move mips stack

risc/run.py

@@ -25,6 +25,7 @@ regs = ["at", "v0", "v1", "a0", "a1", "a2", "a3"]
 
 SIZE = 16*1024*1024
 
+
 heap_start = 0x20000000 # 0x20000000-0x30000000
 # input oracle              @ 0x30000000
 # output oracle             @ 0x30000800
@@ -32,6 +33,7 @@ heap_start = 0x20000000 # 0x20000000-0x30000000
 # preimage oracle (read)    @ 0x31000000-0x32000000 (16 MB)
 
 brk_start = 0x40000000  # 0x40000000-0x80000000
+stack_start = 0x7FFFF000
 
 # hmm, very slow
 icount = 0
@@ -305,26 +307,16 @@ entry = elffile.header.e_entry
 print("entrypoint: %x" % entry)
 #hexdump(mu.mem_read(entry, 0x10))
 
-mu.reg_write(UC_MIPS_REG_SP, SIZE-0x2000)
+mu.reg_write(UC_MIPS_REG_SP, stack_start-0x2000)
 
 # http://articles.manugarg.com/aboutelfauxiliaryvectors.html
 _AT_PAGESZ = 6
-mu.mem_write(SIZE-0x2000, struct.pack(">IIIIIIII",
+mu.mem_write(stack_start-0x2000, struct.pack(">IIIIIIII",
   1,  # argc
-  SIZE-0x1000, 0,  # argv
-  SIZE-0x400, 0,  # envp
+  stack_start-0x1000, 0,  # argv
+  stack_start-0x400, 0,  # envp
   _AT_PAGESZ, 0x1000, 0)) # auxv
-
-# block
-#mu.mem_write(SIZE-0x800, b"13284469\x00")
-#mu.mem_write(SIZE-0x800, b"13284469\x00")
-
-mu.mem_write(SIZE-0x400, b"GOGC=off\x00")
-
-#hexdump(mu.mem_read(SIZE-0x2000, 0x100))
-
-# nop osinit
-#mu.mem_write(0x44524, b"\x03\xe0\x00\x08\x00\x00\x00\x00")
+mu.mem_write(stack_start-0x400, b"GOGC=off\x00")
 
 r = RangeTree()
 for section in elffile.iter_sections():