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elf: Add optional function ptr to load_elf() to parse ELF notes

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This patch adds an optional function pointer, 'elf_note_fn', to
load_elf() which causes load_elf() to additionally parse any
ELF program headers of type PT_NOTE and check to see if the ELF
Note is of the type specified by the 'translate_opaque' arg.
If a matching ELF Note is found then the specfied function pointer
is called to process the ELF note.

Passing a NULL function pointer results in ELF Notes being skipped.

The first consumer of this functionality is the PVHboot support
which needs to read the XEN_ELFNOTE_PHYS32_ENTRY ELF Note while
loading the uncompressed kernel binary in order to discover the
boot entry address for the x86/HVM direct boot ABI.

Signed-off-by: Liam Merwick <liam.merwick@oracle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Liam Merwick
2019-02-05 16:50:16 +01:00
committed by Paolo Bonzini
parent d455ebc4f8
commit 4366e1db16
41 changed files with 113 additions and 70 deletions
Download Patch File Download Diff File Expand all files Collapse all files
hw/alpha/dp264.c
+2 -2
View File
@@ -114,7 +114,7 @@ static void clipper_init(MachineState *machine)
error_report("no palcode provided");
exit(1);
}
size = load_elf(palcode_filename, cpu_alpha_superpage_to_phys,
size = load_elf(palcode_filename, NULL, cpu_alpha_superpage_to_phys,
NULL, &palcode_entry, &palcode_low, &palcode_high,
0, EM_ALPHA, 0, 0);
if (size < 0) {
@@ -133,7 +133,7 @@ static void clipper_init(MachineState *machine)
if (kernel_filename) {
uint64_t param_offset;
size = load_elf(kernel_filename, cpu_alpha_superpage_to_phys,
size = load_elf(kernel_filename, NULL, cpu_alpha_superpage_to_phys,
NULL, &kernel_entry, &kernel_low, &kernel_high,
0, EM_ALPHA, 0, 0);
if (size < 0) {
hw/arm/armv7m.c
+2 -1
View File
@@ -310,7 +310,8 @@ void armv7m_load_kernel(ARMCPU *cpu, const char *kernel_filename, int mem_size)
as = cpu_get_address_space(cs, asidx);
if (kernel_filename) {
image_size = load_elf_as(kernel_filename, NULL, NULL, &entry, &lowaddr,
image_size = load_elf_as(kernel_filename, NULL, NULL, NULL,
&entry, &lowaddr,
NULL, big_endian, EM_ARM, 1, 0, as);
if (image_size < 0) {
image_size = load_image_targphys_as(kernel_filename, 0,
hw/arm/boot.c
+1 -1
View File
@@ -881,7 +881,7 @@ static int64_t arm_load_elf(struct arm_boot_info *info, uint64_t *pentry,
}
}
ret = load_elf_as(info->kernel_filename, NULL, NULL,
ret = load_elf_as(info->kernel_filename, NULL, NULL, NULL,
pentry, lowaddr, highaddr, big_endian, elf_machine,
1, data_swab, as);
if (ret <= 0) {
hw/core/generic-loader.c
+1 -1
View File
@@ -136,7 +136,7 @@ static void generic_loader_realize(DeviceState *dev, Error **errp)
AddressSpace *as = s->cpu ? s->cpu->as : NULL;
if (!s->force_raw) {
size = load_elf_as(s->file, NULL, NULL, &entry, NULL, NULL,
size = load_elf_as(s->file, NULL, NULL, NULL, &entry, NULL, NULL,
big_endian, 0, 0, 0, as);
if (size < 0) {
hw/core/loader.c
+16 -8
View File
@@ -396,37 +396,42 @@ fail:
}
/* return < 0 if error, otherwise the number of bytes loaded in memory */
int load_elf(const char *filename, uint64_t (*translate_fn)(void *, uint64_t),
