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| author | Kartik Agaram <vc@akkartik.com> | 2019-05-11 00:30:31 -0700 |
|---|---|---|
| committer | Kartik Agaram <vc@akkartik.com> | 2019-05-11 00:30:31 -0700 |
| commit | 36c745f8e0cb24b781a5cb6bb7e829937dabec46 (patch) | |
| tree | 8142f7ccf3ba62c5e16cfaacf6248ce95c1e69c8 /subx/012elf.cc | |
| parent | 1ebb7614921a2b426ed84c4c51b100176e2a4187 (diff) | |
| download | mu-36c745f8e0cb24b781a5cb6bb7e829937dabec46.tar.gz | |
5152 - check for stack underflow/overflow in VM
Diffstat (limited to 'subx/012elf.cc')
| -rw-r--r-- | subx/012elf.cc | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/subx/012elf.cc b/subx/012elf.cc index d0a3fbd2..a77c6056 100644 --- a/subx/012elf.cc +++ b/subx/012elf.cc @@ -90,6 +90,7 @@ void load_elf_contents(uint8_t* elf_contents, size_t size, int argc, char* argv[ void push(uint32_t val) { Reg[ESP].u -= 4; + assert(Reg[ESP].u >= STACK_SEGMENT); trace(Callstack_depth+1, "run") << "decrementing ESP to 0x" << HEXWORD << Reg[ESP].u << end(); trace(Callstack_depth+1, "run") << "pushing value 0x" << HEXWORD << val << end(); write_mem_u32(Reg[ESP].u, val); |