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authorRichard Henderson <rth@redhat.com>2001-09-05 03:00:14 +0000
committerRichard Henderson <rth@redhat.com>2001-09-05 03:00:14 +0000
commitdfe57ca0af6d87c88e4962ee5b2b9ee14d990240 (patch)
tree3eb2f9d9bfa7c5d5bdc7beec557de9b326a9c774 /bfd
parente3883bf957e3a9857b5cc6b82c096e5fb5992b27 (diff)
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* elf64-alpha.c (SKIP_HOWTO): New.
(elf64_alpha_howto_table): Use it to remove dead ECOFF relocs. Fix sizes of 16-bit mem format relocs. (elf64_alpha_reloc_map): Update to match. (elf64_alpha_relax_with_lituse): Use GPREL16 as appropriate. (elf64_alpha_relax_without_lituse): Likewise. (elf64_alpha_check_relocs): Handle GPREL16. (elf64_alpha_relocate_section): Likewise. * reloc.c (BFD_RELOC_ALPHA_USER_*): Remove. (BFD_RELOC_ALPHA_GPREL_HI16, BFD_RELOC_ALPHA_GPREL_LO16): New. * bfd-in2.h, libbfd.h: Rebuild.
Diffstat (limited to 'bfd')
-rw-r--r--bfd/ChangeLog14
-rw-r--r--bfd/bfd-in2.h20
-rw-r--r--bfd/elf64-alpha.c239
-rw-r--r--bfd/libbfd.h9
-rw-r--r--bfd/reloc.c29
5 files changed, 74 insertions, 237 deletions
diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index 658e713..ffc81da 100644
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,3 +1,17 @@
+2001-09-04 Richard Henderson <rth@redhat.com>
+
+ * elf64-alpha.c (SKIP_HOWTO): New.
+ (elf64_alpha_howto_table): Use it to remove dead ECOFF relocs.
+ Fix sizes of 16-bit mem format relocs.
+ (elf64_alpha_reloc_map): Update to match.
+ (elf64_alpha_relax_with_lituse): Use GPREL16 as appropriate.
+ (elf64_alpha_relax_without_lituse): Likewise.
+ (elf64_alpha_check_relocs): Handle GPREL16.
+ (elf64_alpha_relocate_section): Likewise.
+ * reloc.c (BFD_RELOC_ALPHA_USER_*): Remove.
+ (BFD_RELOC_ALPHA_GPREL_HI16, BFD_RELOC_ALPHA_GPREL_LO16): New.
+ * bfd-in2.h, libbfd.h: Rebuild.
+
2001-09-04 Jeff Law <law@redhat.com>
* elf32-h8300.c (elf32_h8_relax_section): New function.
diff --git a/bfd/bfd-in2.h b/bfd/bfd-in2.h
index 6467453..148fcaa 100644
--- a/bfd/bfd-in2.h
+++ b/bfd/bfd-in2.h
@@ -2017,24 +2017,11 @@ as the absolute section symbol), and the "addend" indicates the type
of instruction using the register:
1 - "memory" fmt insn
2 - byte-manipulation (byte offset reg)
-3 - jsr (target of branch)
-
-The GNU linker currently doesn't do any of this optimizing. */
+3 - jsr (target of branch) */
BFD_RELOC_ALPHA_LITERAL,
BFD_RELOC_ALPHA_ELF_LITERAL,
BFD_RELOC_ALPHA_LITUSE,
-/* The BFD_RELOC_ALPHA_USER_* relocations are used by the assembler to
-process the explicit !<reloc>!sequence relocations, and are mapped
-into the normal relocations at the end of processing. */
- BFD_RELOC_ALPHA_USER_LITERAL,
- BFD_RELOC_ALPHA_USER_LITUSE_BASE,
- BFD_RELOC_ALPHA_USER_LITUSE_BYTOFF,
- BFD_RELOC_ALPHA_USER_LITUSE_JSR,
- BFD_RELOC_ALPHA_USER_GPDISP,
- BFD_RELOC_ALPHA_USER_GPRELHIGH,
- BFD_RELOC_ALPHA_USER_GPRELLOW,
-
/* The HINT relocation indicates a value that should be filled into the
"hint" field of a jmp/jsr/ret instruction, for possible branch-
prediction logic which may be provided on some processors. */
@@ -2048,6 +2035,11 @@ which is filled by the linker. */
which is filled by the linker. */
BFD_RELOC_ALPHA_CODEADDR,
+/* The GPREL_HI/LO relocations together form a 32-bit offset from the
