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Annotation of src/usr.bin/nm/byte.c, Revision 1.5

1.5     ! deraadt     1: /* $OpenBSD: byte.c,v 1.4 2003/11/07 04:43:14 mickey Exp $ */
1.1       espie       2: /*
1.5     ! deraadt     3:  * Copyright (c) 1999
1.1       espie       4:  *     Marc Espie.  All rights reserved.
                      5:  *
                      6:  * Redistribution and use in source and binary forms, with or without
                      7:  * modification, are permitted provided that the following conditions
                      8:  * are met:
                      9:  * 1. Redistributions of source code must retain the above copyright
                     10:  *    notice, this list of conditions and the following disclaimer.
                     11:  */
                     12:
1.5     ! deraadt    13: /*
        !            14:  * A set of routines to read object files and compensate for host
1.1       espie      15:  * endianness
                     16:  */
1.5     ! deraadt    17: static int
        !            18: byte_sex(int mid)
1.1       espie      19: {
1.5     ! deraadt    20:        switch (mid) {
1.1       espie      21:        case MID_I386:
                     22:        case MID_VAX:
                     23:        case MID_ALPHA:
                     24:        case MID_PMAX:
                     25:                return LITTLE_ENDIAN;
                     26:        case MID_M68K:
                     27:        case MID_M68K4K:
                     28:        case MID_M88K:
                     29:        case MID_SUN010:
                     30:        case MID_SUN020:
                     31:        case MID_HP200:
                     32:        case MID_HP300:
1.4       mickey     33:        case MID_HPPA:
1.1       espie      34:        case MID_HPUX800:
                     35:        case MID_HPUX:
                     36:        case MID_SPARC:
                     37:        case MID_MIPS:
1.3       espie      38:        case MID_SPARC64:
                     39:        case MID_POWERPC:
1.1       espie      40:                return BIG_ENDIAN;
1.5     ! deraadt    41:        default:
        !            42:                /* we don't know what this is, so we don't want to process it */
1.1       espie      43:                return 0;
                     44:        }
                     45: }
                     46:
                     47: #define BAD_OBJECT(h)  (N_BADMAG(h) || !byte_sex(N_GETMID(h)))
                     48:
                     49: /* handles endianess swaps */
1.5     ! deraadt    50: static void
        !            51: swap_u32s(u_int32_t *h, size_t n)
1.1       espie      52: {
                     53:        size_t i;
                     54:
                     55:        for (i = 0; i < n; i++)
                     56:                h[i] = swap32(h[i]);
                     57: }
                     58:
1.5     ! deraadt    59: static void
        !            60: fix_header_order(struct exec *h)
1.1       espie      61: {
                     62:        if (byte_sex(N_GETMID(*h)) != BYTE_ORDER)
                     63:                swap_u32s( ((u_int32_t *)(h))+1, sizeof *h/sizeof(u_int32_t) - 1);
                     64: }
                     65:
1.5     ! deraadt    66: static long
        !            67: fix_long_order(long l, int mid)
1.1       espie      68: {
                     69:        if (byte_sex(mid) != BYTE_ORDER)
                     70:                return swap32(l);
                     71:        else
                     72:                return l;
                     73: }
                     74:
1.5     ! deraadt    75: static void
        !            76: swap_nlist(struct nlist *p)
1.1       espie      77: {
                     78:        p->n_un.n_strx = swap32(p->n_un.n_strx);
                     79:        p->n_desc = swap16(p->n_desc);
                     80:        p->n_value = swap32(p->n_value);
                     81: }
                     82:
1.5     ! deraadt    83: static void
        !            84: fix_nlist_order(struct nlist *p, int mid)
1.1       espie      85: {
                     86:        if (byte_sex(mid) != BYTE_ORDER)
                     87:                swap_nlist(p);
                     88: }
                     89:
1.5     ! deraadt    90: static void
        !            91: fix_nlists_order(struct nlist *p, size_t n, int mid)
1.1       espie      92: {
1.2       espie      93:        size_t i;
1.1       espie      94:
                     95:        if (byte_sex(mid) != BYTE_ORDER)
                     96:                for (i = 0; i < n; i++)
                     97:                        swap_nlist(p+i);
                     98: }
                     99:
1.5     ! deraadt   100: static void
        !           101: fix_ranlib_order(struct ranlib *r, int mid)
1.1       espie     102: {
                    103:        if (byte_sex(mid) != BYTE_ORDER) {
                    104:                r->ran_un.ran_strx = swap32(r->ran_un.ran_strx);
                    105:                r->ran_off = swap32(r->ran_off);
                    106:        }
                    107: }