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Annotation of cci/usr/src/usr.lib/libF77/main.c, revision 1.1

1.1     ! root        1: /*
        !             2:  *     @(#)main.c      2.1
        !             3:  */
        !             4: #include <stdio.h>
        !             5: #include <signal.h>
        !             6: #include "../libI77/fiodefs.h"
        !             7: 
        !             8: #define ILL_ALIGN_FAULT 14
        !             9: 
        !            10: extern int errno;
        !            11: char *getenv();
        !            12: 
        !            13: int xargc;
        !            14: char **xargv;
        !            15: 
        !            16: main(argc, argv, arge)
        !            17: int argc;
        !            18: char **argv;
        !            19: char **arge;
        !            20: {
        !            21: int sigdie();
        !            22: long int (*sigf)();
        !            23: int signum;
        !            24: 
        !            25: xargc = argc;
        !            26: xargv = argv;
        !            27: 
        !            28: for (signum=1; signum<=16; signum++)
        !            29: {
        !            30:        if((sigf=signal(signum, sigdie)) != SIG_DFL) signal(signum, sigf);
        !            31: }
        !            32: 
        !            33: f_init();
        !            34: MAIN_();
        !            35: f_exit();
        !            36: return 0;
        !            37: }
        !            38: 
        !            39: struct action {
        !            40:        char *mesg;
        !            41:        int   core;
        !            42: } sig_act[16] = {
        !            43:        {"Hangup", 0},                  /* SIGHUP  */
        !            44:        {"Interrupt!", 0},              /* SIGINT  */
        !            45:        {"Quit!", 1},                   /* SIGQUIT */
        !            46:        {"Illegal ", 1},                /* SIGILL  */
        !            47:        {"Trace Trap", 1},              /* SIGTRAP */
        !            48:        {"IOT Trap", 1},                /* SIGIOT  */
        !            49:        {"EMT Trap", 1},                /* SIGEMT  */
        !            50:        {"Arithmetic Exception", 1},    /* SIGFPE  */
        !            51:        { 0, 0},                        /* SIGKILL */
        !            52:        {"Bus error", 1},               /* SIGBUS  */
        !            53:        {"Segmentation violation", 1},  /* SIGSEGV */
        !            54:        {"Sys arg", 1},                 /* SIGSYS  */
        !            55:        {"Open pipe", 0},               /* SIGPIPE */
        !            56:        {"Alarm", 0},                   /* SIGALRM */
        !            57:        {"Terminated", 0},              /* SIGTERM */
        !            58:        {"Sig 16", 0},                  /* unassigned */
        !            59: };
        !            60: 
        !            61: /* The following arrays are defined & used assuming that signal codes are 
        !            62:    1 to 5 for SIGFPE, and 0 to 3 for SIGILL. 
        !            63:    Actually ILL_ALIGN_FAULT=14, and is mapped to 3. */
        !            64: 
        !            65: #define N_ACT_FPE 5                    /* number of entries in act_fpe[] */
        !            66: 
        !            67: struct action act_fpe[] = {
        !            68:        {"Integer overflow", 1},
        !            69:        {"Integer divide by 0", 1},
        !            70:        {"Floating divide by zero", 1},
        !            71:        {"Floating point overflow", 1},
        !            72:        {"Floating point underflow", 1},
        !            73: };
        !            74: 
        !            75: #define N_ACT_ILL 4                    /* number of entries in act_ill[] */
        !            76: 
        !            77: struct action act_ill[] = {
        !            78:        {"addr mode", 1},
        !            79:        {"instruction", 1},
        !            80:        {"operand", 0},
        !            81:        {"alignment", 1},
        !            82: };
        !            83: 
        !            84: 
        !            85: sigdie(s, t, sc)
        !            86: int s; int t; struct sigcontext *sc;
        !            87: {
        !            88: extern unit units[];
        !            89: register struct action *act = &sig_act[s-1];
        !            90: /* print error message, then flush buffers */
        !            91: 
        !            92: if (s == SIGHUP || s == SIGINT || s == SIGQUIT)
        !            93:        signal(s, SIG_IGN);     /* don't allow it again */
        !            94: else
        !            95:        signal(s, SIG_DFL);     /* shouldn't happen again, but ... */
        !            96: 
        !            97: if (act->mesg)
        !            98:        {
        !            99:        fprintf(units[STDERR].ufd, "*** %s", act->mesg);
        !           100:        if (s == SIGFPE)
        !           101:                {
        !           102:                if ((t-1) >= 0 && t < N_ACT_FPE)
        !           103:                        fprintf(units[STDERR].ufd, ": %s", act_fpe[t-1].mesg);
        !           104:                else
        !           105:                        fprintf(units[STDERR].ufd, ": Type=%d?", t);
        !           106:                }
        !           107:        else if (s == SIGILL)
        !           108:                {
        !           109:                if (t == ILL_ALIGN_FAULT)       /* ILL_ALIGN_FAULT maps to last
        !           110:                        t = N_ACT_ILL-1;           entry in act_ill[] */
        !           111:                if (t >= 0 && t < N_ACT_ILL)
        !           112:                        fprintf(units[STDERR].ufd, "%s", act_ill[t].mesg);
        !           113:                else
        !           114:                        fprintf(units[STDERR].ufd, "compat mode: Code=%d", t);
        !           115:                }
        !           116:        putc('\n', units[STDERR].ufd);
        !           117:        }
        !           118: f77_abort( s, act->core );
        !           119: }
        !           120: 
        !           121: extern int _dbsubc;    /* dbsubc is non-zero if -lg was specified to ld */
        !           122: f77_abort( err_val, act_core )
        !           123: {
        !           124:        char first_char, *env_var;
        !           125:        int core_dump;
        !           126: 
        !           127:        env_var = getenv("f77_dump_flag");
        !           128:        first_char = (env_var == NULL) ? 0 : *env_var;
        !           129: 
        !           130:        signal(SIGILL, SIG_DFL);
        !           131:        sigsetmask(0);                  /* don't block */
        !           132: 
        !           133:        /* see if we want a core dump:
        !           134:                first line checks for signals like hangup - don't dump then.
        !           135:                second line checks if -lg specified to ld (e.g. by saying
        !           136:                        -g to f77) and checks the f77_dump_flag var. */
        !           137:        core_dump = ((nargs() != 2) || act_core) &&
        !           138:            ( (_dbsubc && (first_char != 'n')) || first_char == 'y');
        !           139: 
        !           140:        if( !core_dump )
        !           141:                fprintf(units[STDERR].ufd,"*** Execution terminated\n");
        !           142: 
        !           143:        f_exit();
        !           144:        _cleanup();
        !           145:        if( nargs() ) errno = err_val;
        !           146:        else errno = -2;   /* prior value will be meaningless,
        !           147:                                so set it to undefined value */
        !           148: 
        !           149:        if( core_dump ) abort();
        !           150:        else  exit( errno );
        !           151: }

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