59da21398e
syscall_get_nr() currently returns a valid result only if the call chain of the traced process includes do_syscall_trace_enter(). But collect_syscall() can be called for any sleeping task, the result of syscall_get_nr() in general is completely bogus. To make syscall_get_nr() work for any sleeping task the traps field in pt_regs is replace with svcnr - the system call number the process is executing. If svcnr == 0 the process is not on a system call path. The syscall_get_arguments and syscall_set_arguments use regs->gprs[2] for the first system call parameter. This is incorrect since gprs[2] may have been overwritten with the system call number if the call chain includes do_syscall_trace_enter. Use regs->orig_gprs2 instead. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
42 lines
1.7 KiB
C
42 lines
1.7 KiB
C
/*
|
|
* Generate definitions needed by assembly language modules.
|
|
* This code generates raw asm output which is post-processed to extract
|
|
* and format the required data.
|
|
*/
|
|
|
|
#include <linux/sched.h>
|
|
#include <linux/kbuild.h>
|
|
|
|
int main(void)
|
|
{
|
|
DEFINE(__THREAD_info, offsetof(struct task_struct, stack));
|
|
DEFINE(__THREAD_ksp, offsetof(struct task_struct, thread.ksp));
|
|
DEFINE(__THREAD_per, offsetof(struct task_struct, thread.per_info));
|
|
DEFINE(__THREAD_mm_segment,
|
|
offsetof(struct task_struct, thread.mm_segment));
|
|
BLANK();
|
|
DEFINE(__TASK_pid, offsetof(struct task_struct, pid));
|
|
BLANK();
|
|
DEFINE(__PER_atmid, offsetof(per_struct, lowcore.words.perc_atmid));
|
|
DEFINE(__PER_address, offsetof(per_struct, lowcore.words.address));
|
|
DEFINE(__PER_access_id, offsetof(per_struct, lowcore.words.access_id));
|
|
BLANK();
|
|
DEFINE(__TI_task, offsetof(struct thread_info, task));
|
|
DEFINE(__TI_domain, offsetof(struct thread_info, exec_domain));
|
|
DEFINE(__TI_flags, offsetof(struct thread_info, flags));
|
|
DEFINE(__TI_cpu, offsetof(struct thread_info, cpu));
|
|
DEFINE(__TI_precount, offsetof(struct thread_info, preempt_count));
|
|
BLANK();
|
|
DEFINE(__PT_ARGS, offsetof(struct pt_regs, args));
|
|
DEFINE(__PT_PSW, offsetof(struct pt_regs, psw));
|
|
DEFINE(__PT_GPRS, offsetof(struct pt_regs, gprs));
|
|
DEFINE(__PT_ORIG_GPR2, offsetof(struct pt_regs, orig_gpr2));
|
|
DEFINE(__PT_ILC, offsetof(struct pt_regs, ilc));
|
|
DEFINE(__PT_SVCNR, offsetof(struct pt_regs, svcnr));
|
|
DEFINE(__PT_SIZE, sizeof(struct pt_regs));
|
|
BLANK();
|
|
DEFINE(__SF_BACKCHAIN, offsetof(struct stack_frame, back_chain));
|
|
DEFINE(__SF_GPRS, offsetof(struct stack_frame, gprs));
|
|
DEFINE(__SF_EMPTY, offsetof(struct stack_frame, empty1));
|
|
return 0;
|
|
}
|