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[PROCESS] Add functionality for process_yield() syscall #57

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[PROCESS] Add functionality for process_yield() syscall #57

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6874ac7
[PROCESS] Add functionality for process_yield() syscall
1rjs Oct 19, 2025
881a583
Merge branch 'differrari:sound/wav' into sound/wav
1rjs Oct 21, 2025
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9 changes: 8 additions & 1 deletion kernel/process/syscall.c
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Original file line number Diff line number Diff line change
Expand Up @@ -103,6 +103,12 @@ uint64_t syscall_sleep(process_t *ctx){
return 0;
}

uint64_t syscall_yield(process_t *ctx){
syscall_depth--;
switch_proc(YIELD);
return 0;
}

uint64_t syscall_halt(process_t *ctx){
kprintf("Process has ended with code %i",ctx->PROC_X0);
syscall_depth--;
Expand Down Expand Up @@ -186,7 +192,7 @@ uint64_t syscall_fopen(process_t *ctx){
char path[255];
if (!(ctx->PROC_PRIV) && strstart("/resources/", req_path, true) == 11){
string_format_buf(path, sizeof(path),"%s%s", ctx->bundle, req_path);
} else memcpy(path, req_path, strlen(req_path, 0));
} else memcpy(path, req_path, strlen(req_path, 0) + 1);
//TODO: Restrict access to own bundle, own fs and require privilege escalation for full-ish filesystem access
file *descriptor = (file*)ctx->PROC_X1;
return open_file(path, descriptor);
Expand Down Expand Up @@ -232,6 +238,7 @@ syscall_entry syscalls[] = {
[GPU_CHAR_SIZE_CODE] = syscall_char_size,
[RESIZE_DRAW_CTX_CODE] = syscall_gpu_resize_ctx,
[SLEEP_CODE] = syscall_sleep,
[PROCESS_YIELD_CODE] = syscall_yield,
[HALT_CODE] = syscall_halt,
[EXEC_CODE] = syscall_exec,
[GET_TIME_CODE] = syscall_get_time,
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1 change: 1 addition & 0 deletions shared/syscalls/syscalls.h
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Expand Up @@ -25,6 +25,7 @@ extern bool read_event(kbd_event *event);
extern void get_mouse_status(mouse_input *in);

extern void sleep(uint64_t time);
extern void process_yield();
extern void halt(uint32_t exit_code);
extern uint16_t exec(const char* prog_name, int argc, const char* argv[]);

Expand Down