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loader: Add data swap option to load-elf

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Some CPUs are of an opposite data-endianness to other components in the
system. Sometimes elfs have the data sections layed out with this CPU
data-endianness accounting for when loaded via the CPU, so byte swaps
(relative to other system components) will occur.

The leading example, is ARM's BE32 mode, which is is basically LE with
address manipulation on half-word and byte accesses to access the
hw/byte reversed address. This means that word data is invariant
across LE and BE32. This also means that instructions are still LE.
The expectation is that the elf will be loaded via the CPU in this
endianness scheme, which means the data in the elf is reversed at
compile time.

As QEMU loads via the system memory directly, rather than the CPU, we
need a mechanism to reverse elf data endianness to implement this
possibility.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Crosthwaite <crosthwaite.peter@gmail.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Crosthwaite
2016-03-04 11:30:21 +00:00
committed by Peter Maydell
parent 140b7ce5ff
commit 7ef295ea5b
34 changed files with 81 additions and 46 deletions
Download Patch File Download Diff File Expand all files Collapse all files
hw/alpha/dp264.c
+2 -2
View File
@@ -111,7 +111,7 @@ static void clipper_init(MachineState *machine)
}
size = load_elf(palcode_filename, cpu_alpha_superpage_to_phys,
NULL, &palcode_entry, &palcode_low, &palcode_high,
0, EM_ALPHA, 0);
0, EM_ALPHA, 0, 0);
if (size < 0) {
error_report("could not load palcode '%s'", palcode_filename);
exit(1);
@@ -131,7 +131,7 @@ static void clipper_init(MachineState *machine)
size = load_elf(kernel_filename, cpu_alpha_superpage_to_phys,
NULL, &kernel_entry, &kernel_low, &kernel_high,
0, EM_ALPHA, 0);
0, EM_ALPHA, 0, 0);
if (size < 0) {
error_report("could not load kernel '%s'", kernel_filename);
exit(1);
hw/arm/armv7m.c
+1 -1
View File
@@ -211,7 +211,7 @@ DeviceState *armv7m_init(MemoryRegion *system_memory, int mem_size, int num_irq,
if (kernel_filename) {
image_size = load_elf(kernel_filename, NULL, NULL, &entry, &lowaddr,
NULL, big_endian, EM_ARM, 1);
NULL, big_endian, EM_ARM, 1, 0);
if (image_size < 0) {
image_size = load_image_targphys(kernel_filename, 0, mem_size);
lowaddr = 0;
hw/arm/boot.c
+1 -1
View File
@@ -755,7 +755,7 @@ static void arm_load_kernel_notify(Notifier *notifier, void *data)
/* Assume that raw images are linux kernels, and ELF images are not. */
kernel_size = load_elf(info->kernel_filename, NULL, NULL, &elf_entry,
&elf_low_addr, &elf_high_addr, big_endian,
elf_machine, 1);
elf_machine, 1, 0);
if (kernel_size > 0 && have_dtb(info)) {
/* If there is still some room left at the base of RAM, try and put
* the DTB there like we do for images loaded with -bios or -pflash.
hw/core/loader.c
+6 -3
View File
@@ -412,7 +412,8 @@ 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),
void *translate_opaque, uint64_t *pentry, uint64_t *lowaddr,
uint64_t *highaddr, int big_endian, int elf_machine, int clear_lsb)
uint64_t *highaddr, int big_endian, int elf_machine,
