From 3eb12cc8e9a0877ca8e27dba496a980d5672d020 Mon Sep 17 00:00:00 2001
From: David Garske <david@wolfssl.com>
Date: Fri, 4 Sep 2020 11:26:24 -0700
Subject: [PATCH] Port for Xilinx (xilffs) file system support.

---
 wolfssl/ssl.h               |  4 ++--
 wolfssl/wolfcrypt/wc_port.h | 17 +++++++++++++++++
 2 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/wolfssl/ssl.h b/wolfssl/ssl.h
index 26fe814d4..c0cf8892b 100644
--- a/wolfssl/ssl.h
+++ b/wolfssl/ssl.h
@@ -2167,7 +2167,7 @@ WOLFSSL_API WOLFSSL_X509*
 WOLFSSL_API int wolfSSL_i2d_X509(WOLFSSL_X509* x509, unsigned char** out);
 WOLFSSL_API WOLFSSL_X509_CRL *wolfSSL_d2i_X509_CRL(WOLFSSL_X509_CRL **crl,
                                                    const unsigned char *in, int len);
-#ifndef NO_FILESYSTEM
+#if !defined(NO_FILESYSTEM) && !defined(NO_STDIO_FILESYSTEM)
 WOLFSSL_API WOLFSSL_X509_CRL *wolfSSL_d2i_X509_CRL_fp(XFILE file, WOLFSSL_X509_CRL **crl);
 #endif
 WOLFSSL_API void wolfSSL_X509_CRL_free(WOLFSSL_X509_CRL *crl);
@@ -2202,7 +2202,7 @@ typedef struct WC_PKCS12 WC_PKCS12;
 WOLFSSL_API WC_PKCS12* wolfSSL_d2i_PKCS12_bio(WOLFSSL_BIO* bio,
                                        WC_PKCS12** pkcs12);
 WOLFSSL_API int wolfSSL_i2d_PKCS12_bio(WOLFSSL_BIO *bio, WC_PKCS12 *pkcs12);
-#ifndef NO_FILESYSTEM
+#if !defined(NO_FILESYSTEM) && !defined(NO_STDIO_FILESYSTEM)
 WOLFSSL_API WOLFSSL_X509_PKCS12* wolfSSL_d2i_PKCS12_fp(XFILE fp,
                                        WOLFSSL_X509_PKCS12** pkcs12);
 #endif
diff --git a/wolfssl/wolfcrypt/wc_port.h b/wolfssl/wolfcrypt/wc_port.h
index 1c5316563..08a1d2f9e 100644
--- a/wolfssl/wolfcrypt/wc_port.h
+++ b/wolfssl/wolfcrypt/wc_port.h
@@ -418,6 +418,23 @@ WOLFSSL_API int wolfCrypt_Cleanup(void);
     #define XBADFILE                 -1
     #define XFGETS(b,s,f)            -2 /* Not ported yet */
 
+#elif defined (WOLFSSL_XILINX)
+    #include "xsdps.h"
+    #include "ff.h"
+
+    /* workaround to declare variable and provide type */
+    #define XFILE                    FIL curFile; FIL*
+    #define XFOPEN(NAME, MODE)       ({ FRESULT res; res = f_open(&curFile, (NAME), (FA_OPEN_ALWAYS | FA_WRITE | FA_READ)); (res == FR_OK) ? &curFile : NULL; })
+    #define XFSEEK(F, O, W)          f_lseek((F), (O))
+    #define XFTELL(F)                f_tell((F))
+    #define XREWIND(F)               f_rewind((F))
+    #define XFREAD(BUF, SZ, AMT, F)  ({ FRESULT res; UINT br; res = f_read((F), (BUF), (SZ)*(AMT), &br); (void)br; res; })
+    #define XFWRITE(BUF, SZ, AMT, F) ({ FRESULT res; UINT written; res = f_write((F), (BUF), (SZ)*(AMT), &written); (void)written; res; })
+    #define XFCLOSE(F)               f_close((F))
+    #define XSEEK_END                0
+    #define XBADFILE                 NULL
+    #define XFGETS(b,s,f)            f_gets((b), (s), (f))
+
 #elif defined(WOLFSSL_USER_FILESYSTEM)
     /* To be defined in user_settings.h */
 #else