mirror of
https://gitlab.com/bztsrc/posix-uefi.git
synced 2024-12-29 05:55:31 +01:00
365 lines
11 KiB
C
365 lines
11 KiB
C
/*
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* stdlib.c
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*
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* Copyright (C) 2021 bzt (bztsrc@gitlab)
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy,
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* modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* This file is part of the POSIX-UEFI package.
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* @brief Implementing functions which are defined in stdlib.h
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*
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*/
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#include <uefi.h>
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int errno = 0;
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static uint64_t __srand_seed = 6364136223846793005ULL;
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extern void __stdio_cleanup();
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#ifndef UEFI_NO_TRACK_ALLOC
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static uintptr_t *__stdlib_allocs = NULL;
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static uintn_t __stdlib_numallocs = 0;
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#endif
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int atoi(const char_t *s)
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{
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return (int)atol(s);
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}
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int64_t atol(const char_t *s)
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{
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int64_t sign = 1;
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if(!s || !*s) return 0;
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if(*s == CL('-')) { sign = -1; s++; }
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if(s[0] == CL('0')) {
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if(s[1] == CL('x'))
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return strtol(s + 2, NULL, 16) * sign;
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if(s[1] >= CL('0') && s[1] <= CL('7'))
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return strtol(s, NULL, 8) * sign;
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}
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return strtol(s, NULL, 10) * sign;
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}
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int64_t strtol (const char_t *s, char_t **__endptr, int __base)
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{
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int64_t v=0, sign = 1;
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if(!s || !*s) return 0;
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if(*s == CL('-')) { sign = -1; s++; }
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while(!(*s < CL('0') || (__base < 10 && *s >= __base + CL('0')) || (__base >= 10 && ((*s > CL('9') && *s < CL('A')) ||
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(*s > CL('F') && *s < CL('a')) || *s > CL('f'))))) {
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v *= __base;
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if(*s >= CL('0') && *s <= (__base < 10 ? __base + CL('0') : CL('9')))
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v += (*s)-CL('0');
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else if(__base == 16 && *s >= CL('a') && *s <= CL('f'))
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v += (*s)-CL('a')+10;
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else if(__base == 16 && *s >= CL('A') && *s <= CL('F'))
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v += (*s)-CL('A')+10;
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s++;
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};
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if(__endptr) *__endptr = (char_t*)s;
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return v * sign;
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}
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void *malloc (size_t __size)
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{
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void *ret = NULL;
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efi_status_t status;
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#ifndef UEFI_NO_TRACK_ALLOC
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uintn_t i;
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for(i = 0; i < __stdlib_numallocs && __stdlib_allocs[i] != 0; i += 2);
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if(i == __stdlib_numallocs) {
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/* no free slots found, (re)allocate the housekeeping array */
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status = BS->AllocatePool(LIP ? LIP->ImageDataType : EfiLoaderData, (__stdlib_numallocs + 2) * sizeof(uintptr_t), &ret);
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if(EFI_ERROR(status) || !ret) { errno = ENOMEM; return NULL; }
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if(__stdlib_allocs) memcpy(ret, __stdlib_allocs, __stdlib_numallocs * sizeof(uintptr_t));
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__stdlib_allocs = (uintptr_t*)ret;
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__stdlib_allocs[i] = __stdlib_allocs[i + 1] = 0;
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__stdlib_numallocs += 2;
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ret = NULL;
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}
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#endif
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status = BS->AllocatePool(LIP ? LIP->ImageDataType : EfiLoaderData, __size, &ret);
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if(EFI_ERROR(status) || !ret) { errno = ENOMEM; ret = NULL; }
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#ifndef UEFI_NO_TRACK_ALLOC
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__stdlib_allocs[i] = (uintptr_t)ret;
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__stdlib_allocs[i + 1] = (uintptr_t)__size;
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#endif
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return ret;
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}
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void *calloc (size_t __nmemb, size_t __size)
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{
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void *ret = malloc(__nmemb * __size);
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if(ret) memset(ret, 0, __nmemb * __size);
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return ret;
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}
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void *realloc (void *__ptr, size_t __size)
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{
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void *ret = NULL;
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efi_status_t status;
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#ifndef UEFI_NO_TRACK_ALLOC
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uintn_t i;
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#endif
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if(!__ptr) return malloc(__size);
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if(!__size) { free(__ptr); return NULL; }
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#ifndef UEFI_NO_TRACK_ALLOC
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/* get the slot which stores the old size for this buffer */
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for(i = 0; i < __stdlib_numallocs && __stdlib_allocs[i] != (uintptr_t)__ptr; i += 2);
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if(i == __stdlib_numallocs) { errno = ENOMEM; return NULL; }
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/* allocate a new buffer and copy data from old buffer */
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status = BS->AllocatePool(LIP ? LIP->ImageDataType : EfiLoaderData, __size, &ret);
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if(EFI_ERROR(status) || !ret) { errno = ENOMEM; ret = NULL; }
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else {
