Add some _chk interfaces

1 files changed, 114 insertions, 1 deletions

diff --git a/stdio.c b/stdio.c
index f26b69b..bef7ef8 100644
--- a/stdio.c
+++ b/stdio.c
@@ -1,3 +1,116 @@
+#include <assert.h>
+#include <stdarg.h>
 #include <stdio.h>
+#include <wchar.h>
+
+size_t __fread_chk(void *ptr, size_t size, size_t nmemb, FILE *stream)
+{
+	assert(ptr != NULL);
+	assert(stream != NULL);
+	return fread(ptr, size, nmemb, stream);
+}
+
+int __printf_chk(int flag, const char *format, ...)
+{
+	va_list argp;
+	int result;
+
+	if(flag > 0)
+	{
+		assert(format != NULL);
+	}
+
+	va_start(argp, format);
+	result = vprintf(format, argp);
+	va_end(argp);
+
+	return result;
+}
+
+int __fprintf_chk(FILE *stream, int flag, const char *format, ...)
+{
+	va_list argp;
+	int result;
+
+	if(flag > 0)
+	{
+		assert(stream != NULL);
+		assert(format != NULL);
+	}
+
+	va_start(argp, format);
+	result = vfprintf(stream, format, argp);
+	va_end(argp);
+
+	return result;
+}
+
+int __snprintf_chk(char *str, size_t size, int flag, size_t strlen, const char *format, ...)
+{
+	va_list argp;
+	int result;
+
+	if(flag > 0)
+	{
+		assert(str != NULL);
+		assert(format != NULL);
+	}
+	// must always be done per LFS
+	assert(size <= strlen);
+
+	va_start(argp, format);
+	result = vsnprintf(str, size, format, argp);
+	va_end(argp);
+
+	return result;
+}
+
+int __swprintf_chk(wchar_t *wcs, size_t maxlen, int flag, size_t wcslen, const wchar_t *format, ...)
+{
+	va_list argp;
+	int result;
+
+	if(flag > 0)
+	{
+		assert(wcs != NULL);
+		assert(format != NULL);
+	}
+	// must always be done per LFS
+	assert(maxlen <= wcslen);
+
+	va_start(argp, format);
+	result = vswprintf(wcs, maxlen, format, argp);
+	va_end(argp);
+
+	return result;
+}
+
+int __vasprintf_chk(char **strp, const char *fmt, va_list ap)
+{
+	assert(strp != NULL);
+	assert(fmt != NULL);
+	return vasprintf(strp, fmt, ap);
+}
+
+int __vfprintf_chk(FILE *stream, int flag, const char *format, va_list ap)
+{
+	if(flag > 0)
+	{
+		assert(stream != NULL);
+		assert(format != NULL);
+	}
+	return vfprintf(stream, format, ap);
+}
+
+int __vsnprintf_chk(char *str, size_t size, int flag, size_t strlen, const char *format, va_list ap)
+{
+	if(flag > 0)
+	{
+		assert(str != NULL);
+		assert(format != NULL);
+	}
+	// must always be done per LFS
+	assert(size <= strlen);
+	return vsnprintf(str, size, format, ap);
+}
 
-asm(".equ __IO_2_1_stdout_, _stdout");