From: Peter Johnson <peter@tortall.net>
Date: Mon, 11 Oct 2004 04:30:08 +0000 (-0000)
Subject: * elf.h: Update x86 and amd64 relocation types and associated comments.
X-Git-Tag: v0.4.0~10
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=7f8d2c0cca344dd486c1cb093ef6c21e3acc5b05;p=yasm

* elf.h: Update x86 and amd64 relocation types and associated comments.
* elf-x86-x86.c: Add 8-bit and 16-bit relocations (GNU extensions).

* tests/Makefile.inc: Rename elfreloc-err to elfreloc-ext, because relocs
tested in elfreloc-err are now legal due to above changes.
* elfreloc-ext.asm: Likewise.
* elfreloc-ext.errwarn: Likewise.
* elfreloc-ext.hex: New output file.

svn path=/trunk/yasm/; revision=1161
---

diff --git a/modules/objfmts/elf/elf-x86-x86.c b/modules/objfmts/elf/elf-x86-x86.c
index dd0e08aa..689622e1 100644
--- a/modules/objfmts/elf/elf-x86-x86.c
+++ b/modules/objfmts/elf/elf-x86-x86.c
@@ -38,7 +38,7 @@
 static int
 elf_x86_x86_accepts_reloc_size(size_t val)
 {
-    return val == 32;
+    return (val&(val-1)) ? 0 : ((val & (8|16|32)) != 0);
 }
 
 static void
@@ -119,7 +119,22 @@ elf_x86_x86_handle_reloc_addend(yasm_intnum *intn, elf_reloc_entry *reloc)
 static unsigned int
 elf_x86_x86_map_reloc_info_to_type(elf_reloc_entry *reloc)
 {
-    return (reloc->rtype_rel ? R_386_PC32 : R_386_32);
+    if (reloc->rtype_rel) {
+        switch (reloc->valsize) {
+            case 8: return (unsigned char) R_386_PC8;
+            case 16: return (unsigned char) R_386_PC16;
+            case 32: return (unsigned char) R_386_PC32;
+            default: yasm_internal_error(N_("Unsupported relocation size"));
+        }
+    } else {
+        switch (reloc->valsize) {
+            case 8: return (unsigned char) R_386_8;
+            case 16: return (unsigned char) R_386_16;
+            case 32: return (unsigned char) R_386_32;
+            default: yasm_internal_error(N_("Unsupported relocation size"));
+        }
+    }
+    return 0;
 }
 
 static void
diff --git a/modules/objfmts/elf/elf.h b/modules/objfmts/elf/elf.h
index c3cacd29..edf62f7c 100644
--- a/modules/objfmts/elf/elf.h
+++ b/modules/objfmts/elf/elf.h
@@ -231,38 +231,84 @@ typedef enum {
 #define RELOC64_ALIGN 8
 