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memcpy(ret, (void*)__stdlib_allocs[i], __stdlib_allocs[i + 1] < __size ? __stdlib_allocs[i + 1] : __size);
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if(__size > __stdlib_allocs[i + 1]) memset((uint8_t*)ret + __stdlib_allocs[i + 1], 0, __size - __stdlib_allocs[i + 1]);
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/* free old buffer and store new buffer in slot */
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BS->FreePool((void*)__stdlib_allocs[i]);
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__stdlib_allocs[i] = (uintptr_t)ret;
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__stdlib_allocs[i + 1] = (uintptr_t)__size;
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}
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#else
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status = BS->AllocatePool(LIP ? LIP->ImageDataType : EfiLoaderData, __size, &ret);
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if(EFI_ERROR(status) || !ret) { errno = ENOMEM; return NULL; }
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/* this means out of bounds read, but fine with POSIX as the end of new buffer supposed to be left uninitialized) */
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memcpy(ret, (void*)__ptr, __size);
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BS->FreePool((void*)__ptr);
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#endif
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return ret;
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}
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void free (void *__ptr)
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{
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efi_status_t status;
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#ifndef UEFI_NO_TRACK_ALLOC
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uintn_t i;
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#endif
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if(!__ptr) { errno = ENOMEM; return; }
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#ifndef UEFI_NO_TRACK_ALLOC
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/* find and clear the slot */
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for(i = 0; i < __stdlib_numallocs && __stdlib_allocs[i] != (uintptr_t)__ptr; i += 2);
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if(i == __stdlib_numallocs) { errno = ENOMEM; return; }
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__stdlib_allocs[i] = 0;
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__stdlib_allocs[i + 1] = 0;
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/* if there are only empty slots, free the housekeeping array too */
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for(i = 0; i < __stdlib_numallocs && __stdlib_allocs[i] == 0; i += 2);
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if(i == __stdlib_numallocs) { BS->FreePool(__stdlib_allocs); __stdlib_allocs = NULL; __stdlib_numallocs = 0; }
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#endif
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status = BS->FreePool(__ptr);
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if(EFI_ERROR(status)) errno = ENOMEM;
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}
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void abort ()
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{
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#ifndef UEFI_NO_TRACK_ALLOC
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if(__stdlib_allocs)
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BS->FreePool(__stdlib_allocs);
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__stdlib_allocs = NULL;
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__stdlib_numallocs = 0;
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#endif
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__stdio_cleanup();
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BS->Exit(IM, EFI_ABORTED, 0, NULL);
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}
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void exit (int __status)
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{
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#ifndef UEFI_NO_TRACK_ALLOC
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if(__stdlib_allocs)
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BS->FreePool(__stdlib_allocs);
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__stdlib_allocs = NULL;
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__stdlib_numallocs = 0;
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#endif
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__stdio_cleanup();
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BS->Exit(IM, !__status ? 0 : (__status < 0 ? EFIERR(-__status) : EFIERR(__status)), 0, NULL);
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}
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int exit_bs()
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{
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efi_status_t status;
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efi_memory_descriptor_t *memory_map = NULL;
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uintn_t cnt = 3, memory_map_size=0, map_key=0, desc_size=0;
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#ifndef UEFI_NO_TRACK_ALLOC
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if(__stdlib_allocs)
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BS->FreePool(__stdlib_allocs);
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__stdlib_allocs = NULL;
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__stdlib_numallocs = 0;
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#endif
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__stdio_cleanup();
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while(cnt--) {
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status = BS->GetMemoryMap(&memory_map_size, memory_map, &map_key, &desc_size, NULL);
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if (status!=EFI_BUFFER_TOO_SMALL) break;
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status = BS->ExitBootServices(IM, map_key);
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if(!EFI_ERROR(status)) return 0;
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}
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return (int)(status & 0xffff);
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}
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void *bsearch(const void *key, const void *base, size_t nmemb, size_t size, __compar_fn_t cmp)
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{
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uint64_t s=0, e=nmemb, m;
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int ret;
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while (s < e) {
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m = s + (e-s)/2;
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ret = cmp(key, (uint8_t*)base + m*size);
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if (ret < 0) e = m; else
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if (ret > 0) s = m+1; else
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return (void *)((uint8_t*)base + m*size);
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}
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return NULL;
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}
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int mblen(const char *s, size_t n)
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{
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const char *e = s+n;
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int c = 0;
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if(s) {
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while(s < e && *s) {
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if((*s & 128) != 0) {
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if((*s & 32) == 0 ) s++; else
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if((*s & 16) == 0 ) s+=2; else
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if((*s & 8) == 0 ) s+=3;
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}
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c++;
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s++;
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}
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}
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return c;
