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Implement pread64 and pwrite64 syscalls

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EnderIce2 2024-03-20 17:38:17 +02:00
parent a5ca3b3995
commit a1cda40743
Signed by untrusted user who does not match committer: enderice2
GPG Key ID: EACC3AD603BAB4DD
1 changed files with 40 additions and 4 deletions
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44
syscalls/linux.cpp
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@ -471,6 +471,42 @@ static int linux_ioctl(SysFrm *, int fd, unsigned long request, void *argp)
return fdt->_ioctl(fd, request, pArgp);
}
/* https://man7.org/linux/man-pages/man2/pread.2.html */
static ssize_t linux_pread64(SysFrm *, int fd, void *buf, size_t count, off_t offset)
{
PCB *pcb = thisProcess;
Memory::VirtualMemoryArea *vma = pcb->vma;
void *pBuf = vma->UserCheckAndGetAddress(buf, count);
if (pBuf == nullptr)
return -EFAULT;
vfs::FileDescriptorTable *fdt = pcb->FileDescriptors;
off_t oldOff = fdt->_lseek(fd, 0, SEEK_CUR);
fdt->_lseek(fd, offset, SEEK_SET);
ssize_t ret = fdt->_read(fd, pBuf, count);
fdt->_lseek(fd, oldOff, SEEK_SET);
return ret;
}
/* https://man7.org/linux/man-pages/man2/pread.2.html */
static ssize_t linux_pwrite64(SysFrm *, int fd, const void *buf, size_t count, off_t offset)
{
PCB *pcb = thisProcess;
Memory::VirtualMemoryArea *vma = pcb->vma;
const void *pBuf = vma->UserCheckAndGetAddress(buf, count);
if (pBuf == nullptr)
return -EFAULT;
vfs::FileDescriptorTable *fdt = pcb->FileDescriptors;
off_t oldOff = fdt->_lseek(fd, 0, SEEK_CUR);
fdt->_lseek(fd, offset, SEEK_SET);
ssize_t ret = fdt->_write(fd, pBuf, count);
fdt->_lseek(fd, oldOff, SEEK_SET);
return ret;
}
/* https://man7.org/linux/man-pages/man2/readv.2.html */
static ssize_t linux_readv(SysFrm *sf, int fildes, const struct iovec *iov, int iovcnt)
{
@ -2036,8 +2072,8 @@ static SyscallData LinuxSyscallsTableAMD64[] = {
[__NR_amd64_rt_sigprocmask] = {"rt_sigprocmask", (void *)linux_sigprocmask},
[__NR_amd64_rt_sigreturn] = {"rt_sigreturn", (void *)linux_sigreturn},
[__NR_amd64_ioctl] = {"ioctl", (void *)linux_ioctl},
[__NR_amd64_pread64] = {"pread64", (void *)nullptr},
[__NR_amd64_pwrite64] = {"pwrite64", (void *)nullptr},
[__NR_amd64_pread64] = {"pread64", (void *)linux_pread64},
[__NR_amd64_pwrite64] = {"pwrite64", (void *)linux_pwrite64},
[__NR_amd64_readv] = {"readv", (void *)linux_readv},
[__NR_amd64_writev] = {"writev", (void *)linux_writev},
[__NR_amd64_access] = {"access", (void *)linux_access},
@ -2649,8 +2685,8 @@ static SyscallData LinuxSyscallsTableI386[] = {
[__NR_i386_rt_sigtimedwait] = {"rt_sigtimedwait", (void *)nullptr},
[__NR_i386_rt_sigqueueinfo] = {"rt_sigqueueinfo", (void *)nullptr},
[__NR_i386_rt_sigsuspend] = {"rt_sigsuspend", (void *)nullptr},
[__NR_i386_pread64] = {"pread64", (void *)nullptr},
[__NR_i386_pwrite64] = {"pwrite64", (void *)nullptr},
[__NR_i386_pread64] = {"pread64", (void *)linux_pread64},
[__NR_i386_pwrite64] = {"pwrite64", (void *)linux_pwrite64},
[__NR_i386_chown] = {"chown", (void *)nullptr},
[__NR_i386_getcwd] = {"getcwd", (void *)nullptr},
[__NR_i386_capget] = {"capget", (void *)nullptr},