1fcf5ef2aSThomas Huth /*
2356bb70eSMike Nawrocki * writing ELF notes for ppc{64,} arch
3fcf5ef2aSThomas Huth *
4fcf5ef2aSThomas Huth *
5fcf5ef2aSThomas Huth * Copyright IBM, Corp. 2013
6fcf5ef2aSThomas Huth *
7fcf5ef2aSThomas Huth * Authors:
8fcf5ef2aSThomas Huth * Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
9fcf5ef2aSThomas Huth *
10fcf5ef2aSThomas Huth * This work is licensed under the terms of the GNU GPL, version 2. See
11fcf5ef2aSThomas Huth * the COPYING file in the top-level directory.
12fcf5ef2aSThomas Huth *
13fcf5ef2aSThomas Huth */
14fcf5ef2aSThomas Huth
15fcf5ef2aSThomas Huth #include "qemu/osdep.h"
16fcf5ef2aSThomas Huth #include "cpu.h"
17fcf5ef2aSThomas Huth #include "elf.h"
18fcf5ef2aSThomas Huth #include "sysemu/dump.h"
19fcf5ef2aSThomas Huth #include "sysemu/kvm.h"
20fcf5ef2aSThomas Huth
21356bb70eSMike Nawrocki #ifdef TARGET_PPC64
22356bb70eSMike Nawrocki #define ELFCLASS ELFCLASS64
23356bb70eSMike Nawrocki #define cpu_to_dump_reg cpu_to_dump64
24356bb70eSMike Nawrocki typedef uint64_t reg_t;
25356bb70eSMike Nawrocki typedef Elf64_Nhdr Elf_Nhdr;
26356bb70eSMike Nawrocki #else
27356bb70eSMike Nawrocki #define ELFCLASS ELFCLASS32
28356bb70eSMike Nawrocki #define cpu_to_dump_reg cpu_to_dump32
29356bb70eSMike Nawrocki typedef uint32_t reg_t;
30356bb70eSMike Nawrocki typedef Elf32_Nhdr Elf_Nhdr;
31356bb70eSMike Nawrocki #endif /* TARGET_PPC64 */
32356bb70eSMike Nawrocki
33356bb70eSMike Nawrocki struct PPCUserRegStruct {
34356bb70eSMike Nawrocki reg_t gpr[32];
35356bb70eSMike Nawrocki reg_t nip;
36356bb70eSMike Nawrocki reg_t msr;
37356bb70eSMike Nawrocki reg_t orig_gpr3;
38356bb70eSMike Nawrocki reg_t ctr;
39356bb70eSMike Nawrocki reg_t link;
40356bb70eSMike Nawrocki reg_t xer;
41356bb70eSMike Nawrocki reg_t ccr;
42356bb70eSMike Nawrocki reg_t softe;
43356bb70eSMike Nawrocki reg_t trap;
44356bb70eSMike Nawrocki reg_t dar;
45356bb70eSMike Nawrocki reg_t dsisr;
46356bb70eSMike Nawrocki reg_t result;
47fcf5ef2aSThomas Huth } QEMU_PACKED;
48fcf5ef2aSThomas Huth
49356bb70eSMike Nawrocki struct PPCElfPrstatus {
50fcf5ef2aSThomas Huth char pad1[112];
51356bb70eSMike Nawrocki struct PPCUserRegStruct pr_reg;
52b88290cdSAnton Blanchard char pad2[40];
53fcf5ef2aSThomas Huth } QEMU_PACKED;
54fcf5ef2aSThomas Huth
55fcf5ef2aSThomas Huth
56356bb70eSMike Nawrocki struct PPCElfFpregset {
57fcf5ef2aSThomas Huth uint64_t fpr[32];
58356bb70eSMike Nawrocki reg_t fpscr;
59fcf5ef2aSThomas Huth } QEMU_PACKED;
60fcf5ef2aSThomas Huth
61fcf5ef2aSThomas Huth
62356bb70eSMike Nawrocki struct PPCElfVmxregset {
