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qemu/target/ppc/arch_dump.c
Omar Sandoval 2587a57dbb target/ppc/arch_dump: set prstatus pid to cpuid 
Every other architecture does this, and debuggers need it to be able to
identify which prstatus note corresponds to which CPU.

Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Harsh Prateek Bora <harshpb@linux.ibm.com>
Signed-off-by: Omar Sandoval <osandov@osandov.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
2024-07-26 09:21:06 +10:00

316 lines
8.5 KiB
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/*
* writing ELF notes for ppc{64,} arch
*
*
* Copyright IBM, Corp. 2013
*
* Authors:
* Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
*
* This work is licensed under the terms of the GNU GPL, version 2. See
* the COPYING file in the top-level directory.
*
*/
#include "qemu/osdep.h"
#include "cpu.h"
#include "elf.h"
#include "sysemu/dump.h"
#include "sysemu/kvm.h"
#ifdef TARGET_PPC64
#define ELFCLASS ELFCLASS64
#define cpu_to_dump_reg cpu_to_dump64
typedef uint64_t reg_t;
typedef Elf64_Nhdr Elf_Nhdr;
#else
#define ELFCLASS ELFCLASS32
#define cpu_to_dump_reg cpu_to_dump32
typedef uint32_t reg_t;
typedef Elf32_Nhdr Elf_Nhdr;
#endif /* TARGET_PPC64 */
struct PPCUserRegStruct {
reg_t gpr[32];
reg_t nip;
reg_t msr;
reg_t orig_gpr3;
reg_t ctr;
reg_t link;
reg_t xer;
reg_t ccr;
reg_t softe;
reg_t trap;
reg_t dar;
reg_t dsisr;
reg_t result;
} QEMU_PACKED;
struct PPCElfPrstatus {
char pad1[32]; /* 32 == offsetof(struct elf_prstatus, pr_pid) */
uint32_t pid;
char pad2[76]; /* 76 == offsetof(struct elf_prstatus, pr_reg) -
offsetof(struct elf_prstatus, pr_ppid) */
struct PPCUserRegStruct pr_reg;
char pad3[40]; /* 40 == sizeof(struct elf_prstatus) -
offsetof(struct elf_prstatus, pr_reg) -
sizeof(struct user_pt_regs) */
} QEMU_PACKED;
struct PPCElfFpregset {
uint64_t fpr[32];
reg_t fpscr;
} QEMU_PACKED;
struct PPCElfVmxregset {
ppc_avr_t avr[32];
ppc_avr_t vscr;
union {
ppc_avr_t unused;
uint32_t value;
} vrsave;
} QEMU_PACKED;
struct PPCElfVsxregset {
uint64_t vsr[32];
} QEMU_PACKED;
struct PPCElfSperegset {
uint32_t evr[32];
uint64_t spe_acc;
uint32_t spe_fscr;
} QEMU_PACKED;
typedef struct noteStruct {
Elf_Nhdr hdr;
char name[5];
char pad3[3];
union {
struct PPCElfPrstatus prstatus;
struct PPCElfFpregset fpregset;
struct PPCElfVmxregset vmxregset;
struct PPCElfVsxregset vsxregset;
struct PPCElfSperegset speregset;
} contents;
} QEMU_PACKED Note;
typedef struct NoteFuncArg {
Note note;
DumpState *state;
} NoteFuncArg;
static void ppc_write_elf_prstatus(NoteFuncArg *arg, PowerPCCPU *cpu, int id)
{
int i;
reg_t cr;
struct PPCElfPrstatus *prstatus;
struct PPCUserRegStruct *reg;
Note *note = &arg->note;
DumpState *s = arg->state;
note->hdr.n_type = cpu_to_dump32(s, NT_PRSTATUS);
prstatus = &note->contents.prstatus;
memset(prstatus, 0, sizeof(*prstatus));
prstatus->pid = cpu_to_dump32(s, id);
reg = &prstatus->pr_reg;
for (i = 0; i < 32; i++) {
reg->gpr[i] = cpu_to_dump_reg(s, cpu->env.gpr[i]);
}
reg->nip = cpu_to_dump_reg(s, cpu->env.nip);
reg->msr = cpu_to_dump_reg(s, cpu->env.msr);
reg->ctr = cpu_to_dump_reg(s, cpu->env.ctr);
reg->link = cpu_to_dump_reg(s, cpu->env.lr);
reg->xer = cpu_to_dump_reg(s, cpu_read_xer(&cpu->env));
cr = 0;
for (i = 0; i < 8; i++) {
cr |= (cpu->env.crf[i] & 15) << (4 * (7 - i));
}
reg->ccr = cpu_to_dump_reg(s, cr);
}
static void ppc_write_elf_fpregset(NoteFuncArg *arg, PowerPCCPU *cpu, int id)
{
int i;
struct PPCElfFpregset *fpregset;
Note *note = &arg->note;
DumpState *s = arg->state;
note->hdr.n_type = cpu_to_dump32(s, NT_PRFPREG);
fpregset = &note->contents.fpregset;
memset(fpregset, 0, sizeof(*fpregset));
for (i = 0; i < 32; i++) {
uint64_t *fpr = cpu_fpr_ptr(&cpu->env, i);
fpregset->fpr[i] = cpu_to_dump64(s, *fpr);
}
fpregset->fpscr = cpu_to_dump_reg(s, cpu->env.fpscr);
}
static void ppc_write_elf_vmxregset(NoteFuncArg *arg, PowerPCCPU *cpu, int id)
{
int i;
struct PPCElfVmxregset *vmxregset;
Note *note = &arg->note;
DumpState *s = arg->state;
note->hdr.n_type = cpu_to_dump32(s, NT_PPC_VMX);
