Some cleanups of N_TXTADDR and N_TXTOFF.
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@ -7,6 +7,7 @@
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#define SEG_SIZE_SUN3 0x20000 /* Resolution of r/w protection hw */
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#define TEXT_START_ADDR PAGE_SIZE /* Location 0 is not accessible */
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#define N_HEADER_IN_TEXT(x) 1
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/* Non-default definitions of the accessor macros... */
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@ -16,11 +17,6 @@
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N_MACHTYPE(x) == M_68020? SEG_SIZE_SUN3: \
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/* Guess? */ PAGE_SIZE)
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/* Offset in a.out file of the text section. For ZMAGIC, the text section
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actually includes the a.out header. */
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#define N_TXTOFF(x) ( (N_MAGIC((x)) == ZMAGIC) ? 0 : EXEC_BYTES_SIZE)
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/* Virtual Address of text segment from the a.out file. For OMAGIC,
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(almost always "unlinked .o's" these days), should be zero.
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Sun added a kludge so that shared libraries linked ZMAGIC get
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@ -31,4 +27,4 @@
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#define N_TXTADDR(x) \
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(N_MAGIC(x)==OMAGIC? 0 \
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: (N_MAGIC(x) == ZMAGIC && (x).a_entry < TEXT_START_ADDR)? 0 \
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: TEXT_START_ADDR)
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: TEXT_START_ADDR+EXEC_BYTES_SIZE)
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@ -26,22 +26,35 @@ struct external_exec
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#endif
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#define _N_HDROFF(x) (N_SEGSIZE(x) - EXEC_BYTES_SIZE)
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/* address in an a.out of the text section. When demand paged, it's
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set up a bit to make nothing at 0, when an object file it's 0.
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There's a special hack case when the entry point is < TEXT_START_ADDR
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for executables, then the real start is 0
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/* If the exec header is mapped in as part of a shared text segemnt.
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Only relevant for ZMAGIC files. */
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#ifndef N_HEADER_IN_TEXT
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#define N_HEADER_IN_TEXT(x) 1
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#endif
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/* Virtual memory address of the text section. When demand paged, it's
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set up a bit to make nothing at 0, when an object file it's 0.
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There's a special hack case when the entry point is < TEXT_START_ADDR
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for executables, then the real start is 0
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Note that this differs from Sun's definition: They consider
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the text segment to start at 0x2000; we view it as starting at 0x2000.
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I.e., we never consider the exec header to be part of the text segment.
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*/
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#ifndef N_TXTADDR
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#define N_TXTADDR(x) \
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(N_MAGIC(x)==OMAGIC? 0 \
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: (N_MAGIC(x) == ZMAGIC && (x).a_entry < TEXT_START_ADDR)? 0 \
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(N_MAGIC(x)!=ZMAGIC? 0 \
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: N_HEADER_IN_TEXT(x) ? TEXT_START_ADDR+EXEC_BYTES_SIZE \
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: TEXT_START_ADDR)
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#endif
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/* offset in an a.out of the start of the text section. When demand
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paged, this is the start of the file
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*/
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/* Offset in an a.out of the start of the text section. */
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#define N_TXTOFF(x) ( (N_MAGIC((x)) == ZMAGIC) ? 0 : EXEC_BYTES_SIZE)
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#define N_TXTOFF(x) ( N_MAGIC(x) != ZMAGIC ? EXEC_BYTES_SIZE \
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: N_HEADER_IN_TEXT(x) ? EXEC_BYTES_SIZE : PAGE_SIZE)
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#if ARCH_SIZE==64
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#define OMAGIC 0x1001 /* Code indicating object file */
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#define ZMAGIC 0x1002 /* Code indicating demand-paged executable. */
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