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authorWalter Lee <walt@tilera.com>2012-08-28 02:43:22 +0000
committerWalter Lee <walt@tilera.com>2012-08-28 02:43:22 +0000
commite5b95258d9dd1ecc4a53baf56308ce78f19f4904 (patch)
tree3f98a860be8a85ea99ae0519037d37c5801c123f /gas/doc
parentaedbcd6364b2c09c7d6a193d46b064b42013b857 (diff)
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Add support for constructing pc-relative addresses to the plt, by
adding the necessary assembly operators and relocations. bfd: * reloc.c (Add BFD_RELOC_TILEGX_IMM16_X0_HW0_PLT_PCREL, BFD_RELOC_TILEGX_IMM16_X1_HW0_PLT_PCREL, BFD_RELOC_TILEGX_IMM16_X0_HW1_PLT_PCREL, BFD_RELOC_TILEGX_IMM16_X1_HW1_PLT_PCREL, BFD_RELOC_TILEGX_IMM16_X0_HW2_PLT_PCREL, BFD_RELOC_TILEGX_IMM16_X1_HW2_PLT_PCREL, BFD_RELOC_TILEGX_IMM16_X0_HW3_PLT_PCREL, BFD_RELOC_TILEGX_IMM16_X1_HW3_PLT_PCREL, BFD_RELOC_TILEGX_IMM16_X0_HW0_LAST_PLT_PCREL, BFD_RELOC_TILEGX_IMM16_X1_HW0_LAST_PLT_PCREL, BFD_RELOC_TILEGX_IMM16_X0_HW1_LAST_PLT_PCREL, BFD_RELOC_TILEGX_IMM16_X1_HW1_LAST_PLT_PCREL, BFD_RELOC_TILEGX_IMM16_X0_HW2_LAST_PLT_PCREL, BFD_RELOC_TILEGX_IMM16_X1_HW2_LAST_PLT_PCREL): new relocations. * elfxx-tilegx.c (tilegx_elf_howto_table): Handle new relocations. (tilegx_reloc_map): Ditto. (reloc_to_create_func): Ditto. (tilegx_elf_check_relocs): Ditto. (tilegx_elf_gc_sweep_hook): Ditto. (tilegx_elf_relocate_section): Ditto. * libbfd.h: Regenerate. * bfd-in2.h: Regenerate. gas: * tc-tilegx.c (O_hw0_plt): Define operator. (O_hw1_plt): Ditto. (O_hw1_last_plt): Ditto. (O_hw2_last_plt): Ditto. (md_begin): Handle new operators. (emit_tilegx_instruction): Ditto. (md_apply_fix): Ditto. * doc/c-tilegx.texi: Document new operators. include/elf: * tilegx.h (R_TILEGX_IMM16_X0_HW0_PLT_PCREL): New relocation. (R_TILEGX_IMM16_X1_HW0_PLT_PCREL): Ditto. (R_TILEGX_IMM16_X0_HW1_PLT_PCREL): Ditto. (R_TILEGX_IMM16_X1_HW1_PLT_PCREL): Ditto. (R_TILEGX_IMM16_X0_HW2_PLT_PCREL): Ditto. (R_TILEGX_IMM16_X1_HW2_PLT_PCREL): Ditto. (R_TILEGX_IMM16_X0_HW3_PLT_PCREL): Ditto. (R_TILEGX_IMM16_X1_HW3_PLT_PCREL): Ditto. (R_TILEGX_IMM16_X0_HW0_LAST_PLT_PCREL): Ditto. (R_TILEGX_IMM16_X1_HW0_LAST_PLT_PCREL): Ditto. (R_TILEGX_IMM16_X0_HW1_LAST_PLT_PCREL): Ditto. (R_TILEGX_IMM16_X1_HW1_LAST_PLT_PCREL): Ditto. (R_TILEGX_IMM16_X0_HW2_LAST_PLT_PCREL ): Ditto. (R_TILEGX_IMM16_X1_HW2_LAST_PLT_PCREL): Ditto.
Diffstat (limited to 'gas/doc')
-rw-r--r--gas/doc/c-tilegx.texi20
1 files changed, 20 insertions, 0 deletions
diff --git a/gas/doc/c-tilegx.texi b/gas/doc/c-tilegx.texi
index 268cc4f..0d8c038 100644
--- a/gas/doc/c-tilegx.texi
+++ b/gas/doc/c-tilegx.texi
@@ -242,6 +242,26 @@ called (at latest; depending environment variables). It is only safe
to leave the symbol unresolved this way if all references are function
calls.
+@item hw0_plt
+
+This modifier is used to load bits 0-15 of the pc-relative address of
+a plt entry.
+
+@item hw1_plt
+
+This modifier is used to load bits 16-31 of the pc-relative address of
+a plt entry.
+
+@item hw1_last_plt
+
+This modifier yields the same value as @code{hw1_plt}, but it also
+checks that the value does not overflow.
+
+@item hw2_last_plt
+
+This modifier is used to load bits 32-47 of the pc-relative address of
+a plt entry, and it also checks that the value does not overflow.
+
@item hw0_tls_gd
This modifier is used to load bits 0-15 of the offset of the GOT entry