+GP register. */
+ BFD_RELOC_ALPHA_GPREL_HI16,
+ BFD_RELOC_ALPHA_GPREL_LO16,
+
/* Bits 27..2 of the relocation address shifted right 2 bits;
simple reloc otherwise. */
BFD_RELOC_MIPS_JMP,
diff --git a/bfd/elf64-alpha.c b/bfd/elf64-alpha.c
index 085d09b..acd514c 100644
--- a/bfd/elf64-alpha.c
+++ b/bfd/elf64-alpha.c
@@ -399,6 +399,9 @@ elf64_alpha_object_p (abfd)
from smaller values. Start with zero, widen, *then* decrement. */
#define MINUS_ONE (((bfd_vma)0) - 1)
+#define SKIP_HOWTO(N) \
+ HOWTO(N, 0, 0, 0, 0, 0, 0, elf64_alpha_reloc_bad, 0, 0, 0, 0, 0)
+
static reloc_howto_type elf64_alpha_howto_table[] =
{
HOWTO (R_ALPHA_NONE, /* type */
@@ -465,7 +468,7 @@ static reloc_howto_type elf64_alpha_howto_table[] =
/* Used for an instruction that refers to memory off the GP register. */
HOWTO (R_ALPHA_LITERAL, /* type */
0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
@@ -486,7 +489,7 @@ static reloc_howto_type elf64_alpha_howto_table[] =
This does not actually do any relocation. */
HOWTO (R_ALPHA_LITUSE, /* type */
0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 1, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
@@ -546,7 +549,7 @@ static reloc_howto_type elf64_alpha_howto_table[] =
/* A hint for a jump to a register. */
HOWTO (R_ALPHA_HINT, /* type */
2, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 1, /* size (0 = byte, 1 = short, 2 = long) */
14, /* bitsize */
true, /* pc_relative */
0, /* bitpos */
@@ -603,99 +606,22 @@ static reloc_howto_type elf64_alpha_howto_table[] =
MINUS_ONE, /* dst_mask */
true), /* pcrel_offset */
- /* Push a value on the reloc evaluation stack. */
- /* Not implemented -- it's dumb. */
- HOWTO (R_ALPHA_OP_PUSH, /* type */
- 0, /* rightshift */
- 0, /* size (0 = byte, 1 = short, 2 = long) */
- 0, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont, /* complain_on_overflow */
- elf64_alpha_reloc_bad, /* special_function */
- "OP_PUSH", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0, /* dst_mask */
- false), /* pcrel_offset */
-
- /* Store the value from the stack at the given address. Store it in
- a bitfield of size r_size starting at bit position r_offset. */
- /* Not implemented -- it's dumb. */
- HOWTO (R_ALPHA_OP_STORE, /* type */
- 0, /* rightshift */
- 4, /* size (0 = byte, 1 = short, 2 = long) */
- 64, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont, /* complain_on_overflow */
- elf64_alpha_reloc_bad, /* special_function */
- "OP_STORE", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- MINUS_ONE, /* dst_mask */
- false), /* pcrel_offset */
-
- /* Subtract the reloc address from the value on the top of the
- relocation stack. */
- /* Not implemented -- it's dumb. */
- HOWTO (R_ALPHA_OP_PSUB, /* type */
- 0, /* rightshift */
- 0, /* size (0 = byte, 1 = short, 2 = long) */
- 0, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont, /* complain_on_overflow */
- elf64_alpha_reloc_bad, /* special_function */
- "OP_PSUB", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0, /* dst_mask */
- false), /* pcrel_offset */
-
- /* Shift the value on the top of the relocation stack right by the
- given value. */
- /* Not implemented -- it's dumb. */
- HOWTO (R_ALPHA_OP_PRSHIFT, /* type */
