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| author | Kartik Agaram <vc@akkartik.com> | 2018-09-29 12:25:28 -0700 |
|---|---|---|
| committer | Kartik Agaram <vc@akkartik.com> | 2018-09-29 17:45:00 -0700 |
| commit | ed79099bf6ad783e4ce040d1e611a9f4ca068d2c (patch) | |
| tree | fb34b81f62526d6c61fc0a85c7e80e43ae3bc6f9 /subx/010---vm.cc | |
| parent | ef79039287b7a76f4fcb0628a6295582d8caf768 (diff) | |
| download | mu-ed79099bf6ad783e4ce040d1e611a9f4ca068d2c.tar.gz | |
4617
Diffstat (limited to 'subx/010---vm.cc')
| -rw-r--r-- | subx/010---vm.cc | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/subx/010---vm.cc b/subx/010---vm.cc index c862ed99..388fb12b 100644 --- a/subx/010---vm.cc +++ b/subx/010---vm.cc @@ -94,8 +94,8 @@ const uint32_t INITIAL_SEGMENT_SIZE = 0x1000 - 1; // Subtract one just so we can start the first segment at address 1 without // overflowing the first segment. Other segments will learn to adjust. -// Like in real-world Linux, we'll allocate RAM for our programs in slabs -// called VMAs or Virtual Memory Areas. +// Like in real-world Linux, we'll allocate RAM for our programs in disjoint +// slabs called VMAs or Virtual Memory Areas. struct vma { uint32_t start; // inclusive uint32_t end; // exclusive @@ -126,6 +126,9 @@ struct vma { :(before "End Globals") // RAM is made of VMAs. +// +// We currently have zero tests for overlapping VMAs. Particularly after +// growing segments. vector<vma> Mem; :(code) // The first 3 VMAs are special. When loading ELF binaries in later layers, |