int load_elf(const char *filename,
uint64_t (*elf_note_fn)(void *, void *, bool),
uint64_t (*translate_fn)(void *, uint64_t),
void *translate_opaque, uint64_t *pentry, uint64_t *lowaddr,
uint64_t *highaddr, int big_endian, int elf_machine,
int clear_lsb, int data_swab)
{
return load_elf_as(filename, translate_fn, translate_opaque, pentry,
lowaddr, highaddr, big_endian, elf_machine, clear_lsb,
data_swab, NULL);
return load_elf_as(filename, elf_note_fn, translate_fn, translate_opaque,
pentry, lowaddr, highaddr, big_endian, elf_machine,
clear_lsb, data_swab, NULL);
}
/* return < 0 if error, otherwise the number of bytes loaded in memory */
int load_elf_as(const char *filename,
uint64_t (*elf_note_fn)(void *, void *, bool),
uint64_t (*translate_fn)(void *, uint64_t),
void *translate_opaque, uint64_t *pentry, uint64_t *lowaddr,
uint64_t *highaddr, int big_endian, int elf_machine,
int clear_lsb, int data_swab, AddressSpace *as)
{
return load_elf_ram(filename, translate_fn, translate_opaque,
return load_elf_ram(filename, elf_note_fn, translate_fn, translate_opaque,
pentry, lowaddr, highaddr, big_endian, elf_machine,
clear_lsb, data_swab, as, true);
}
/* return < 0 if error, otherwise the number of bytes loaded in memory */
int load_elf_ram(const char *filename,
uint64_t (*elf_note_fn)(void *, void *, bool),
uint64_t (*translate_fn)(void *, uint64_t),
void *translate_opaque, uint64_t *pentry, uint64_t *lowaddr,
uint64_t *highaddr, int big_endian, int elf_machine,
int clear_lsb, int data_swab, AddressSpace *as,
bool load_rom)
{
return load_elf_ram_sym(filename, translate_fn, translate_opaque,
return load_elf_ram_sym(filename, elf_note_fn,
translate_fn, translate_opaque,
pentry, lowaddr, highaddr, big_endian,
elf_machine, clear_lsb, data_swab, as,
load_rom, NULL);
@@ -434,6 +439,7 @@ int load_elf_ram(const char *filename,
/* return < 0 if error, otherwise the number of bytes loaded in memory */
int load_elf_ram_sym(const char *filename,
uint64_t (*elf_note_fn)(void *, void *, bool),
uint64_t (*translate_fn)(void *, uint64_t),
void *translate_opaque, uint64_t *pentry,
uint64_t *lowaddr, uint64_t *highaddr, int big_endian,
@@ -476,11 +482,13 @@ int load_elf_ram_sym(const char *filename,
lseek(fd, 0, SEEK_SET);
if (e_ident[EI_CLASS] == ELFCLASS64) {
ret = load_elf64(filename, fd, translate_fn, translate_opaque, must_swab,
ret = load_elf64(filename, fd, elf_note_fn,
translate_fn, translate_opaque, must_swab,
pentry, lowaddr, highaddr, elf_machine, clear_lsb,
data_swab, as, load_rom, sym_cb);
} else {
ret = load_elf32(filename, fd, translate_fn, translate_opaque, must_swab,
ret = load_elf32(filename, fd, elf_note_fn,
translate_fn, translate_opaque, must_swab,
pentry, lowaddr, highaddr, elf_machine, clear_lsb,
data_swab, as, load_rom, sym_cb);
}
hw/cris/boot.c
+2 -1
View File
@@ -75,7 +75,8 @@ void cris_load_image(CRISCPU *cpu, struct cris_load_info *li)
env->load_info = li;
/* Boots a kernel elf binary, os/linux-2.6/vmlinux from the axis
devboard SDK. */
image_size = load_elf(li->image_filename, translate_kernel_address, NULL,
image_size = load_elf(li->image_filename, NULL,
translate_kernel_address, NULL,
&entry, NULL, &high, 0, EM_CRIS, 0, 0);
li->entry = entry;
