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Kernel: Pass 'prot' argument to File::mmap() and act on it.

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Nothing crazy, this just means that PROT_READ allocates readable regions,
and that PROT_WRITE allocates writable ones.
This commit is contained in:
Andreas Kling 2019-05-30 12:38:35 +02:00
parent 004a630bfe
commit 66c1a9be3b
7 changed files with 11 additions and 9 deletions
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6
Kernel/Devices/BXVGADevice.cpp
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@ -84,7 +84,7 @@ dword BXVGADevice::find_framebuffer_address()
return framebuffer_address;
}
KResultOr<Region*> BXVGADevice::mmap(Process& process, LinearAddress preferred_laddr, size_t offset, size_t size)
KResultOr<Region*> BXVGADevice::mmap(Process& process, LinearAddress preferred_laddr, size_t offset, size_t size, int prot)
{
ASSERT(offset == 0);
ASSERT(size == framebuffer_size_in_bytes());
@ -95,7 +95,9 @@ KResultOr<Region*> BXVGADevice::mmap(Process& process, LinearAddress preferred_l
move(vmo),
0,
"BXVGA Framebuffer",
true, true);
prot & PROT_READ,
prot & PROT_WRITE
);
kprintf("BXVGA: %s(%u) created Region{%p} with size %u for framebuffer P%x with laddr L%x\n",
process.name().characters(), process.pid(),
region, region->size(), framebuffer_address().as_ptr(), region->laddr().get());

2
Kernel/Devices/BXVGADevice.h
View file

@ -18,7 +18,7 @@ public:
void set_y_offset(int);
virtual int ioctl(FileDescriptor&, unsigned request, unsigned arg) override;
virtual KResultOr<Region*> mmap(Process&, LinearAddress preferred_laddr, size_t offset, size_t) override;
virtual KResultOr<Region*> mmap(Process&, LinearAddress preferred_laddr, size_t offset, size_t, int prot) override;
size_t framebuffer_size_in_bytes() const { return m_framebuffer_size.area() * sizeof(dword) * 2; }
Size framebuffer_size() const { return m_framebuffer_size; }