From fd50228cc213d2d87f5e3cf1f123acb3fda9b04e Mon Sep 17 00:00:00 2001
From: Christoph Muellner <cmuellner@linux.com>
Date: Mon, 28 Jun 2021 00:34:12 +0200
Subject: [PATCH] ldconfig: Add RISC-V support

ldconfig-native does not support RISC-V at the moment.
Let's pull the reqired constants from upstream and add
the required parsing code.

Upstream-Status: Backport

Signed-off-by: Christoph Muellner <cmuellner@linux.com>
---
 cache.c      |  6 ++++++
 ldconfig.h   |  2 ++
 readelflib.c | 10 ++++++++++
 3 files changed, 18 insertions(+)

diff --git a/cache.c b/cache.c
index c4f5411..a3b9e70 100644
--- a/cache.c
+++ b/cache.c
@@ -125,6 +125,12 @@ print_entry (const char *lib, int flag, unsigned int osversion,
     case FLAG_AARCH64_LIB64:
       fputs (",AArch64", stdout);
       break;
+    case FLAG_RISCV_FLOAT_ABI_SOFT:
+      fputs (",soft-float", stdout);
+      break;
+    case FLAG_RISCV_FLOAT_ABI_DOUBLE:
+      fputs (",double-float", stdout);
+      break;
     case 0:
       break;
     default:
diff --git a/ldconfig.h b/ldconfig.h
index 6a8a750..2e5e379 100644
--- a/ldconfig.h
+++ b/ldconfig.h
@@ -38,6 +38,8 @@
 #define FLAG_ARM_LIBHF			0x0900
 #define FLAG_AARCH64_LIB64		0x0a00
 #define FLAG_ARM_LIBSF			0x0b00
+#define FLAG_RISCV_FLOAT_ABI_SOFT	0x0f00
+#define FLAG_RISCV_FLOAT_ABI_DOUBLE	0x1000
 
 /* Name of auxiliary cache.  */
 #define _PATH_LDCONFIG_AUX_CACHE "/var/cache/ldconfig/aux-cache"
diff --git a/readelflib.c b/readelflib.c
index 9ec0a54..a01e1ce 100644
--- a/readelflib.c
+++ b/readelflib.c
@@ -33,6 +33,10 @@
 #define EM_AARCH64	183		/* ARM AARCH64 */
 #endif
 
+#ifndef EM_RISCV
+#define EM_RISCV	243		/* RISC-V */
+#endif
+
 #undef check_ptr
 #define check_ptr(ptr)						\
 do								\
@@ -331,6 +335,12 @@ process_elf_file64 (const char *file_name, const char *lib, int *flag,
       /* see sysdeps/unix/sysv/linux/arm/readelflib.c */
       *flag |= FLAG_AARCH64_LIB64|FLAG_ELF_LIBC6;
       break;
+    case EM_RISCV:
+      /* RISC-V libraries are always libc.so.6+. */
+      /* NOTE: This does not correctly handle soft-float binaries */
+      /* see sysdeps/unix/sysv/linux/riscv/readelflib.c */
+      *flag |= FLAG_RISCV_FLOAT_ABI_DOUBLE|FLAG_ELF_LIBC6;
+      break;
     default:
       error(0, 0, "%s is a 64-bit ELF for unknown machine %lx\n",
             file_name, (long)elf_header->e_machine);
-- 
2.25.1