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Implement errno in LibC.

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This also meant I had to implement BSS (SHT_NOBITS) sections in ELFLoader.
I also added an strerror() so we can print out what the errors are.
This commit is contained in:
Andreas Kling 2018-10-25 12:06:00 +02:00
parent 434b6a8688
commit 260b14e505
14 changed files with 209 additions and 27 deletions
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46
LibC/string.cpp
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@ -1,4 +1,6 @@
#include "string.h"
#include "errno.h"
#include "stdio.h"
extern "C" {
@ -10,5 +12,49 @@ size_t strlen(const char* str)
return len;
}
const char* strerror(int errnum)
{
switch (errnum) {
case 0: return "No error";
case EPERM: return "Operation not permitted";
case ENOENT: return "No such file or directory";
case ESRCH: return "No such process";
case EINTR: return "Interrupted syscall";
case EIO: return "I/O error";
case ENXIO: return "No such device/address";
case E2BIG: return "Argument list too long";
case ENOEXEC: return "Exec format error";
case EBADF: return "Bad fd number";
case ECHILD: return "No child processes";
case EAGAIN: return "Try again";
case ENOMEM: return "Out of memory";
case EACCES: return "Access denied";
case EFAULT: return "Bad address";
case ENOTBLK: return "Not a block device";
case EBUSY: return "Resource busy";
case EEXIST: return "File already exists";
case EXDEV: return "Cross-device link";
case ENODEV: return "No such device";
case ENOTDIR: return "Not a directory";
case EISDIR: return "Is a directory";
case EINVAL: return "Invalid argument";
case ENFILE: return "File table overflow";
case EMFILE: return "Too many open files";
case ENOTTY: return "Not a TTY";
case ETXTBSY: return "Text file busy";
case EFBIG: return "File too big";
case ENOSPC: return "No space left";
case ESPIPE: return "Illegal seek";
case EROFS: return "File system is read-only";
case EMLINK: return "Too many links";
case EPIPE: return "Broken pipe";
case EDOM: return "Math argument out of domain";
case ERANGE: return "Math result not representable";
case EOVERFLOW: return "Value too large for data type";
}
printf("strerror() missing string for errnum=%d\n", errnum);
return "Unknown error";
}
}