Add permanent_uart. (LightningMods#9)

permanent_uart/Makefile

@@ -0,0 +1,37 @@
+LIBPS4	:= $(PS4SDK)/libPS4
+
+CC	:= gcc
+OBJCOPY	:= objcopy
+ODIR	:= build
+SDIR	:= source
+IDIRS	:= -I$(LIBPS4)/include -Iinclude
+LDIRS	:= -L$(LIBPS4)
+MAPFILE := $(shell basename "$(CURDIR)").map
+CFLAGS	:= $(IDIRS) -Os -std=c11 -ffunction-sections -fdata-sections -fno-builtin -nostartfiles -nostdlib -Wall -Wextra -masm=intel -march=btver2 -mtune=btver2 -m64 -mabi=sysv -mcmodel=small -fpie -fPIC
+LFLAGS	:= $(LDIRS) -Xlinker -T $(LIBPS4)/linker.x -Xlinker -Map="$(MAPFILE)" -Wl,--build-id=none -Wl,--gc-sections
+CFILES	:= $(wildcard $(SDIR)/*.c)
+SFILES	:= $(wildcard $(SDIR)/*.s)
+OBJS	:= $(patsubst $(SDIR)/%.c, $(ODIR)/%.o, $(CFILES)) $(patsubst $(SDIR)/%.s, $(ODIR)/%.o, $(SFILES))
+
+LIBS	:= -lPS4
+
+TARGET = $(shell basename "$(CURDIR)").bin
+
+$(TARGET): $(ODIR) $(OBJS)
+	$(CC) $(LIBPS4)/crt0.s $(ODIR)/*.o -o temp.t $(CFLAGS) $(LFLAGS) $(LIBS)
+	$(OBJCOPY) -O binary temp.t "$(TARGET)"
+	rm -f temp.t
+
+$(ODIR)/%.o: $(SDIR)/%.c
+	$(CC) -c -o $@ $< $(CFLAGS)
+
+$(ODIR)/%.o: $(SDIR)/%.s
+	$(CC) -c -o $@ $< $(CFLAGS)
+
+$(ODIR):
+	@mkdir $@
+
+.PHONY: clean
+
+clean:
+	rm -rf "$(TARGET)" "$(MAPFILE)" $(ODIR)

permanent_uart/source/main.c

@@ -0,0 +1,99 @@
+#include <ps4.h>
+
+// #define DEBUG_SOCKET
+// #define DEBUG_IP "192.168.1.200"
+// #define DEBUG_PORT 9023
+
+static int (*sceKernelDebugOutText)(int,
+                                    const char *) = NULL;
+// size_t page_size = 0x4000;
+
+void *kernel_base = NULL;
+uint16_t fw_version = -1;
+
+#define icc_nvs_write_macro_alt(x) \
+  icc_nvs_write = (void *)(kernel_base + K##x##_ICC_NVS_WRITE);
+
+int kpayload_perm_uart_alt() {
+  uint64_t (*icc_nvs_write)(uint32_t block, uint32_t offset, uint32_t size, void *value);
+
+  // NOTE: This is a C preprocessor macro
+  build_kpayload(fw_version, icc_nvs_write_macro_alt);
+
+  char uart = 1;
+  icc_nvs_write(4, 0x31F, 1, &uart);
+
+  return 0;
+}
+
+int kpayload(struct thread *td) {
+  kernel_base = &((uint8_t *)__readmsr(0xC0000082))[-0x1C0];
+
+  struct ucred *cred = td->td_proc->p_ucred;
+  cred->cr_uid = 0;
+  cred->cr_ruid = 0;
+  cred->cr_rgid = 0;
+  cred->cr_groups[0] = 0;
+
+  // escalate ucred privs, needed for access to the filesystem ie* mounting & decrypting files
+  void *td_ucred = *(void **)(((char *)td) + 304); // p_ucred == td_ucred
+
+  // sceSblACMgrIsSystemUcred
+  uint64_t *sonyCred = (uint64_t *)(((char *)td_ucred) + 96);
+  *sonyCred = 0xffffffffffffffff;
+
+  // sceSblACMgrGetDeviceAccessType
+  uint64_t *sceProcType = (uint64_t *)(((char *)td_ucred) + 88);
+  *sceProcType = 0x3801000000000013; // Max access
+
+  // sceSblACMgrHasSceProcessCapability
+  uint64_t *sceProcCap = (uint64_t *)(((char *)td_ucred) + 104);
+  *sceProcCap = 0xffffffffffffffff; // Sce Process
+
+  return 0;
+}
+
+int _main(struct thread *td) {
+  UNUSED(td);
+
+  // Initialize PS4 Kernel, libc, and networking
+  initKernel();
+  initLibc();
+  initSysUtil();
+
+  // Load and resolve libkernel_sys library
+  int libk = sceKernelLoadStartModule("libkernel_sys.sprx", 0, NULL, 0, 0, 0);
+  RESOLVE(libk, sceKernelDebugOutText);
+
+  sceKernelSleep(1);
+
+  // Output initialization messages
+  if (sceKernelDebugOutText) {
+    sceKernelDebugOutText(0, "==========================\n");
+    sceKernelDebugOutText(0, "Hello From inside Shellcore!!!\n");
+    sceKernelDebugOutText(0, "==========================\n");
+  }
+
+#ifdef DEBUG_SOCKET
+  initNetwork();
+  DEBUG_SOCK = SckConnect(DEBUG_IP, DEBUG_PORT);
+#endif
+
+  // jailbreak();
+  syscall(11, &kpayload, NULL);
+
+  // sceKernelDebugOutText(0, "called enable_perm_uart()\n");
+  // enable_perm_uart();
+
+  fw_version = get_firmware();
+  syscall(11, &kpayload_perm_uart_alt, NULL);
+
+  printf_notification("Enabled UART!");
+
+#ifdef DEBUG_SOCKET
+  printf_debug("Closing socket...\n");
+  SckClose(DEBUG_SOCK);
+#endif
+
+  return 0;
+}