesn't use PUT_X for s_nlnno and s_nreloc.
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Due to different sized v0/v1/v2 section headers, we have to re-write these
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fields.
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*/
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#define COFF_ADJUST_SCNHDR_OUT_POST(ABFD, INT, EXT) \
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do \
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{ \
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PUT_SCNHDR_NLNNO (ABFD, ((struct internal_scnhdr *)(INT))->s_nlnno, \
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((SCNHDR *)(EXT))->s_nlnno); \
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PUT_SCNHDR_NRELOC (ABFD, ((struct internal_scnhdr *)(INT))->s_nreloc,\
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((SCNHDR *)(EXT))->s_nreloc); \
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PUT_SCNHDR_FLAGS (ABFD, ((struct internal_scnhdr *)(INT))->s_flags, \
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((SCNHDR *)(EXT))->s_flags); \
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PUT_SCNHDR_PAGE (ABFD, ((struct internal_scnhdr *)(INT))->s_page, \
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((SCNHDR *)(EXT))->s_page); \
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} \
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while (0)
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/*
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* names of "special" sections
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*/
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#define _TEXT ".text"
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#define _DATA ".data"
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#define _BSS ".bss"
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#define _CINIT ".cinit" /* initialized C data */
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#define _SCONST ".const" /* constants */
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#define _SWITCH ".switch" /* switch tables */
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#define _STACK ".stack" /* C stack */
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#define _SYSMEM ".sysmem" /* used for malloc et al. syscalls */
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/********************** LINE NUMBERS **********************/
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/* 1 line number entry for every "breakpointable" source line in a section.
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* Line numbers are grouped on a per function basis; first entry in a function
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* grouping will have l_lnno = 0 and in place of physical address will be the
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* symbol table index of the function name.
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*/
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struct external_lineno {
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union {
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char l_symndx[4]; /* function name symbol index, iff l_lnno == 0*/
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char l_paddr[4]; /* (physical) address of line number */
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} l_addr;
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char l_lnno[2]; /* line number */
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};
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#define LINENO struct external_lineno
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#define LINESZ 6
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/********************** SYMBOLS **********************/
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/* NOTE: this is what a local label looks like in assembly source; what it
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looks like in COFF output is undefined */
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#define TICOFF_LOCAL_LABEL_P(NAME) \
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((NAME[0] == '$' && NAME[1] >= '0' && NAME[1] <= '9' && NAME[2] == '\0') \
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|| NAME[strlen(NAME)-1] == '?')
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#define E_SYMNMLEN 8 /* # characters in a symbol name */
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#define E_FILNMLEN 14 /* # characters in a file name */
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#define E_DIMNUM 4 /* # array dimensions in auxiliary entry */
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struct external_syment
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{
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union {
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char e_name[E_SYMNMLEN];
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struct {
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char e_zeroes[4];
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char e_offset[4];
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} e;
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} e;
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char e_value[4];
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char e_scnum[2];
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char e_type[2];
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char e_sclass[1];
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char e_numaux[1];
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};
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#define N_BTMASK (017)