 
-/* elf relocation type - index of semantics */
+/* elf relocation type - index of semantics
+ *
+ * A = Addend (r_addend for RELA, value at location for REL)
+ * B = Base address
+ * G = Offset into global offset table (GOT)
+ * GOT = Address of the global offset table (GOT)
+ * L = Location of procedure linkage table (PLT)
+ * P = Location of location being relocated (r_offset)
+ * S = Value of symbol
+ */
 typedef enum {
     R_386_NONE = 0,		/* none */
-    R_386_32 = 1,		/* word, S + A */
-    R_386_PC32 = 2,		/* word, S + A - P */
-    R_386_GOT32 = 3,		/* word, G + A - P */
-    R_386_PLT32 = 4,		/* word, L + A - P */
+    R_386_32 = 1,		/* word32, S + A */
+    R_386_PC32 = 2,		/* word32, S + A - P */
+    R_386_GOT32 = 3,		/* word32, G + A - P */
+    R_386_PLT32 = 4,		/* word32, L + A - P */
     R_386_COPY = 5,		/* none */
-    R_386_GLOB_DAT = 6,		/* word, S */
-    R_386_JMP_SLOT = 7,		/* word, S */
-    R_386_RELATIVE = 8,		/* word, B + A */
-    R_386_GOTOFF = 9,		/* word, S + A - GOT */
-    R_386_GOTPC = 10		/* word, GOT + A - P */
+    R_386_GLOB_DAT = 6,		/* word32, S */
+    R_386_JMP_SLOT = 7,		/* word32, S */
+    R_386_RELATIVE = 8,		/* word32, B + A */
+    R_386_GOTOFF = 9,		/* word32, S + A - GOT */
+    R_386_GOTPC = 10,		/* word32, GOT + A - P */
+    R_386_TLS_TPOFF = 14,	/* Negative offset in static TLS block (GNU
+				   version) */
+    R_386_TLS_IE = 15,		/* Absolute address of GOT entry for negative
+				   static TLS block offset */
+    R_386_TLS_GOTIE = 16,	/* GOT entry for negative static TLS block
+				   offset */
+    R_386_TLS_LE = 17,		/* Negative offset relative to static TLS
+				   (GNU version) */
+    R_386_TLS_GD = 18,		/* Direct 32 bit for GNU version of GD TLS */
+    R_386_TLS_LDM = 19,		/* Direct 32 bit for GNU version of LD TLS
+				   in LE code */
+    R_386_16 = 20,		/* word16, S + A (GNU extension) */
+    R_386_PC16 = 21,		/* word16, S + A - P (GNU extension) */
+    R_386_8 = 22,		/* word8, S + A (GNU extension) */
+    R_386_PC8 = 23,		/* word8, S + A - P (GNU extension) */
+    R_386_TLS_GD_32 = 24,	/* Direct 32 bit for GD TLS */
+    R_386_TLS_GD_PUSH = 25,	/* Tag for pushl in GD TLS code */
+    R_386_TLS_GD_CALL = 26,	/* Relocation for call to */
+    R_386_TLS_GD_POP = 27,	/* Tag for popl in GD TLS code */
+    R_386_TLS_LDM_32 = 28,	/* Direct 32 bit for local dynamic code */
+    R_386_TLS_LDM_PUSH = 29,	/* Tag for pushl in LDM TLS code */
+    R_386_TLS_LDM_CALL = 30,	/* Relocation for call to */
+    R_386_TLS_LDM_POP = 31,	/* Tag for popl in LDM TLS code */
+    R_386_TLS_LDO_32 = 32,	/* Offset relative to TLS block */
+    R_386_TLS_IE_32 = 33,	/* GOT entry for static TLS block */
+    R_386_TLS_LE_32 = 34,	/* Offset relative to static TLS block */
+    R_386_TLS_DTPMOD32 = 35,	/* ID of module containing symbol */
+    R_386_TLS_DTPOFF32 = 36,	/* Offset in TLS block */
+    R_386_TLS_TPOFF32 = 37	/* Offset in static TLS block */
 } elf_386_relocation_type;
 
 typedef enum {
     R_X86_64_NONE = 0,		/* none */
-    R_X86_64_64 = 1,		/* add 64-bit symbol value */
-    R_X86_64_PC32 = 2,		/* pc-relative 32bit signed sym value */
-    R_X86_64_GOT32 = 3,		/* pc-relative 32bit signed GOT offset */
-    R_X86_64_PLT32 = 4,		/* pc-relative 32bit signed PLT offset */
-    R_X86_64_COPY = 5,		/* Copy data from shared object */
-    R_X86_64_GLOB_DAT = 6,	/* Set GOT entry to data address */
-    R_X86_64_JMP_SLOT = 7,	/* Set GOT entry to code address */
-    R_X86_64_RELATIVE = 8,	/* Add load address of shared object */
-    R_X86_64_GOTPCREL = 9,	/* Add 32bit signed pcrel offset to GOT */
-    R_X86_64_32 = 10,		/* Add 32bit zero extended (zx) symbol value */
-    R_X86_64_32S = 11,		/* Add 32bit sign extended (sx) symbol value */
-    R_X86_64_16 = 12,		/* Add 16bit zx symbol value */
-    R_X86_64_PC16 = 13,		/* Add 16bit sx pc relative symbol value */
-    R_X86_64_8 = 14,		/* Add 8bit zx symbol value */
-    R_X86_64_PC8 = 15		/* Add 8bit sx pc relative symbol value */
+    R_X86_64_64 = 1,		/* word64, S + A */
+    R_X86_64_PC32 = 2,		/* word32, S + A - P */
+    R_X86_64_GOT32 = 3,		/* word32, G + A */
+    R_X86_64_PLT32 = 4,		/* word32, L + A - P */
+    R_X86_64_COPY = 5,		/* none */
+    R_X86_64_GLOB_DAT = 6,	/* word64, S, set GOT entry to data address */
+    R_X86_64_JMP_SLOT = 7,	/* word64, S, set GOT entry to code address */
+    R_X86_64_RELATIVE = 8,	/* word64, B + A */
+    R_X86_64_GOTPCREL = 9,	/* word32, G + GOT + A - P */
+    R_X86_64_32 = 10,		/* word32 (zero extend), S + A */
+    R_X86_64_32S = 11,		/* word32 (sign extend), S + A */
+    R_X86_64_16 = 12,		/* word16, S + A */
+    R_X86_64_PC16 = 13,		/* word16, S + A - P */
+    R_X86_64_8 = 14,		/* word8, S + A */
+    R_X86_64_PC8 = 15,		/* word8, S + A - P */
+    R_X86_64_DPTMOD64 = 16,	/* word64, ID of module containing symbol */
+    R_X86_64_DTPOFF64 = 17,	/* word64, offset in TLS block */
+    R_X86_64_TPOFF64 = 18,	/* word64, offset in initial TLS block */
+    R_X86_64_TLSGD = 19,	/* word32, PC-rel offset to GD GOT block */
+    R_X86_64_TLSLD = 20,	/* word32, PC-rel offset to LD GOT block */
+    R_X86_64_DTPOFF32 = 21,	/* word32, offset to TLS block */
+    R_X86_64_GOTTPOFF = 22,	/* word32, PC-rel offset to IE GOT entry */
+    R_X86_64_TPOFF32 = 23	/* word32, offset in initial TLS block */
 } elf_x86_64_relocation_type;
 
