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Make yield a regular syscall taking an argument.

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Allows "wait for interrupt"/"wait for event" type operation where VM code blocks until the host has something for it.
This commit is contained in:
Toby Jaffey 2025-12-10 10:35:18 +00:00
parent d52baca7b2
commit e07eeab043
14 changed files with 88 additions and 24 deletions
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2
common/uvm32_target.h
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@ -56,7 +56,7 @@ static uint32_t syscall(uint32_t id, uint32_t param1, uint32_t param2) {
#define millis() syscall_cast(UVM32_SYSCALL_MILLIS, 0, 0)
#define putc(x) syscall_cast(UVM32_SYSCALL_PUTC, x, 0)
#define getc() syscall_cast(UVM32_SYSCALL_GETC, 0, 0)
#define yield() syscall_cast(UVM32_SYSCALL_YIELD, 0, 0)
#define yield(x) syscall_cast(UVM32_SYSCALL_YIELD, x, 0)
#define printbuf(x, y) syscall_cast(UVM32_SYSCALL_PRINTBUF, x, y)
extern char _estack;