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kernel: do preparation work for copyless read/write

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Matheus
2024-09-18 21:17:37 -03:00
parent 1140244816
commit 611f13b562
12 changed files with 134 additions and 47 deletions
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kernel-src/io/fb.c
+8 -2
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@@ -99,7 +99,10 @@ static int read(int minor, void *buffer, size_t size, uintmax_t offset, int flag
if(size + offset > end)
size = end - offset;
memcpy(buffer, (void *)((uintptr_t)fbs[minor]->address + offset), size);
int error = USERCOPY_POSSIBLY_TO_USER(buffer, (void *)((uintptr_t)fbs[minor]->address + offset), size);
if (error)
return error;
*readc = size;
return 0;
@@ -118,7 +121,10 @@ static int write(int minor, void *buffer, size_t size, uintmax_t offset, int fla
if(size + offset > end)
size = end - offset;
memcpy((void *)((uintptr_t)fbs[minor]->address + offset), buffer, size);
int error = USERCOPY_POSSIBLY_FROM_USER((void *)((uintptr_t)fbs[minor]->address + offset), buffer, size);
if (error)
return error;
*writec = size;
return 0;