| 1 | /* dl_next.xs
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| 2 | *
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| 3 | * Platform: NeXT NS 3.2
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| 4 | * Author: Anno Siegel ([email protected])
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| 5 | * Based on: dl_dlopen.xs by Paul Marquess
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| 6 | * Created: Aug 15th, 1994
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| 7 | *
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| 8 | */
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| 9 |
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| 10 | /*
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| 11 | And Gandalf said: 'Many folk like to know beforehand what is to
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| 12 | be set on the table; but those who have laboured to prepare the
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| 13 | feast like to keep their secret; for wonder makes the words of
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| 14 | praise louder.'
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| 15 | */
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| 16 |
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| 17 | /* Porting notes:
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| 18 |
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| 19 | dl_next.xs is itself a port from dl_dlopen.xs by Paul Marquess. It
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| 20 | should not be used as a base for further ports though it may be used
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| 21 | as an example for how dl_dlopen.xs can be ported to other platforms.
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| 22 |
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| 23 | The method used here is just to supply the sun style dlopen etc.
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| 24 | functions in terms of NeXTs rld_*. The xs code proper is unchanged
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| 25 | from Paul's original.
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| 26 |
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| 27 | The port could use some streamlining. For one, error handling could
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| 28 | be simplified.
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| 29 |
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| 30 | Anno Siegel
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| 31 |
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| 32 | */
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| 33 |
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| 34 | #if NS_TARGET_MAJOR >= 4
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| 35 | #else
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| 36 | /* include these before perl headers */
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| 37 | #include <mach-o/rld.h>
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| 38 | #include <streams/streams.h>
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| 39 | #endif
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| 40 |
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| 41 | #include "EXTERN.h"
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| 42 | #include "perl.h"
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| 43 | #include "XSUB.h"
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| 44 |
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| 45 | #define DL_LOADONCEONLY
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| 46 |
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| 47 | typedef struct {
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| 48 | AV * x_resolve_using;
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| 49 | } my_cxtx_t; /* this *must* be named my_cxtx_t */
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| 50 |
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| 51 | #define DL_CXT_EXTRA /* ask for dl_cxtx to be defined in dlutils.c */
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| 52 | #include "dlutils.c" /* SaveError() etc */
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| 53 |
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| 54 | #define dl_resolve_using (dl_cxtx.x_resolve_using)
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| 55 |
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| 56 | static char *dlerror()
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| 57 | {
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| 58 | dTHX;
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| 59 | dMY_CXT;
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| 60 | return dl_last_error;
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| 61 | }
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| 62 |
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| 63 | int dlclose(handle) /* stub only */
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| 64 | void *handle;
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| 65 | {
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| 66 | return 0;
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| 67 | }
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| 68 |
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| 69 | #if NS_TARGET_MAJOR >= 4
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| 70 | #import <mach-o/dyld.h>
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| 71 |
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| 72 | enum dyldErrorSource
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| 73 | {
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| 74 | OFImage,
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| 75 | };
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| 76 |
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| 77 | static void TranslateError
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| 78 | (const char *path, enum dyldErrorSource type, int number)
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| 79 | {
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| 80 | dTHX;
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| 81 | dMY_CXT;
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| 82 | char *error;
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| 83 | unsigned int index;
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| 84 | static char *OFIErrorStrings[] =
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| 85 | {
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| 86 | "%s(%d): Object Image Load Failure\n",
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| 87 | "%s(%d): Object Image Load Success\n",
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| 88 | "%s(%d): Not a recognisable object file\n",
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| 89 | "%s(%d): No valid architecture\n",
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| 90 | "%s(%d): Object image has an invalid format\n",
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| 91 | "%s(%d): Invalid access (permissions?)\n",
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| 92 | "%s(%d): Unknown error code from NSCreateObjectFileImageFromFile\n",
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| 93 | };
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| 94 | #define NUM_OFI_ERRORS (sizeof(OFIErrorStrings) / sizeof(OFIErrorStrings[0]))
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| 95 |
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| 96 | switch (type)
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| 97 | {
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| 98 | case OFImage:
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| 99 | index = number;
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| 100 | if (index > NUM_OFI_ERRORS - 1)
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| 101 | index = NUM_OFI_ERRORS - 1;
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| 102 | error = Perl_form_nocontext(OFIErrorStrings[index], path, number);
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| 103 | break;
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| 104 |
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| 105 | default:
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| 106 | error = Perl_form_nocontext("%s(%d): Totally unknown error type %d\n",
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| 107 | path, number, type);
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| 108 | break;
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| 109 | }
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| 110 | Safefree(dl_last_error);
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| 111 | dl_last_error = savepv(error);
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