/*
* Since the FPR[0-31] is stored in the first double word of VSR[0-31] and
* FPR are saved through the FP state, there is no need to save the upper part
* of the first 32 VSX registers.
* Furthermore, the 32 last VSX registers are also the 32 Altivec registers
* already saved, so no need to save them.
* As a consequence, only the doubleword 1 of the 32 first VSX registers have
* to be saved (the ones are returned by PTRACE_GETVSRREGS).
*/
static int get_vsx_regs(pid_t pid, CoreEntry *core)
{
UserPpc64VsxstateEntry *vse;
uint64_t vsregs[32];
int i;
if (ptrace(PTRACE_GETVSRREGS, pid, 0, (void*)&vsregs) < 0) {
/*
* EIO is returned in the case PTRACE_GETVRREGS is not
* supported.
*/
if (errno == EIO) {
pr_debug("VSX register's dump not supported.\n");
return 0;
}
pr_perror("Couldn't get VSX registers");
return -1;
}
pr_debug("Dumping VSX registers\n");
vse = xmalloc(sizeof(*vse));
if (!vse)
return -1;
user_ppc64_vsxstate_entry__init(vse);
vse->n_vsxregs = 32;
vse->vsxregs = xmalloc(vse->n_vsxregs * sizeof(vse->vsxregs[0]));
if (!vse->vsxregs) {
xfree(vse);
return -1;
}
for (i = 0; i < vse->n_vsxregs; i++)
vse->vsxregs[i] = vsregs[i];
core->ti_ppc64->vsxstate = vse;
/*
* Force the MSR_VSX bit of the restored MSR otherwise the kernel
* will not restore them from the signal frame.
*/
core->ti_ppc64->gpregs->msr |= MSR_VSX;
return 0;
}
static UserPpc64VsxstateEntry* copy_vsx_regs(uint64_t *vsregs)
{
UserPpc64VsxstateEntry *vse;
int i;
vse = xmalloc(sizeof(*vse));
if (!vse)
return NULL;
user_ppc64_vsxstate_entry__init(vse);
vse->n_vsxregs = NVSXREG;
vse->vsxregs = xmalloc(vse->n_vsxregs*sizeof(vse->vsxregs[0]));
if (!vse->vsxregs) {
xfree(vse);
return NULL;
}
for (i = 0; i < vse->n_vsxregs; i++)
vse->vsxregs[i] = vsregs[i];
return vse;
}