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#define N_TMASK (060)
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#define N_BTSHFT (4)
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#define N_TSHIFT (2)
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union external_auxent {
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struct {
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char x_tagndx[4]; /* str, un, or enum tag indx */
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union {
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struct {
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char x_lnno[2]; /* declaration line number */
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char x_size[2]; /* str/union/array size */
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} x_lnsz;
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char x_fsize[4]; /* size of function */
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} x_misc;
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union {
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struct { /* if ISFCN, tag, or .bb */
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char x_lnnoptr[4]; /* ptr to fcn line # */
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char x_endndx[4]; /* entry ndx past block end */
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} x_fcn;
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struct { /* if ISARY, up to 4 dimen. */
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char x_dimen[E_DIMNUM][2];
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} x_ary;
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} x_fcnary;
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char x_tvndx[2]; /* tv index */
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} x_sym;
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union {
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char x_fname[E_FILNMLEN];
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struct {
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char x_zeroes[4];
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char x_offset[4];
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} x_n;
|
|
} x_file;
|
|
|
|
struct {
|
|
char x_scnlen[4]; /* section length */
|
|
char x_nreloc[2]; /* # relocation entries */
|
|
char x_nlinno[2]; /* # line numbers */
|
|
} x_scn;
|
|
|
|
struct {
|
|
char x_tvfill[4]; /* tv fill value */
|
|
char x_tvlen[2]; /* length of .tv */
|
|
char x_tvran[2][2]; /* tv range */
|
|
} x_tv; /* info about .tv section (in auxent of symbol .tv)) */
|
|
|
|
|
|
};
|
|
|
|
#define SYMENT struct external_syment
|
|
#define SYMESZ 18
|
|
#define AUXENT union external_auxent
|
|
#define AUXESZ 18
|
|
|
|
/* section lengths are in target bytes (not host bytes) */
|
|
#define GET_SCN_SCNLEN(ABFD, EXT) \
|
|
(H_GET_32 (ABFD, (EXT)->x_scn.x_scnlen) * bfd_octets_per_byte (ABFD))
|
|
#define PUT_SCN_SCNLEN(ABFD, INT, EXT) \
|
|
H_PUT_32 (ABFD, (INT) / bfd_octets_per_byte (ABFD), (EXT)->x_scn.x_scnlen)
|
|
|
|
/* lnsz size is in bits in COFF file, in bytes in BFD */
|
|
#define GET_LNSZ_SIZE(abfd, ext) \
|
|
(H_GET_16 (abfd, ext->x_sym.x_misc.x_lnsz.x_size) / (class != C_FIELD ? 8 : 1))
|
|
|
|
#define PUT_LNSZ_SIZE(abfd, in, ext) \
|
|
H_PUT_16 (abfd, ((class != C_FIELD) ? (in) * 8 : (in)), \
|
|
ext->x_sym.x_misc.x_lnsz.x_size)
|
|
|
|
/* TI COFF stores offsets for MOS and MOU in bits; BFD expects bytes
|
|
Also put the load page flag of the section into the symbol value if it's an
|
|
address. */
|
|
#ifndef NEEDS_PAGE
|
|
#define NEEDS_PAGE(X) 0
|
|
#define PAGE_MASK 0
|
|
#endif
|
|
#define COFF_ADJUST_SYM_IN_POST(ABFD, EXT, INT) \
|
|
do \
|
|
{ \
|
|
struct internal_syment *dst = (struct internal_syment *)(INT); \
|
|
if (dst->n_sclass == C_MOS || dst->n_sclass == C_MOU) \
|
|
dst->n_value /= 8; \
|
|
else if (NEEDS_PAGE (dst->n_sclass)) { \
|
|
asection *scn = coff_section_from_bfd_index (abfd, dst->n_scnum); \
|
|
dst->n_value |= (scn->lma & PAGE_MASK); \
|
|
} \
|
|
} \
|
|
while (0)
|
|
|
|
#define COFF_ADJUST_SYM_OUT_POST(ABFD, INT, EXT) \
|
|
do \
|
|
{ \
|
|
struct internal_syment *src = (struct internal_syment *)(INT); \
|
|
SYMENT *dst = (SYMENT *)(EXT); \
|
|
if (src->n_sclass == C_MOU || src->n_sclass == C_MOS) \
|
|
H_PUT_32 (abfd, src->n_value * 8, dst->e_value); \
|
|
else if (NEEDS_PAGE (src->n_sclass)) { \
|
|
H_PUT_32 (abfd, src->n_value &= ~PAGE_MASK, dst->e_value); \
|
|
} \
|
|
} \
|
|
while (0)
|
|
|
|
/* Detect section-relative absolute symbols so they get flagged with a sym
|
|
index of -1.
|
|
*/
|
|
#define SECTION_RELATIVE_ABSOLUTE_SYMBOL_P(RELOC, SECT) \
|
|
((*(RELOC)->sym_ptr_ptr)->section->output_section == (SECT) \
|
|
&& (RELOC)->howto->name[0] == 'A')
|
|
|
|
/********************** RELOCATION DIRECTIVES **********************/
|
|
|
|
struct external_reloc_v0
|
|
{
|
|
char r_vaddr[4];
|
|
char r_symndx[2];
|
|
char r_reserved[2];
|
|
char r_type[2];
|
|
};
|
|
|
|
struct external_reloc
|
|
{
|
|
char r_vaddr[4];
|
|
char r_symndx[4];
|
|
char r_reserved[2]; /* extended pmad byte for COFF2 */
|
|
char r_type[2];
|
|
};
|
|
|
|
#define RELOC struct external_reloc
|
|
#define RELSZ_V0 10 /* FIXME -- coffcode.h needs fixing */
|
|
#define RELSZ 12 /* for COFF1/2 */
|
|
|
|
/* various relocation types. */
|
|
#define R_ABS 0x0000 /* no relocation */
|
|
#define R_REL13 0x002A /* 13-bit direct reference (???) */
|
|
#define R_PARTLS7 0x0028 /* 7 LSBs of an address */
|
|
#define R_PARTMS9 0x0029 /* 9MSBs of an address */
|
|
#define R_EXTWORD 0x002B /* 23-bit direct reference */
|
|
#define R_EXTWORD16 0x002C /* 16-bit direct reference to 23-bit addr*/
|
|
#define R_EXTWORDMS7 0x002D /* upper 7 bits of 23-bit address */
|
|
|
|
#endif /* COFF_TI_H */
|