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UserspaceEmulator: Add the ttyname syscall

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This commit is contained in:
Andreas Kling 2020-08-05 19:43:49 +02:00
parent 9d93e208ac
commit b187a42e53
2 changed files with 13 additions and 0 deletions
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12
DevTools/UserspaceEmulator/Emulator.cpp
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@ -250,6 +250,8 @@ u32 Emulator::virt_syscall(u32 function, u32 arg1, u32 arg2, u32 arg3)
dbgprintf("Syscall: %s (%x)\n", Syscall::to_string((Syscall::Function)function), function); dbgprintf("Syscall: %s (%x)\n", Syscall::to_string((Syscall::Function)function), function);
#endif #endif
switch (function) { switch (function) {
case SC_ttyname:
return virt$ttyname(arg1, arg2, arg3);
case SC_getpgrp: case SC_getpgrp:
return virt$getpgrp(); return virt$getpgrp();
case SC_execve: case SC_execve:
@ -1244,4 +1246,14 @@ int Emulator::virt$getpgrp()
return syscall(SC_getpgrp); return syscall(SC_getpgrp);
} }
int Emulator::virt$ttyname(int fd, FlatPtr buffer, size_t buffer_size)
{
auto host_buffer = ByteBuffer::create_zeroed(buffer_size);
int rc = syscall(SC_ttyname, fd, host_buffer.data(), host_buffer.size());
if (rc < 1)
return rc;
mmu().copy_to_vm(buffer, host_buffer.data(), host_buffer.size());
return rc;
}
} }

1
DevTools/UserspaceEmulator/Emulator.h
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@ -137,6 +137,7 @@ private:
ssize_t virt$getrandom(FlatPtr buffer, size_t buffer_size, unsigned int flags); ssize_t virt$getrandom(FlatPtr buffer, size_t buffer_size, unsigned int flags);
int virt$sleep(unsigned); int virt$sleep(unsigned);
int virt$getpgrp(); int virt$getpgrp();
int virt$ttyname(int fd, FlatPtr buffer, size_t buffer_size);
FlatPtr allocate_vm(size_t size, size_t alignment); FlatPtr allocate_vm(size_t size, size_t alignment);