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diff --git a/gdb/tm-convex.h b/gdb/tm-convex.h
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+/* Definitions to make GDB run on Convex Unix (4bsd)
+ Copyright (C) 1989 Free Software Foundation, Inc.
+
+This file is part of GDB.
+
+GDB 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 1, or (at your option)
+any later version.
+
+GDB 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 GDB; see the file COPYING. If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#define TARGET_BYTE_ORDER BIG_ENDIAN
+
+/* I don't know if this will work for cross-debugging, even if you do get
+ the right files. */
+/* Include certain files for dbxread.c */
+#include <convex/filehdr.h>
+#include <convex/opthdr.h>
+#include <convex/scnhdr.h>
+#include <nlist.h>
+
+/* Define this if the C compiler puts an underscore at the front
+ of external names before giving them to the linker. */
+
+#define NAMES_HAVE_UNDERSCORE
+
+/* Debugger information will be in DBX format. */
+
+#define READ_DBX_FORMAT
+
+/* There is come problem with the debugging symbols generated by the
+ compiler such that the debugging symbol for the first line of a
+ function overlap with the function prologue. */
+#define PROLOGUE_FIRSTLINE_OVERLAP
+
+/* When convex pcc says CHAR or SHORT, it provides the correct address. */
+
+#define BELIEVE_PCC_PROMOTION 1
+
+/* Symbol types to ignore. */
+/* 0xc4 is N_MONPT. Use the numeric value for the benefit of people
+ with (rather) old OS's. */
+#define IGNORE_SYMBOL(TYPE) \
+ (((TYPE) & ~N_EXT) == N_TBSS \
+ || ((TYPE) & ~N_EXT) == N_TDATA \
+ || ((TYPE) & ~N_EXT) == 0xc4)
+
+/* Offset from address of function to start of its code.
+ Zero on most machines. */
+
+#define FUNCTION_START_OFFSET 0
+
+/* Advance PC across any function entry prologue instructions
+ to reach some "real" code.
+ Convex prolog is:
+ [sub.w #-,sp] in one of 3 possible sizes
+ [mov psw,- fc/vc main program prolog
+ and #-,- (skip it because the "mov psw" saves the
+ mov -,psw] T bit, so continue gets a surprise trap)
+ [and #-,sp] fc/vc O2 main program prolog
+ [ld.- -(ap),-] pcc/gcc register arg loads
+*/
+
+#define SKIP_PROLOGUE(pc) \
+{ int op, ix; \
+ op = read_memory_integer (pc, 2); \
+ if ((op & 0xffc7) == 0x5ac0) pc += 2; \
+ else if (op == 0x1580) pc += 4; \
+ else if (op == 0x15c0) pc += 6; \
+ if ((read_memory_integer (pc, 2) & 0xfff8) == 0x7c40 \
+ && (read_memory_integer (pc + 2, 2) & 0xfff8) == 0x1240 \
+ && (read_memory_integer (pc + 8, 2) & 0xfff8) == 0x7c48) \
+ pc += 10; \
+ if (read_memory_integer (pc, 2) == 0x1240) pc += 6; \
+ for (;;) { \
+ op = read_memory_integer (pc, 2); \
+ ix = (op >> 3) & 7; \
+ if (ix != 6) break; \
+ if ((op & 0xfcc0) == 0x3000) pc += 4; \
+ else if ((op & 0xfcc0) == 0x3040) pc += 6; \
+ else if ((op & 0xfcc0) == 0x2800) pc += 4; \
+ else if ((op & 0xfcc0) == 0x2840) pc += 6; \
+ else break;}}
+
+/* Immediately after a function call, return the saved pc.
+ (ignore frame and return *$sp so we can handle both calls and callq) */
+
+#define SAVED_PC_AFTER_CALL(frame) \
+ read_memory_integer (read_register (SP_REGNUM), 4)
+
+/* Address of end of stack space.
