Module Name: src
Committed By: matt
Date: Thu Mar 6 07:48:25 UTC 2014
Modified Files:
src/sys/arch/powerpc/include: elf_machdep.h
Log Message:
More comments.
rest of powerpc64 relocs
To generate a diff of this commit:
cvs rdiff -u -r1.9 -r1.10 src/sys/arch/powerpc/include/elf_machdep.h
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/arch/powerpc/include/elf_machdep.h
diff -u src/sys/arch/powerpc/include/elf_machdep.h:1.9 src/sys/arch/powerpc/include/elf_machdep.h:1.10
--- src/sys/arch/powerpc/include/elf_machdep.h:1.9 Sat Jan 15 10:00:07 2011
+++ src/sys/arch/powerpc/include/elf_machdep.h Thu Mar 6 07:48:25 2014
@@ -1,4 +1,7 @@
-/* $NetBSD: elf_machdep.h,v 1.9 2011/01/15 10:00:07 matt Exp $ */
+/* $NetBSD: elf_machdep.h,v 1.10 2014/03/06 07:48:25 matt Exp $ */
+
+#ifndef _POWERPC_ELF_MACHDEP_H_
+#define _POWERPC_ELF_MACHDEP_H_
#define ELF32_MACHDEP_ENDIANNESS ELFDATA2MSB
#define ELF32_MACHDEP_ID_CASES \
@@ -22,84 +25,179 @@
/* Specify the value of _GLOBAL_OFFSET_TABLE_ */
#define DT_PPC_GOT DT_LOPROC
+// A = the addend used to compute the value of relocatable field
+// B = the base address of the shared object
+// G = offset into the global offset table
+// L = section offset or address of the procedure link table entry for the
+// symbol + addend
+// M = similar to G except the address which is stored may be the address of
+// the procedure linkage table entry for the symbol
+// P = the place (section offset or address) of the storage unit being
+// relocated (computed using r_offset)
+// R = the offset of the symbol with the section in which the symbol is defined
+// S = the value of the symbol whose index resides in the relocation entry
+//
+// @dtpmod
+// Computes the load module index of the load module that contains the
+// definition of sym. The addend, if present, is ignored.
+// @dtprel
+// Computes a dtv-relative displacement, the difference between the value of
+// S + A and the base address of the thread-local storage block that contains
+// the definition of the symbol, minus 0x8000.
+// @tprel
+// Computes a tp-relative displacement, the difference between the value of
+// S + A and the value of the thread pointer (r13).
+// @got@tlsgd
+// Allocates two contiguous entries in the GOT to hold a tls_index structure,
+// with values @dtpmod and @dtprel, and computes the offset to the first
+// entry relative to the TOC base (r2).
+// @got@tlsld
+// Allocates two contiguous entries in the GOT to hold a tls_index structure,
+// with values @dtpmod and zero, and computes the offset to the first entry
+// relative to the TOC base (r2).
+// @got@dtprel
+// Allocates an entry in the GOT with value @dtprel, and computes the offset
+// to the entry relative to the TOC base (r2).
+// @got@tprel
+// Allocates an entry in the GOT with value @tprel, and computes the offset
+// to the entry relative to the TOC base (r2).
