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| author | Richard Henderson <rth@twiddle.net> | 2013-02-14 22:15:55 -0800 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2013-03-06 07:46:47 -0800 |
| commit | d137b6dc52efbb0a55baba8e8851e930cc781217 (patch) | |
| tree | b4d970800dded1501bcbc6738983caa670943bcf | |
| parent | 46dede0c00285bb43890ed68c0b8572e855b54e2 (diff) | |
| download | glibc-d137b6dc52efbb0a55baba8e8851e930cc781217.zip glibc-d137b6dc52efbb0a55baba8e8851e930cc781217.tar.gz glibc-d137b6dc52efbb0a55baba8e8851e930cc781217.tar.bz2 | |
arm: Unless arm4t, pop return address directly into pc
| -rw-r--r-- | ports/ChangeLog.arm | 4 | ||||
| -rw-r--r-- | ports/sysdeps/arm/arm-mcount.S | 6 | ||||
| -rw-r--r-- | ports/sysdeps/arm/dl-tlsdesc.S | 9 |
3 files changed, 14 insertions, 5 deletions
diff --git a/ports/ChangeLog.arm b/ports/ChangeLog.arm index 7acde01..400a7db 100644 --- a/ports/ChangeLog.arm +++ b/ports/ChangeLog.arm @@ -1,5 +1,9 @@ 2013-03-06 Richard Henderson <rth@redhat.com> + * sysdeps/arm/arm-mcount.S (_mcount): Use pop into pc unless + __ARM_ARCH_4T__ and __THUMB_INTERWORK__. + * sysdeps/arm/dl-tlsdesc.S (_dl_tlsdesc_dynamic): Likewise. + * sysdeps/arm/sysdep.h (BX, BXC, BLX): New macros. (DO_RET): Use BX. (RETINSTR): Use BXC. diff --git a/ports/sysdeps/arm/arm-mcount.S b/ports/sysdeps/arm/arm-mcount.S index b6e5ec7..8ad0779 100644 --- a/ports/sysdeps/arm/arm-mcount.S +++ b/ports/sysdeps/arm/arm-mcount.S @@ -82,9 +82,7 @@ ENTRY(_mcount) ldrne r0, [r0, #-4] movsne r1, lr blne __mcount_internal -#ifdef __thumb2__ - pop {r0, r1, r2, r3, fp, pc} -#else +#if defined (__ARM_ARCH_4T__) && defined (__THUMB_INTERWORK__) pop {r0, r1, r2, r3, fp, lr} cfi_adjust_cfa_offset (-24) cfi_restore (r0) @@ -94,6 +92,8 @@ ENTRY(_mcount) cfi_restore (fp) cfi_restore (lr) bx lr +#else + pop {r0, r1, r2, r3, fp, pc} #endif END(_mcount) diff --git a/ports/sysdeps/arm/dl-tlsdesc.S b/ports/sysdeps/arm/dl-tlsdesc.S index 62a7e43..e810d0d 100644 --- a/ports/sysdeps/arm/dl-tlsdesc.S +++ b/ports/sysdeps/arm/dl-tlsdesc.S @@ -109,13 +109,18 @@ _dl_tlsdesc_dynamic: 1: mov r0, r1 bl __tls_get_addr rsb r0, r4, r0 -2: pop {r2,r3,r4, lr} +2: +#if defined (__ARM_ARCH_4T__) && defined (__THUMB_INTERWORK__) + pop {r2,r3,r4, lr} cfi_adjust_cfa_offset (-16) cfi_restore (lr) cfi_restore (r4) cfi_restore (r3) cfi_restore (r2) - BX (lr) + bx lr +#else + pop {r2,r3,r4, pc} +#endif .fnend cfi_endproc .size _dl_tlsdesc_dynamic, .-_dl_tlsdesc_dynamic |