[PATCH v2 1/4] Nios II port submission, elf subdir
Chung-Lin Tang
chunglin_tang@mentor.com
Fri Apr 18 10:23:00 GMT 2014
This is an update of the Nios II port submission, with changes to
address what Joseph pointed out in the first round of review.
The issue of removing divide in the dynamic linker was dealt with in my
previous patch:
http://sourceware.org/ml/libc-alpha/2014-04/msg00187.html
although I have not received conclusive approval yet. Note that the
current nios2 port patches has all that code related to that inline
divide routine removed, so I'm assuming that dynamic linker change will
be applied (sooner or later).
The current resulting patch for elf/ is mainly to add the Nios II
relocations with comments.
Thanks,
Chung-Lin
2014-04-18 Chung-Lin Tang <cltang@codesourcery.com>
Sandra Loosemore <sandra@codesourcery.com>
Andrew Jenner <andrew@codesourcery.com>
Joseph Myers <joseph@codesourcery.com>
Nathan Sidwell <nathan@codesourcery.com>
* elf/elf.h (EM_ALTERA_NIOS2): New machine number for Altera
Nios II.
(DT_NIOS2_GP): New dynamic entry type for Nios II _gp address.
(R_NIOS2_NONE,R_NIOS2_S16,R_NIOS2_U16): Define Nios II relocations.
(R_NIOS2_PCREL16,R_NIOS2_CALL26,R_NIOS2_IMM5): Likewise.
(R_NIOS2_CACHE_OPX,R_NIOS2_IMM6,R_NIOS2_IMM8,R_NIOS2_HI16):
Likewise.
(R_NIOS2_LO16,R_NIOS2_HIADJ16,R_NIOS2_BFD_RELOC_32): Likewise.
(R_NIOS2_BFD_RELOC_16,R_NIOS2_BFD_RELOC_8,R_NIOS2_GPREL): Likewise.
(R_NIOS2_GNU_VTINHERIT,R_NIOS2_GNU_VTENTRY,R_NIOS2_UJMP): Likewise.
(R_NIOS2_CJMP,R_NIOS2_CALLR,R_NIOS2_ALIGN,R_NIOS2_GOT16): Likewise.
(R_NIOS2_CALL16,R_NIOS2_GOTOFF_LO,R_NIOS2_GOTOFF_HA): Likewise.
(R_NIOS2_PCREL_LO,R_NIOS2_PCREL_HA,R_NIOS2_TLS_GD16): Likewise.
(R_NIOS2_TLS_LDM16,R_NIOS2_TLS_LDO16,R_NIOS2_TLS_IE16): Likewise.
(R_NIOS2_TLS_LE16,R_NIOS2_TLS_DTPMOD,R_NIOS2_TLS_DTPREL): Likewise.
(R_NIOS2_TLS_TPREL,R_NIOS2_COPY,R_NIOS2_GLOB_DAT): Likewise.
(R_NIOS2_JUMP_SLOT,R_NIOS2_RELATIVE,R_NIOS2_GOTOFF): Likewise.
(R_NIOS2_CALL26_NOAT,R_NIOS2_GOT_LO,R_NIOS2_GOT_HA): Likewise.
(R_NIOS2_CALL_LO,R_NIOS2_CALL_HA): Likewise.
