added simple kern(el) example elf - try libless (e.g. stress) too

Author: hitodama

kern/print/Makefile

@@ -0,0 +1,16 @@
+ifndef Ps4Sdk
+ifdef ps4sdk
+Ps4Sdk := $(ps4sdk)
+endif
+ifdef PS4SDK
+Ps4Sdk := $(PS4SDK)
+endif
+ifndef Ps4Sdk
+$(error Neither PS4SDK, Ps4Sdk nor ps4sdk set)
+endif
+endif
+
+target ?= ps4_elf
+Cf := -Wno-zero-length-array #sysproto.h
+
+include $(Ps4Sdk)/make/ps4sdk.mk

kern/print/source/main.c

@@ -0,0 +1,78 @@
+#define _XOPEN_SOURCE 700
+#define __BSD_VISIBLE 1
+#define _KERNEL
+#define _WANT_UCRED
+#include <sys/cdefs.h>
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/kernel.h>
+#include <sys/systm.h>
+#include <sys/malloc.h>
+#include <sys/sysproto.h>
+
+#include <machine/specialreg.h>
+
+#undef offsetof
+#include <ps4/kernel.h>
+#include <ps4/kern.h>
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/sysproto.h>
+#include <sys/filedesc.h>
+#include <sys/filio.h>
+#include <sys/fcntl.h>
+#include <sys/lock.h>
+#include <sys/proc.h>
+#include <sys/signalvar.h>
+#include <sys/uio.h>
+#include <sys/kernel.h>
+#include <sys/ktr.h>
+#include <sys/limits.h>
+#include <sys/malloc.h>
+#include <sys/poll.h>
+#include <sys/resourcevar.h>
+#include <sys/selinfo.h>
+#include <sys/sysctl.h>
+#include <sys/sysent.h>
+#include <sys/condvar.h>
+#ifdef KTRACE
+#include <sys/ktrace.h>
+#endif
+
+extern int kern_writev(struct thread *td, int fd, struct uio *auio);
+
+int kern_sys_write(struct thread *td, struct write_args *uap)
+{
+	struct uio auio;
+	struct iovec aiov;
+	int error;
+
+	if (uap->nbyte > INT_MAX)
+		return (EINVAL);
+
+	aiov.iov_base = (void *)(uintptr_t)uap->buf;
+	aiov.iov_len = uap->nbyte;
+	auio.uio_iov = &aiov;
+	auio.uio_iovcnt = 1;
+	auio.uio_resid = uap->nbyte;
+	auio.uio_segflg = UIO_SYSSPACE;
+	error = kern_writev(td, uap->fd, &auio);
+
+	return(error);
+}
+
+int main(int argc, char **argv)
+{
+	void *memory = ps4KernMemoryMalloc(1234);
+	struct write_args wargs; //Die monster! You don't belong in this world!
+
+	sprintf(memory, "sys_write: %p, memory: %p\n", (void *)sys_write, (void *)memory);
+	wargs.fd = 1;
+	wargs.buf = memory;
+	wargs.nbyte = strnlen(memory, 1234);
+	int r = kern_sys_write(ps4KernThreadCurrent(), &wargs);
+	ps4KernMemoryFree(memory);
+
+	return EXIT_SUCCESS;
+}