Mercurial > repo
diff perl-5.22.2/os2/dl_os2.c @ 8045:a16537d2fe07
<xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
author | HackBot |
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date | Sat, 14 May 2016 14:54:38 +0000 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/perl-5.22.2/os2/dl_os2.c Sat May 14 14:54:38 2016 +0000 @@ -0,0 +1,195 @@ +#include "dlfcn.h" +#include "string.h" +#include "stdio.h" + +#define INCL_BASE +#include <os2.h> +#include <float.h> +#include <stdlib.h> + +static ULONG retcode; +static char fail[300]; + +static ULONG dllHandle; +static int handle_found; +static int handle_loaded; +#ifdef PERL_CORE + +#include "EXTERN.h" +#include "perl.h" + +#else + +char *os2error(int rc); + +#endif + +#ifdef DLOPEN_INITTERM +unsigned long _DLL_InitTerm(unsigned long modHandle, unsigned long flag) +{ + switch (flag) { + case 0: /* INIT */ + /* Save handle */ + dllHandle = modHandle; + handle_found = 1; + return TRUE; + + case 1: /* TERM */ + handle_found = 0; + dllHandle = (unsigned long)NULLHANDLE; + return TRUE; + } + + return FALSE; +} + +#endif + +HMODULE +find_myself(void) +{ + + static APIRET APIENTRY (*pDosQueryModFromEIP) (HMODULE * hmod, ULONG * obj, ULONG BufLen, PCHAR Buf, + ULONG * Offset, ULONG Address); + HMODULE doscalls_h, mod; + static int failed; + ULONG obj, offset, rc; + char buf[260]; + + if (failed) + return 0; + failed = 1; + doscalls_h = (HMODULE)dlopen("DOSCALLS",0); + if (!doscalls_h) + return 0; +/* {&doscalls_handle, NULL, 360}, */ /* DosQueryModFromEIP */ + rc = DosQueryProcAddr(doscalls_h, 360, 0, (PFN*)&pDosQueryModFromEIP); + if (rc) + return 0; + rc = pDosQueryModFromEIP(&mod, &obj, sizeof(buf), buf, &offset, (ULONG)dlopen); + if (rc) + return 0; + failed = 0; + handle_found = 1; + dllHandle = mod; + return mod; +} + +void * +dlopen(const char *path, int mode) +{ + HMODULE handle; + char tmp[260]; + const char *beg, *dot; + ULONG rc; + unsigned fpflag = _control87(0,0); + + fail[0] = 0; + if (!path) { /* Our own handle. */ + if (handle_found || find_myself()) { + char dllname[260]; + + if (handle_loaded) + return (void*)dllHandle; + rc = DosQueryModuleName(dllHandle, sizeof(dllname), dllname); + if (rc) { + strcpy(fail, "can't find my DLL name by the handle"); + retcode = rc; + return 0; + } + rc = DosLoadModule(fail, sizeof fail, dllname, &handle); + if (rc) { + strcpy(fail, "can't load my own DLL"); + retcode = rc; + return 0; + } + handle_loaded = 1; + goto ret; + } + retcode = ERROR_MOD_NOT_FOUND; + strcpy(fail, "can't load from myself: compiled without -DDLOPEN_INITTERM"); + return 0; + } + if ((rc = DosLoadModule(fail, sizeof fail, (char*)path, &handle)) == 0) + goto ret; + + retcode = rc; + + if (strlen(path) >= sizeof(tmp)) + return NULL; + + /* Not found. Check for non-FAT name and try truncated name. */ + /* Don't know if this helps though... */ + for (beg = dot = path + strlen(path); + beg > path && !strchr(":/\\", *(beg-1)); + beg--) + if (*beg == '.') + dot = beg; + if (dot - beg > 8) { + int n = beg+8-path; + + memmove(tmp, path, n); + memmove(tmp+n, dot, strlen(dot)+1); + if (DosLoadModule(fail, sizeof fail, tmp, &handle) == 0) + goto ret; + } + handle = 0; + + ret: + _control87(fpflag, MCW_EM); /* Some modules reset FP flags on load */ + return (void *)handle; +} + +#define ERROR_WRONG_PROCTYPE 0xffffffff + +void * +dlsym(void *handle, const char *symbol) +{ + ULONG rc, type; + PFN addr; + + fail[0] = 0; + rc = DosQueryProcAddr((HMODULE)handle, 0, symbol, &addr); + if (rc == 0) { + rc = DosQueryProcType((HMODULE)handle, 0, symbol, &type); + if (rc == 0 && type == PT_32BIT) + return (void *)addr; + rc = ERROR_WRONG_PROCTYPE; + } + retcode = rc; + return NULL; +} + +char * +dlerror(void) +{ + static char buf[700]; + ULONG len; + char *err; + + if (retcode == 0) + return NULL; + if (retcode == ERROR_WRONG_PROCTYPE) + err = "Wrong procedure type"; + else + err = os2error(retcode); + len = strlen(err); + if (len > sizeof(buf) - 1) + len = sizeof(buf) - 1; + strncpy(buf, err, len+1); + if (fail[0] && len + strlen(fail) < sizeof(buf) - 100) + sprintf(buf + len, ", possible problematic module: '%s'", fail); + retcode = 0; + return buf; +} + +int +dlclose(void *handle) +{ + ULONG rc; + + if ((rc = DosFreeModule((HMODULE)handle)) == 0) return 0; + + retcode = rc; + return 2; +}