if (image_size < 0) {
hw/hppa/machine.c
+3 -3
View File
@@ -135,8 +135,8 @@ static void machine_hppa_init(MachineState *machine)
exit(1);
}
size = load_elf(firmware_filename, NULL,
NULL, &firmware_entry, &firmware_low, &firmware_high,
size = load_elf(firmware_filename, NULL, NULL, NULL,
&firmware_entry, &firmware_low, &firmware_high,
true, EM_PARISC, 0, 0);
/* Unfortunately, load_elf sign-extends reading elf32. */
@@ -165,7 +165,7 @@ static void machine_hppa_init(MachineState *machine)
/* Load kernel */
if (kernel_filename) {
size = load_elf(kernel_filename, &cpu_hppa_to_phys,
size = load_elf(kernel_filename, NULL, &cpu_hppa_to_phys,
NULL, &kernel_entry, &kernel_low, &kernel_high,
true, EM_PARISC, 0, 0);
hw/i386/multiboot.c
+1 -1
View File
@@ -199,7 +199,7 @@ int load_multiboot(FWCfgState *fw_cfg,
exit(1);
}
kernel_size = load_elf(kernel_filename, NULL, NULL, &elf_entry,
kernel_size = load_elf(kernel_filename, NULL, NULL, NULL, &elf_entry,
&elf_low, &elf_high, 0, I386_ELF_MACHINE,
0, 0);
if (kernel_size < 0) {
hw/lm32/lm32_boards.c
+4 -2
View File
@@ -138,7 +138,8 @@ static void lm32_evr_init(MachineState *machine)
uint64_t entry;
int kernel_size;
kernel_size = load_elf(kernel_filename, NULL, NULL, &entry, NULL, NULL,
kernel_size = load_elf(kernel_filename, NULL, NULL, NULL,
&entry, NULL, NULL,
1, EM_LATTICEMICO32, 0, 0);
reset_info->bootstrap_pc = entry;
@@ -231,7 +232,8 @@ static void lm32_uclinux_init(MachineState *machine)
uint64_t entry;
int kernel_size;
kernel_size = load_elf(kernel_filename, NULL, NULL, &entry, NULL, NULL,
kernel_size = load_elf(kernel_filename, NULL, NULL, NULL,
&entry, NULL, NULL,
1, EM_LATTICEMICO32, 0, 0);
reset_info->bootstrap_pc = entry;
hw/lm32/milkymist.c
+2 -1
View File
@@ -176,7 +176,8 @@ milkymist_init(MachineState *machine)
uint64_t entry;
/* Boots a kernel elf binary. */
kernel_size = load_elf(kernel_filename, NULL, NULL, &entry, NULL, NULL,
kernel_size = load_elf(kernel_filename, NULL, NULL, NULL,
&entry, NULL, NULL,
1, EM_LATTICEMICO32, 0, 0);
reset_info->bootstrap_pc = entry;
hw/m68k/an5206.c
+1 -1
View File
@@ -66,7 +66,7 @@ static void an5206_init(MachineState *machine)
exit(1);
}
kernel_size = load_elf(kernel_filename, NULL, NULL, &elf_entry,
kernel_size = load_elf(kernel_filename, NULL, NULL, NULL, &elf_entry,
NULL, NULL, 1, EM_68K, 0, 0);
entry = elf_entry;
if (kernel_size < 0) {
hw/m68k/mcf5208.c
+1 -1
View File
@@ -294,7 +294,7 @@ static void mcf5208evb_init(MachineState *machine)
exit(1);
}
kernel_size = load_elf(kernel_filename, NULL, NULL, &elf_entry,
kernel_size = load_elf(kernel_filename, NULL, NULL, NULL, &elf_entry,
NULL, NULL, 1, EM_68K, 0, 0);
entry = elf_entry;
if (kernel_size < 0) {
hw/microblaze/boot.c
+4 -3
View File
@@ -142,13 +142,14 @@ void microblaze_load_kernel(MicroBlazeCPU *cpu, hwaddr ddr_base,
#endif
/* Boots a kernel elf binary. */
kernel_size = load_elf(kernel_filename, NULL, NULL,
kernel_size = load_elf(kernel_filename, NULL, NULL, NULL,
&entry, &low, &high,
big_endian, EM_MICROBLAZE, 0, 0);
base32 = entry;
if (base32 == 0xc0000000) {
kernel_size = load_elf(kernel_filename, translate_kernel_address,
NULL, &entry, NULL, NULL,
kernel_size = load_elf(kernel_filename, NULL,
translate_kernel_address, NULL,
