[src/trunk]: src/sys/arch/arm/include Provide a non-EHABI version of the mcou...

[joerg <joerg%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/58339296e51d
branches:  trunk
changeset: 795906:58339296e51d
user:      joerg <joerg%NetBSD.org@localhost>
date:      Sun May 11 02:02:14 2014 +0000

description:
Provide a non-EHABI version of the mcount glue.

diffstat:

 sys/arch/arm/include/profile.h |  43 +++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 42 insertions(+), 1 deletions(-)

diffs (57 lines):

diff -r 47a6604dca24 -r 58339296e51d sys/arch/arm/include/profile.h
--- a/sys/arch/arm/include/profile.h    Sun May 11 01:05:17 2014 +0000
+++ b/sys/arch/arm/include/profile.h    Sun May 11 02:02:14 2014 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: profile.h,v 1.13 2013/11/30 21:07:59 joerg Exp $       */
+/*     $NetBSD: profile.h,v 1.14 2014/05/11 02:02:14 joerg Exp $       */
 
 /*
  * Copyright (c) 2001 Ben Harris
@@ -78,6 +78,47 @@
         */                                                             \
        __asm("pop      {r0-r3, pc}");                                  \
        __asm(".size    " MCOUNT_ASM_NAME ", .-" MCOUNT_ASM_NAME);
+#elif defined(__ARM_DWARF_EH__)
+#define        MCOUNT                                                          \
+       __asm(".text");                                                 \
+       __asm(".align   0");                                            \
+       __asm(".arm");                                                  \
+       __asm(".type    " MCOUNT_ASM_NAME ",%function");                \
+       __asm(".global  " MCOUNT_ASM_NAME);                             \
+       __asm(MCOUNT_ASM_NAME ":");                                     \
+       __asm(".cfi_startproc");                                        \
+       /*                                                              \
+        * Preserve registers that are trashed during mcount            \
+        */                                                             \
+       __asm("push     {r0-r4, ip, lr}");                              \
+       __asm(".cfi_def_cfa_offset 24");                                \
+       __asm(".cfi_offset 14, -4");                                    \
+       __asm(".cfi_offset 4, -8");                                     \
+       __asm(".cfi_offset 3, -12");                                    \
+       __asm(".cfi_offset 2, -16");                                    \
+       __asm(".cfi_offset 1, -20");                                    \
+       __asm(".cfi_offset 0, -24");                                    \
+       /*                                                              \
+        * find the return address for mcount,                          \
+        * and the return address for mcount's caller.                  \
+        *                                                              \
+        * frompcindex = pc pushed by call into self.                   \
+        */                                                             \
+       __asm("mov      r0, ip");                                       \
+       /*                                                              \
+        * selfpc = pc pushed by mcount call                            \
+        */                                                             \
+       __asm("mov      r1, lr");                                       \
+       /*                                                              \
+        * Call the real mcount code                                    \
+        */                                                             \
+       __asm("bl       " ___STRING(_C_LABEL(_mcount)) PLTSYM);         \
+       /*                                                              \
+        * Restore registers that were trashed during mcount            \
+        */                                                             \
+       __asm("pop      {r0-r4, lr, pc}");                              \
+       __asm(".cfi_endproc");                                          \
+       __asm(".size    " MCOUNT_ASM_NAME ", .-" MCOUNT_ASM_NAME);
 #else
 #define        MCOUNT                                                          \
        __asm(".text");                                                 \