- 0, /* rightshift */
- 0, /* size (0 = byte, 1 = short, 2 = long) */
- 0, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont, /* complain_on_overflow */
- elf64_alpha_reloc_bad, /* special_function */
- "OP_PRSHIFT", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0, /* dst_mask */
- false), /* pcrel_offset */
-
- /* Change the value of GP used by +r_addend until the next GPVALUE or the
- end of the input bfd. */
- /* Not implemented -- it's dumb. */
- HOWTO (R_ALPHA_GPVALUE,
- 0, /* rightshift */
- 0, /* size (0 = byte, 1 = short, 2 = long) */
- 0, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont, /* complain_on_overflow */
- elf64_alpha_reloc_bad, /* special_function */
- "GPVALUE", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0, /* dst_mask */
- false), /* pcrel_offset */
+ /* Skip 12 - 16; deprecated ECOFF relocs. */
+ SKIP_HOWTO (12),
+ SKIP_HOWTO (13),
+ SKIP_HOWTO (14),
+ SKIP_HOWTO (15),
+ SKIP_HOWTO (16),
/* The high 16 bits of the displacement from GP to the target. */
HOWTO (R_ALPHA_GPRELHIGH,
0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- elf64_alpha_reloc_bad, /* special_function */
+ 0, /* special_function */
"GPRELHIGH", /* name */
false, /* partial_inplace */
0xffff, /* src_mask */
@@ -705,12 +631,12 @@ static reloc_howto_type elf64_alpha_howto_table[] =
/* The low 16 bits of the displacement from GP to the target. */
HOWTO (R_ALPHA_GPRELLOW,
0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
- elf64_alpha_reloc_bad, /* special_function */
+ 0, /* special_function */
"GPRELLOW", /* name */
false, /* partial_inplace */
0xffff, /* src_mask */
@@ -718,89 +644,25 @@ static reloc_howto_type elf64_alpha_howto_table[] =
false), /* pcrel_offset */
/* A 16-bit displacement from the GP to the target. */
- /* XXX: Not implemented. */
- HOWTO (R_ALPHA_IMMED_GP_16,
+ HOWTO (R_ALPHA_GPREL16,
0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
0, /* special_function */
- "IMMED_GP_16", /* name */
+ "GPREL16", /* name */
false, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
- /* The high bits of a 32-bit displacement from the GP to the target; the
- low bits are supplied in the subsequent R_ALPHA_IMMED_LO32 relocs. */
- /* XXX: Not implemented. */
- HOWTO (R_ALPHA_IMMED_GP_HI32,
- 0, /* rightshift */
- 0, /* size (0 = byte, 1 = short, 2 = long) */
- 0, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont, /* complain_on_overflow */
- elf64_alpha_reloc_bad, /* special_function */
- "IMMED_GP_HI32", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0, /* dst_mask */
- false), /* pcrel_offset */
-
- /* The high bits of a 32-bit displacement to the starting address of the
- current section (the relocation target is ignored); the low bits are
- supplied in the subsequent R_ALPHA_IMMED_LO32 relocs. */
- /* XXX: Not implemented. */
- HOWTO (R_ALPHA_IMMED_SCN_HI32,
- 0, /* rightshift */
- 0, /* size (0 = byte, 1 = short, 2 = long) */
- 0, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont, /* complain_on_overflow */
- elf64_alpha_reloc_bad, /* special_function */
- "IMMED_SCN_HI32", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0, /* dst_mask */
- false), /* pcrel_offset */
-
- /* The high bits of a 32-bit displacement from the previous br, bsr, jsr
