Files
mango/arch/x86_64/asm-offset.c
2026-03-12 20:34:31 +00:00

32 lines
916 B
C

#include <kernel/compiler.h>
#include <kernel/sched.h>
#include <kernel/thread.h>
// size_t THREAD_sp = offsetof(struct thread, tr_sp);
/* Use %a0 instead of %0 to prevent gcc from emitting a $ before the symbol
value in the generated assembly.
emitting
.set TASK_sp, $56
instead of
.set TASK_sp, 56
causes garbage symbols to be generated.
*/
#define DEFINE(sym, val) \
asm volatile("\n.global " #sym "\n.type " #sym \
", @object" \
"\n.set " #sym ", %a0" \
: \
: "i"(val))
#define OFFSET(sym, str, mem) DEFINE(sym, offsetof(str, mem))
static void __used common(void)
{
OFFSET(THREAD_sp, struct thread, tr_sp);
}