diff options
| author | Richard Henderson <rth@twiddle.net> | 2013-02-13 21:21:39 -0800 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2013-03-06 07:44:24 -0800 |
| commit | cd24e113c38e81c15a72536a99062373d5701389 (patch) | |
| tree | 9bf6a337d9d803b5e9e80fea4c6e676140d9b770 /ports/sysdeps/arm/sysdep.h | |
| parent | 8e39047d31421857f7c8a95816e8eb785199ccb3 (diff) | |
| download | glibc-cd24e113c38e81c15a72536a99062373d5701389.zip glibc-cd24e113c38e81c15a72536a99062373d5701389.tar.gz glibc-cd24e113c38e81c15a72536a99062373d5701389.tar.bz2 | |
arm: Introduce and use LDST_PCREL
Macro-ising the few instances where we need to distinguish between
arm and thumb pc-relative memory operations.
Diffstat (limited to 'ports/sysdeps/arm/sysdep.h')
| -rw-r--r-- | ports/sysdeps/arm/sysdep.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/ports/sysdeps/arm/sysdep.h b/ports/sysdeps/arm/sysdep.h index 4af7429..29a78f0 100644 --- a/ports/sysdeps/arm/sysdep.h +++ b/ports/sysdeps/arm/sysdep.h @@ -117,6 +117,23 @@ the caller. */ .eabi_attribute 24, 1 +/* Load or store to/from a pc-relative EXPR into/from R, using T. */ +# ifdef __thumb2__ +# define LDST_PCREL(OP, R, T, EXPR) \ + ldr T, 98f; \ + .subsection 2; \ +98: .word EXPR - 99f - PC_OFS; \ + .previous; \ +99: add T, T, pc; \ + OP R, [T] +# else +# define LDST_PCREL(OP, R, T, EXPR) \ + ldr T, 98f; \ + .subsection 2; \ +98: .word EXPR - 99f - PC_OFS; \ + .previous; \ +99: OP R, [pc, T] +# endif #endif /* __ASSEMBLER__ */ /* This number is the offset from the pc at the current location. */ |