-------------- next part --------------
diff --git a/elf/elf.h b/elf/elf.h
index 40e87b2..558fb9c 100644
--- a/elf/elf.h
+++ b/elf/elf.h
@@ -249,6 +249,7 @@ typedef struct
#define EM_OPENRISC 92 /* OpenRISC 32-bit embedded processor */
#define EM_ARC_A5 93 /* ARC Cores Tangent-A5 */
#define EM_XTENSA 94 /* Tensilica Xtensa Architecture */
+#define EM_ALTERA_NIOS2 113 /* Altera Nios II */
#define EM_AARCH64 183 /* ARM AARCH64 */
#define EM_TILEPRO 188 /* Tilera TILEPro */
#define EM_MICROBLAZE 189 /* Xilinx MicroBlaze */
@@ -3132,6 +3133,58 @@ typedef Elf32_Addr Elf32_Conflict;
#define R_MICROBLAZE_TLSGOTTPREL32 28 /* TLS Offset From Thread Pointer. */
#define R_MICROBLAZE_TLSTPREL32 29 /* TLS Offset From Thread Pointer. */
+/* Legal values for d_tag (dynamic entry type). */
+#define DT_NIOS2_GP 0x70000002 /* Address of _gp. */
+
+/* Nios II relocations. */
+#define R_NIOS2_NONE 0 /* No reloc. */
+#define R_NIOS2_S16 1 /* Direct signed 16 bit. */
+#define R_NIOS2_U16 2 /* Direct unsigned 16 bit. */
+#define R_NIOS2_PCREL16 3 /* PC relative 16 bit. */
+#define R_NIOS2_CALL26 4 /* Direct call. */
+#define R_NIOS2_IMM5 5 /* 5 bit constant expression. */
+#define R_NIOS2_CACHE_OPX 6 /* 5 bit expression, shift 22. */
+#define R_NIOS2_IMM6 7 /* 6 bit constant expression. */
+#define R_NIOS2_IMM8 8 /* 8 bit constant expression. */
+#define R_NIOS2_HI16 9 /* High 16 bit. */
+#define R_NIOS2_LO16 10 /* Low 16 bit. */
+#define R_NIOS2_HIADJ16 11 /* High 16 bit, adjusted. */
+#define R_NIOS2_BFD_RELOC_32 12 /* 32 bit symbol value + addend. */
+#define R_NIOS2_BFD_RELOC_16 13 /* 16 bit symbol value + addend. */
+#define R_NIOS2_BFD_RELOC_8 14 /* 8 bit symbol value + addend. */
+#define R_NIOS2_GPREL 15 /* 16 bit GP pointer offset. */
+#define R_NIOS2_GNU_VTINHERIT 16 /* GNU C++ vtable hierarchy. */
+#define R_NIOS2_GNU_VTENTRY 17 /* GNU C++ vtable member usage. */
+#define R_NIOS2_UJMP 18 /* Unconditional branch. */
+#define R_NIOS2_CJMP 19 /* Conditional branch. */
+#define R_NIOS2_CALLR 20 /* Indirect call through register. */
+#define R_NIOS2_ALIGN 21 /* Alignment requirement for
+ linker relaxation. */
+#define R_NIOS2_GOT16 22 /* 16 bit GOT entry. */
+#define R_NIOS2_CALL16 23 /* 16 bit GOT entry for function. */
+#define R_NIOS2_GOTOFF_LO 24 /* %lo of offset to GOT pointer. */
+#define R_NIOS2_GOTOFF_HA 25 /* %hiadj of offset to GOT pointer. */
+#define R_NIOS2_PCREL_LO 26 /* %lo of PC relative offset. */
+#define R_NIOS2_PCREL_HA 27 /* %hiadj of PC relative offset. */
+#define R_NIOS2_TLS_GD16 28 /* 16 bit GOT offset for TLS GD. */
+#define R_NIOS2_TLS_LDM16 29 /* 16 bit GOT offset for TLS LDM. */
+#define R_NIOS2_TLS_LDO16 30 /* 16 bit module relative offset. */
+#define R_NIOS2_TLS_IE16 31 /* 16 bit GOT offset for TLS IE. */
+#define R_NIOS2_TLS_LE16 32 /* 16 bit LE TP-relative offset. */
+#define R_NIOS2_TLS_DTPMOD 33 /* Module number. */
+#define R_NIOS2_TLS_DTPREL 34 /* Module-relative offset. */
+#define R_NIOS2_TLS_TPREL 35 /* TP-relative offset. */
+#define R_NIOS2_COPY 36 /* Copy symbol at runtime. */
+#define R_NIOS2_GLOB_DAT 37 /* Create GOT entry. */
+#define R_NIOS2_JUMP_SLOT 38 /* Create PLT entry. */
+#define R_NIOS2_RELATIVE 39 /* Adjust by program base. */
+#define R_NIOS2_GOTOFF 40 /* 16 bit offset to GOT pointer. */
+#define R_NIOS2_CALL26_NOAT 41 /* Direct call in .noat section. */
+#define R_NIOS2_GOT_LO 42 /* %lo() of GOT entry. */
+#define R_NIOS2_GOT_HA 43 /* %hiadj() of GOT entry. */
+#define R_NIOS2_CALL_LO 44 /* %lo() of function GOT entry. */
+#define R_NIOS2_CALL_HA 45 /* %hiadj() of function GOT entry. */
+
/* TILEPro relocations. */
#define R_TILEPRO_NONE 0 /* No reloc */
#define R_TILEPRO_32 1 /* Direct 32 bit */
More information about the Libc-alpha
mailing list