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}
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int mbtowc (wchar_t * __pwc, const char *s, size_t n)
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{
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wchar_t arg;
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int ret = 1;
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if(!s || !*s) return 0;
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arg = (wchar_t)*s;
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if((*s & 128) != 0) {
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if((*s & 32) == 0 && n > 0) { arg = ((*s & 0x1F)<<6)|(*(s+1) & 0x3F); ret = 2; } else
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if((*s & 16) == 0 && n > 1) { arg = ((*s & 0xF)<<12)|((*(s+1) & 0x3F)<<6)|(*(s+2) & 0x3F); ret = 3; } else
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if((*s & 8) == 0 && n > 2) { arg = ((*s & 0x7)<<18)|((*(s+1) & 0x3F)<<12)|((*(s+2) & 0x3F)<<6)|(*(s+3) & 0x3F); ret = 4; }
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else return -1;
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}
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if(__pwc) *__pwc = arg;
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return ret;
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}
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int wctomb (char *s, wchar_t u)
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{
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int ret = 0;
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if(u<0x80) {
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*s = u;
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ret = 1;
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} else if(u<0x800) {
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*(s+0)=((u>>6)&0x1F)|0xC0;
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*(s+1)=(u&0x3F)|0x80;
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ret = 2;
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} else {
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*(s+0)=((u>>12)&0x0F)|0xE0;
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*(s+1)=((u>>6)&0x3F)|0x80;
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*(s+2)=(u&0x3F)|0x80;
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ret = 3;
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}
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return ret;
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}
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size_t mbstowcs (wchar_t *__pwcs, const char *__s, size_t __n)
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{
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int r;
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wchar_t *orig = __pwcs;
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if(!__s || !*__s) return 0;
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while(*__s) {
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r = mbtowc(__pwcs, __s, __n - (__pwcs - orig));
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if(r < 0) return (size_t)-1;
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__pwcs++;
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__s += r;
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}
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*__pwcs = 0;
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return __pwcs - orig;
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}
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size_t wcstombs (char *__s, const wchar_t *__pwcs, size_t __n)
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{
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int r;
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char *orig = __s;
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if(!__s || !__pwcs || !*__pwcs) return 0;
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while(*__pwcs && (__s - orig + 4 < __n)) {
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r = wctomb(__s, *__pwcs);
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if(r < 0) return (size_t)-1;
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__pwcs++;
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__s += r;
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}
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*__s = 0;
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return __s - orig;
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}
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void srand(unsigned int __seed)
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{
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__srand_seed = __seed - 1;
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}
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int rand()
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{
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efi_guid_t rngGuid = EFI_RNG_PROTOCOL_GUID;
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efi_rng_protocol_t *rng = NULL;
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efi_status_t status;
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int ret = 0;
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__srand_seed = 6364136223846793005ULL*__srand_seed + 1;
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status = BS->LocateProtocol(&rngGuid, NULL, (void**)&rng);
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if(!EFI_ERROR(status) && rng)
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rng->GetRNG(rng, NULL, (uintn_t)sizeof(int), (uint8_t*)&ret);
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ret ^= (int)(__srand_seed>>33);
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return ret;
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}
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uint8_t *getenv(char_t *name, uintn_t *len)
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{
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efi_guid_t globGuid = EFI_GLOBAL_VARIABLE;
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uint8_t tmp[EFI_MAXIMUM_VARIABLE_SIZE], *ret;
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uint32_t attr;
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efi_status_t status;
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#ifndef UEFI_NO_UTF8
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wchar_t wcname[256];
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mbstowcs((wchar_t*)&wcname, name, 256);
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status = RT->GetVariable((wchar_t*)&wcname, &globGuid, &attr, len, &tmp);
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#else
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status = RT->GetVariable(name, &globGuid, &attr, len, &tmp);
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#endif
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if(EFI_ERROR(status) || *len < 1 || !(ret = malloc((*len) + 1))) {
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*len = 0;
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return NULL;
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}
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memcpy(ret, tmp, *len);
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ret[*len] = 0;
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return ret;
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}
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int setenv(char_t *name, uintn_t len, uint8_t *data)
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{
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efi_guid_t globGuid = EFI_GLOBAL_VARIABLE;
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efi_status_t status;
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#ifndef UEFI_NO_UTF8
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wchar_t wcname[256];
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mbstowcs((wchar_t*)&wcname, name, 256);
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status = RT->SetVariable(wcname, &globGuid, 0, len, data);
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#else
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status = RT->SetVariable(name, &globGuid, 0, len, data);
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#endif
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return !EFI_ERROR(status);
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}
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