diff options
Diffstat (limited to 'ports/sysdeps/arm/sysdep.h')
| -rw-r--r-- | ports/sysdeps/arm/sysdep.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/ports/sysdeps/arm/sysdep.h b/ports/sysdeps/arm/sysdep.h index 9230131c78..c525d5b977 100644 --- a/ports/sysdeps/arm/sysdep.h +++ b/ports/sysdeps/arm/sysdep.h @@ -150,6 +150,25 @@ # define NEGOFF_OFF1(R, OFF) [R, $OFF] # define NEGOFF_OFF2(R, OFFA, OFFB) [R, $OFFA] # endif + +/* Helper to get the TLS base pointer. The interface is that TMP is a + register that may be used to hold the LR, if necessary. TMP may be + LR itself to indicate that LR need not be saved. The base pointer + is returned in R0. Only R0 and TMP are modified. + + At this generic level we have no tricks to pull. Call the ABI routine. */ +# define GET_TLS(TMP) \ + push { r1, r2, r3, lr }; \ + cfi_remember_state; \ + cfi_adjust_cfa_offset (16); \ + cfi_rel_offset (r1, 0); \ + cfi_rel_offset (r2, 4); \ + cfi_rel_offset (r3, 8); \ + cfi_rel_offset (lr, 12); \ + bl __aeabi_read_tp; \ + pop { r1, r2, r3, lr }; \ + cfi_restore_state + #endif /* __ASSEMBLER__ */ /* This number is the offset from the pc at the current location. */ |