&entry, NULL, NULL,
big_endian, EM_MICROBLAZE, 0, 0);
}
/* Always boot into physical ram. */
hw/mips/mips_fulong2e.c
+3 -2
View File
@@ -111,8 +111,9 @@ static int64_t load_kernel (CPUMIPSState *env)
uint32_t *prom_buf;
long prom_size;
kernel_size = load_elf(loaderparams.kernel_filename, cpu_mips_kseg0_to_phys,
NULL, (uint64_t *)&kernel_entry,
kernel_size = load_elf(loaderparams.kernel_filename, NULL,
cpu_mips_kseg0_to_phys, NULL,
(uint64_t *)&kernel_entry,
(uint64_t *)&kernel_low, (uint64_t *)&kernel_high,
0, EM_MIPS, 1, 0);
if (kernel_size < 0) {
hw/mips/mips_malta.c
+3 -2
View File
@@ -1010,8 +1010,9 @@ static int64_t load_kernel (void)
big_endian = 0;
#endif
kernel_size = load_elf(loaderparams.kernel_filename, cpu_mips_kseg0_to_phys,
NULL, (uint64_t *)&kernel_entry, NULL,
kernel_size = load_elf(loaderparams.kernel_filename, NULL,
cpu_mips_kseg0_to_phys, NULL,
(uint64_t *)&kernel_entry, NULL,
(uint64_t *)&kernel_high, big_endian, EM_MIPS, 1, 0);
if (kernel_size < 0) {
error_report("could not load kernel '%s': %s",
hw/mips/mips_mipssim.c
+3 -2
View File
@@ -69,8 +69,9 @@ static int64_t load_kernel(void)
big_endian = 0;
#endif
kernel_size = load_elf(loaderparams.kernel_filename, cpu_mips_kseg0_to_phys,
NULL, (uint64_t *)&entry, NULL,
kernel_size = load_elf(loaderparams.kernel_filename, NULL,
cpu_mips_kseg0_to_phys, NULL,
(uint64_t *)&entry, NULL,
(uint64_t *)&kernel_high, big_endian,
EM_MIPS, 1, 0);
if (kernel_size >= 0) {
hw/mips/mips_r4k.c
+3 -2
View File
@@ -92,8 +92,9 @@ static int64_t load_kernel(void)
#else
big_endian = 0;
#endif
kernel_size = load_elf(loaderparams.kernel_filename, cpu_mips_kseg0_to_phys,
NULL, (uint64_t *)&entry, NULL,
kernel_size = load_elf(loaderparams.kernel_filename, NULL,
cpu_mips_kseg0_to_phys, NULL,
(uint64_t *)&entry, NULL,
(uint64_t *)&kernel_high, big_endian,
EM_MIPS, 1, 0);
if (kernel_size >= 0) {
hw/moxie/moxiesim.c
+1 -1
View File
@@ -57,7 +57,7 @@ static void load_kernel(MoxieCPU *cpu, LoaderParams *loader_params)
long kernel_size;
ram_addr_t initrd_offset;
kernel_size = load_elf(loader_params->kernel_filename, NULL, NULL,
kernel_size = load_elf(loader_params->kernel_filename, NULL, NULL, NULL,
&entry, &kernel_low, &kernel_high, 1, EM_MOXIE,
0, 0);
hw/nios2/boot.c
+4 -3
View File
@@ -146,13 +146,14 @@ void nios2_load_kernel(Nios2CPU *cpu, hwaddr ddr_base,
#endif
/* Boots a kernel elf binary. */
kernel_size = load_elf(kernel_filename, NULL, NULL,
kernel_size = load_elf(kernel_filename, NULL, NULL, NULL,
&entry, &low, &high,
big_endian, EM_ALTERA_NIOS2, 0, 0);
base32 = entry;
if (base32 == 0xc0000000) {
kernel_size = load_elf(kernel_filename, translate_kernel_address,
NULL, &entry, NULL, NULL,
kernel_size = load_elf(kernel_filename, NULL,
translate_kernel_address, NULL,
&entry, NULL, NULL,
big_endian, EM_ALTERA_NIOS2, 0, 0);
}
hw/openrisc/openrisc_sim.c
+1 -1
View File
@@ -96,7 +96,7 @@ static void openrisc_load_kernel(ram_addr_t ram_size,
hwaddr entry;
if (kernel_filename && !qtest_enabled()) {
kernel_size = load_elf(kernel_filename, NULL, NULL,
kernel_size = load_elf(kernel_filename, NULL, NULL, NULL,
&elf_entry, NULL, NULL, 1, EM_OPENRISC,
1, 0);
entry = elf_entry;

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