vmxregset = &note->contents.vmxregset;
memset(vmxregset, 0, sizeof(*vmxregset));
for (i = 0; i < 32; i++) {
bool needs_byteswap;
ppc_avr_t *avr = cpu_avr_ptr(&cpu->env, i);
#if HOST_BIG_ENDIAN
needs_byteswap = s->dump_info.d_endian == ELFDATA2LSB;
#else
needs_byteswap = s->dump_info.d_endian == ELFDATA2MSB;
#endif
if (needs_byteswap) {
vmxregset->avr[i].u64[0] = bswap64(avr->u64[1]);
vmxregset->avr[i].u64[1] = bswap64(avr->u64[0]);
} else {
vmxregset->avr[i].u64[0] = avr->u64[0];
vmxregset->avr[i].u64[1] = avr->u64[1];
}
}
vmxregset->vscr.u32[3] = cpu_to_dump32(s, ppc_get_vscr(&cpu->env));
}
static void ppc_write_elf_vsxregset(NoteFuncArg *arg, PowerPCCPU *cpu, int id)
{
int i;
struct PPCElfVsxregset *vsxregset;
Note *note = &arg->note;
DumpState *s = arg->state;
note->hdr.n_type = cpu_to_dump32(s, NT_PPC_VSX);
vsxregset = &note->contents.vsxregset;
memset(vsxregset, 0, sizeof(*vsxregset));
for (i = 0; i < 32; i++) {
uint64_t *vsrl = cpu_vsrl_ptr(&cpu->env, i);
vsxregset->vsr[i] = cpu_to_dump64(s, *vsrl);
}
}
static void ppc_write_elf_speregset(NoteFuncArg *arg, PowerPCCPU *cpu, int id)
{
struct PPCElfSperegset *speregset;
Note *note = &arg->note;
DumpState *s = arg->state;
note->hdr.n_type = cpu_to_dump32(s, NT_PPC_SPE);
speregset = &note->contents.speregset;
memset(speregset, 0, sizeof(*speregset));
speregset->spe_acc = cpu_to_dump64(s, cpu->env.spe_acc);
speregset->spe_fscr = cpu_to_dump32(s, cpu->env.spe_fscr);
}
static const struct NoteFuncDescStruct {
int contents_size;
void (*note_contents_func)(NoteFuncArg *arg, PowerPCCPU *cpu, int id);
} note_func[] = {
{sizeof_field(Note, contents.prstatus), ppc_write_elf_prstatus},
{sizeof_field(Note, contents.fpregset), ppc_write_elf_fpregset},
{sizeof_field(Note, contents.vmxregset), ppc_write_elf_vmxregset},
{sizeof_field(Note, contents.vsxregset), ppc_write_elf_vsxregset},
{sizeof_field(Note, contents.speregset), ppc_write_elf_speregset},
{ 0, NULL}
};
typedef struct NoteFuncDescStruct NoteFuncDesc;
int cpu_get_dump_info(ArchDumpInfo *info,
const struct GuestPhysBlockList *guest_phys_blocks)
{
PowerPCCPU *cpu;
if (first_cpu == NULL) {
return -1;
}
cpu = POWERPC_CPU(first_cpu);
info->d_machine = PPC_ELF_MACHINE;
info->d_class = ELFCLASS;
if (ppc_interrupts_little_endian(cpu, !!(cpu->env.msr_mask & MSR_HVB))) {
info->d_endian = ELFDATA2LSB;
} else {
info->d_endian = ELFDATA2MSB;
}
/* 64KB is the max page size for pseries kernel */
if (strncmp(object_get_typename(qdev_get_machine()),
"pseries-", 8) == 0) {
info->page_size = (1U << 16);
}
return 0;
}
ssize_t cpu_get_note_size(int class, int machine, int nr_cpus)
{
int name_size = 8; /* "CORE" or "QEMU" rounded */
size_t elf_note_size = 0;
int note_head_size;
const NoteFuncDesc *nf;
note_head_size = sizeof(Elf_Nhdr);
for (nf = note_func; nf->note_contents_func; nf++) {
elf_note_size = elf_note_size + note_head_size + name_size +
nf->contents_size;
}
return (elf_note_size) * nr_cpus;
}
static int ppc_write_all_elf_notes(const char *note_name,
WriteCoreDumpFunction f,
PowerPCCPU *cpu, int id,
DumpState *s)
{
NoteFuncArg arg = { .state = s };
int ret = -1;
int note_size;
const NoteFuncDesc *nf;
for (nf = note_func; nf->note_contents_func; nf++) {
arg.note.hdr.n_namesz = cpu_to_dump32(s, sizeof(arg.note.name));
arg.note.hdr.n_descsz = cpu_to_dump32(s, nf->contents_size);
strncpy(arg.note.name, note_name, sizeof(arg.note.name));
(*nf->note_contents_func)(&arg, cpu, id);
note_size =
sizeof(arg.note) - sizeof(arg.note.contents) + nf->contents_size;
ret = f(&arg.note, note_size, s);
if (ret < 0) {
return -1;
}
}
return 0;
}
int ppc64_cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cs,
int cpuid, DumpState *s)
{
PowerPCCPU *cpu = POWERPC_CPU(cs);
return ppc_write_all_elf_notes("CORE", f, cpu, cpuid, s);
}
int ppc32_cpu_write_elf32_note(WriteCoreDumpFunction f, CPUState *cs,
int cpuid, DumpState *s)
{
PowerPCCPU *cpu = POWERPC_CPU(cs);
return ppc_write_all_elf_notes("CORE", f, cpu, cpuid, s);
}
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