63fcf5ef2aSThomas Huth ppc_avr_t avr[32];
64fcf5ef2aSThomas Huth ppc_avr_t vscr;
65fcf5ef2aSThomas Huth union {
66fcf5ef2aSThomas Huth ppc_avr_t unused;
67fcf5ef2aSThomas Huth uint32_t value;
68fcf5ef2aSThomas Huth } vrsave;
69fcf5ef2aSThomas Huth } QEMU_PACKED;
70fcf5ef2aSThomas Huth
71356bb70eSMike Nawrocki struct PPCElfVsxregset {
72fcf5ef2aSThomas Huth uint64_t vsr[32];
73fcf5ef2aSThomas Huth } QEMU_PACKED;
74fcf5ef2aSThomas Huth
75356bb70eSMike Nawrocki struct PPCElfSperegset {
76fcf5ef2aSThomas Huth uint32_t evr[32];
77fcf5ef2aSThomas Huth uint64_t spe_acc;
78fcf5ef2aSThomas Huth uint32_t spe_fscr;
79fcf5ef2aSThomas Huth } QEMU_PACKED;
80fcf5ef2aSThomas Huth
81fcf5ef2aSThomas Huth typedef struct noteStruct {
82356bb70eSMike Nawrocki Elf_Nhdr hdr;
83fcf5ef2aSThomas Huth char name[5];
84fcf5ef2aSThomas Huth char pad3[3];
85fcf5ef2aSThomas Huth union {
86356bb70eSMike Nawrocki struct PPCElfPrstatus prstatus;
87356bb70eSMike Nawrocki struct PPCElfFpregset fpregset;
88356bb70eSMike Nawrocki struct PPCElfVmxregset vmxregset;
89356bb70eSMike Nawrocki struct PPCElfVsxregset vsxregset;
90356bb70eSMike Nawrocki struct PPCElfSperegset speregset;
91fcf5ef2aSThomas Huth } contents;
92fcf5ef2aSThomas Huth } QEMU_PACKED Note;
93fcf5ef2aSThomas Huth
94fcf5ef2aSThomas Huth typedef struct NoteFuncArg {
95fcf5ef2aSThomas Huth Note note;
96fcf5ef2aSThomas Huth DumpState *state;
97fcf5ef2aSThomas Huth } NoteFuncArg;
98fcf5ef2aSThomas Huth
ppc_write_elf_prstatus(NoteFuncArg * arg,PowerPCCPU * cpu)99356bb70eSMike Nawrocki static void ppc_write_elf_prstatus(NoteFuncArg *arg, PowerPCCPU *cpu)
100fcf5ef2aSThomas Huth {
101fcf5ef2aSThomas Huth int i;
102356bb70eSMike Nawrocki reg_t cr;
103356bb70eSMike Nawrocki struct PPCElfPrstatus *prstatus;
104356bb70eSMike Nawrocki struct PPCUserRegStruct *reg;
105fcf5ef2aSThomas Huth Note *note = &arg->note;
106fcf5ef2aSThomas Huth DumpState *s = arg->state;
107fcf5ef2aSThomas Huth
108fcf5ef2aSThomas Huth note->hdr.n_type = cpu_to_dump32(s, NT_PRSTATUS);
109fcf5ef2aSThomas Huth
110fcf5ef2aSThomas Huth prstatus = ¬e->contents.prstatus;
111fcf5ef2aSThomas Huth memset(prstatus, 0, sizeof(*prstatus));
112fcf5ef2aSThomas Huth reg = &prstatus->pr_reg;
113fcf5ef2aSThomas Huth
114fcf5ef2aSThomas Huth for (i = 0; i < 32; i++) {
115356bb70eSMike Nawrocki reg->gpr[i] = cpu_to_dump_reg(s, cpu->env.gpr[i]);
116fcf5ef2aSThomas Huth }
117356bb70eSMike Nawrocki reg->nip = cpu_to_dump_reg(s, cpu->env.nip);
118356bb70eSMike Nawrocki reg->msr = cpu_to_dump_reg(s, cpu->env.msr);
119356bb70eSMike Nawrocki reg->ctr = cpu_to_dump_reg(s, cpu->env.ctr);
