Documented SELF loader relocations

AlexAltea · Jan 21, 2015 · d761619 · d761619
1 parent 06f8417
commit d761619
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Showing 2 changed files with 17 additions and 6 deletions.
diff --git a/nucleus/loader/self.cpp b/nucleus/loader/self.cpp
@@ -222,22 +222,22 @@ bool SELFLoader::load_prx(sys_prx_t* prx)
                 u32 value = 0;
 
                 switch (rel.type.ToLE()) {
-                case 1:  // Patch 32-bit pointers
+                case R_PPC64_ADDR32:
                     value = (u32)prx->segments[rel.index_value].addr + rel.ptr;
                     nucleus.memory.write32(addr, value);
                     break;
 
-                case 4:  // Patch lower 16-bits of pointers (by using the relocation's immediate value)
+                case R_PPC64_ADDR16_LO:
                     value = (u16)rel.ptr;
                     nucleus.memory.write16(addr, value);
                     break;
 
-                case 5:  // Patch higher 16-bits of pointers (by using the base address of the segment
+                case R_PPC64_ADDR16_HI:
                     value = (u16)(prx->segments[rel.index_value].addr >> 16);
                     nucleus.memory.write16(addr, value);
                     break;
 
-                case 6:  // Same (TODO: Is there any difference compared to flags == 5?)
+                case R_PPC64_ADDR16_HA:
                     value = (u16)(prx->segments[1].addr >> 16);
                     nucleus.memory.write16(addr, value);
                     break;

diff --git a/nucleus/loader/self.h b/nucleus/loader/self.h
@@ -11,8 +11,7 @@
 #include <string>
 
 // Segment Types
-enum
-{
+enum {
     // Common segments
     PT_LOAD     = 0x1,
     PT_DYNAMIC  = 0x2,
@@ -28,6 +27,18 @@ enum
     PT_SCE_PPURELA  = 0x700000A4,
 };
 
+// Relocations
+enum {
+    R_PPC64_NONE       = 0, // Nothing
+    R_PPC64_ADDR32     = 1, // u32:  (S + A)
+    R_PPC64_ADDR24     = 2, // u24:  (S + A) >> 2
+    R_PPC64_ADDR16     = 3, // u16:  (S + A)
+    R_PPC64_ADDR16_LO  = 4, // u16:  LO(S + A)
+    R_PPC64_ADDR16_HI  = 5, // u16:  HI(S + A)
+    R_PPC64_ADDR16_HA  = 6, // u16:  HA(S + A)
+    R_PPC64_ADDR14     = 7, // u14:  (S + A) >> 2
+};
+
 // SELF structs
 struct SceHeader
 {