+ This is ((USRSTACK + 0xfff) & -0x1000)) from <convex/vmparam.h> but
+ that expression depends on the kernel version; instead, fetch a
+ page-zero pointer and get it from that. This will be invalid if
+ they ever change the way bkpt signals are delivered. */
+
+#define STACK_END_ADDR (0xfffff000 & *(unsigned *) 0x80000050)
+
+/* User-mode traps push an extended rtn block,
+ then fault with one of the following PCs */
+
+#define is_trace_pc(pc) ((unsigned) ((pc) - (*(int *) 0x80000040)) <= 4)
+#define is_arith_pc(pc) ((unsigned) ((pc) - (*(int *) 0x80000044)) <= 4)
+#define is_break_pc(pc) ((unsigned) ((pc) - (*(int *) 0x80000050)) <= 4)
+
+/* We need to manipulate trap bits in the psw */
+
+#define PSW_TRAP_FLAGS 0x69670000
+#define PSW_T_BIT 0x08000000
+#define PSW_S_BIT 0x01000000
+
+/* Stack grows downward. */
+
+#define INNER_THAN <
+
+/* Sequence of bytes for breakpoint instruction. (bkpt) */
+
+#define BREAKPOINT {0x7d,0x50}
+
+/* Amount PC must be decremented by after a breakpoint.
+ This is often the number of bytes in BREAKPOINT but not always.
+ (The break PC needs to be decremented by 2, but we do it when the
+ break frame is recognized and popped. That way gdb can tell breaks
+ from trace traps with certainty.) */
+
+#define DECR_PC_AFTER_BREAK 0
+
+/* Nonzero if instruction at PC is a return instruction. (rtn or rtnq) */
+
+#define ABOUT_TO_RETURN(pc) \
+ ((read_memory_integer (pc, 2) & 0xffe0) == 0x7c80)
+
+/* Return 1 if P points to an invalid floating point value. */
+
+#define INVALID_FLOAT(p,len) 0
+
+/* Say how long (ordinary) registers are. */
+
+#define REGISTER_TYPE long long
+
+/* Number of machine registers */
+
+#define NUM_REGS 26
+
+/* Initializer for an array of names of registers.
+ There should be NUM_REGS strings in this initializer. */
+
+#define REGISTER_NAMES {"pc","psw","fp","ap","a5","a4","a3","a2","a1","sp",\
+ "s7","s6","s5","s4","s3","s2","s1","s0",\
+ "S7","S6","S5","S4","S3","S2","S1","S0"}
+
+/* Register numbers of various important registers.
+ Note that some of these values are "real" register numbers,
+ and correspond to the general registers of the machine,
+ and some are "phony" register numbers which are too large
+ to be actual register numbers as far as the user is concerned
+ but do serve to get the desired values when passed to read_register. */
+
+#define S0_REGNUM 25 /* the real S regs */
+#define S7_REGNUM 18
+#define s0_REGNUM 17 /* low-order halves of S regs */
+#define s7_REGNUM 10
+#define SP_REGNUM 9 /* A regs */
+#define A1_REGNUM 8
+#define A5_REGNUM 4
+#define AP_REGNUM 3
+#define FP_REGNUM 2 /* Contains address of executing stack frame */
+#define PS_REGNUM 1 /* Contains processor status */
+#define PC_REGNUM 0 /* Contains program counter */
+
+/* convert dbx stab register number (from `r' declaration) to a gdb REGNUM */
+
+#define STAB_REG_TO_REGNUM(value) \
+ ((value) < 8 ? S0_REGNUM - (value) : SP_REGNUM - ((value) - 8))
+
+/* Vector register numbers, not handled as ordinary regs.
+ They are treated as convenience variables whose values are read
+ from the inferior when needed. */
+
+#define V0_REGNUM 0
+#define V7_REGNUM 7
+#define VM_REGNUM 8
+#define VS_REGNUM 9
+#define VL_REGNUM 10
+
+/* Total amount of space needed to store our copies of the machine's
+ register state, the array `registers'. */
+#define REGISTER_BYTES (4*10 + 8*8)
+
+/* Index within `registers' of the first byte of the space for
+ register N.