120356bb70eSMike Nawrocki reg->link = cpu_to_dump_reg(s, cpu->env.lr);
121356bb70eSMike Nawrocki reg->xer = cpu_to_dump_reg(s, cpu_read_xer(&cpu->env));
122fcf5ef2aSThomas Huth
123fcf5ef2aSThomas Huth cr = 0;
124fcf5ef2aSThomas Huth for (i = 0; i < 8; i++) {
125fcf5ef2aSThomas Huth cr |= (cpu->env.crf[i] & 15) << (4 * (7 - i));
126fcf5ef2aSThomas Huth }
127356bb70eSMike Nawrocki reg->ccr = cpu_to_dump_reg(s, cr);
128fcf5ef2aSThomas Huth }
129fcf5ef2aSThomas Huth
ppc_write_elf_fpregset(NoteFuncArg * arg,PowerPCCPU * cpu)130356bb70eSMike Nawrocki static void ppc_write_elf_fpregset(NoteFuncArg *arg, PowerPCCPU *cpu)
131fcf5ef2aSThomas Huth {
132fcf5ef2aSThomas Huth int i;
133356bb70eSMike Nawrocki struct PPCElfFpregset *fpregset;
134fcf5ef2aSThomas Huth Note *note = &arg->note;
135fcf5ef2aSThomas Huth DumpState *s = arg->state;
136fcf5ef2aSThomas Huth
137fcf5ef2aSThomas Huth note->hdr.n_type = cpu_to_dump32(s, NT_PRFPREG);
138fcf5ef2aSThomas Huth
139fcf5ef2aSThomas Huth fpregset = ¬e->contents.fpregset;
140fcf5ef2aSThomas Huth memset(fpregset, 0, sizeof(*fpregset));
141fcf5ef2aSThomas Huth
142fcf5ef2aSThomas Huth for (i = 0; i < 32; i++) {
143ef96e3aeSMark Cave-Ayland uint64_t *fpr = cpu_fpr_ptr(&cpu->env, i);
144ef96e3aeSMark Cave-Ayland fpregset->fpr[i] = cpu_to_dump64(s, *fpr);
145fcf5ef2aSThomas Huth }
146356bb70eSMike Nawrocki fpregset->fpscr = cpu_to_dump_reg(s, cpu->env.fpscr);
147fcf5ef2aSThomas Huth }
148fcf5ef2aSThomas Huth
ppc_write_elf_vmxregset(NoteFuncArg * arg,PowerPCCPU * cpu)149356bb70eSMike Nawrocki static void ppc_write_elf_vmxregset(NoteFuncArg *arg, PowerPCCPU *cpu)
150fcf5ef2aSThomas Huth {
151fcf5ef2aSThomas Huth int i;
152356bb70eSMike Nawrocki struct PPCElfVmxregset *vmxregset;
153fcf5ef2aSThomas Huth Note *note = &arg->note;
154fcf5ef2aSThomas Huth DumpState *s = arg->state;
155fcf5ef2aSThomas Huth
156fcf5ef2aSThomas Huth note->hdr.n_type = cpu_to_dump32(s, NT_PPC_VMX);
157fcf5ef2aSThomas Huth vmxregset = ¬e->contents.vmxregset;
158fcf5ef2aSThomas Huth memset(vmxregset, 0, sizeof(*vmxregset));
159fcf5ef2aSThomas Huth
160fcf5ef2aSThomas Huth for (i = 0; i < 32; i++) {
161fcf5ef2aSThomas Huth bool needs_byteswap;
162ef96e3aeSMark Cave-Ayland ppc_avr_t *avr = cpu_avr_ptr(&cpu->env, i);
163fcf5ef2aSThomas Huth
164e03b5686SMarc-André Lureau #if HOST_BIG_ENDIAN
165fcf5ef2aSThomas Huth needs_byteswap = s->dump_info.d_endian == ELFDATA2LSB;
166fcf5ef2aSThomas Huth #else
167fcf5ef2aSThomas Huth needs_byteswap = s->dump_info.d_endian == ELFDATA2MSB;
168fcf5ef2aSThomas Huth #endif
