139 lines
3.9 KiB
C++
139 lines
3.9 KiB
C++
/*
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* Copyright (c) 2012, 2015, 2022 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* kernelinfo.cpp
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* Lets user-space query information about the kernel.
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*/
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#include <brand.h>
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#include <errno.h>
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#include <sortix/kernel/copy.h>
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#include <sortix/kernel/kernel.h>
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#include <sortix/kernel/syscall.h>
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#include "net/tcp.h"
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#ifndef VERSIONSTR
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#define VERSIONSTR "unknown"
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#endif
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namespace Sortix {
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static const char* KernelInfo(const char* req)
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{
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if ( strcmp(req, "name") == 0 ) { return BRAND_KERNEL_NAME; }
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if ( strcmp(req, "version") == 0 ) { return VERSIONSTR; }
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if ( strcmp(req, "tagline") == 0 ) { return BRAND_RELEASE_TAGLINE; }
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if ( strcmp(req, "builddate") == 0 ) { return __DATE__; }
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if ( strcmp(req, "buildtime") == 0 ) { return __TIME__; }
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#if defined(__i386__) || defined(__x86_64__)
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if ( strcmp(req, "firmware") == 0 ) { return "bios"; }
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#else
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#warning "Name your system firmware here"
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#endif
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return NULL;
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}
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ssize_t sys_kernelinfo(const char* user_req, char* user_resp, size_t resplen)
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{
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char* req = GetStringFromUser(user_req);
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if ( !req )
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return -1;
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// DEBUG
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if ( !strcmp(req, "virtual-usage") )
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{
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delete[] req;
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size_t heap;
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size_t aux;
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size_t leaked;
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size_t total;
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KernelAddressStatistics(&heap, &aux, &leaked, &total);
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char str[4 * (20 + 3 * sizeof(size_t) + 1 + 8)];
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snprintf(str, sizeof(str),
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"%20zu B heap\n%20zu B aux\n%20zu B leaked\n%20zu B total",
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heap, aux, leaked, total);
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size_t stringlen = strlen(str);
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if ( resplen < stringlen + 1 )
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return errno = ERANGE, (ssize_t) stringlen;
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if ( !CopyToUser(user_resp, str, sizeof(char) * (stringlen + 1)) )
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return -1;
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return 0;
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}
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// DEBUG
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if ( !strcmp(req, "tcp") )
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{
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delete[] req;
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return TCP::Info(user_resp, resplen);
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}
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#ifdef __TRACE_ALLOCATION_SITES
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if ( !strcmp(req, "allocations") )
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{
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delete[] req;
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bool exhausted = false;
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size_t total_needed = 0;
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for ( struct kernel_allocation_site* site = first_kernel_allocation_site;
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site;
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site = site->next )
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{
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char str[256];
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snprintf(str, sizeof(str), "%20zu B %zu allocations %s:%zu %s %c",
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site->allocation_site.current_size,
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site->allocation_site.allocations,
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site->allocation_site.file,
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site->allocation_site.line,
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site->allocation_site.function,
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site->next ? '\n' : '\0');
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size_t stringlen = strlen(str);
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total_needed += stringlen;
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if ( exhausted )
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continue;
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if ( resplen < stringlen )
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{
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exhausted = true;
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continue;
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}
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if ( !CopyToUser(user_resp, str, sizeof(char) * stringlen) )
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return -1;
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user_resp += stringlen;
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resplen -= stringlen;
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}
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if ( !exhausted && !resplen )
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exhausted = true;
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if ( !exhausted )
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{
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char zero = '\0';
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if ( !CopyToUser(user_resp, &zero, 1) )
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return -1;
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}
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if ( exhausted )
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return errno = ERANGE, (ssize_t) total_needed;
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return 0;
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}
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#endif
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const char* str = KernelInfo(req);
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delete[] req;
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if ( !str )
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return errno = EINVAL, -1;
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size_t stringlen = strlen(str);
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if ( resplen < stringlen + 1 )
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return errno = ERANGE, (ssize_t) stringlen;
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if ( !CopyToUser(user_resp, str, sizeof(char) * (stringlen + 1)) )
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return -1;
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return 0;
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}
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} // namespace Sortix
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