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aix-unwind.h (MD_FALLBACK_FRAME_STATE_FOR): Define unconditionally.

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2017-06-07  Tony Reix  <tony.reix@atos.net>
            Matthieu Sarter  <matthieu.sarter.external@atos.net>
            David Edelsohn  <dje.gcc@gmail.com>

        * config/rs6000/aix-unwind.h (MD_FALLBACK_FRAME_STATE_FOR): Define
        unconditionally.
        (ucontext_for): Add 64-bit AIX 6.1, 7.1, 7.2 support.  Add 32-bit
        AIX 7.2 support.

Co-Authored-By: David Edelsohn <dje.gcc@gmail.com>
Co-Authored-By: Matthieu Sarter <matthieu.sarter.external@atos.net>

From-SVN: r248968
This commit is contained in:
Tony Reix 2017-06-07 12:35:19 +00:00 committed by David Edelsohn
parent 6d82c56288
commit d8b9cd2700
2 changed files with 37 additions and 9 deletions
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9
libgcc/ChangeLog
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@ -1,3 +1,12 @@
2017-06-07 Tony Reix <tony.reix@atos.net>
Matthieu Sarter <matthieu.sarter.external@atos.net>
David Edelsohn <dje.gcc@gmail.com>
* config/rs6000/aix-unwind.h (MD_FALLBACK_FRAME_STATE_FOR): Define
unconditionally.
(ucontext_for): Add 64-bit AIX 6.1, 7.1, 7.2 support. Add 32-bit
AIX 7.2 support.
2017-06-02 Olivier Hainque <hainque@adacore.com>
* config/vxlib.c (__gthread_once): Add missing value to

37
libgcc/config/rs6000/aix-unwind.h
View File

@ -64,7 +64,8 @@
#endif
/* Now on to MD_FALLBACK_FRAME_STATE_FOR.
32bit AIX 5.2, 5.3 and 7.1 only at this stage. */
32bit AIX 5.2, 5.3, 6.1, 7.X and
64bit AIX 6.1, 7.X only at this stage. */
#include <stdlib.h>
#include <stddef.h>
@ -73,18 +74,16 @@
#ifdef __64BIT__
/* 64bit fallback not implemented yet, so MD_FALLBACK_FRAME_STATE_FOR not
defined. Arrange just for the code below to compile. */
typedef struct __context64 mstate_t;
#else
typedef struct mstsave mstate_t;
#define MD_FALLBACK_FRAME_STATE_FOR ppc_aix_fallback_frame_state
#endif
#define MD_FALLBACK_FRAME_STATE_FOR ppc_aix_fallback_frame_state
/* If we are compiling on AIX < 5.3, the VMX related datastructs are not
defined and we take measures to obtain proper runtime behavior if the
compiled code happens to run on a later version with VMX enabled. */
@ -128,10 +127,26 @@ ucontext_for (struct _Unwind_Context *context)
{
const unsigned int * ra = context->ra;
/* AIX 5.2, 5.3 and 7.1, threaded or not, share common patterns
/* AIX 5.2, 5.3, 6.1 and 7.X, threaded or not, share common patterns
and feature variants depending on the configured kernel (unix_mp
or unix_64). */
#ifdef __64BIT__
if (*(ra - 5) == 0x4c00012c /* isync */
&& *(ra - 4) == 0xe8ec0000 /* ld r7,0(r12) */
&& *(ra - 3) == 0xe84c0008 /* ld r2,8(r12) */
&& *(ra - 2) == 0x7ce903a6 /* mtctr r7 */
&& *(ra - 1) == 0x4e800421 /* bctrl */
&& *(ra - 0) == 0x7de27b78) /* mr r2,r15 <-- context->ra */
{
/* unix_64 */
if (*(ra - 6) == 0x7d000164) /* mtmsrd r8 */
{
/* AIX 6.1, 7.1 and 7.2 */
return (ucontext_t *)(context->cfa + 0x70);
}
}
#else
if (*(ra - 5) == 0x4c00012c /* isync */
&& *(ra - 4) == 0x80ec0000 /* lwz r7,0(r12) */
&& *(ra - 3) == 0x804c0004 /* lwz r2,4(r12) */
@ -152,10 +167,14 @@ ucontext_for (struct _Unwind_Context *context)
case 0x835a0570: /* lwz r26,1392(r26) */
return (ucontext_t *)(context->cfa + 0x40);
/* AIX 7.1 */
/* AIX 6.1 and 7.1 */
case 0x2c1a0000: /* cmpwi r26,0 */
return (ucontext_t *)(context->cfa + 0x40);
/* AIX 7.2 */
case 0x3800000a: /* li r0,A */
return (ucontext_t *)(context->cfa + 0x40);
default:
return 0;
}
@ -174,7 +193,7 @@ ucontext_for (struct _Unwind_Context *context)
return &frame->ucontext;
}
}
#endif
return 0;
}