169fcf5ef2aSThomas Huth
170fcf5ef2aSThomas Huth if (needs_byteswap) {
171ef96e3aeSMark Cave-Ayland vmxregset->avr[i].u64[0] = bswap64(avr->u64[1]);
172ef96e3aeSMark Cave-Ayland vmxregset->avr[i].u64[1] = bswap64(avr->u64[0]);
173fcf5ef2aSThomas Huth } else {
174ef96e3aeSMark Cave-Ayland vmxregset->avr[i].u64[0] = avr->u64[0];
175ef96e3aeSMark Cave-Ayland vmxregset->avr[i].u64[1] = avr->u64[1];
176fcf5ef2aSThomas Huth }
177fcf5ef2aSThomas Huth }
178c19940dbSBruno Larsen (billionai) vmxregset->vscr.u32[3] = cpu_to_dump32(s, ppc_get_vscr(&cpu->env));
179fcf5ef2aSThomas Huth }
180356bb70eSMike Nawrocki
ppc_write_elf_vsxregset(NoteFuncArg * arg,PowerPCCPU * cpu)181356bb70eSMike Nawrocki static void ppc_write_elf_vsxregset(NoteFuncArg *arg, PowerPCCPU *cpu)
182fcf5ef2aSThomas Huth {
183fcf5ef2aSThomas Huth int i;
184356bb70eSMike Nawrocki struct PPCElfVsxregset *vsxregset;
185fcf5ef2aSThomas Huth Note *note = &arg->note;
186fcf5ef2aSThomas Huth DumpState *s = arg->state;
187fcf5ef2aSThomas Huth
188fcf5ef2aSThomas Huth note->hdr.n_type = cpu_to_dump32(s, NT_PPC_VSX);
189fcf5ef2aSThomas Huth vsxregset = ¬e->contents.vsxregset;
190fcf5ef2aSThomas Huth memset(vsxregset, 0, sizeof(*vsxregset));
191fcf5ef2aSThomas Huth
192fcf5ef2aSThomas Huth for (i = 0; i < 32; i++) {
193ef96e3aeSMark Cave-Ayland uint64_t *vsrl = cpu_vsrl_ptr(&cpu->env, i);
194ef96e3aeSMark Cave-Ayland vsxregset->vsr[i] = cpu_to_dump64(s, *vsrl);
195fcf5ef2aSThomas Huth }
196fcf5ef2aSThomas Huth }
197356bb70eSMike Nawrocki
ppc_write_elf_speregset(NoteFuncArg * arg,PowerPCCPU * cpu)198356bb70eSMike Nawrocki static void ppc_write_elf_speregset(NoteFuncArg *arg, PowerPCCPU *cpu)
199fcf5ef2aSThomas Huth {
200356bb70eSMike Nawrocki struct PPCElfSperegset *speregset;
201fcf5ef2aSThomas Huth Note *note = &arg->note;
202fcf5ef2aSThomas Huth DumpState *s = arg->state;
203fcf5ef2aSThomas Huth
204fcf5ef2aSThomas Huth note->hdr.n_type = cpu_to_dump32(s, NT_PPC_SPE);
205fcf5ef2aSThomas Huth speregset = ¬e->contents.speregset;
206fcf5ef2aSThomas Huth memset(speregset, 0, sizeof(*speregset));
207fcf5ef2aSThomas Huth
208fcf5ef2aSThomas Huth speregset->spe_acc = cpu_to_dump64(s, cpu->env.spe_acc);
209fcf5ef2aSThomas Huth speregset->spe_fscr = cpu_to_dump32(s, cpu->env.spe_fscr);
210fcf5ef2aSThomas Huth }
211fcf5ef2aSThomas Huth
212fcf5ef2aSThomas Huth static const struct NoteFuncDescStruct {
213fcf5ef2aSThomas Huth int contents_size;
214fcf5ef2aSThomas Huth void (*note_contents_func)(NoteFuncArg *arg, PowerPCCPU *cpu);
215fcf5ef2aSThomas Huth } note_func[] = {
