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UserspaceEmulator: Add the getcwd syscall

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This commit is contained in:
Andreas Kling 2020-08-05 19:46:08 +02:00
parent b187a42e53
commit c497603177
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_getcwd:
return virt$getcwd(arg1, arg2);
case SC_ttyname: case SC_ttyname:
return virt$ttyname(arg1, arg2, arg3); return virt$ttyname(arg1, arg2, arg3);
case SC_getpgrp: case SC_getpgrp:
@ -1256,4 +1258,14 @@ int Emulator::virt$ttyname(int fd, FlatPtr buffer, size_t buffer_size)
return rc; return rc;
} }
int Emulator::virt$getcwd(FlatPtr buffer, size_t buffer_size)
{
auto host_buffer = ByteBuffer::create_zeroed(buffer_size);
int rc = syscall(SC_getcwd, 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
View file

@ -138,6 +138,7 @@ private:
int virt$sleep(unsigned); int virt$sleep(unsigned);
int virt$getpgrp(); int virt$getpgrp();
int virt$ttyname(int fd, FlatPtr buffer, size_t buffer_size); int virt$ttyname(int fd, FlatPtr buffer, size_t buffer_size);
int virt$getcwd(FlatPtr buffer, size_t buffer_size);
FlatPtr allocate_vm(size_t size, size_t alignment); FlatPtr allocate_vm(size_t size, size_t alignment);