3rd-party/linux-kernel-module-cheat
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build-baremetal: enable parallel build and target selection just like build-userland

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The factoring out also led to some small bugs being found and solved ;-)
This commit is contained in:
Ciro Santilli 六四事件 法轮功
2019-05-17 00:00:00 +00:00
parent 455d5e191c
commit 635e5e3133
15 changed files with 167 additions and 150 deletions
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42
baremetal/lib/syscalls.c
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@@ -2,6 +2,7 @@
#include <stdlib.h>
#include <sys/stat.h>
#include <lkmc.h>
#include <lkmc/m5ops.h>
enum {
@@ -11,10 +12,14 @@ enum {
#define UART_DR(baseaddr) (*(unsigned int *)(baseaddr))
#define UART_FR(baseaddr) (*(((unsigned int *)(baseaddr))+6))
int _close(int file) { return -1; }
int _close(int file) {
LKMC_UNUSED(file);
return -1;
}
void _exit(int status) {
#if defined(GEM5)
LKMC_UNUSED(status);
#if LKMC_GEM5
LKMC_M5OPS_EXIT;
#else
#if defined(__arm__)
@@ -46,6 +51,7 @@ void _exit(int status) {
}
int _fstat(int file, struct stat *st) {
LKMC_UNUSED(file);
st->st_mode = S_IFCHR;
return 0;
}
@@ -55,26 +61,41 @@ int _getpid(void) { return 0; }
/* Required by assert. */
int _kill(pid_t pid, int sig) {
LKMC_UNUSED(pid);
exit(128 + sig);
}
int _isatty(int file) { return 1; }
int _isatty(int file) {
LKMC_UNUSED(file);
return 1;
}
int _lseek(int file, int ptr, int dir) { return 0; }
int _lseek(int file, int ptr, int dir) {
LKMC_UNUSED(file);
LKMC_UNUSED(ptr);
LKMC_UNUSED(dir);
return 0;
}
int _open(const char *name, int flags, int mode) { return -1; }
int _open(const char *name, int flags, int mode) {
LKMC_UNUSED(name);
LKMC_UNUSED(flags);
LKMC_UNUSED(mode);
return -1;
}
int _read(int file, char *ptr, int len) {
int todo;
LKMC_UNUSED(file);
if (len == 0)
return 0;
while (UART_FR(UART0_ADDR) & UART_FR_RXFE);
*ptr++ = UART_DR(UART0_ADDR);
while (UART_FR(LKMC_UART0_ADDR) & UART_FR_RXFE);
*ptr++ = UART_DR(LKMC_UART0_ADDR);
for (todo = 1; todo < len; todo++) {
if (UART_FR(UART0_ADDR) & UART_FR_RXFE) {
if (UART_FR(LKMC_UART0_ADDR) & UART_FR_RXFE) {
break;
}
*ptr++ = UART_DR(UART0_ADDR);
*ptr++ = UART_DR(LKMC_UART0_ADDR);
}
return todo;
}
@@ -98,8 +119,9 @@ caddr_t _sbrk(int incr) {
int _write(int file, char *ptr, int len) {
int todo;
LKMC_UNUSED(file);
for (todo = 0; todo < len; todo++) {
UART_DR(UART0_ADDR) = *ptr++;
UART_DR(LKMC_UART0_ADDR) = *ptr++;
}
return len;
}