+//
+// #lo(x) = (x & 0xffff)
+// #hi(x) = ((x >> 16) & 0xffff)
+// #ha(x) = (((x >> 16) + ((x & 0x80000) == 0x8000)) & 0xffff)
+// #higher(x) = ((x >> 32) & 0xffff)
+// #highera(x) =
+// (((x >> 32) + ((x & 0xffff8000) == 0xffff8000)) & 0xffff)
+// #highest(x) = ((x >> 48) & 0xffff)
+// #highesta(x) =
+// (((x >> 48) + ((x & 0xffffffff8000) == 0xffffffff8000)) & 0xffff)
+// .TOC. = base TOC base of TOC section for object being relocated
+
#define R_PPC_NONE 0
-#define R_PPC_32 1
-#define R_PPC_24 2
-#define R_PPC_16 3
-#define R_PPC_16_LO 4
-#define R_PPC_16_HI 5 /* R_PPC_ADDIS */
-#define R_PPC_16_HA 6
-#define R_PPC_14 7
-#define R_PPC_14_TAKEN 8
-#define R_PPC_14_NTAKEN 9
-#define R_PPC_REL24 10 /* R_PPC_BRANCH */
-#define R_PPC_REL14 11
-#define R_PPC_REL14_TAKEN 12
-#define R_PPC_REL14_NTAKEN 13
-#define R_PPC_GOT16 14
-#define R_PPC_GOT16_LO 15
-#define R_PPC_GOT16_HI 16
-#define R_PPC_GOT16_HA 17
-#define R_PPC_PLT24 18
-#define R_PPC_COPY 19
-#define R_PPC_GLOB_DAT 20
+#define R_PPC_ADDR32 1 // S + A
+#define R_PPC_ADDR24 2 // (S + A) >> 2
+#define R_PPC_ADDR16 3 // S + A
+#define R_PPC_ADDR16_LO 4 // #lo(S + A)
+#define R_PPC_ADDR16_HI 5 // #hi(S + A)
+#define R_PPC_ADDR16_HA 6 // #ha(S + A)
+#define R_PPC_ADDR14 7 // (S + A) >> 2
+#define R_PPC_ADDR14_TAKEN 8 // (S + A) >> 2
+#define R_PPC_ADDR14_NTAKEN 9 // (S + A) >> 2
+#define R_PPC_REL24 10 // (S + A - P) >> 2
+#define R_PPC_REL14 11 // (S + A - P) >> 2
+#define R_PPC_REL14_TAKEN 12 // (S + A - P) >> 2
+#define R_PPC_REL14_NTAKEN 13 // (S + A - P) >> 2
+#define R_PPC_GOT16 14 // G + A
+#define R_PPC_GOT16_LO 15 // #lo(G + A)
+#define R_PPC_GOT16_HI 16 // #hi(G + A)
+#define R_PPC_GOT16_HA 17 // #ha(G + A)
+#define R_PPC_PLTREL24 18 // (L + A - P) >> 2
+#define R_PPC_COPY 19 // none
+#define R_PPC_GLOB_DAT 20 // S + A
#define R_PPC_JMP_SLOT 21
-#define R_PPC_RELATIVE 22
-#define R_PPC_LOCAL24PC 23
-#define R_PPC_U32 24
-#define R_PPC_U16 25
-#define R_PPC_REL32 26
-#define R_PPC_PLT32 27
-#define R_PPC_PLTREL32 28
-#define R_PPC_PLT16_LO 29
-#define R_PPC_PLT16_HI 30
-#define R_PPC_PLT16_HA 31
-#define R_PPC_SDAREL16 32
-#define R_PPC_SECTOFF 33
-#define R_PPC_SECTOFF_LO 34
-#define R_PPC_SECTOFF_HI 35
-#define R_PPC_SECTOFF_HA 36
-#define R_PPC_ADDR30 37
+#define R_PPC_RELATIVE 22 // B + A
+#define R_PPC_LOCAL24PC 23 // (see R_PPC_REL24)
+#define R_PPC_UADDR32 24 // S + A
+#define R_PPC_UADDR16 25 // S + A
+#define R_PPC_REL32 26 // S + A - P
+#define R_PPC_PLT32 27 // L
+#define R_PPC_PLTREL 28 // L - P
+#define R_PPC_PLT16_LO 29 // #lo(L)
+#define R_PPC_PLT16_HI 30 // #hi(L)
+#define R_PPC_PLT16_HA 31 // #ha(L)
+#define R_PPC_SDAREL16 32 // S + A - _SDA_BASE_
+#define R_PPC_SECTOFF 33 // R + A
+#define R_PPC_SECTOFF_LO 34 // #lo(R + A)
+#define R_PPC_SECTOFF_HI 35 // #lo(R + A)
+#define R_PPC_SECTOFF_HA 36 // #ha(R + A)
+#define R_PPC_ADDR30 37 // (S + A - P) >> 2
+/* PPC64 relocations */
+#define R_PPC_ADDR64 38 // S + A
+#define R_PPC_ADDR16_HIGHER 39 // #higher(S + A)
+#define R_PPC_ADDR16_HIGHERA 40 // #highera(S + A)
+#define R_PPC_ADDR16_HIGHEST 41 // #highest(S + A)
+#define R_PPC_ADDR16_HIGHESTA 42 // #highesta(S + A)
+#define R_PPC_UADDR64 43 // S + A
+#define R_PPC_REL64 44 // S + A - P
+#define R_PPC_PLT64 45 // L
+#define R_PPC_PLTREL4 46 // L - P
+#define R_PPC_TOC16 47 // S + A - .TOC.
