Hello,
DIS88 fails to disassembly 8086 executables when it is built with a
"64-linux-gnu" chain.
This is because a.out.h uses non-portable integers types, resulting in
incorrect structure size computation.
Here is a patch that fixes the sizes of the a.out.h structures, using
C99 fixed-size integers.
Yes, I assume you build DEV86 with a C99 compliant compiler...
MFLD
diff --git a/libc/include/a.out.h b/libc/include/a.out.h
index 677d73e..683e3ec 100644
--- a/libc/include/a.out.h
+++ b/libc/include/a.out.h
@@ -15,18 +15,18 @@
unsigned char a_hdrlen; /* length of header */
unsigned char a_unused; /* reserved for future use */
unsigned short a_version; /* version stamp (not used at present) */
- long a_text; /* size of text segement in bytes */
- long a_data; /* size of data segment in bytes */
- long a_bss; /* size of bss segment in bytes */
- long a_entry; /* entry point */
- long a_total; /* total memory allocated */
- long a_syms; /* size of symbol table */
+ u_int32_t a_text; /* size of text segement in bytes */
+ u_int32_t a_data; /* size of data segment in bytes */
+ u_int32_t a_bss; /* size of bss segment in bytes */
+ u_int32_t a_entry; /* entry point */
+ u_int32_t a_total; /* total memory allocated */
+ u_int32_t a_syms; /* size of symbol table */
/* SHORT FORM ENDS HERE */
- long a_trsize; /* text relocation size */
- long a_drsize; /* data relocation size */
- long a_tbase; /* text relocation base */
- long a_dbase; /* data relocation base */
+ u_int32_t a_trsize; /* text relocation size */
+ u_int32_t a_drsize; /* data relocation size */
+ u_int32_t a_tbase; /* text relocation base */
+ u_int32_t a_dbase; /* data relocation base */
};
#define A_MAGIC0 (unsigned char) 0x01
@@ -56,7 +56,7 @@
/* Offsets of various things. */
#define A_MINHDR 32
-#define A_TEXTPOS(X) ((long)(X).a_hdrlen)
+#define A_TEXTPOS(X) ((u_int32_t)(X).a_hdrlen)
#define A_DATAPOS(X) (A_TEXTPOS(X) + (X).a_text)
#define A_HASRELS(X) ((X).a_hdrlen > (unsigned char) A_MINHDR)
#define A_HASEXT(X) ((X).a_hdrlen > (unsigned char) (A_MINHDR + 8))
@@ -68,7 +68,7 @@
((X).a_trsize + (X).a_drsize) : 0))
struct reloc {
- long r_vaddr; /* virtual address of reference */
+ u_int32_t r_vaddr; /* virtual address of reference */
unsigned short r_symndx; /* internal segnum or extern symbol num */
unsigned short r_type; /* relocation type */
};
@@ -92,7 +92,7 @@
struct nlist { /* symbol table entry */
char n_name[8]; /* symbol name */
- long n_value; /* value */
+ u_int32_t n_value; /* value */
unsigned char n_sclass; /* storage class */
unsigned char n_numaux; /* number of auxiliary entries (not
used) */
unsigned short n_type; /* language base and derived type (not
used) */
--
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