- or jmp insn (as tagged by a BRADDR or HINT reloc) to the target; the
- low bits are supplied by subsequent R_ALPHA_IMMED_LO32 relocs. */
- /* XXX: Not implemented. */
- HOWTO (R_ALPHA_IMMED_BR_HI32,
- 0, /* rightshift */
- 0, /* size (0 = byte, 1 = short, 2 = long) */
- 0, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont, /* complain_on_overflow */
- elf64_alpha_reloc_bad, /* special_function */
- "IMMED_BR_HI32", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0, /* dst_mask */
- false), /* pcrel_offset */
-
- /* The low 16 bits of a displacement calculated in a previous HI32 reloc. */
- /* XXX: Not implemented. */
- HOWTO (R_ALPHA_IMMED_LO32,
- 0, /* rightshift */
- 0, /* size (0 = byte, 1 = short, 2 = long) */
- 0, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont, /* complain_on_overflow */
- elf64_alpha_reloc_bad, /* special_function */
- "IMMED_LO32", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0, /* dst_mask */
- false), /* pcrel_offset */
+ /* Skip 20 - 23; deprecated ECOFF relocs. */
+ SKIP_HOWTO (20),
+ SKIP_HOWTO (21),
+ SKIP_HOWTO (22),
+ SKIP_HOWTO (23),
/* Misc ELF relocations. */
@@ -1003,30 +865,22 @@ struct elf_reloc_map
static const struct elf_reloc_map elf64_alpha_reloc_map[] =
{
- {BFD_RELOC_NONE, R_ALPHA_NONE},
- {BFD_RELOC_32, R_ALPHA_REFLONG},
- {BFD_RELOC_64, R_ALPHA_REFQUAD},
- {BFD_RELOC_CTOR, R_ALPHA_REFQUAD},
- {BFD_RELOC_GPREL32, R_ALPHA_GPREL32},
- {BFD_RELOC_ALPHA_ELF_LITERAL, R_ALPHA_LITERAL},
- {BFD_RELOC_ALPHA_LITUSE, R_ALPHA_LITUSE},
- {BFD_RELOC_ALPHA_GPDISP, R_ALPHA_GPDISP},
- {BFD_RELOC_23_PCREL_S2, R_ALPHA_BRADDR},
- {BFD_RELOC_ALPHA_HINT, R_ALPHA_HINT},
- {BFD_RELOC_16_PCREL, R_ALPHA_SREL16},
- {BFD_RELOC_32_PCREL, R_ALPHA_SREL32},
- {BFD_RELOC_64_PCREL, R_ALPHA_SREL64},
-
-/* The BFD_RELOC_ALPHA_USER_* relocations are used by the assembler to process
- the explicit !<reloc>!sequence relocations, and are mapped into the normal
- relocations at the end of processing. */
- {BFD_RELOC_ALPHA_USER_LITERAL, R_ALPHA_LITERAL},
- {BFD_RELOC_ALPHA_USER_LITUSE_BASE, R_ALPHA_LITUSE},
- {BFD_RELOC_ALPHA_USER_LITUSE_BYTOFF, R_ALPHA_LITUSE},
- {BFD_RELOC_ALPHA_USER_LITUSE_JSR, R_ALPHA_LITUSE},
- {BFD_RELOC_ALPHA_USER_GPDISP, R_ALPHA_GPDISP},
- {BFD_RELOC_ALPHA_USER_GPRELHIGH, R_ALPHA_GPRELHIGH},
- {BFD_RELOC_ALPHA_USER_GPRELLOW, R_ALPHA_GPRELLOW},
+ {BFD_RELOC_NONE, R_ALPHA_NONE},
+ {BFD_RELOC_32, R_ALPHA_REFLONG},
+ {BFD_RELOC_64, R_ALPHA_REFQUAD},
+ {BFD_RELOC_CTOR, R_ALPHA_REFQUAD},
+ {BFD_RELOC_GPREL32, R_ALPHA_GPREL32},
+ {BFD_RELOC_ALPHA_ELF_LITERAL, R_ALPHA_LITERAL},
+ {BFD_RELOC_ALPHA_LITUSE, R_ALPHA_LITUSE},
+ {BFD_RELOC_ALPHA_GPDISP, R_ALPHA_GPDISP},
+ {BFD_RELOC_23_PCREL_S2, R_ALPHA_BRADDR},
+ {BFD_RELOC_ALPHA_HINT, R_ALPHA_HINT},
+ {BFD_RELOC_16_PCREL, R_ALPHA_SREL16},
+ {BFD_RELOC_32_PCREL, R_ALPHA_SREL32},
+ {BFD_RELOC_64_PCREL, R_ALPHA_SREL64},
+ {BFD_RELOC_ALPHA_GPREL_HI16, R_ALPHA_GPRELHIGH},
+ {BFD_RELOC_ALPHA_GPREL_LO16, R_ALPHA_GPRELLOW},
+ {BFD_RELOC_GPREL16, R_ALPHA_GPREL16},
};
/* Given a BFD reloc type, return a HOWTO structure. */
@@ -1205,7 +1059,7 @@ elf64_alpha_relax_with_lituse (info, symval, irel, irelend)
register from the literal insn. Leave the offset alone. */