216f18793b0SStefan Hajnoczi {sizeof_field(Note, contents.prstatus), ppc_write_elf_prstatus},
217f18793b0SStefan Hajnoczi {sizeof_field(Note, contents.fpregset), ppc_write_elf_fpregset},
218f18793b0SStefan Hajnoczi {sizeof_field(Note, contents.vmxregset), ppc_write_elf_vmxregset},
219f18793b0SStefan Hajnoczi {sizeof_field(Note, contents.vsxregset), ppc_write_elf_vsxregset},
220f18793b0SStefan Hajnoczi {sizeof_field(Note, contents.speregset), ppc_write_elf_speregset},
221fcf5ef2aSThomas Huth { 0, NULL}
222fcf5ef2aSThomas Huth };
223fcf5ef2aSThomas Huth
224fcf5ef2aSThomas Huth typedef struct NoteFuncDescStruct NoteFuncDesc;
225fcf5ef2aSThomas Huth
cpu_get_dump_info(ArchDumpInfo * info,const struct GuestPhysBlockList * guest_phys_blocks)226fcf5ef2aSThomas Huth int cpu_get_dump_info(ArchDumpInfo *info,
227fcf5ef2aSThomas Huth const struct GuestPhysBlockList *guest_phys_blocks)
228fcf5ef2aSThomas Huth {
229b1fde1efSLaurent Vivier PowerPCCPU *cpu;
230b1fde1efSLaurent Vivier
231b1fde1efSLaurent Vivier if (first_cpu == NULL) {
232b1fde1efSLaurent Vivier return -1;
233b1fde1efSLaurent Vivier }
234b1fde1efSLaurent Vivier
235b1fde1efSLaurent Vivier cpu = POWERPC_CPU(first_cpu);
236fcf5ef2aSThomas Huth
237356bb70eSMike Nawrocki info->d_machine = PPC_ELF_MACHINE;
238356bb70eSMike Nawrocki info->d_class = ELFCLASS;
239356bb70eSMike Nawrocki
24093c691a0SNarayana Murty N if (ppc_interrupts_little_endian(cpu, !!(cpu->env.msr_mask & MSR_HVB))) {
241fcf5ef2aSThomas Huth info->d_endian = ELFDATA2LSB;
242c11dc15dSGreg Kurz } else {
243c11dc15dSGreg Kurz info->d_endian = ELFDATA2MSB;
244fcf5ef2aSThomas Huth }
245fcf5ef2aSThomas Huth /* 64KB is the max page size for pseries kernel */
246fcf5ef2aSThomas Huth if (strncmp(object_get_typename(qdev_get_machine()),
247fcf5ef2aSThomas Huth "pseries-", 8) == 0) {
248fcf5ef2aSThomas Huth info->page_size = (1U << 16);
249fcf5ef2aSThomas Huth }
250fcf5ef2aSThomas Huth
251fcf5ef2aSThomas Huth return 0;
252fcf5ef2aSThomas Huth }
253fcf5ef2aSThomas Huth
cpu_get_note_size(int class,int machine,int nr_cpus)254fcf5ef2aSThomas Huth ssize_t cpu_get_note_size(int class, int machine, int nr_cpus)
255fcf5ef2aSThomas Huth {
256fcf5ef2aSThomas Huth int name_size = 8; /* "CORE" or "QEMU" rounded */
257fcf5ef2aSThomas Huth size_t elf_note_size = 0;
258fcf5ef2aSThomas Huth int note_head_size;
259fcf5ef2aSThomas Huth const NoteFuncDesc *nf;
260fcf5ef2aSThomas Huth
261356bb70eSMike Nawrocki note_head_size = sizeof(Elf_Nhdr);
262fcf5ef2aSThomas Huth for (nf = note_func; nf->note_contents_func; nf++) {
