From: Stefano Garzarella <sgarzare@redhat.com>
To: Paolo Bonzini <pbonzini@redhat.com>, qemu-devel@nongnu.org
Cc: "Philippe Mathieu-Daudé" <philmd@redhat.com>
Subject: [PATCH v2 1/2] optionrom: add memcmp() implementation
Date: Tue, 23 Mar 2021 10:22:10 +0100 [thread overview]
Message-ID: <20210323092211.44597-2-sgarzare@redhat.com> (raw)
In-Reply-To: <20210323092211.44597-1-sgarzare@redhat.com>
Provide memcmp() implementation that can be used by optionroms.
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
---
pc-bios/optionrom/optrom.h | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/pc-bios/optionrom/optrom.h b/pc-bios/optionrom/optrom.h
index 357819259a..b98436e413 100644
--- a/pc-bios/optionrom/optrom.h
+++ b/pc-bios/optionrom/optrom.h
@@ -25,6 +25,7 @@
#define OPTROM_H
#include <stdint.h>
+#include <stddef.h>
#include "../../include/standard-headers/linux/qemu_fw_cfg.h"
#define barrier() asm("" : : : "memory")
@@ -107,4 +108,18 @@ static inline uint32_t be32_to_cpu(uint32_t x)
return bswap32(x);
}
+static inline int memcmp(const void *str1, const void *str2, size_t count)
+{
+ const unsigned char *c1 = str1, *c2 = str2;
+ int ret = 0;
+
+ while (count--) {
+ ret = *c1++ - *c2++;
+ if (ret) {
+ break;
+ }
+ }
+
+ return ret;
+}
#endif /* OPTROM_H */
--
2.30.2
next prev parent reply other threads:[~2021-03-23 9:23 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-23 9:22 [PATCH v2 0/2] optionrom/pvh: use memcmp() to find the RSDP signature Stefano Garzarella
2021-03-23 9:22 ` Stefano Garzarella [this message]
2021-03-23 9:22 ` [PATCH v2 2/2] " Stefano Garzarella
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