 struct elf_secthead {
diff --git a/modules/objfmts/elf/tests/Makefile.inc b/modules/objfmts/elf/tests/Makefile.inc
index 82b9ea2d..100cca0d 100644
--- a/modules/objfmts/elf/tests/Makefile.inc
+++ b/modules/objfmts/elf/tests/Makefile.inc
@@ -25,8 +25,9 @@ EXTRA_DIST += modules/objfmts/elf/tests/elfglobal.hex
 EXTRA_DIST += modules/objfmts/elf/tests/elfglobext.asm
 EXTRA_DIST += modules/objfmts/elf/tests/elfglobext.errwarn
 EXTRA_DIST += modules/objfmts/elf/tests/elfglobext.hex
-EXTRA_DIST += modules/objfmts/elf/tests/elfreloc-err.asm
-EXTRA_DIST += modules/objfmts/elf/tests/elfreloc-err.errwarn
+EXTRA_DIST += modules/objfmts/elf/tests/elfreloc-ext.asm
+EXTRA_DIST += modules/objfmts/elf/tests/elfreloc-ext.errwarn
+EXTRA_DIST += modules/objfmts/elf/tests/elfreloc-ext.hex
 EXTRA_DIST += modules/objfmts/elf/tests/elfabssect.asm
 EXTRA_DIST += modules/objfmts/elf/tests/elfabssect.errwarn
 EXTRA_DIST += modules/objfmts/elf/tests/elfabssect.hex
diff --git a/modules/objfmts/elf/tests/elfreloc-err.errwarn b/modules/objfmts/elf/tests/elfreloc-err.errwarn
deleted file mode 100644
index 45779b88..00000000
--- a/modules/objfmts/elf/tests/elfreloc-err.errwarn
+++ /dev/null
@@ -1,2 +0,0 @@
--:3: elf: invalid relocation size
--:4: elf: invalid relocation size
diff --git a/modules/objfmts/elf/tests/elfreloc-err.asm b/modules/objfmts/elf/tests/elfreloc-ext.asm
similarity index 100%
rename from modules/objfmts/elf/tests/elfreloc-err.asm
rename to modules/objfmts/elf/tests/elfreloc-ext.asm
diff --git a/modules/objfmts/elf/tests/elfreloc-ext.errwarn b/modules/objfmts/elf/tests/elfreloc-ext.errwarn
new file mode 100644
index 00000000..e69de29b
diff --git a/modules/objfmts/elf/tests/elfreloc-ext.hex b/modules/objfmts/elf/tests/elfreloc-ext.hex
new file mode 100644
index 00000000..4c1fce85
--- /dev/null
+++ b/modules/objfmts/elf/tests/elfreloc-ext.hex
@@ -0,0 +1,464 @@
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