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Start working on memory-mapped files.

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First of all, change sys$mmap to take a struct SC_mmap_params since our
sycsall calling convention can't handle more than 3 arguments.

This exposed a bug in Syscall::invoke() needing to use clobber lists.
It was a bit confusing to debug. :^)
This commit is contained in:
Andreas Kling
2018-11-08 11:37:01 +01:00
parent 41a751c90c
commit fdbd9f1e27
14 changed files with 82 additions and 26 deletions
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2
LibC/stdlib.cpp
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@@ -18,7 +18,7 @@ static byte* endptr = nullptr;
void __malloc_init()
{
nextptr = (byte*)mmap(nullptr, mallocBudget);
nextptr = (byte*)mmap(nullptr, mallocBudget, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, 0, 0);
endptr = nextptr + mallocBudget;
int rc = set_mmap_name(nextptr, mallocBudget, "malloc");
if (rc < 0)