linux loader: split 1gb/3gb payloads

Note: the submodule points to the 7.02 branch of ps4-kexec. To build Linux payload for 6.72, switch the branches manually.

linux/Makefile

@@ -1,7 +1,7 @@
-all: payload.bin payload-702.bin
+all: payload.bin payload-702.bin payload-3gb.bin payload-702-3gb.bin
 
 clean:
-	rm payload.elf payload.bin
+	rm -f payload.elf payload.bin payload-702.elf payload-702.bin payload-3gb.elf payload-3gb.bin payload-702-3gb.elf payload-702-3gb.bin
 
 ../lib/lib.a:
 	cd ../lib; make
@@ -20,5 +20,19 @@ payload-702.bin: payload-702.elf
 	objcopy payload-702.elf --only-section .text --only-section .data --only-section .bss --only-section .rodata -O binary payload-702.bin
 	file payload-702.bin | fgrep -q 'payload-702.bin: DOS executable (COM)'
 
+payload-3gb.elf: ../lib/lib.a main.c ps4-kexec/kexec.bin
+	gcc -isystem ../../8cc/freebsd-headers -nostdinc -nostdlib -static ../lib/lib.a -DVRAM_GB=3 main.c -Wl,-gc-sections -o payload-3gb.elf
+
+payload-3gb.bin: payload-3gb.elf
+	objcopy payload-3gb.elf --only-section .text --only-section .data --only-section .bss --only-section .rodata -O binary payload-3gb.bin
+	file payload-3gb.bin | fgrep -q 'payload-3gb.bin: DOS executable (COM)'
+
+payload-702-3gb.elf: ../lib/lib.a main.c ps4-kexec/kexec.bin
+	gcc -isystem ../../8cc/freebsd-headers -nostdinc -nostdlib -static ../lib/lib.a -D__7_02__ -DVRAM_GB=3 main.c -Wl,-gc-sections -o payload-702-3gb.elf
+
+payload-702-3gb.bin: payload-702-3gb.elf
+	objcopy payload-702-3gb.elf --only-section .text --only-section .data --only-section .bss --only-section .rodata -O binary payload-702-3gb.bin
+	file payload-702-3gb.bin | fgrep -q 'payload-702-3gb.bin: DOS executable (COM)'
+
 ps4-kexec/kexec.bin:
 	cd ps4-kexec; make

linux/main.c

@@ -48,7 +48,7 @@ void kernel_main()
 
 asm("kexec_load:\nmov %rcx, %r10\nmov $153, %rax\nsyscall\nret");
 
-int kexec_load(char* kernel, unsigned long long kernel_size, char* initrd, unsigned long long initrd_size, char* cmdline);
+int kexec_load(char* kernel, unsigned long long kernel_size, char* initrd, unsigned long long initrd_size, char* cmdline, int vram_gb);
 
 int read_file(char* path, char** ptr, unsigned long long* sz)
 {
@@ -99,6 +99,10 @@ void alert(const char* msg)
     sceSysUtilSendSystemNotificationWithText(222, msg);
 }
 
+#ifndef VRAM_GB
+#define VRAM_GB 1
+#endif
+
 int main()
 {
     struct sigaction sa = {
@@ -141,6 +145,6 @@ int main()
         .rtp = NULL
     };
     thr_new(&thr, sizeof(thr));
-    kexec_load(kernel, kernel_size, initrd, initrd_size, cmdline);
+    kexec_load(kernel, kernel_size, initrd, initrd_size, cmdline, VRAM_GB);
     for(;;);
 }