+ NB: must match structure of struct syscall_context for correct operation */
+
+#define REGISTER_BYTE(N) ((N) < s7_REGNUM ? 4*(N) : \
+ (N) < S7_REGNUM ? 44 + 8 * ((N)-s7_REGNUM) : \
+ 40 + 8 * ((N)-S7_REGNUM))
+
+/* Number of bytes of storage in the actual machine representation
+ for register N. */
+
+#define REGISTER_RAW_SIZE(N) ((N) < S7_REGNUM ? 4 : 8)
+
+/* Number of bytes of storage in the program's representation
+ for register N. */
+
+#define REGISTER_VIRTUAL_SIZE(N) REGISTER_RAW_SIZE(N)
+
+/* Largest value REGISTER_RAW_SIZE can have. */
+
+#define MAX_REGISTER_RAW_SIZE 8
+
+/* Largest value REGISTER_VIRTUAL_SIZE can have. */
+
+#define MAX_REGISTER_VIRTUAL_SIZE 8
+
+/* Nonzero if register N requires conversion
+ from raw format to virtual format. */
+
+#define REGISTER_CONVERTIBLE(N) 0
+
+/* Convert data from raw format for register REGNUM
+ to virtual format for register REGNUM. */
+
+#define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,FROM,TO) \
+ bcopy ((FROM), (TO), REGISTER_RAW_SIZE (REGNUM));
+
+/* Convert data from virtual format for register REGNUM
+ to raw format for register REGNUM. */
+
+#define REGISTER_CONVERT_TO_RAW(REGNUM,FROM,TO) \
+ bcopy ((FROM), (TO), REGISTER_RAW_SIZE (REGNUM));
+
+/* Return the GDB type object for the "standard" data type
+ of data in register N. */
+
+#define REGISTER_VIRTUAL_TYPE(N) \
+ ((N) < S7_REGNUM ? builtin_type_int : builtin_type_long_long)
+
+/* Store the address of the place in which to copy the structure the
+ subroutine will return. This is called from call_function. */
+
+#define STORE_STRUCT_RETURN(ADDR, SP) \
+ { write_register (A1_REGNUM, (ADDR)); }
+
+/* Extract from an array REGBUF containing the (raw) register state
+ a function return value of type TYPE, and copy that, in virtual format,
+ into VALBUF. */
+
+#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
+ bcopy (&((char *) REGBUF) [REGISTER_BYTE (S0_REGNUM) + \
+ 8 - TYPE_LENGTH (TYPE)],\
+ VALBUF, TYPE_LENGTH (TYPE))
+
+/* Write into appropriate registers a function return value
+ of type TYPE, given in virtual format. */
+
+#define STORE_RETURN_VALUE(TYPE,VALBUF) \
+ write_register_bytes (REGISTER_BYTE (S0_REGNUM), VALBUF, 8)
+
+/* Extract from an array REGBUF containing the (raw) register state
+ the address in which a function should return its structure value,
+ as a CORE_ADDR (or an expression that can be used as one). */
+
+#define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) \
+ (*(int *) & ((char *) REGBUF) [REGISTER_BYTE (s0_REGNUM)])
+
+/* Define trapped internal variable hooks to read and write
+ vector and communication registers. */
+
+#define IS_TRAPPED_INTERNALVAR is_trapped_internalvar
+#define VALUE_OF_TRAPPED_INTERNALVAR value_of_trapped_internalvar
+#define SET_TRAPPED_INTERNALVAR set_trapped_internalvar
+
+extern struct value *value_of_trapped_internalvar ();
+
+/* Hooks to read data from soff exec and core files,
+ and to describe the files. */
+
+#define XFER_CORE_FILE
+#define FILES_INFO_HOOK print_maps
+
+/* Hook to call to print a typeless integer value, normally printed in decimal.
+ For convex, use hex instead if the number looks like an address. */
+
+#define PRINT_TYPELESS_INTEGER decout
+
+/* For the native compiler, variables for a particular lexical context
+ are listed after the beginning LBRAC instead of before in the
+ executables list of symbols. Using "gcc_compiled." to distinguish
+ between GCC and native compiler doesn't work on Convex because the
+ linker sorts the symbols to put "gcc_compiled." in the wrong place.
+ desc is nonzero for native, zero for gcc. */
+#define VARIABLES_INSIDE_BLOCK(desc, gcc_p) (desc != 0)
+
+/* Pcc occaisionally puts an SO where there should be an SOL. */
+#define PCC_SOL_BROKEN
+
+/* Cannot execute with pc on the stack. */
+#define CANNOT_EXECUTE_STACK
+
+/* Describe the pointer in each stack frame to the previous stack frame
+ (its caller). */
+
+/* FRAME_CHAIN takes a frame_info with a frame's nominal address in fi->frame,
+ and produces the frame's chain-pointer.
