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| author | David Smith <dsmith@redhat.com> | 2009-04-16 12:25:24 -0500 |
|---|---|---|
| committer | David Smith <dsmith@redhat.com> | 2009-04-16 12:25:24 -0500 |
| commit | 7843fe51d664fc94d8808b3e4c4a6bccb0c481c3 (patch) | |
| tree | af271175b00203dea7a8ea8d17e4cc7ab86959f9 /runtime | |
| parent | bc33c23b2953b923446ea059e9991913d8b2cc3c (diff) | |
| download | systemtap-steved-7843fe51d664fc94d8808b3e4c4a6bccb0c481c3.tar.gz systemtap-steved-7843fe51d664fc94d8808b3e4c4a6bccb0c481c3.tar.xz systemtap-steved-7843fe51d664fc94d8808b3e4c4a6bccb0c481c3.zip | |
Improved ppc and ia64 runtime/syscall.h.
2009-04-16 David Smith <dsmith@redhat.com>
* syscall.h (syscall_get_arguments): Fixed sign extension for
32-bit processes on ppc64.
(__ia64_syscall_get_arguments): Calls ia64_fetch_register()
to handle NULL values. Corrected register numbers.
Diffstat (limited to 'runtime')
| -rw-r--r-- | runtime/syscall.h | 25 |
1 files changed, 18 insertions, 7 deletions
diff --git a/runtime/syscall.h b/runtime/syscall.h index 6d22ba83..5e538389 100644 --- a/runtime/syscall.h +++ b/runtime/syscall.h @@ -124,7 +124,7 @@ syscall_get_nr(struct task_struct *task, struct pt_regs *regs) static inline long syscall_get_nr(struct task_struct *task, struct pt_regs *regs) { - return regs->r15; + return regs->r15; } #endif @@ -304,6 +304,17 @@ syscall_get_arguments(struct task_struct *task, struct pt_regs *regs, _stp_error("invalid syscall arg request"); return; } +#ifdef CONFIG_PPC64 + if (test_tsk_thread_flag(task, TIF_32BIT)) { + /* + * Zero-extend 32-bit argument values. The high bits are + * garbage ignored by the actual syscall dispatch. + */ + while (n-- > 0) + args[n] = (u32) regs->gpr[3 + i + n]; + return; + } +#endif memcpy(args, ®s->gpr[3 + i], n * sizeof(args[0])); } #endif @@ -324,22 +335,22 @@ __ia64_syscall_get_arguments(struct task_struct *task, struct pt_regs *regs, switch (i) { case 0: if (!n--) break; - *args++ = *__ia64_fetch_register(i + 32, regs, cache); + *args++ = ia64_fetch_register(32, regs, cache); case 1: if (!n--) break; - *args++ = *__ia64_fetch_register(i + 33, regs, cache); + *args++ = ia64_fetch_register(33, regs, cache); case 2: if (!n--) break; - *args++ = *__ia64_fetch_register(i + 34, regs, cache); + *args++ = ia64_fetch_register(34, regs, cache); case 3: if (!n--) break; - *args++ = *__ia64_fetch_register(i + 35, regs, cache); + *args++ = ia64_fetch_register(35, regs, cache); case 4: if (!n--) break; - *args++ = *__ia64_fetch_register(i + 36, regs, cache); + *args++ = ia64_fetch_register(36, regs, cache); case 5: if (!n--) break; - *args++ = *__ia64_fetch_register(i + 37, regs, cache); + *args++ = ia64_fetch_register(37, regs, cache); } } #endif |