mirror of https://gitee.com/openkylin/qemu.git
310 lines
8.0 KiB
C
310 lines
8.0 KiB
C
/*
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* writing ELF notes for ppc{64,} arch
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*
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*
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* Copyright IBM, Corp. 2013
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*
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* Authors:
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* Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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*/
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#include "qemu/osdep.h"
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#include "cpu.h"
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#include "elf.h"
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#include "exec/cpu-all.h"
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#include "sysemu/dump.h"
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#include "sysemu/kvm.h"
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#ifdef TARGET_PPC64
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#define ELFCLASS ELFCLASS64
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#define cpu_to_dump_reg cpu_to_dump64
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typedef uint64_t reg_t;
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typedef Elf64_Nhdr Elf_Nhdr;
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#else
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#define ELFCLASS ELFCLASS32
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#define cpu_to_dump_reg cpu_to_dump32
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typedef uint32_t reg_t;
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typedef Elf32_Nhdr Elf_Nhdr;
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#endif /* TARGET_PPC64 */
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struct PPCUserRegStruct {
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reg_t gpr[32];
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reg_t nip;
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reg_t msr;
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reg_t orig_gpr3;
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reg_t ctr;
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reg_t link;
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reg_t xer;
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reg_t ccr;
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reg_t softe;
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reg_t trap;
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reg_t dar;
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reg_t dsisr;
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reg_t result;
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} QEMU_PACKED;
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struct PPCElfPrstatus {
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char pad1[112];
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struct PPCUserRegStruct pr_reg;
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char pad2[40];
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} QEMU_PACKED;
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struct PPCElfFpregset {
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uint64_t fpr[32];
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reg_t fpscr;
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} QEMU_PACKED;
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struct PPCElfVmxregset {
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ppc_avr_t avr[32];
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ppc_avr_t vscr;
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union {
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ppc_avr_t unused;
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uint32_t value;
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} vrsave;
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} QEMU_PACKED;
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struct PPCElfVsxregset {
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uint64_t vsr[32];
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} QEMU_PACKED;
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struct PPCElfSperegset {
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uint32_t evr[32];
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uint64_t spe_acc;
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uint32_t spe_fscr;
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} QEMU_PACKED;
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typedef struct noteStruct {
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Elf_Nhdr hdr;
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char name[5];
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char pad3[3];
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union {
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struct PPCElfPrstatus prstatus;
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struct PPCElfFpregset fpregset;
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struct PPCElfVmxregset vmxregset;
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struct PPCElfVsxregset vsxregset;
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struct PPCElfSperegset speregset;
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} contents;
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} QEMU_PACKED Note;
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typedef struct NoteFuncArg {
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Note note;
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DumpState *state;
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} NoteFuncArg;
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static void ppc_write_elf_prstatus(NoteFuncArg *arg, PowerPCCPU *cpu)
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{
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int i;
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reg_t cr;
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struct PPCElfPrstatus *prstatus;
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struct PPCUserRegStruct *reg;
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Note *note = &arg->note;
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DumpState *s = arg->state;
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note->hdr.n_type = cpu_to_dump32(s, NT_PRSTATUS);
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prstatus = ¬e->contents.prstatus;
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memset(prstatus, 0, sizeof(*prstatus));
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reg = &prstatus->pr_reg;
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for (i = 0; i < 32; i++) {
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reg->gpr[i] = cpu_to_dump_reg(s, cpu->env.gpr[i]);
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}
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reg->nip = cpu_to_dump_reg(s, cpu->env.nip);
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reg->msr = cpu_to_dump_reg(s, cpu->env.msr);
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reg->ctr = cpu_to_dump_reg(s, cpu->env.ctr);
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reg->link = cpu_to_dump_reg(s, cpu->env.lr);
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reg->xer = cpu_to_dump_reg(s, cpu_read_xer(&cpu->env));
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cr = 0;
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for (i = 0; i < 8; i++) {
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cr |= (cpu->env.crf[i] & 15) << (4 * (7 - i));
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}
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reg->ccr = cpu_to_dump_reg(s, cr);
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}
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static void ppc_write_elf_fpregset(NoteFuncArg *arg, PowerPCCPU *cpu)
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{
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int i;
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struct PPCElfFpregset *fpregset;
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Note *note = &arg->note;
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DumpState *s = arg->state;
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note->hdr.n_type = cpu_to_dump32(s, NT_PRFPREG);
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fpregset = ¬e->contents.fpregset;
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memset(fpregset, 0, sizeof(*fpregset));
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for (i = 0; i < 32; i++) {
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fpregset->fpr[i] = cpu_to_dump64(s, cpu->env.fpr[i]);
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}
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fpregset->fpscr = cpu_to_dump_reg(s, cpu->env.fpscr);
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}
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static void ppc_write_elf_vmxregset(NoteFuncArg *arg, PowerPCCPU *cpu)
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{
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int i;
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struct PPCElfVmxregset *vmxregset;
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Note *note = &arg->note;
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DumpState *s = arg->state;
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note->hdr.n_type = cpu_to_dump32(s, NT_PPC_VMX);
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vmxregset = ¬e->contents.vmxregset;
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memset(vmxregset, 0, sizeof(*vmxregset));
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for (i = 0; i < 32; i++) {
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bool needs_byteswap;
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#ifdef HOST_WORDS_BIGENDIAN
