diff options
| author | Stefan Liebler <stli@linux.vnet.ibm.com> | 2014-11-13 10:44:42 +0100 |
|---|---|---|
| committer | Andreas Krebbel <krebbel@linux.vnet.ibm.com> | 2014-11-13 10:44:42 +0100 |
| commit | 53244a4e12797f10c028d2cf0e091330854c44e7 (patch) | |
| tree | 5d507bb411c3c4c1131ead9d5eda8ab88fc69d22 /sysdeps/s390/s390-64 | |
| parent | 47df8251e8df7570d9581806113723aeb07dc35d (diff) | |
| download | glibc-53244a4e12797f10c028d2cf0e091330854c44e7.tar.gz glibc-53244a4e12797f10c028d2cf0e091330854c44e7.tar.xz glibc-53244a4e12797f10c028d2cf0e091330854c44e7.zip | |
S/390: Add SystemTap probes to longjmp and setjmp.
Diffstat (limited to 'sysdeps/s390/s390-64')
| -rw-r--r-- | sysdeps/s390/s390-64/__longjmp.c | 23 | ||||
| -rw-r--r-- | sysdeps/s390/s390-64/setjmp.S | 4 |
2 files changed, 23 insertions, 4 deletions
diff --git a/sysdeps/s390/s390-64/__longjmp.c b/sysdeps/s390/s390-64/__longjmp.c index 168ebf562b..e2b13f84ac 100644 --- a/sysdeps/s390/s390-64/__longjmp.c +++ b/sysdeps/s390/s390-64/__longjmp.c @@ -22,6 +22,7 @@ #include <bits/setjmp.h> #include <stdlib.h> #include <unistd.h> +#include <stap-probe.h> /* Jump to the position specified by ENV, causing the setjmp call there to return VAL, or 1 if VAL is 0. */ @@ -42,7 +43,20 @@ __longjmp (__jmp_buf env, int val) register void *r1 __asm ("%r1") = (void *) env; #endif /* Restore registers and jump back. */ - asm volatile ("ld %%f8,80(%1)\n\t" + asm volatile ( + /* longjmp probe expects longjmp first argument, second + argument and target address. */ +#ifdef PTR_DEMANGLE + "lmg %%r4,%%r5,64(%1)\n\t" + "xgr %%r4,%2\n\t" + "xgr %%r5,%2\n\t" + LIBC_PROBE_ASM (longjmp, 8@%1 -4@%0 8@%%r4) +#else + LIBC_PROBE_ASM (longjmp, 8@%1 -4@%0 8@%%r14) +#endif + + /* restore fpregs */ + "ld %%f8,80(%1)\n\t" "ld %%f9,88(%1)\n\t" "ld %%f10,96(%1)\n\t" "ld %%f11,104(%1)\n\t" @@ -50,15 +64,16 @@ __longjmp (__jmp_buf env, int val) "ld %%f13,120(%1)\n\t" "ld %%f14,128(%1)\n\t" "ld %%f15,136(%1)\n\t" + + /* restore gregs and return to jmp_buf target */ #ifdef PTR_DEMANGLE "lmg %%r6,%%r13,0(%1)\n\t" - "lmg %%r4,%%r5,64(%1)\n\t" - "xgr %%r4,%2\n\t" - "xgr %%r5,%2\n\t" "lgr %%r15,%%r5\n\t" + LIBC_PROBE_ASM (longjmp_target, 8@%1 -4@%0 8@%%r4) "br %%r4" #else "lmg %%r6,%%r15,0(%1)\n\t" + LIBC_PROBE_ASM (longjmp_target, 8@%1 -4@%0 8@%%r14) "br %%r14" #endif : : "r" (r2), diff --git a/sysdeps/s390/s390-64/setjmp.S b/sysdeps/s390/s390-64/setjmp.S index faa2784d17..03de2bf47e 100644 --- a/sysdeps/s390/s390-64/setjmp.S +++ b/sysdeps/s390/s390-64/setjmp.S @@ -22,6 +22,7 @@ #define _SETJMP_H #include <bits/setjmp.h> #include <shlib-compat.h> +#include <stap-probe.h> #if !defined IS_IN_rtld # if defined SHARED && SHLIB_COMPAT (libc, GLIBC_2_19, GLIBC_2_20) @@ -53,6 +54,9 @@ END (__setjmp) ENTRY(__sigsetjmp) .Linternal_sigsetjmp: + /* setjmp probe expects sig/setjmp first argument (8@%r2), second + argument (-8@%r3) and target address (8@%r14). */ + LIBC_PROBE (setjmp, 3, 8@%r2, -4@%r3, 8@%r14) #ifdef PTR_MANGLE stmg %r6,%r13,0(%r2) /* Store registers in jmp_buf. */ lgr %r4,%r14 |