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yann@2437
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1 |
revert cfi additions to clone on i386/x86_64 to workaround problems in
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yann@2437
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2 |
gcc's unwinder code. this is not a bug in glibc, it triggers problems
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yann@2437
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3 |
elsewhere. this cfi code does not gain us a whole lot anyways.
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yann@2437
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4 |
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yann@2437
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5 |
http://gcc.gnu.org/ml/gcc/2006-12/msg00293.html
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yann@2437
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6 |
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yann@2437
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7 |
Index: sysdeps/unix/sysv/linux/i386/clone.S
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yann@2437
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8 |
===================================================================
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yann@2437
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9 |
RCS file: /cvs/glibc/libc/sysdeps/unix/sysv/linux/i386/clone.S,v
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yann@2437
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10 |
retrieving revision 1.27
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yann@2437
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11 |
retrieving revision 1.26
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yann@2437
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12 |
diff -u -p -r1.27 -r1.26
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yann@2437
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13 |
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yann@2437
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14 |
diff -durN glibc-2.12.1.orig/sysdeps/unix/sysv/linux/i386/clone.S glibc-2.12.1/sysdeps/unix/sysv/linux/i386/clone.S
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yann@2437
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15 |
--- glibc-2.12.1.orig/sysdeps/unix/sysv/linux/i386/clone.S 2006-12-04 00:12:36.000000000 +0100
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yann@2437
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16 |
+++ glibc-2.12.1/sysdeps/unix/sysv/linux/i386/clone.S 2009-11-13 00:49:45.000000000 +0100
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yann@2437
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17 |
@@ -120,9 +120,6 @@
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yann@2437
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18 |
ret
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yann@2437
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19 |
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yann@2437
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20 |
L(thread_start):
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yann@2437
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21 |
- cfi_startproc;
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yann@2437
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22 |
- /* Clearing frame pointer is insufficient, use CFI. */
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yann@2437
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23 |
- cfi_undefined (eip);
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yann@2437
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24 |
/* Note: %esi is zero. */
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yann@2437
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25 |
movl %esi,%ebp /* terminate the stack frame */
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yann@2437
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26 |
#ifdef RESET_PID
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yann@2437
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27 |
@@ -155,7 +152,6 @@
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yann@2437
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28 |
jmp L(haspid)
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yann@2437
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29 |
.previous
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yann@2437
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30 |
#endif
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yann@2437
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31 |
- cfi_endproc;
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yann@2437
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32 |
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yann@2437
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33 |
cfi_startproc
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yann@2437
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34 |
PSEUDO_END (BP_SYM (__clone))
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yann@2437
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35 |
diff -durN glibc-2.12.1.orig/sysdeps/unix/sysv/linux/x86_64/clone.S glibc-2.12.1/sysdeps/unix/sysv/linux/x86_64/clone.S
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yann@2437
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36 |
--- glibc-2.12.1.orig/sysdeps/unix/sysv/linux/x86_64/clone.S 2006-12-04 00:12:36.000000000 +0100
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yann@2437
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37 |
+++ glibc-2.12.1/sysdeps/unix/sysv/linux/x86_64/clone.S 2009-11-13 00:49:45.000000000 +0100
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yann@2437
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38 |
@@ -89,9 +89,6 @@
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yann@2437
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39 |
ret
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yann@2437
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40 |
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yann@2437
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41 |
L(thread_start):
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yann@2437
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42 |
- cfi_startproc;
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yann@2437
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43 |
- /* Clearing frame pointer is insufficient, use CFI. */
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yann@2437
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44 |
- cfi_undefined (rip);
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yann@2437
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45 |
/* Clear the frame pointer. The ABI suggests this be done, to mark
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yann@2437
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46 |
the outermost frame obviously. */
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yann@2437
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47 |
xorl %ebp, %ebp
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yann@2437
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48 |
@@ -116,7 +113,6 @@
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yann@2437
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49 |
/* Call exit with return value from function call. */
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yann@2437
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50 |
movq %rax, %rdi
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yann@2437
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51 |
call HIDDEN_JUMPTARGET (_exit)
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yann@2437
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52 |
- cfi_endproc;
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yann@2437
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53 |
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yann@2437
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54 |
cfi_startproc;
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yann@2437
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55 |
PSEUDO_END (BP_SYM (__clone))
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