+#define R_PPC_TOC16_LO 48 // #lo(S + A - .TOC.)
+#define R_PPC_TOC16_HI 49 // #lo(S + A - .TOC.)
+#define R_PPC_TOC16_HA 50 // #ha(S + A - .TOC.)
+#define R_PPC_TOC 51 // .TOC.
+#define R_PPC_PLTGOT16 52 // M
+#define R_PPC_PLTGOT16_LO 53 // #lo(M)
+#define R_PPC_PLTGOT16_HI 54 // #lo(M)
+#define R_PPC_PLTGOT16_HA 55 // #ha(M)
+#define R_PPC_ADDR16_DS 56 // (S + A) >> 2
+#define R_PPC_ADDR16_LO_DS 57 // #lo(S + A) >> 2
+#define R_PPC_GOT16_DS 58 // G >> 2
+#define R_PPC_GOT16_LO_DS 59 // #lo(G) >> 2
+#define R_PPC_PLT16_LO_DS 60 // #lo(L) >> 2
+#define R_PPC_SECTOFF16_DS 61 // (R + A) >> 2
+#define R_PPC_SECTOFF16_LO_DS 62 // #lo(R + A) >> 2
+#define R_PPC_TOC16_DS 63 // (S + A - .TOC.) >> 2
+#define R_PPC_TOC16_LO_DS 64 // #lo(S + A - .TOC.) >> 2
+#define R_PPC_PLTGOT16_DS 65 // M >> 2
+#define R_PPC_PLTGOT16_LO_DS 66 // #lo(M) >> 2
/* TLS relocations */
-#define R_PPC_TLS 67
+#define R_PPC_TLS 67 // none
-#define R_PPC_DTPMOD32 68
-#define R_PPC_TPREL16 69
-#define R_PPC_TPREL16_LO 70
-#define R_PPC_TPREL16_HI 71
-#define R_PPC_TPREL16_HA 72
-#define R_PPC_TPREL32 73
-#define R_PPC_DTPREL16 74
-#define R_PPC_DTPREL16_LO 75
-#define R_PPC_DTPREL16_HI 76
-#define R_PPC_DTPREL16_HA 77
-#define R_PPC_DTPREL32 78
-
-#define R_PPC_GOT_TLSGD16 79
-#define R_PPC_GOT_TLSGD16_LO 80
-#define R_PPC_GOT_TLSGD16_HI 81
-#define R_PPC_GOT_TLSGD16_HA 82
-#define R_PPC_GOT_TLSLD16 83
-#define R_PPC_GOT_TLSLD16_LO 84
-#define R_PPC_GOT_TLSLD16_HI 85
-#define R_PPC_GOT_TLSLD16_HA 86
-
-#define R_PPC_GOT_TPREL16 87
-#define R_PPC_GOT_TPREL16_LO 88
-#define R_PPC_GOT_TPREL16_HI 89
-#define R_PPC_GOT_TPREL16_HA 90
-#define R_PPC_GOT_DTPREL16 91
-#define R_PPC_GOT_DTPREL16_LO 92
-#define R_PPC_GOT_DTPREL16_HI 93
-#define R_PPC_GOT_DTPREL16_HA 94
+#define R_PPC_DTPMOD 68
+#define R_PPC_TPREL16 69 // @tprel
+#define R_PPC_TPREL16_LO 70 // #lo(@tprel)
+#define R_PPC_TPREL16_HI 71 // #hi(@tprel)
+#define R_PPC_TPREL16_HA 72 // #ha(@tprel)
+#define R_PPC_TPREL 73 // @tprel
+#define R_PPC_DTPREL16 74 // @got@dtprel
+#define R_PPC_DTPREL16_LO 75 // #lo(@dtprel)
