Add FDPIC relocation definitions in BFD and gas.
Gas rejects them if the --fdpic option was not specified.
2018-04-25 Christophe Lyon <christophe.lyon@st.com>
Mickaël Guêné <mickael.guene@st.com>
bfd/
* bfd-in2.c (BFD_RELOC_ARM_GOTFUNCDESC)
(BFD_RELOC_ARM_GOTOFFFUNCDESC, BFD_RELOC_ARM_FUNCDESC)
(BFD_RELOC_ARM_FUNCDESC_VALUE): New.
* elf32-arm.c (elf32_arm_howto_table_2): Add R_ARM_GOTFUNCDESC,
R_ARM_GOTOFFFUNCDESC, R_ARM_FUNCDESC, R_ARM_FUNCDESC_VALUE.
(elf32_arm_howto_from_type): Take new members of
elf32_arm_howto_table_2 into account.
(elf32_arm_reloc_map): Add BFD_RELOC_ARM_GOTFUNCDESC,
BFD_RELOC_ARM_GOTOFFFUNCDESC, BFD_RELOC_ARM_FUNCDESC,
BFD_RELOC_ARM_FUNCDESC_VALUE.
* reloc.c: Add BFD_RELOC_ARM_GOTFUNCDESC,
BFD_RELOC_ARM_GOTOFFFUNCDESC, BFD_RELOC_ARM_FUNCDESC,
BFD_RELOC_ARM_FUNCDESC_VALUE.
gas/
* config/tc-arm.c (reloc_names): Add gotfuncdesc, gotofffuncdesc,
funcdesc.
(md_apply_fix): Support the new relocations.
(tc_gen_reloc): Likewise.
* testsuite/gas/arm/reloc-fdpic.d: New.
* testsuite/gas/arm/reloc-fdpic.s: New.
include/
* elf/arm.h (R_ARM_GOTFUNCDESC, R_ARM_GOTOFFFUNCDESC)
(R_ARM_FUNCDESC)
(R_ARM_FUNCDESC_VALUE): Define new relocations.
+2018-04-25 Christophe Lyon <christophe.lyon@st.com>
+ Mickaël Guêné <mickael.guene@st.com>
+
+ * bfd-in2.c (BFD_RELOC_ARM_GOTFUNCDESC)
+ (BFD_RELOC_ARM_GOTOFFFUNCDESC, BFD_RELOC_ARM_FUNCDESC)
+ (BFD_RELOC_ARM_FUNCDESC_VALUE): New.
+ * elf32-arm.c (elf32_arm_howto_table_2): Add R_ARM_GOTFUNCDESC,
+ R_ARM_GOTOFFFUNCDESC, R_ARM_FUNCDESC, R_ARM_FUNCDESC_VALUE.
+ (elf32_arm_howto_from_type): Take new members of
+ elf32_arm_howto_table_2 into account.
+ (elf32_arm_reloc_map): Add BFD_RELOC_ARM_GOTFUNCDESC,
+ BFD_RELOC_ARM_GOTOFFFUNCDESC, BFD_RELOC_ARM_FUNCDESC,
+ BFD_RELOC_ARM_FUNCDESC_VALUE.
+ * reloc.c: Add BFD_RELOC_ARM_GOTFUNCDESC,
+ BFD_RELOC_ARM_GOTOFFFUNCDESC, BFD_RELOC_ARM_FUNCDESC,
+ BFD_RELOC_ARM_FUNCDESC_VALUE.
