projects / apple / libplatform.git / blame
| Commit | Line | Data |
|---|---|---|
| ada7c492 A |
1 | /* |
| 2 | * Copyright (c) 2013 Apple Inc. All rights reserved. | |
| 3 | * | |
| 4 | * @APPLE_LICENSE_HEADER_START@ | |
| 5 | * | |
| 6 | * This file contains Original Code and/or Modifications of Original Code | |
| 7 | * as defined in and that are subject to the Apple Public Source License | |
| 8 | * Version 2.0 (the 'License'). You may not use this file except in | |
| 9 | * compliance with the License. Please obtain a copy of the License at | |
| 10 | * http://www.opensource.apple.com/apsl/ and read it before using this | |
| 11 | * file. | |
| 12 | * | |
| 13 | * The Original Code and all software distributed under the License are | |
| 14 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER | |
| 15 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, | |
| 16 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| 17 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. | |
| 18 | * Please see the License for the specific language governing rights and | |
| 19 | * limitations under the License. | |
| 20 | * | |
| 21 | * @APPLE_LICENSE_HEADER_END@ | |
| 22 | */ | |
| 23 | ||
| 24 | #include <limits.h> | |
| 25 | #include <stdint.h> | |
| 26 | #include <stdlib.h> | |
| 27 | #include <machine/cpu_capabilities.h> | |
| 28 | ||
| 29 | #include <_simple.h> | |
| 30 | ||
| 31 | #include <platform/string.h> | |
| 32 | #include <platform/compat.h> | |
| 33 | ||
| 34 | __attribute__ ((visibility ("hidden"))) | |
| 35 | uintptr_t commpage_pfz_base=0; | |
| 36 | ||
| 37 | __attribute__ ((visibility ("hidden"))) | |
| 38 | void | |
| 39 | __pfz_setup(const char *apple[]) | |
| 40 | { | |
| 41 | const char *p = _simple_getenv(apple, "pfz"); | |
| 42 | if (p != NULL) { | |
| 43 | const char *q; | |
| 44 | ||
| 45 | /* We are given hex starting with 0x */ | |
| 46 | if (p[0] != '0' || p[1] != 'x') { | |
| 47 | goto __pfz_setup_clear; | |
| 48 | } | |
| 49 | ||
| 50 | for (q = p + 2; *q; q++) { | |
| 51 | commpage_pfz_base <<= 4; // *= 16 | |
| 52 | ||
| 53 | if ('0' <= *q && *q <= '9') { | |
| 54 | commpage_pfz_base += *q - '0'; | |
| 55 | } else if ('a' <= *q && *q <= 'f') { | |
| 56 | commpage_pfz_base += *q - 'a' + 10; | |
| 57 | } else if ('A' <= *q && *q <= 'F') { | |
| 58 | commpage_pfz_base += *q - 'A' + 10; | |
| 59 | } else { | |
| 60 | commpage_pfz_base=0; | |
| 61 | goto __pfz_setup_clear; | |
| 62 | } | |
| 63 | } | |
| 64 | ||
| 65 | __pfz_setup_clear: | |
| 66 | bzero((void *)((uintptr_t)p - 4), strlen(p) + 4); | |
| 67 | } | |
| 68 | ||
| 69 | if (commpage_pfz_base == 0) { | |
| 70 | commpage_pfz_base = _COMM_PAGE_TEXT_START; | |
| 71 | } | |
| 72 | } |