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Make use of the new Altivec ptrace support, to save the Altivec registers in

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gcore.

MFC after:	2 weeks
Relnotes:	yes
This commit is contained in:
Justin Hibbits 2015-01-14 07:02:21 +00:00
parent 64b83a0576
commit b5d4909ec3
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=277167
1 changed files with 32 additions and 0 deletions
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32
usr.bin/gcore/elfcore.c
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@ -105,6 +105,9 @@ static void *elf_note_thrmisc(void *, size_t *);
#if defined(__i386__) || defined(__amd64__)
static void *elf_note_x86_xstate(void *, size_t *);
#endif
#if defined(__powerpc__)
static void *elf_note_powerpc_vmx(void *, size_t *);
#endif
static void *elf_note_procstat_auxv(void *, size_t *);
static void *elf_note_procstat_files(void *, size_t *);
static void *elf_note_procstat_groups(void *, size_t *);
@ -347,6 +350,9 @@ elf_putnotes(pid_t pid, struct sbuf *sb, size_t *sizep)
elf_putnote(NT_THRMISC, elf_note_thrmisc, tids + i, sb);
#if defined(__i386__) || defined(__amd64__)
elf_putnote(NT_X86_XSTATE, elf_note_x86_xstate, tids + i, sb);
#endif
#if defined(__powerpc__)
elf_putnote(NT_PPC_VMX, elf_note_powerpc_vmx, tids + i, sb);
#endif
}
@ -650,6 +656,32 @@ elf_note_x86_xstate(void *arg, size_t *sizep)
}
#endif
#if defined(__powerpc__)
static void *
elf_note_powerpc_vmx(void *arg, size_t *sizep)
{
lwpid_t tid;
struct vmxreg *vmx;
static bool has_vmx = true;
struct vmxreg info;
tid = *(lwpid_t *)arg;
if (has_vmx) {
if (ptrace(PT_GETVRREGS, tid, (void *)&info,
sizeof(info)) != 0)
has_vmx = false;
}
if (!has_vmx) {
*sizep = 0;
return (NULL);
}
vmx = calloc(1, sizeof(*vmx));
memcpy(vmx, &info, sizeof(*vmx));
*sizep = sizeof(*vmx);
return (vmx);
}
#endif
static void *
procstat_sysctl(void *arg, int what, size_t structsz, size_t *sizep)
{