+
2018-04-25 Christophe Lyon <christophe.lyon@st.com>
Mickaël Guêné <mickael.guene@st.com>
BFD_RELOC_ARM_THUMB_MOVW_PCREL,
BFD_RELOC_ARM_THUMB_MOVT_PCREL,
+/* ARM FDPIC specific relocations. */
+ BFD_RELOC_ARM_GOTFUNCDESC,
+ BFD_RELOC_ARM_GOTOFFFUNCDESC,
+ BFD_RELOC_ARM_FUNCDESC,
+ BFD_RELOC_ARM_FUNCDESC_VALUE,
+
/* Relocations for setting up GOTs and PLTs for shared libraries. */
BFD_RELOC_ARM_JUMP_SLOT,
BFD_RELOC_ARM_GLOB_DAT,
};
/* 160 onwards: */
-static reloc_howto_type elf32_arm_howto_table_2[1] =
+static reloc_howto_type elf32_arm_howto_table_2[5] =
{
HOWTO (R_ARM_IRELATIVE, /* type */
0, /* rightshift */
TRUE, /* partial_inplace */
0xffffffff, /* src_mask */
0xffffffff, /* dst_mask */
- FALSE) /* pcrel_offset */
+ FALSE), /* pcrel_offset */
+ HOWTO (R_ARM_GOTFUNCDESC, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 32, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield,/* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_ARM_GOTFUNCDESC", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffffffff, /* dst_mask */
+ FALSE), /* pcrel_offset */
+ HOWTO (R_ARM_GOTOFFFUNCDESC, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 32, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield,/* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_ARM_GOTOFFFUNCDESC",/* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffffffff, /* dst_mask */
+ FALSE), /* pcrel_offset */
+ HOWTO (R_ARM_FUNCDESC, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 32, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield,/* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_ARM_FUNCDESC", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffffffff, /* dst_mask */
+ FALSE), /* pcrel_offset */
+ HOWTO (R_ARM_FUNCDESC_VALUE, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 64, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield,/* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_ARM_FUNCDESC_VALUE",/* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffffffff, /* dst_mask */
+ FALSE), /* pcrel_offset */
};
/* 249-255 extended, currently unused, relocations: */
if (r_type < ARRAY_SIZE (elf32_arm_howto_table_1))
return &elf32_arm_howto_table_1[r_type];
- if (r_type == R_ARM_IRELATIVE)
+ if (r_type >= R_ARM_IRELATIVE
+ && r_type < R_ARM_IRELATIVE + ARRAY_SIZE (elf32_arm_howto_table_2))
return &elf32_arm_howto_table_2[r_type - R_ARM_IRELATIVE];
if (r_type >= R_ARM_RREL32
{BFD_RELOC_ARM_TLS_IE32, R_ARM_TLS_IE32},
{BFD_RELOC_ARM_TLS_LE32, R_ARM_TLS_LE32},
{BFD_RELOC_ARM_IRELATIVE, R_ARM_IRELATIVE},
+ {BFD_RELOC_ARM_GOTFUNCDESC, R_ARM_GOTFUNCDESC},
+ {BFD_RELOC_ARM_GOTOFFFUNCDESC, R_ARM_GOTOFFFUNCDESC},
+ {BFD_RELOC_ARM_FUNCDESC, R_ARM_FUNCDESC},
+ {BFD_RELOC_ARM_FUNCDESC_VALUE, R_ARM_FUNCDESC_VALUE},
{BFD_RELOC_VTABLE_INHERIT, R_ARM_GNU_VTINHERIT},
{BFD_RELOC_VTABLE_ENTRY, R_ARM_GNU_VTENTRY},
{BFD_RELOC_ARM_MOVW, R_ARM_MOVW_ABS_NC},
ENUMDOC
Low and High halfword relocations for MOVW and MOVT instructions.
+ENUM
+ BFD_RELOC_ARM_GOTFUNCDESC
+ENUMX
+ BFD_RELOC_ARM_GOTOFFFUNCDESC
+ENUMX
+ BFD_RELOC_ARM_FUNCDESC
+ENUMX
+ BFD_RELOC_ARM_FUNCDESC_VALUE
+ENUMDOC
+ ARM FDPIC specific relocations.
+
ENUM
BFD_RELOC_ARM_JUMP_SLOT
ENUMX
+2018-04-25 Christophe Lyon <christophe.lyon@st.com>
+ Mickaël Guêné <mickael.guene@st.com>
+
+ * config/tc-arm.c (reloc_names): Add gotfuncdesc, gotofffuncdesc,
+ funcdesc.
+ (md_apply_fix): Support the new relocations.
+ (tc_gen_reloc): Likewise.
+ * testsuite/gas/arm/reloc-fdpic.d: New.
+ * testsuite/gas/arm/reloc-fdpic.s: New.
