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Roll in some changes. Unlikely to compile yet.
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John Gilmore
parent
2c3f93e56d
commit
1b78540a99
@ -1,4 +1,4 @@
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/* Another try at encapsulating bsd object files in coff.
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/* Yet Another Try at encapsulating bsd object files in coff.
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Copyright (C) 1988, 1989, 1991 Free Software Foundation, Inc.
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Written by Pace Willisson 12/9/88
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@ -20,7 +20,7 @@ along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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/*
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* This time, we will only use the coff headers to tell the kernel
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* We only use the coff headers to tell the kernel
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* how to exec the file. Therefore, the only fields that need to
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* be filled in are the scnptr and vaddr for the text and data
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* sections, and the vaddr for the bss. As far as coff is concerned,
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@ -33,13 +33,8 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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* like N_TXTOFF and N_TXTADDR use this field to find the bsd header.
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*
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* The only problem is to track down the bsd exec header. The
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* macros HEADER_OFFSET, etc do this. Look at nm.c, dis.c, etc
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* for examples.
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* macros HEADER_OFFSET, etc do this.
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*/
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#ifndef A_OUT_ENCAP_H_SEEN
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#define A_OUT_ENCAP_H_SEEN
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#include "a.out.gnu.h"
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#define N_FLAGS_COFF_ENCAPSULATE 0x20 /* coff header precedes bsd header */
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@ -76,67 +71,38 @@ struct coffheader
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unsigned short s_nreloc;
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unsigned short s_nlnno;
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long s_flags;
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} scns[3]; /* text, data, bss */
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} scns[3];
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};
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/* Describe some of the parameters of the encapsulation,
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including how to find the encapsulated BSD header. */
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#if TARGET == TARGET_I386
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#define COFF_MAGIC 0514 /* I386MAGIC */
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#endif
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#if TARGET == TARGET_M68K
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#define COFF_MAGIC 0520 /* MC68MAGIC */
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#endif
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#if TARGET == TARGET_SPARC
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#define COFF_MAGIC UNKNOWN!!! /* Used by TTI */
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#endif
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#if TARGET == TARGET_AM29K
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#define COFF_MAGIC 0x17A /* Used by asm29k cross-tools */
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#endif
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/* FIXME, this is dumb. The same tools can't handle a.outs for different
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architectures, just because COFF_MAGIC is different; so you need a
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separate GNU nm for every architecture!!? Unfortunately, it needs to
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be this way, since the COFF_MAGIC value is determined by the kernel
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we're trying to fool here. */
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#define COFF_MAGIC_I386 0514 /* I386MAGIC */
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#define COFF_MAGIC_M68K 0520 /* MC68MAGIC */
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#define COFF_MAGIC_A29K 0x17A /* Used by asm29k cross-tools */
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#ifdef COFF_MAGIC
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short __header_offset_temp;
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/* FIXME, this is dumb. The same tools can't handle a.outs for different
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architectures, just because COFF_MAGIC is different; so you need a
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separate GNU nm for every architecture!!? Also note that for
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expediency, this macros accepts COFF_MAGIC in either byte order.
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The right thing to do is to call read_aout_header to handle all this. */
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#define HEADER_OFFSET(f) \
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(__header_offset_temp = 0, \
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fread ((char *)&__header_offset_temp, sizeof (short), 1, (f)), \
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fseek ((f), -sizeof (short), 1), \
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(__header_offset_temp==COFF_MAGIC || __header_offset_temp == \
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((COFF_MAGIC >> 8)|((COFF_MAGIC&0xFF)<<8)) \
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? sizeof(struct coffheader) : 0))
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#define HEADER_OFFSET_FD(fd) \
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(__header_offset_temp = 0, \
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read (fd, (char *)&__header_offset_temp, sizeof (short)), \
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lseek ((fd), -sizeof (short), 1), \
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(__header_offset_temp==COFF_MAGIC || __header_offset_temp == \
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((COFF_MAGIC >> 8)|((COFF_MAGIC&0xFF)<<8)) \
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? sizeof(struct coffheader) : 0))
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__header_offset_temp==COFF_MAGIC ? sizeof(struct coffheader) : 0)
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#else
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#define HEADER_OFFSET(f) 0
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#define HEADER_OFFSET_FD(fd) 0
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#endif
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#define HEADER_SEEK(f) (fseek ((f), HEADER_OFFSET((f)), 1))
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#define HEADER_SEEK_FD(fd) (lseek ((fd), HEADER_OFFSET_FD((fd)), 1))
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/* Describe the characteristics of the BSD header
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that appears inside the encapsulation. */
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#undef _N_HDROFF
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#undef N_TXTADDR
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#undef N_DATADDR
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/* Encapsulated coff files that are linked ZMAGIC have a text segment
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offset just past the header (and a matching TXTADDR), excluding
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the headers from the text segment proper but keeping the physical
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@ -150,23 +116,20 @@ short __header_offset_temp;
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The _N_HDROFF gets sizeof struct exec added to it, so we have
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to compensate here. See <a.out.gnu.h>. */
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#undef _N_HDROFF
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#undef N_TXTADDR
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#undef N_DATADDR
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#define _N_HDROFF(x) ((N_FLAGS(x) & N_FLAGS_COFF_ENCAPSULATE) ? \
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sizeof (struct coffheader) : -sizeof (struct exec))
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sizeof (struct coffheader) : 0)
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/* Address of text segment in memory after it is loaded. */
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#define N_TXTADDR(x) \
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(TEXT_START_ADDR + \
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((N_FLAGS(x) & N_FLAGS_COFF_ENCAPSULATE) ? \
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sizeof (struct coffheader) + sizeof (struct exec) : 0))
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/* I have no idea what this is doing here. -- gnu@toad.com 20Mar90
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Perhaps it is to give a size that is acceptable to any machine? */
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#undef SEGMENT_SIZE
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sizeof (struct coffheader) + sizeof (struct exec) : 0)
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#define SEGMENT_SIZE 0x400000
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#define N_DATADDR(x) \
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((N_FLAGS(x) & N_FLAGS_COFF_ENCAPSULATE) ? \
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(SEGMENT_SIZE + ((N_TXTADDR(x)+(x).a_text-1) & ~(SEGMENT_SIZE-1))) : \
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(N_TXTADDR(x)+(x).a_text))
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#endif /* A_OUT_ENCAP_H_SEEN */
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