+
+ FRAME_CHAIN_COMBINE takes the chain pointer and the frame's nominal address
+ and produces the nominal address of the caller frame.
+
+ However, if FRAME_CHAIN_VALID returns zero,
+ it means the given frame is the outermost one and has no caller.
+ In that case, FRAME_CHAIN_COMBINE is not used. */
+
+/* (caller fp is saved at 8(fp)) */
+
+#define FRAME_CHAIN(fi) (read_memory_integer ((fi)->frame + 8, 4))
+
+#define FRAME_CHAIN_VALID(chain, thisframe) \
+ (chain != 0 && (outside_startup_file (FRAME_SAVED_PC (thisframe))))
+
+#define FRAME_CHAIN_COMBINE(chain, thisframe) (chain)
+
+/* Define other aspects of the stack frame. */
+
+/* A macro that tells us whether the function invocation represented
+ by FI does not have a frame on the stack associated with it. If it
+ does not, FRAMELESS is set to 1, else 0.
+ On convex, check at the return address for `callq' -- if so, frameless,
+ otherwise, not. */
+
+#define FRAMELESS_FUNCTION_INVOCATION(FI, FRAMELESS) \
+{ \
+ extern CORE_ADDR text_start, text_end; \
+ CORE_ADDR call_addr = SAVED_PC_AFTER_CALL (FI); \
+ (FRAMELESS) = (call_addr >= text_start && call_addr < text_end \
+ && read_memory_integer (call_addr - 6, 1) == 0x22); \
+}
+
+#define FRAME_SAVED_PC(fi) (read_memory_integer ((fi)->frame, 4))
+
+#define FRAME_ARGS_ADDRESS(fi) (read_memory_integer ((fi)->frame + 12, 4))
+
+#define FRAME_LOCALS_ADDRESS(fi) (fi)->frame
+
+/* Return number of args passed to a frame.
+ Can return -1, meaning no way to tell. */
+
+#define FRAME_NUM_ARGS(numargs, fi) \
+{ numargs = read_memory_integer (FRAME_ARGS_ADDRESS (fi) - 4, 4); \
+ if (numargs < 0 || numargs >= 256) numargs = -1;}
+
+/* Return number of bytes at start of arglist that are not really args. */
+
+#define FRAME_ARGS_SKIP 0
+
+/* Put here the code to store, into a struct frame_saved_regs,
+ the addresses of the saved registers of frame described by FRAME_INFO.
+ This includes special registers such as pc and fp saved in special
+ ways in the stack frame. sp is even more special:
+ the address we return for it IS the sp for the next frame. */
+
+/* Normal (short) frames save only PC, FP, (callee's) AP. To reasonably
+ handle gcc and pcc register variables, scan the code following the
+ call for the instructions the compiler inserts to reload register
+ variables from stack slots and record the stack slots as the saved
+ locations of those registers. This will occasionally identify some
+ random load as a saved register; this is harmless. vc does not
+ declare its register allocation actions in the stabs. */
+
+#define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \
+{ register int regnum; \
+ register int frame_length = /* 3 short, 2 long, 1 extended, 0 context */\
+ (read_memory_integer ((frame_info)->frame + 4, 4) >> 25) & 3; \
+ register CORE_ADDR frame_fp = \
+ read_memory_integer ((frame_info)->frame + 8, 4); \
+ register CORE_ADDR next_addr; \
+ bzero (&frame_saved_regs, sizeof frame_saved_regs); \
+ (frame_saved_regs).regs[PC_REGNUM] = (frame_info)->frame + 0; \
+ (frame_saved_regs).regs[PS_REGNUM] = (frame_info)->frame + 4; \
+ (frame_saved_regs).regs[FP_REGNUM] = (frame_info)->frame + 8; \
