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![bogen85](/assets/img/avatar_default.png)
also split errno from return value in existing Linux syscall wrappers update applicable syscall wrapper checks
57 lines
1.2 KiB
V
57 lines
1.2 KiB
V
module builtin
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//__global buffer [128]byte
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pub fn mm_pages(size u64) u32 {
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pages := (u64(size+u64(4))+u64(linux_mem.page_size))/u64(linux_mem.page_size)
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return u32(pages)
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}
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pub fn mm_alloc(size u64) (byteptr, errno) {
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pages := mm_pages(size)
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n_bytes := u64(pages*u32(linux_mem.page_size))
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mem_prot := mm_prot(int(mm_prot.prot_read) | int(mm_prot.prot_write))
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mem_flags := map_flags(int(map_flags.map_private) | int(map_flags.map_anonymous))
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//mps := i64_tos(buffer,80,i64(mem_prot),16)
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//println(mps)
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//mfs := i64_tos(buffer,80,i64(mem_flags),16)
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//println(mfs)
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//print("pages in: ")
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//ps := i64_tos(buffer,80,i64(pages),16)
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//println(ps)
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a, e := sys_mmap(0, n_bytes, mem_prot, mem_flags, -1, 0)
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if e == .enoerror {
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mut ap := intptr(a)
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*ap = pages
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return byteptr(a+4), e
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}
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return byteptr(0), e
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}
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pub fn mm_free(addr byteptr) errno {
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ap := intptr(addr-4)
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size := u64(*ap) * u64(linux_mem.page_size)
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//aps := i64_tos(buffer,80,i64(addr),16)
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//println(aps)
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//ss := i64_tos(buffer,80,i64(size),16)
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//print("size out: ")
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//println(ss)
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//pas := i64_tos(buffer,80,i64(ap),16)
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//println(pas)
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e := sys_munmap(ap, size)
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//es := i64_tos(buffer,80,i64(e),16)
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//println(es)
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return e
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}
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