tailix/libkernaux
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Use [u]int(8|16|32)_t from <stdint.h>

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This commit is contained in:
Alex Kotov 2021-12-16 21:04:41 +05:00
parent 9636303f86
commit 745c403fa2
Signed by: kotovalexarian
GPG key ID: 553C0EBBEB5D5F08
2 changed files with 38 additions and 37 deletions
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16
README.md
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@ -85,11 +85,22 @@ You can test with `make check`.
### Cross
The library depends on `stdint.h` header. According to the standards it must be
present in freestanding environment. However when you build GCC cross-compiler
using [instructions from OSDev Wiki](https://wiki.osdev.org/GCC_Cross-Compiler)
the header is missing. To fix this issue you may add `use_gcc_stdint=provide` to
the end of `gcc/config.gcc` in your GCC source code extracted from tarball:
```
echo 'use_gcc_stdint=provide' >> gcc-11.2.0/gcc/config.gcc
```
---
Create configuration script with `./autogen.sh`.
Let's assume that your target triplet is `i386-elf`. Configure with
[cross-compiler](https://wiki.osdev.org/GCC_Cross-Compiler) in `$PATH` to make
without it in `$PATH`:
cross-compiler in `$PATH` to make without it in `$PATH`:
```
./configure \
@ -233,3 +244,4 @@ SUM: 29 422 89 2186
* `stdarg.h`
* `stdbool.h`
* `stddef.h`
* `stdint.h`

59
include/kernaux/arch/i386.h
View file

@ -1,5 +1,3 @@
// TODO: Use [u]int(8|16|32)_t when problem with <stdint.h> is fixed.
#ifndef KERNAUX_INCLUDED_ARCH_I386
#define KERNAUX_INCLUDED_ARCH_I386 1
@ -7,67 +5,58 @@
extern "C" {
#endif
inline static unsigned char kernaux_arch_i386_inportb(unsigned short port);
inline static unsigned short kernaux_arch_i386_inportw(unsigned short port);
inline static unsigned int kernaux_arch_i386_inportd(unsigned short port);
#include <stdint.h>
inline static void
kernaux_arch_i386_outportb(unsigned short port, unsigned char value);
inline static uint8_t kernaux_arch_i386_inportb(uint16_t port);
inline static uint16_t kernaux_arch_i386_inportw(uint16_t port);
inline static uint32_t kernaux_arch_i386_inportd(uint16_t port);
inline static void
kernaux_arch_i386_outportw(unsigned short port, unsigned short value);
inline static void
kernaux_arch_i386_outportd(unsigned short port, unsigned int value);
inline static void kernaux_arch_i386_outportb(uint16_t port, uint8_t value);
inline static void kernaux_arch_i386_outportw(uint16_t port, uint16_t value);
inline static void kernaux_arch_i386_outportd(uint16_t port, uint32_t value);
void kernaux_arch_i386_hang() __attribute__((noreturn));
unsigned long kernaux_arch_i386_read_cr0();
unsigned long kernaux_arch_i386_read_cr4();
uint16_t kernaux_arch_i386_read_cr0();
uint16_t kernaux_arch_i386_read_cr4();
void kernaux_arch_i386_write_cr0(volatile unsigned long value);
void kernaux_arch_i386_write_cr3(volatile unsigned long value);
void kernaux_arch_i386_write_cr4(volatile unsigned long value);
void kernaux_arch_i386_write_cr0(volatile uint16_t value);
void kernaux_arch_i386_write_cr3(volatile uint16_t value);
void kernaux_arch_i386_write_cr4(volatile uint16_t value);
unsigned char kernaux_arch_i386_inportb(const unsigned short port)
uint8_t kernaux_arch_i386_inportb(const uint16_t port)
{
register unsigned char result;
register uint8_t result;
__asm__ volatile("inb %1, %0" : "=a" (result) : "dN" (port));
return result;
}
unsigned short kernaux_arch_i386_inportw(const unsigned short port)
uint16_t kernaux_arch_i386_inportw(const uint16_t port)
{
register unsigned short result;
register uint16_t result;
__asm__ volatile("inw %1, %0" : "=a" (result) : "dN" (port));
return result;
}
unsigned int kernaux_arch_i386_inportd(const unsigned short port)
uint32_t kernaux_arch_i386_inportd(const uint16_t port)
{
register unsigned int result;
register uint32_t result;
__asm__ volatile("ind %1, %0" : "=a" (result) : "dN" (port));
return result;
}
void kernaux_arch_i386_outportb(
const unsigned short port,
const unsigned char value
) {
void kernaux_arch_i386_outportb(const uint16_t port, const uint8_t value)
{
__asm__ volatile("outb %1, %0" : : "dN" (port), "a" (value));
}
void kernaux_arch_i386_outportw(
const unsigned short port,
const unsigned short value
) {
void kernaux_arch_i386_outportw(const uint16_t port, const uint16_t value)
{
__asm__ volatile("outw %1, %0" : : "dN" (port), "a" (value));
}
void kernaux_arch_i386_outportd(
const unsigned short port,
const unsigned int value
) {
void kernaux_arch_i386_outportd(const uint16_t port, const uint32_t value)
{
__asm__ volatile("outd %1, %0" : : "dN" (port), "a" (value));
}