+ (frame_saved_regs).regs[AP_REGNUM] = frame_fp + 12; \
+ next_addr = (frame_info)->frame + 12; \
+ if (frame_length < 3) \
+ for (regnum = A5_REGNUM; regnum < SP_REGNUM; ++regnum) \
+ (frame_saved_regs).regs[regnum] = (next_addr += 4); \
+ if (frame_length < 2) \
+ (frame_saved_regs).regs[SP_REGNUM] = (next_addr += 4); \
+ next_addr -= 4; \
+ if (frame_length < 3) \
+ for (regnum = S7_REGNUM; regnum < S0_REGNUM; ++regnum) \
+ (frame_saved_regs).regs[regnum] = (next_addr += 8); \
+ if (frame_length < 2) \
+ (frame_saved_regs).regs[S0_REGNUM] = (next_addr += 8); \
+ else \
+ (frame_saved_regs).regs[SP_REGNUM] = next_addr + 8; \
+ if (frame_length == 3) { \
+ CORE_ADDR pc = read_memory_integer ((frame_info)->frame, 4); \
+ int op, ix, disp; \
+ op = read_memory_integer (pc, 2); \
+ if ((op & 0xffc7) == 0x1480) pc += 4; /* add.w #-,sp */ \
+ else if ((op & 0xffc7) == 0x58c0) pc += 2; /* add.w #-,sp */ \
+ op = read_memory_integer (pc, 2); \
+ if ((op & 0xffc7) == 0x2a06) pc += 4; /* ld.w -,ap */ \
+ for (;;) { \
+ op = read_memory_integer (pc, 2); \
+ ix = (op >> 3) & 7; \
+ if ((op & 0xfcc0) == 0x2800) { /* ld.- -,ak */ \
+ regnum = SP_REGNUM - (op & 7); \
+ disp = read_memory_integer (pc + 2, 2); \
+ pc += 4;} \
+ else if ((op & 0xfcc0) == 0x2840) { /* ld.- -,ak */ \
+ regnum = SP_REGNUM - (op & 7); \
+ disp = read_memory_integer (pc + 2, 4); \
+ pc += 6;} \
+ if ((op & 0xfcc0) == 0x3000) { /* ld.- -,sk */ \
+ regnum = S0_REGNUM - (op & 7); \
+ disp = read_memory_integer (pc + 2, 2); \
+ pc += 4;} \
+ else if ((op & 0xfcc0) == 0x3040) { /* ld.- -,sk */ \
+ regnum = S0_REGNUM - (op & 7); \
+ disp = read_memory_integer (pc + 2, 4); \
+ pc += 6;} \
+ else if ((op & 0xff00) == 0x7100) { /* br crossjump */ \
+ pc += 2 * (char) op; \
+ continue;} \
+ else if (op == 0x0140) { /* jmp crossjump */ \
+ pc = read_memory_integer (pc + 2, 4); \
+ continue;} \
+ else break; \
+ if ((frame_saved_regs).regs[regnum]) \
+ break; \
+ if (ix == 7) disp += frame_fp; \
+ else if (ix == 6) disp += read_memory_integer (frame_fp + 12, 4); \
+ else if (ix != 0) break; \
+ (frame_saved_regs).regs[regnum] = \
+ disp - 8 + (1 << ((op >> 8) & 3)); \
+ if (regnum >= S7_REGNUM) \
+ (frame_saved_regs).regs[regnum - S0_REGNUM + s0_REGNUM] = \
+ disp - 4 + (1 << ((op >> 8) & 3)); \
+ } \
+ } \
+}
+
+/* Things needed for making the inferior call functions. */
+
+/* Push an empty stack frame, to record the current PC, etc. */
+
+#define PUSH_DUMMY_FRAME \
+{ register CORE_ADDR sp = read_register (SP_REGNUM); \
+ register int regnum; \
+ char buf[8]; \
+ long word; \
+ for (regnum = S0_REGNUM; regnum >= S7_REGNUM; --regnum) { \
+ read_register_bytes (REGISTER_BYTE (regnum), buf, 8); \
+ sp = push_bytes (sp, buf, 8);} \
+ for (regnum = SP_REGNUM; regnum >= FP_REGNUM; --regnum) { \
+ word = read_register (regnum); \
+ sp = push_bytes (sp, &word, 4);} \
+ word = (read_register (PS_REGNUM) &~ (3<<25)) | (1<<25); \
+ sp = push_bytes (sp, &word, 4); \
+ word = read_register (PC_REGNUM); \
+ sp = push_bytes (sp, &word, 4); \
+ write_register (SP_REGNUM, sp); \
+ write_register (FP_REGNUM, sp); \
