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Kernel: Remove unused syscall sys$minherit()

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This is no longer used. We can bring it back the day we need it.
This commit is contained in:
Andreas Kling 2021-01-16 14:41:58 +01:00
parent de31e82f97
commit 43109f9614
Notes: sideshowbarker 2024-07-18 23:11:09 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/43109f9614d
8 changed files with 0 additions and 60 deletions
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1
Kernel/API/Syscall.h
View File

@ -186,7 +186,6 @@ namespace Kernel {
S(shutdown) \
S(get_stack_bounds) \
S(ptrace) \
S(minherit) \
S(sendfd) \
S(recvfd) \
S(sysconf) \

1
Kernel/Process.h
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@ -259,7 +259,6 @@ public:
int sys$set_mmap_name(Userspace<const Syscall::SC_set_mmap_name_params*>);
int sys$mprotect(void*, size_t, int prot);
int sys$madvise(void*, size_t, int advice);
int sys$minherit(void*, size_t, int inherit);
int sys$purge(int mode);
int sys$select(const Syscall::SC_select_params*);
int sys$poll(Userspace<const Syscall::SC_poll_params*>);

26
Kernel/Syscalls/mmap.cpp
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@ -306,32 +306,6 @@ int Process::sys$madvise(void* address, size_t size, int advice)
return -EINVAL;
}
int Process::sys$minherit(void* address, size_t size, int inherit)
{
REQUIRE_PROMISE(stdio);
auto* region = find_region_from_range({ VirtualAddress(address), size });
if (!region)
return -EINVAL;
if (!region->is_mmap())
return -EINVAL;
if (region->is_shared())
return -EINVAL;
if (!region->vmobject().is_anonymous())
return -EINVAL;
switch (inherit) {
case MAP_INHERIT_ZERO:
region->set_inherit_mode(Region::InheritMode::ZeroedOnFork);
return 0;
}
return -EINVAL;
}
int Process::sys$set_mmap_name(Userspace<const Syscall::SC_set_mmap_name_params*> user_params)
{
REQUIRE_PROMISE(stdio);

2
Kernel/UnixTypes.h
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@ -104,8 +104,6 @@ enum {
#define MADV_SET_NONVOLATILE 0x200
#define MADV_GET_VOLATILE 0x400
#define MAP_INHERIT_ZERO 1
#define F_DUPFD 0
#define F_GETFD 1
#define F_SETFD 2

13
Kernel/VM/Region.cpp
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@ -93,19 +93,6 @@ OwnPtr<Region> Region::clone(Process& new_owner)
ASSERT(Process::current());
ScopedSpinLock lock(s_mm_lock);
if (m_inherit_mode == InheritMode::ZeroedOnFork) {
ASSERT(m_mmap);
ASSERT(!m_shared);
ASSERT(vmobject().is_anonymous());
auto new_vmobject = AnonymousVMObject::create_with_size(size(), AllocationStrategy::Reserve); // TODO: inherit committed non-volatile areas?
if (!new_vmobject)
return {};
auto zeroed_region = Region::create_user_accessible(&new_owner, m_range, new_vmobject.release_nonnull(), 0, m_name, m_access);
zeroed_region->copy_purgeable_page_ranges(*this);
zeroed_region->set_mmap(m_mmap);
zeroed_region->set_inherit_mode(m_inherit_mode);
return zeroed_region;
}
if (m_shared) {
ASSERT(!m_stack);

8
Kernel/VM/Region.h
View File

@ -56,11 +56,6 @@ public:
Execute = 4,
};
enum class InheritMode {
Default,
ZeroedOnFork,
};
static NonnullOwnPtr<Region> create_user_accessible(Process*, const Range&, NonnullRefPtr<VMObject>, size_t offset_in_vmobject, const StringView& name, u8 access, bool cacheable = true, bool shared = false);
static NonnullOwnPtr<Region> create_kernel_only(const Range&, NonnullRefPtr<VMObject>, size_t offset_in_vmobject, const StringView& name, u8 access, bool cacheable = true);
@ -227,8 +222,6 @@ public:
// NOTE: These are public so we can make<> them.
Region(const Range&, NonnullRefPtr<VMObject>, size_t offset_in_vmobject, const String&, u8 access, bool cacheable, bool kernel, bool shared);
void set_inherit_mode(InheritMode inherit_mode) { m_inherit_mode = inherit_mode; }
bool remap_vmobject_page_range(size_t page_index, size_t page_count);
bool is_volatile(VirtualAddress vaddr, size_t size) const;
@ -270,7 +263,6 @@ private:
NonnullRefPtr<VMObject> m_vmobject;
String m_name;
u8 m_access { 0 };
InheritMode m_inherit_mode : 3 { InheritMode::Default };
bool m_shared : 1 { false };
bool m_user_accessible : 1 { false };
bool m_cacheable : 1 { false };

6
Userland/Libraries/LibC/mman.cpp
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@ -93,12 +93,6 @@ int madvise(void* address, size_t size, int advice)
__RETURN_WITH_ERRNO(rc, rc, -1);
}
int minherit(void* address, size_t size, int inherit)
{
int rc = syscall(SC_minherit, address, size, inherit);
__RETURN_WITH_ERRNO(rc, rc, -1);
}
void* allocate_tls(size_t size)
{
int rc = syscall(SC_allocate_tls, size);

3
Userland/Libraries/LibC/mman.h
View File

@ -49,8 +49,6 @@
#define MADV_SET_NONVOLATILE 0x200
#define MADV_GET_VOLATILE 0x400
#define MAP_INHERIT_ZERO 1
__BEGIN_DECLS
void* mmap(void* addr, size_t, int prot, int flags, int fd, off_t);
@ -61,7 +59,6 @@ int munmap(void*, size_t);
int mprotect(void*, size_t, int prot);
int set_mmap_name(void*, size_t, const char*);
int madvise(void*, size_t, int advice);
int minherit(void*, size_t, int inherit);
void* allocate_tls(size_t);
__END_DECLS