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needs_byteswap = s->dump_info.d_endian == ELFDATA2LSB;
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#else
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needs_byteswap = s->dump_info.d_endian == ELFDATA2MSB;
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#endif
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if (needs_byteswap) {
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vmxregset->avr[i].u64[0] = bswap64(cpu->env.avr[i].u64[1]);
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vmxregset->avr[i].u64[1] = bswap64(cpu->env.avr[i].u64[0]);
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} else {
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vmxregset->avr[i].u64[0] = cpu->env.avr[i].u64[0];
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vmxregset->avr[i].u64[1] = cpu->env.avr[i].u64[1];
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}
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}
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vmxregset->vscr.u32[3] = cpu_to_dump32(s, cpu->env.vscr);
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}
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static void ppc_write_elf_vsxregset(NoteFuncArg *arg, PowerPCCPU *cpu)
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{
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int i;
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struct PPCElfVsxregset *vsxregset;
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Note *note = &arg->note;
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DumpState *s = arg->state;
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note->hdr.n_type = cpu_to_dump32(s, NT_PPC_VSX);
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vsxregset = ¬e->contents.vsxregset;
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memset(vsxregset, 0, sizeof(*vsxregset));
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for (i = 0; i < 32; i++) {
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vsxregset->vsr[i] = cpu_to_dump64(s, cpu->env.vsr[i]);
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}
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}
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static void ppc_write_elf_speregset(NoteFuncArg *arg, PowerPCCPU *cpu)
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{
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struct PPCElfSperegset *speregset;
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Note *note = &arg->note;
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DumpState *s = arg->state;
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note->hdr.n_type = cpu_to_dump32(s, NT_PPC_SPE);
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speregset = ¬e->contents.speregset;
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memset(speregset, 0, sizeof(*speregset));
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speregset->spe_acc = cpu_to_dump64(s, cpu->env.spe_acc);
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speregset->spe_fscr = cpu_to_dump32(s, cpu->env.spe_fscr);
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}
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static const struct NoteFuncDescStruct {
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int contents_size;
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void (*note_contents_func)(NoteFuncArg *arg, PowerPCCPU *cpu);
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} note_func[] = {
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{sizeof(((Note *)0)->contents.prstatus), ppc_write_elf_prstatus},
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{sizeof(((Note *)0)->contents.fpregset), ppc_write_elf_fpregset},
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{sizeof(((Note *)0)->contents.vmxregset), ppc_write_elf_vmxregset},
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{sizeof(((Note *)0)->contents.vsxregset), ppc_write_elf_vsxregset},
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{sizeof(((Note *)0)->contents.speregset), ppc_write_elf_speregset},
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{ 0, NULL}
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};
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typedef struct NoteFuncDescStruct NoteFuncDesc;
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int cpu_get_dump_info(ArchDumpInfo *info,
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const struct GuestPhysBlockList *guest_phys_blocks)
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{
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PowerPCCPU *cpu;
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PowerPCCPUClass *pcc;
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if (first_cpu == NULL) {
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return -1;
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}
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cpu = POWERPC_CPU(first_cpu);
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pcc = POWERPC_CPU_GET_CLASS(cpu);
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info->d_machine = PPC_ELF_MACHINE;
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info->d_class = ELFCLASS;
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if ((*pcc->interrupts_big_endian)(cpu)) {
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info->d_endian = ELFDATA2MSB;
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} else {
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info->d_endian = ELFDATA2LSB;
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}
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/* 64KB is the max page size for pseries kernel */
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if (strncmp(object_get_typename(qdev_get_machine()),
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"pseries-", 8) == 0) {
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info->page_size = (1U << 16);
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}
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return 0;
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}
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ssize_t cpu_get_note_size(int class, int machine, int nr_cpus)
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{
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int name_size = 8; /* "CORE" or "QEMU" rounded */
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size_t elf_note_size = 0;
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int note_head_size;
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const NoteFuncDesc *nf;
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note_head_size = sizeof(Elf_Nhdr);
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for (nf = note_func; nf->note_contents_func; nf++) {
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elf_note_size = elf_note_size + note_head_size + name_size +
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nf->contents_size;
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}
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return (elf_note_size) * nr_cpus;
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}
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static int ppc_write_all_elf_notes(const char *note_name,
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WriteCoreDumpFunction f,
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PowerPCCPU *cpu, int id,
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void *opaque)
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{
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NoteFuncArg arg = { .state = opaque };
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int ret = -1;
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int note_size;
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const NoteFuncDesc *nf;
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for (nf = note_func; nf->note_contents_func; nf++) {
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arg.note.hdr.n_namesz = cpu_to_dump32(opaque, sizeof(arg.note.name));
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arg.note.hdr.n_descsz = cpu_to_dump32(opaque, nf->contents_size);
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strncpy(arg.note.name, note_name, sizeof(arg.note.name));
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(*nf->note_contents_func)(&arg, cpu);
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note_size =
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sizeof(arg.note) - sizeof(arg.note.contents) + nf->contents_size;
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ret = f(&arg.note, note_size, opaque);
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if (ret < 0) {
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return -1;
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}
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}
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return 0;
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}
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int ppc64_cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cs,
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int cpuid, void *opaque)
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{
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PowerPCCPU *cpu = POWERPC_CPU(cs);
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return ppc_write_all_elf_notes("CORE", f, cpu, cpuid, opaque);
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}
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int ppc32_cpu_write_elf32_note(WriteCoreDumpFunction f, CPUState *cs,
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int cpuid, void *opaque)
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{
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PowerPCCPU *cpu = POWERPC_CPU(cs);
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return ppc_write_all_elf_notes("CORE", f, cpu, cpuid, opaque);
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}
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