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UserspaceEmulator: Support the fstat() and get_process_name() syscalls

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For now, we just pretend that the process name is "EMULATED". We can
probably do better though. :^)
This commit is contained in:
Andreas Kling 2020-07-13 11:14:59 +02:00
parent 20378b8640
commit 4d3787ae33
2 changed files with 25 additions and 0 deletions
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23
DevTools/UserspaceEmulator/Emulator.cpp
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@ -33,6 +33,7 @@
#include <stdio.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <unistd.h>
//#define DEBUG_SPAM
@ -240,6 +241,8 @@ u32 Emulator::virt_syscall(u32 function, u32 arg1, u32 arg2, u32 arg3)
return virt$getgid();
case SC_close:
return virt$close(arg1);
case SC_fstat:
return virt$fstat(arg1, arg2);
case SC_write:
return virt$write(arg1, arg2, arg3);
case SC_read:
@ -256,6 +259,8 @@ u32 Emulator::virt_syscall(u32 function, u32 arg1, u32 arg2, u32 arg3)
return virt$getgroups(arg1, arg2);
case SC_lseek:
return virt$lseek(arg1, arg2, arg3);
case SC_get_process_name:
return virt$get_process_name(arg1, arg2);
case SC_exit:
virt$exit((int)arg1);
return 0;
@ -266,11 +271,29 @@ u32 Emulator::virt_syscall(u32 function, u32 arg1, u32 arg2, u32 arg3)
}
}
int Emulator::virt$fstat(int fd, FlatPtr statbuf)
{
struct stat local_statbuf;
int rc = syscall(SC_fstat, fd, &local_statbuf);
if (rc < 0)
return rc;
mmu().copy_to_vm(statbuf, &local_statbuf, sizeof(local_statbuf));
return rc;
}
int Emulator::virt$close(int fd)
{
return syscall(SC_close, fd);
}
int Emulator::virt$get_process_name(FlatPtr buffer, int size)
{
if (size < 9)
return -ENAMETOOLONG;
mmu().copy_to_vm(buffer, "EMULATED", 9);
return 0;
}
int Emulator::virt$lseek(int fd, off_t offset, int whence)
{
return syscall(SC_lseek, fd, offset, whence);