insn = (insn & 0xffe0ffff) | (lit_insn & 0x001f0000);
urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
- R_ALPHA_GPRELLOW);
+ R_ALPHA_GPREL16);
urel->r_addend = irel->r_addend;
info->changed_relocs = true;
@@ -1442,7 +1296,7 @@ elf64_alpha_relax_without_lituse (info, symval, irel)
bfd_put_32 (info->abfd, insn, info->contents + irel->r_offset);
info->changed_contents = true;
- irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), R_ALPHA_GPRELLOW);
+ irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), R_ALPHA_GPREL16);
info->changed_relocs = true;
/* Reduce the use count on this got entry by one, possibly
@@ -2539,6 +2393,7 @@ elf64_alpha_check_relocs (abfd, info, sec, relocs)
/* FALLTHRU */
case R_ALPHA_GPDISP:
+ case R_ALPHA_GPREL16:
case R_ALPHA_GPREL32:
case R_ALPHA_GPRELHIGH:
case R_ALPHA_GPRELLOW:
@@ -3560,13 +3415,6 @@ elf64_alpha_relocate_section (output_bfd, info, input_bfd, input_section,
}
break;
- case R_ALPHA_OP_PUSH:
- case R_ALPHA_OP_STORE:
- case R_ALPHA_OP_PSUB:
- case R_ALPHA_OP_PRSHIFT:
- /* We hate these silly beasts. */
- abort ();
-
case R_ALPHA_LITERAL:
{
struct alpha_elf_got_entry *gotent;
@@ -3637,6 +3485,7 @@ elf64_alpha_relocate_section (output_bfd, info, input_bfd, input_section,
/* overflow handled by _bfd_final_link_relocate */
goto default_reloc;
+ case R_ALPHA_GPREL16:
case R_ALPHA_GPREL32:
case R_ALPHA_GPRELLOW:
BFD_ASSERT(gp != 0);
diff --git a/bfd/libbfd.h b/bfd/libbfd.h
index 5ddd02c..a0c6836 100644
--- a/bfd/libbfd.h
+++ b/bfd/libbfd.h
@@ -706,16 +706,11 @@ static const char *const bfd_reloc_code_real_names[] = { "@@uninitialized@@",
"BFD_RELOC_ALPHA_LITERAL",
"BFD_RELOC_ALPHA_ELF_LITERAL",
"BFD_RELOC_ALPHA_LITUSE",
- "BFD_RELOC_ALPHA_USER_LITERAL",
- "BFD_RELOC_ALPHA_USER_LITUSE_BASE",
- "BFD_RELOC_ALPHA_USER_LITUSE_BYTOFF",
- "BFD_RELOC_ALPHA_USER_LITUSE_JSR",
- "BFD_RELOC_ALPHA_USER_GPDISP",
- "BFD_RELOC_ALPHA_USER_GPRELHIGH",
- "BFD_RELOC_ALPHA_USER_GPRELLOW",
"BFD_RELOC_ALPHA_HINT",
"BFD_RELOC_ALPHA_LINKAGE",
"BFD_RELOC_ALPHA_CODEADDR",
+ "BFD_RELOC_ALPHA_GPREL_HI16",
+ "BFD_RELOC_ALPHA_GPREL_LO16",
"BFD_RELOC_MIPS_JMP",
"BFD_RELOC_MIPS16_JMP",
"BFD_RELOC_MIPS16_GPREL",
diff --git a/bfd/reloc.c b/bfd/reloc.c
index ab9f4d1..ef98042 100644
--- a/bfd/reloc.c
+++ b/bfd/reloc.c
@@ -1931,27 +1931,6 @@ ENUMDOC
2 - byte-manipulation (byte offset reg)
3 - jsr (target of branch)
- The GNU linker currently doesn't do any of this optimizing.
-
-ENUM
- BFD_RELOC_ALPHA_USER_LITERAL
-ENUMX
- BFD_RELOC_ALPHA_USER_LITUSE_BASE
-ENUMX
- BFD_RELOC_ALPHA_USER_LITUSE_BYTOFF
-ENUMX
- BFD_RELOC_ALPHA_USER_LITUSE_JSR
-ENUMX
- BFD_RELOC_ALPHA_USER_GPDISP
-ENUMX
- BFD_RELOC_ALPHA_USER_GPRELHIGH
-ENUMX
- BFD_RELOC_ALPHA_USER_GPRELLOW
-ENUMDOC
- The BFD_RELOC_ALPHA_USER_* relocations are used by the assembler to
- process the explicit !<reloc>!sequence relocations, and are mapped
- into the normal relocations at the end of processing.
-
ENUM
BFD_RELOC_ALPHA_HINT
ENUMDOC
@@ -1972,6 +1951,14 @@ ENUMDOC
which is filled by the linker.
ENUM
+ BFD_RELOC_ALPHA_GPREL_HI16
+ENUMX
+ BFD_RELOC_ALPHA_GPREL_LO16
+ENUMDOC
+ The GPREL_HI/LO relocations together form a 32-bit offset from the
+ GP register.
+
+ENUM
BFD_RELOC_MIPS_JMP
ENUMDOC
Bits 27..2 of the relocation address shifted right 2 bits;