60 lines
1.3 KiB
C
60 lines
1.3 KiB
C
#include <fxos.h>
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#include <errors.h>
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#include <util.h>
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#include <string.h>
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/* sys_free_item(): Free a syscall description item */
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static void sys_free_item(void *item)
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{
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struct sys_call *call = item;
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free(call->name);
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free(call->descr);
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}
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/* sys_load(): Load a syscall table */
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void sys_load(char const *file)
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{
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err_context("syscall", file, NULL);
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if(!table_available())
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{
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err("too many tables, skipping");
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err_pop();
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return;
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}
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/* Map the file to memory */
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int fd;
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size_t size;
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void *data = map(file, &fd, &size);
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if(!data) { err_pop(); return; }
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/* If the file is named "sys-x.txt", use "x" as the table name */
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char *name = match_table_name(file, "sys", ".txt");
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/* Parse the contents */
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int count;
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struct sys_call *calls = lex_sys(data, size, &count);
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table_create("sys", name, sys_free_item, count, sizeof *calls, calls);
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unmap(data, fd, size);
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err_pop();
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}
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/* Global storage for the sys_match() function */
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static uint32_t sys_match_number;
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/* sys_match(): Search routine for sys_find() */
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static int sys_match(void *item)
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{
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struct sys_call *call = item;
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return call->number == sys_match_number;
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}
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/* sys_find(): Find information on a given syscall number */
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struct sys_call const *sys_find(uint32_t number)
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{
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sys_match_number = number;
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return table_find("sys", sys_match, NULL, 0);
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}
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