263fcf5ef2aSThomas Huth elf_note_size = elf_note_size + note_head_size + name_size +
264fcf5ef2aSThomas Huth nf->contents_size;
265fcf5ef2aSThomas Huth }
266fcf5ef2aSThomas Huth
267fcf5ef2aSThomas Huth return (elf_note_size) * nr_cpus;
268fcf5ef2aSThomas Huth }
269fcf5ef2aSThomas Huth
ppc_write_all_elf_notes(const char * note_name,WriteCoreDumpFunction f,PowerPCCPU * cpu,int id,DumpState * s)270356bb70eSMike Nawrocki static int ppc_write_all_elf_notes(const char *note_name,
271fcf5ef2aSThomas Huth WriteCoreDumpFunction f,
272fcf5ef2aSThomas Huth PowerPCCPU *cpu, int id,
2731af0006aSJanosch Frank DumpState *s)
274fcf5ef2aSThomas Huth {
2751af0006aSJanosch Frank NoteFuncArg arg = { .state = s };
276fcf5ef2aSThomas Huth int ret = -1;
277fcf5ef2aSThomas Huth int note_size;
278fcf5ef2aSThomas Huth const NoteFuncDesc *nf;
279fcf5ef2aSThomas Huth
280fcf5ef2aSThomas Huth for (nf = note_func; nf->note_contents_func; nf++) {
2811af0006aSJanosch Frank arg.note.hdr.n_namesz = cpu_to_dump32(s, sizeof(arg.note.name));
2821af0006aSJanosch Frank arg.note.hdr.n_descsz = cpu_to_dump32(s, nf->contents_size);
283fcf5ef2aSThomas Huth strncpy(arg.note.name, note_name, sizeof(arg.note.name));
284fcf5ef2aSThomas Huth
285fcf5ef2aSThomas Huth (*nf->note_contents_func)(&arg, cpu);
286fcf5ef2aSThomas Huth
287fcf5ef2aSThomas Huth note_size =
288fcf5ef2aSThomas Huth sizeof(arg.note) - sizeof(arg.note.contents) + nf->contents_size;
2891af0006aSJanosch Frank ret = f(&arg.note, note_size, s);
290fcf5ef2aSThomas Huth if (ret < 0) {
291fcf5ef2aSThomas Huth return -1;
292fcf5ef2aSThomas Huth }
293fcf5ef2aSThomas Huth }
294fcf5ef2aSThomas Huth return 0;
295fcf5ef2aSThomas Huth }
296fcf5ef2aSThomas Huth
ppc64_cpu_write_elf64_note(WriteCoreDumpFunction f,CPUState * cs,int cpuid,DumpState * s)297fcf5ef2aSThomas Huth int ppc64_cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cs,
2981af0006aSJanosch Frank int cpuid, DumpState *s)
299fcf5ef2aSThomas Huth {
300fcf5ef2aSThomas Huth PowerPCCPU *cpu = POWERPC_CPU(cs);
3011af0006aSJanosch Frank return ppc_write_all_elf_notes("CORE", f, cpu, cpuid, s);
302356bb70eSMike Nawrocki }
303356bb70eSMike Nawrocki
ppc32_cpu_write_elf32_note(WriteCoreDumpFunction f,CPUState * cs,int cpuid,DumpState * s)304356bb70eSMike Nawrocki int ppc32_cpu_write_elf32_note(WriteCoreDumpFunction f, CPUState *cs,
3051af0006aSJanosch Frank int cpuid, DumpState *s)
306356bb70eSMike Nawrocki {
307356bb70eSMike Nawrocki PowerPCCPU *cpu = POWERPC_CPU(cs);
3081af0006aSJanosch Frank return ppc_write_all_elf_notes("CORE", f, cpu, cpuid, s);
309fcf5ef2aSThomas Huth }
310