54 lines
1.4 KiB
C
54 lines
1.4 KiB
C
#include <zinnia/compiler.h>
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#include <zinnia/errno.h>
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#include <zinnia/print.h>
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#include <zinnia/sched.h>
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#include <zinnia/syscall.h>
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#include <zinnia/types.h>
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#include <zinnia/utils.h>
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#include <bits/sched.h>
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// Declare all syscalls.
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#include <zinnia/syscall_list.inc>
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#undef SYSCALL_DECLARE
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// Define them.
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const struct syscall syscall_table[256] = {
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#define SYSCALL_DECLARE(number, name, num_args) [number] = {sys_##name, num_args},
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#include <zinnia/syscall_list.inc>
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};
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// TODO: Implement this
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[[gnu::no_caller_saved_registers]]
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struct syscall_ret syscall_dispatch_fast(
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uintptr_t a0,
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uintptr_t a1,
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uintptr_t a2,
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uintptr_t a3,
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uintptr_t a4,
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uintptr_t a5,
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size_t num
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) {
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// No need to check the table size here. In order to get to this point,
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// we already have to check if this is a fast syscall.
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if (syscall_table[num].func == nullptr) {
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return (struct syscall_ret){.errno = ENOSYS};
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}
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struct syscall_ret (*func)(uintptr_t, uintptr_t, uintptr_t, uintptr_t, uintptr_t, uintptr_t) =
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syscall_table[num].func;
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return func(a0, a1, a2, a3, a4, a5);
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}
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void syscall_dispatch(struct arch_context* ctx) {
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const size_t num = ctx->ARCH_CTX_NUM;
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if (num >= ARRAY_SIZE(syscall_table) || syscall_table[num].func == nullptr) {
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ctx->ARCH_CTX_RET0 = ENOSYS;
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return;
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}
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void (*func)(struct arch_context* ctx) = syscall_table[num].func;
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func(ctx);
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}
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