+#define R_PPC_DTPREL16_HI 76 // #hi(@dtprel)
+#define R_PPC_DTPREL16_HA 77 // #ha(@dtprel)
+#define R_PPC_DTPREL 78 // @dtprel
+
+#define R_PPC_GOT_TLSGD16 79 // @got@tlsgd
+#define R_PPC_GOT_TLSGD16_LO 80 // #lo(@got@tlsgd)
+#define R_PPC_GOT_TLSGD16_HI 81 // #hi(@got@tlsgd)
+#define R_PPC_GOT_TLSGD16_HA 82 // #ha(@got@tlsgd)
+#define R_PPC_GOT_TLSLD16 83 // @got@tlsld
+#define R_PPC_GOT_TLSLD16_LO 84 // #lo(@got@tlsld)
+#define R_PPC_GOT_TLSLD16_HI 85 // #hi(@got@tlsld)
+#define R_PPC_GOT_TLSLD16_HA 86 // #ha(@got@tlsld)
+
+#define R_PPC_GOT_TPREL16 87 // @got@tprel
+#define R_PPC_GOT_TPREL16_LO 88 // #lo(@got@tprel)
+#define R_PPC_GOT_TPREL16_HI 89 // #hi(@got@tprel)
+#define R_PPC_GOT_TPREL16_HA 90 // #ha(@got@tprel)
+#define R_PPC_GOT_DTPREL16 91 // @got@dtprel
+#define R_PPC_GOT_DTPREL16_LO 92 // #lo(@got@dtprel)
+#define R_PPC_GOT_DTPREL16_HI 93 // #hi(@got@dtprel)
+#define R_PPC_GOT_DTPREL16_HA 94 // #ha(@got@dtprel)
#define R_PPC_TLSGD 95
#define R_PPC_TLSLD 96
+/* PPC64 relocations */
+#define R_PPC_TPREL16_DS 95 // @tprel
+#define R_PPC_TPREL16_LO_DS 96 // #lo(@tprel)
+#define R_PPC_TPREL16_HIGHER 97 // #higher(@tprel)
+#define R_PPC_TPREL16_HIGHERA 98 // #highera(@tprel)
+#define R_PPC_TPREL16_HIGHEST 99 // #highest(@tprel)
+#define R_PPC_TPREL16_HIGHESTA 100 // #highesta(@tprel)
+
+#define R_PPC_DTPREL16_DS 101 // @dtprel
+#define R_PPC_DTPREL16_LO_DS 102 // #lo(@dtprel)
+#define R_PPC_DTPREL16_HIGHER 103 // #higher(@dtprel)
+#define R_PPC_DTPREL16_HIGHERA 104 // #highera(@dtprel)
+#define R_PPC_DTPREL16_HIGHEST 105 // #highest(@dtprel)
+#define R_PPC_DTPREL16_HIGHESTA 106 // #highesta(@dtprel)
+
/* Used for the secure-plt PIC code sequences */
-#define R_PPC_REL16 249
-#define R_PPC_REL16_LO 250
-#define R_PPC_REL16_HI 251
-#define R_PPC_REL16_HA 252
+#define R_PPC_REL16 249 // S + A - P
+#define R_PPC_REL16_LO 250 // #lo(S + A - P)
+#define R_PPC_REL16_HI 251 // #hi(S + A - P)
+#define R_PPC_REL16_HA 252 // #ha(S + A - P)
#define R_TYPE(name) __CONCAT(R_PPC_,name)
+
+#endif /* _POWERPC_ELF_MACHDEP_H_ */