+ write_register (AP_REGNUM, sp);}
+
+/* Discard from the stack the innermost frame, restoring all registers. */
+
+#define POP_FRAME do {\
+ register CORE_ADDR fp = read_register (FP_REGNUM); \
+ register int regnum; \
+ register int frame_length = /* 3 short, 2 long, 1 extended, 0 context */ \
+ (read_memory_integer (fp + 4, 4) >> 25) & 3; \
+ char buf[8]; \
+ write_register (PC_REGNUM, read_memory_integer (fp, 4)); \
+ write_register (PS_REGNUM, read_memory_integer (fp += 4, 4)); \
+ write_register (FP_REGNUM, read_memory_integer (fp += 4, 4)); \
+ write_register (AP_REGNUM, read_memory_integer (fp += 4, 4)); \
+ if (frame_length < 3) \
+ for (regnum = A5_REGNUM; regnum < SP_REGNUM; ++regnum) \
+ write_register (regnum, read_memory_integer (fp += 4, 4)); \
+ if (frame_length < 2) \
+ write_register (SP_REGNUM, read_memory_integer (fp += 4, 4)); \
+ fp -= 4; \
+ if (frame_length < 3) \
+ for (regnum = S7_REGNUM; regnum < S0_REGNUM; ++regnum) { \
+ read_memory (fp += 8, buf, 8); \
+ write_register_bytes (REGISTER_BYTE (regnum), buf, 8);} \
+ if (frame_length < 2) { \
+ read_memory (fp += 8, buf, 8); \
+ write_register_bytes (REGISTER_BYTE (regnum), buf, 8);} \
+ else write_register (SP_REGNUM, fp + 8); \
+ flush_cached_frames (); \
+ set_current_frame (create_new_frame (read_register (FP_REGNUM), \
+ read_pc ())); \
+} while (0)
+
+/* This sequence of words is the instructions
+ mov sp,ap
+ pshea 69696969
+ calls 32323232
+ bkpt
+ Note this is 16 bytes. */
+
+#define CALL_DUMMY {0x50860d4069696969LL,0x2140323232327d50LL}
+
+#define CALL_DUMMY_LENGTH 16
+
+#define CALL_DUMMY_START_OFFSET 0
+
+/* Insert the specified number of args and function address
+ into a call sequence of the above form stored at DUMMYNAME. */
+
+#define FIX_CALL_DUMMY(dummyname, pc, fun, nargs, args, type, gcc_p) \
+{ *(int *)((char *) dummyname + 4) = nargs; \
+ *(int *)((char *) dummyname + 10) = fun; }
+
+/* Defs to read soff symbol tables, see dbxread.c */
+
+#define NUMBER_OF_SYMBOLS ((long) opthdr.o_nsyms)
+#define STRING_TABLE_OFFSET ((long) filehdr.h_strptr)
+#define SYMBOL_TABLE_OFFSET ((long) opthdr.o_symptr)
+#define STRING_TABLE_SIZE ((long) filehdr.h_strsiz)
+#define SIZE_OF_TEXT_SEGMENT ((long) txthdr.s_size)
+#define ENTRY_POINT ((long) opthdr.o_entry)
+
+#define READ_STRING_TABLE_SIZE(BUFFER) \
+ (BUFFER = STRING_TABLE_SIZE)
+
+#define DECLARE_FILE_HEADERS \
+ FILEHDR filehdr; \
+ OPTHDR opthdr; \
+ SCNHDR txthdr
+
+#define READ_FILE_HEADERS(DESC,NAME) \
+{ \
+ int n; \
+ val = myread (DESC, &filehdr, sizeof filehdr); \
+ if (val < 0) \
+ perror_with_name (NAME); \
+ if (! IS_SOFF_MAGIC (filehdr.h_magic)) \
+ error ("%s: not an executable file.", NAME); \
+ lseek (DESC, 0L, 0); \
+ if (myread (DESC, &filehdr, sizeof filehdr) < 0) \
+ perror_with_name (NAME); \
+ if (myread (DESC, &opthdr, filehdr.h_opthdr) <= 0) \
+ perror_with_name (NAME); \
+ for (n = 0; n < filehdr.h_nscns; n++) \
+ { \
+ if (myread (DESC, &txthdr, sizeof txthdr) < 0) \
+ perror_with_name (NAME); \
+ if ((txthdr.s_flags & S_TYPMASK) == S_TEXT) \
+ break; \
+ } \
+}
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