[PATCH] aarch64: Add setjmp and longjmp SystemTap probes

[Will Newton]

On 8 April 2014 14:15, Will Newton <will.newton@linaro.org> wrote:
> From: Venkataramanan Kumar <venkataramanan.kumar@linaro.org>
>
> Add setjmp, longjmp and longjmp_target Systemtap probes.
>
> ChangeLog:
>
> 2014-04-08  Will Newton  <will.newton@linaro.org>
>             Venkataramanan Kumar  <venkataramanan.kumar@linaro.org>
>
>         * sysdeps/aarch64/__longjmp.S: Include stap-probe.h.
>         (__longjmp): Add longjmp and longjmp_target SystemTap
>         probes.
>         * sysdeps/aarch64/setjmp.S: Include stap-probe.h.
>         (__sigsetjmp): Add setjmp SystemTap probe.
> ---
>  sysdeps/aarch64/__longjmp.S | 10 ++++++++++
>  sysdeps/aarch64/setjmp.S    |  5 +++++
>  2 files changed, 15 insertions(+)

Ping?

> diff --git a/sysdeps/aarch64/__longjmp.S b/sysdeps/aarch64/__longjmp.S
> index 2d38bbf..1bb7be36 100644
> --- a/sysdeps/aarch64/__longjmp.S
> +++ b/sysdeps/aarch64/__longjmp.S
> @@ -18,6 +18,7 @@
>
>  #include <sysdep.h>
>  #include <jmpbuf-offsets.h>
> +#include <stap-probe.h>
>
>  /* __longjmp(jmpbuf, val) */
>
> @@ -56,6 +57,10 @@ ENTRY (__longjmp)
>  #else
>         ldp     x29, x30, [x0, #JB_X29<<3]
>  #endif
> +       /* longjmp probe takes 3 arguments, address of jump buffer as
> +          first argument (8@x0), return value as second argument (-4@x1),
> +          and target address (8@x30), respectively.  */
> +       LIBC_PROBE (longjmp, 3, 8@x0, -4@x1, 8@x30)
>         ldp      d8,  d9, [x0, #JB_D8<<3]
>         ldp     d10, d11, [x0, #JB_D10<<3]
>         ldp     d12, d13, [x0, #JB_D12<<3]
> @@ -98,6 +103,11 @@ ENTRY (__longjmp)
>         ldr     x5, [x0, #JB_SP<<3]
>  #endif
>         mov     sp, x5
> +
> +       /* longjmp_target probe takes 3 arguments, address of jump buffer
> +          as first argument (8@x0), return value as second argument (-4@x1),
> +          and target address (8@x30), respectively.  */
> +       LIBC_PROBE (longjmp_target, 3, 8@x0, -4@x1, 8@x30)
>         cmp     x1, #0
>         mov     x0, #1
>         csel    x0, x1, x0, ne
> diff --git a/sysdeps/aarch64/setjmp.S b/sysdeps/aarch64/setjmp.S
> index 5822abd..fd39319 100644
> --- a/sysdeps/aarch64/setjmp.S
> +++ b/sysdeps/aarch64/setjmp.S
> @@ -18,6 +18,7 @@
>
>  #include <sysdep.h>
>  #include <jmpbuf-offsets.h>
> +#include <stap-probe.h>
>
>          /* Keep traditional entry points in with sigsetjmp(). */
>  ENTRY (setjmp)
> @@ -46,6 +47,10 @@ ENTRY (__sigsetjmp)
>  #else
>         stp     x29, x30, [x0, #JB_X29<<3]
>  #endif
> +       /* setjmp probe takes 3 arguments, address of jump buffer
> +          first argument (8@x0), return value second argument (-4@x1),
> +          and target address (8@x30), respectively.  */
> +       LIBC_PROBE (setjmp, 3, 8@x0, -4@x1, 8@x30)
>         stp      d8,  d9, [x0, #JB_D8<<3]
>         stp     d10, d11, [x0, #JB_D10<<3]
>         stp     d12, d13, [x0, #JB_D12<<3]
> --
> 1.8.1.4
>



-- 
Will Newton
Toolchain Working Group, Linaro