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| author | Pat Bernardi <bernardi@adacore.com> | 2020-06-25 16:05:38 -0400 |
|---|---|---|
| committer | Alan Modra <amodra@gmail.com> | 2020-06-26 14:42:19 +0930 |
| commit | 85f7484a3a1921649029c4a4fcf3247c3f3bc13c (patch) | |
| tree | d8cec9b624c9984936c00c9f3389d0c3a757750d /include/elf | |
| parent | ba9b3ef5ee666467b67780e81f868c432f4fc56d (diff) | |
| download | gdb-85f7484a3a1921649029c4a4fcf3247c3f3bc13c.zip gdb-85f7484a3a1921649029c4a4fcf3247c3f3bc13c.tar.gz gdb-85f7484a3a1921649029c4a4fcf3247c3f3bc13c.tar.bz2 | |
m68k: tag floating-point ABI used
This patch adds GNU attribute support to m68k and utilises it to tag the
floating-point calling convention used (hard-float or soft-float). It enables
the linker to ensure linked objects use a consistent floating-point ABI and
allows tools like GDB to infer the ABI used from the ELF file. It is based on
similar work done for PowerPC.
bfd/
* elf32-m68k.c (m68k_elf_merge_obj_attributes): New function.
(elf32_m68k_merge_private_bfd_data): Merge GNU attributes.
binutils/
* readelf.c (display_m68k_gnu_attribute): New function.
(process_arch_specific): Call display_m68k_gnu_attribute for EM_68K.
gas/
* config/tc-m68k.c (m68k_elf_gnu_attribute): New function.
(md_pseudo_table): Handle "gnu_attribute".
* doc/as.texi: Document GNU attribute for M68K.
include/
* elf/m68k.h: Add enum for GNU object attribute with floating point
tag name and values.
ld/
* testsuite/ld-m68k/attr-gnu-4-0.s: New file.
* testsuite/ld-m68k/attr-gnu-4-1.s: Likewise.
* testsuite/ld-m68k/attr-gnu-4-2.s: Likewise.
* testsuite/ld-m68k/attr-gnu-4-00.d: Likewise.
* testsuite/ld-m68k/attr-gnu-4-01.d: Likewise.
* testsuite/ld-m68k/attr-gnu-4-02.d: Likewise.
* testsuite/ld-m68k/attr-gnu-4-10.d: Likewise.
* testsuite/ld-m68k/attr-gnu-4-11.d: Likewise.
* testsuite/ld-m68k/attr-gnu-4-12.d: Likewise.
* testsuite/ld-m68k/attr-gnu-4-20.d: Likewise.
* testsuite/ld-m68k/attr-gnu-4-21.d: Likewise.
* testsuite/ld-m68k/attr-gnu-4-22.d: Likewise.
* testsuite/ld-m68k/m68k.exp: Run the new tests.
Diffstat (limited to 'include/elf')
| -rw-r--r-- | include/elf/m68k.h | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/include/elf/m68k.h b/include/elf/m68k.h index 2d3c12e..e5b0592 100644 --- a/include/elf/m68k.h +++ b/include/elf/m68k.h @@ -97,5 +97,17 @@ END_RELOC_NUMBERS (R_68K_max) #define EF_M68K_CF_EMAC_B 0x30 /* EMAC_B */ #define EF_M68K_CF_FLOAT 0x40 /* Has float insns */ #define EF_M68K_CF_MASK 0xFF - + +/* GNU object attribute tags. */ +enum +{ + /* 0-3 are generic. */ + + /* FP ABI, low 2 bits: + 1 for double precision hard-float, + 2 for soft-float, + 0 for not tagged or not using any ABIs affected by the differences. */ + Tag_GNU_M68K_ABI_FP = 4, +}; + #endif |