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Implement minimal ptrace support for ppc64[le]-linux.

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This commit is contained in:
Mark Wielaard 2018-12-12 14:11:29 +01:00
parent 43fe4bc236
commit 2e2ae5bda8
3 changed files with 70 additions and 3 deletions
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1
NEWS
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@ -71,6 +71,7 @@ where XXXXXX is the bug number as listed below.
401627 memcheck errors with glibc avx2 optimized wcsncmp
401822 none/tests/ppc64/jm-vmx fails and produces assembler warnings
402006 mark helper regs defined in final_tidyup before freeres_wrapper call
402048 WARNING: unhandled ppc64[be|le]-linux syscall: 26 (ptrace)
Release 3.14.0 (9 October 2018)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

70
coregrind/m_syswrap/syswrap-ppc64-linux.c
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@ -388,6 +388,7 @@ DECL_TEMPLATE(ppc64_linux, sys_mmap);
//zz DECL_TEMPLATE(ppc64_linux, sys_sigreturn);
DECL_TEMPLATE(ppc64_linux, sys_rt_sigreturn);
DECL_TEMPLATE(ppc64_linux, sys_fadvise64);
DECL_TEMPLATE(ppc64_linux, sys_ptrace);
PRE(sys_mmap)
{
@ -511,6 +512,72 @@ PRE(sys_rt_sigreturn)
*flags |= SfPollAfter;
}
// ARG3 is only used for pointers into the traced process's address
// space and for offsets into the traced process's struct
// user_regs_struct. It is never a pointer into this process's memory
// space, and we should therefore not check anything it points to.
// powerpc does have other ways to get/set registers, we only support
// GET/SETREGSET for now.
PRE(sys_ptrace)
{
PRINT("sys_ptrace ( %ld, %ld, %#lx, %#lx )", ARG1,ARG2,ARG3,ARG4);
PRE_REG_READ4(int, "ptrace",
long, request, long, pid, long, addr, long, data);
switch (ARG1) {
case VKI_PTRACE_PEEKTEXT:
case VKI_PTRACE_PEEKDATA:
case VKI_PTRACE_PEEKUSR:
PRE_MEM_WRITE( "ptrace(peek)", ARG4,
sizeof (long));
break;
case VKI_PTRACE_GETEVENTMSG:
PRE_MEM_WRITE( "ptrace(geteventmsg)", ARG4, sizeof(unsigned long));
break;
case VKI_PTRACE_GETSIGINFO:
PRE_MEM_WRITE( "ptrace(getsiginfo)", ARG4, sizeof(vki_siginfo_t));
break;
case VKI_PTRACE_SETSIGINFO:
PRE_MEM_READ( "ptrace(setsiginfo)", ARG4, sizeof(vki_siginfo_t));
break;
case VKI_PTRACE_GETREGSET:
ML_(linux_PRE_getregset)(tid, ARG3, ARG4);
break;
case VKI_PTRACE_SETREGSET:
ML_(linux_PRE_setregset)(tid, ARG3, ARG4);
break;
default:
break;
}
}
POST(sys_ptrace)
{
switch (ARG1) {
case VKI_PTRACE_TRACEME:
ML_(linux_POST_traceme)(tid);
break;
case VKI_PTRACE_PEEKTEXT:
case VKI_PTRACE_PEEKDATA:
case VKI_PTRACE_PEEKUSR:
POST_MEM_WRITE( ARG4, sizeof (long));
break;
case VKI_PTRACE_GETEVENTMSG:
POST_MEM_WRITE( ARG4, sizeof(unsigned long));
break;
case VKI_PTRACE_GETSIGINFO:
/* XXX: This is a simplification. Different parts of the
* siginfo_t are valid depending on the type of signal.
*/
POST_MEM_WRITE( ARG4, sizeof(vki_siginfo_t));
break;
case VKI_PTRACE_GETREGSET:
ML_(linux_POST_getregset)(tid, ARG3, ARG4);
break;
default:
break;
}
}
#undef PRE
#undef POST
@ -562,8 +629,7 @@ static SyscallTableEntry syscall_table[] = {
GENX_(__NR_getuid, sys_getuid), // 24
// _____(__NR_stime, sys_stime), // 25
// When ptrace is supported, memcheck/tests/linux/getregset should be enabled
// _____(__NR_ptrace, sys_ptrace), // 26
PLAXY(__NR_ptrace, sys_ptrace), // 26
GENX_(__NR_alarm, sys_alarm), // 27
// _____(__NR_oldfstat, sys_oldfstat), // 28
GENX_(__NR_pause, sys_pause), // 29

2
memcheck/tests/linux/getregset.vgtest
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@ -1,4 +1,4 @@
prog: getregset
vgopts: -q
prereq: ((../../../tests/os_test linux 2.6.33 && ! ../../../tests/arch_test mips32) || ../../../tests/os_test linux 3.10.0 ) && ! ../../../tests/arch_test ppc64
prereq: ((../../../tests/os_test linux 2.6.33 && ! ../../../tests/arch_test mips32) || ../../../tests/os_test linux 3.10.0 )