+
2018-04-25 Christophe Lyon <christophe.lyon@st.com>
Mickaël Guêné <mickael.guene@st.com>
{ "tlscall", BFD_RELOC_ARM_TLS_CALL},
{ "TLSCALL", BFD_RELOC_ARM_TLS_CALL},
{ "tlsdescseq", BFD_RELOC_ARM_TLS_DESCSEQ},
- { "TLSDESCSEQ", BFD_RELOC_ARM_TLS_DESCSEQ}
+ { "TLSDESCSEQ", BFD_RELOC_ARM_TLS_DESCSEQ},
+ { "gotfuncdesc", BFD_RELOC_ARM_GOTFUNCDESC },
+ { "GOTFUNCDESC", BFD_RELOC_ARM_GOTFUNCDESC },
+ { "gotofffuncdesc", BFD_RELOC_ARM_GOTOFFFUNCDESC },
+ { "GOTOFFFUNCDESC", BFD_RELOC_ARM_GOTOFFFUNCDESC },
+ { "funcdesc", BFD_RELOC_ARM_FUNCDESC },
+ { "FUNCDESC", BFD_RELOC_ARM_FUNCDESC }
};
#endif
if (fixP->fx_done || !seg->use_rela_p)
md_number_to_chars (buf, fixP->fx_offset, 4);
break;
+
+ /* Relocations for FDPIC. */
+ case BFD_RELOC_ARM_GOTFUNCDESC:
+ case BFD_RELOC_ARM_GOTOFFFUNCDESC:
+ case BFD_RELOC_ARM_FUNCDESC:
+ if (arm_fdpic)
+ {
+ if (fixP->fx_done || !seg->use_rela_p)
+ md_number_to_chars (buf, 0, 4);
+ }
+ else
+ {
+ as_bad_where (fixP->fx_file, fixP->fx_line,
+ _("Relocation supported only in FDPIC mode"));
+ }
+ break;
#endif
case BFD_RELOC_RVA:
case BFD_RELOC_ARM_THUMB_ALU_ABS_G1_NC:
case BFD_RELOC_ARM_THUMB_ALU_ABS_G2_NC:
case BFD_RELOC_ARM_THUMB_ALU_ABS_G3_NC:
+ case BFD_RELOC_ARM_GOTFUNCDESC:
+ case BFD_RELOC_ARM_GOTOFFFUNCDESC:
+ case BFD_RELOC_ARM_FUNCDESC:
code = fixp->fx_r_type;
break;
--- /dev/null
+#as: --fdpic
+#objdump: -dr --show-raw-insn
+#name: FDPIC relocations
+# This test is only valid on ELF based ports.
+#not-skip: arm*-*-uclinuxfdpiceabi
+
+.*: +file format .*arm.*
+
+
+Disassembly of section .text:
+
+00000000 <myfunc-0xc>:
+.*
+ 0: R_ARM_GOTFUNCDESC myfunc
+ 4: R_ARM_GOTOFFFUNCDESC myfunc
+ 8: R_ARM_FUNCDESC myfunc
+
+0000000c <myfunc>:
+ c: e12fff1e bx lr
+.*
\ No newline at end of file
--- /dev/null
+ .syntax unified
+
+ .word myfunc(GOTFUNCDESC)
+ .word myfunc(GOTOFFFUNCDESC)
+ .word myfunc(FUNCDESC)
+
+ .type myfunc, %function
+myfunc:
+ bx lr
+2018-04-25 Christophe Lyon <christophe.lyon@st.com>
+ Mickaël Guêné <mickael.guene@st.com>
+
+ * elf/arm.h (R_ARM_GOTFUNCDESC, R_ARM_GOTOFFFUNCDESC)
+ (R_ARM_FUNCDESC)
+ (R_ARM_FUNCDESC_VALUE): Define new relocations.
+
2018-04-25 Christophe Lyon <christophe.lyon@st.com>
Mickaël Guêné <mickael.guene@st.com>
RELOC_NUMBER (R_ARM_THM_ALU_ABS_G3_NC,135)
RELOC_NUMBER (R_ARM_IRELATIVE, 160)
+ RELOC_NUMBER (R_ARM_GOTFUNCDESC, 161)
+ RELOC_NUMBER (R_ARM_GOTOFFFUNCDESC, 162)
+ RELOC_NUMBER (R_ARM_FUNCDESC, 163)
+ RELOC_NUMBER (R_ARM_FUNCDESC_VALUE, 164)
/* Extensions? R=read-only? */
RELOC_NUMBER (R_ARM_RXPC25, 249)