efi_loader: Enable RISC-V support

[u-boot] / lib / efi_loader / efi_runtime.c

diff --git a/lib/efi_loader/efi_runtime.c b/lib/efi_loader/efi_runtime.c
index 042f9ae56f421b04c1ce186b06380c0b184357cd..241090f6b4842639b2911032b1e0a731df27de97 100644 (file)
--- a/lib/efi_loader/efi_runtime.c
+++ b/lib/efi_loader/efi_runtime.c
@@ -40,6 +40,25 @@ static efi_status_t __efi_runtime EFIAPI efi_invalid_parameter(void);
 #include <asm/elf.h>
 #define R_RELATIVE     R_386_RELATIVE
 #define R_MASK         0xffULL
+#elif defined(CONFIG_RISCV)
+#include <elf.h>
+#define R_RELATIVE     R_RISCV_RELATIVE
+#define R_MASK         0xffULL
+#define IS_RELA                1
+
+struct dyn_sym {
+       ulong foo1;
+       ulong addr;
+       u32 foo2;
+       u32 foo3;
+};
+#ifdef CONFIG_CPU_RISCV_32
+#define R_ABSOLUTE     R_RISCV_32
+#define SYM_INDEX      8
+#else
+#define R_ABSOLUTE     R_RISCV_64
+#define SYM_INDEX      32
+#endif
 #else
 #error Need to add relocation awareness
 #endif
@@ -246,15 +265,27 @@ void efi_runtime_relocate(ulong offset, struct efi_mem_desc *map)
 
                p = (void*)((ulong)rel->offset - base) + gd->relocaddr;
 
-               if ((rel->info & R_MASK) != R_RELATIVE) {
-                       continue;
-               }
+               debug("%s: rel->info=%#lx *p=%#lx rel->offset=%p\n", __func__, rel->info, *p, rel->offset);
 
+               switch (rel->info & R_MASK) {
+               case R_RELATIVE:
 #ifdef IS_RELA
                newaddr = rel->addend + offset - CONFIG_SYS_TEXT_BASE;
 #else
                newaddr = *p - lastoff + offset;
 #endif
+                       break;
+#ifdef R_ABSOLUTE
+               case R_ABSOLUTE: {
+                       ulong symidx = rel->info >> SYM_INDEX;
+                       extern struct dyn_sym __dyn_sym_start[];
+                       newaddr = __dyn_sym_start[symidx].addr + offset;
+                       break;
+               }
+#endif
+               default:
+                       continue;
+               }
 
                /* Check if the relocation is inside bounds */
                if (map && ((newaddr < map->virtual_start) ||