mirror of
https://source.denx.de/u-boot/u-boot.git
synced 2025-08-14 19:26:58 +02:00
a27844cc94
Add initjm[() to sandbox, a non-standard extension to setjmp()/ longjmp() allowing to initialize a jump buffer with a function pointer and a stack pointer. This will be useful to later introduce threads. With this new function it becomes possible to longjmp() to a particular function pointer (rather than to a point previously reached during program execution as is the case with setjmp()), and with a custom stack. Both things are needed to spin off a new thread. Then the usual setjmp()/longjmp() pair is enough to save and restore a context, i.e., switch thread. The implementation is taken verbatim from barebox [1] with the exception of the additional stack_sz argument. It is quite complex because contrary to U-Boot platform code we don't know how the system's C library implements the jump buffer, so we can't just write the function and stack pointers into it. [1] https://github.com/barebox/barebox/blob/b2a15c383ddc/arch/sandbox/os/setjmp.c Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org> |
||
|---|---|---|
| .. | ||
| cache.c | ||
| cpu.c | ||
| eth-raw-os.c | ||
| initjmp.c | ||
| Makefile | ||
| os.c | ||
| sdl.c | ||
| spl.c | ||
| start.c | ||
| state.c | ||
| u-boot-spl.lds | ||
| u-boot.lds | ||