int clear_lsb, int data_swab)
{
int fd, data_order, target_data_order, must_swab, ret = ELF_LOAD_FAILED;
uint8_t e_ident[EI_NIDENT];
@@ -451,10 +452,12 @@ int load_elf(const char *filename, uint64_t (*translate_fn)(void *, uint64_t),
lseek(fd, 0, SEEK_SET);
if (e_ident[EI_CLASS] == ELFCLASS64) {
ret = load_elf64(filename, fd, translate_fn, translate_opaque, must_swab,
pentry, lowaddr, highaddr, elf_machine, clear_lsb);
pentry, lowaddr, highaddr, elf_machine, clear_lsb,
data_swab);
} else {
ret = load_elf32(filename, fd, translate_fn, translate_opaque, must_swab,
pentry, lowaddr, highaddr, elf_machine, clear_lsb);
pentry, lowaddr, highaddr, elf_machine, clear_lsb,
data_swab);
}
fail:
hw/cris/boot.c
+1 -1
View File
@@ -73,7 +73,7 @@ void cris_load_image(CRISCPU *cpu, struct cris_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,
&entry, NULL, &high, 0, EM_CRIS, 0);
&entry, NULL, &high, 0, EM_CRIS, 0, 0);
li->entry = entry;
if (image_size < 0) {
/* Takes a kimage from the axis devboard SDK. */
hw/i386/multiboot.c
+2 -1
View File
@@ -196,7 +196,8 @@ int load_multiboot(FWCfgState *fw_cfg,
}
kernel_size = load_elf(kernel_filename, NULL, NULL, &elf_entry,
&elf_low, &elf_high, 0, I386_ELF_MACHINE, 0);
&elf_low, &elf_high, 0, I386_ELF_MACHINE,
0, 0);
if (kernel_size < 0) {
fprintf(stderr, "Error while loading elf kernel\n");
exit(1);
hw/lm32/lm32_boards.c
+2 -2
View File
@@ -143,7 +143,7 @@ static void lm32_evr_init(MachineState *machine)
int kernel_size;
kernel_size = load_elf(kernel_filename, NULL, NULL, &entry, NULL, NULL,
1, EM_LATTICEMICO32, 0);
1, EM_LATTICEMICO32, 0, 0);
reset_info->bootstrap_pc = entry;
if (kernel_size < 0) {
@@ -245,7 +245,7 @@ static void lm32_uclinux_init(MachineState *machine)
int kernel_size;
kernel_size = load_elf(kernel_filename, NULL, NULL, &entry, NULL, NULL,
1, EM_LATTICEMICO32, 0);
1, EM_LATTICEMICO32, 0, 0);
reset_info->bootstrap_pc = entry;
if (kernel_size < 0) {
hw/lm32/milkymist.c
+1 -1
View File
@@ -177,7 +177,7 @@ milkymist_init(MachineState *machine)
/* Boots a kernel elf binary. */
kernel_size = load_elf(kernel_filename, NULL, NULL, &entry, NULL, NULL,
1, EM_LATTICEMICO32, 0);
1, EM_LATTICEMICO32, 0, 0);
reset_info->bootstrap_pc = entry;
if (kernel_size < 0) {
hw/m68k/an5206.c
+1 -1
View File
@@ -73,7 +73,7 @@ static void an5206_init(MachineState *machine)
}
kernel_size = load_elf(kernel_filename, NULL, NULL, &elf_entry,
NULL, NULL, 1, EM_68K, 0);
NULL, NULL, 1, EM_68K, 0, 0);
entry = elf_entry;
if (kernel_size < 0) {
kernel_size = load_uimage(kernel_filename, &entry, NULL, NULL,
hw/m68k/dummy_m68k.c
+1 -1
View File
@@ -50,7 +50,7 @@ static void dummy_m68k_init(MachineState *machine)
/* Load kernel. */
if (kernel_filename) {
kernel_size = load_elf(kernel_filename, NULL, NULL, &elf_entry,
NULL, NULL, 1, EM_68K, 0);
NULL, NULL, 1, EM_68K, 0, 0);
entry = elf_entry;
if (kernel_size < 0) {
kernel_size = load_uimage(kernel_filename, &entry, NULL, NULL,
hw/m68k/mcf5208.c
+1 -1
View File
@@ -276,7 +276,7 @@ static void mcf5208evb_init(MachineState *machine)
}
kernel_size = load_elf(kernel_filename, NULL, NULL, &elf_entry,
NULL, NULL, 1, EM_68K, 0);
NULL, NULL, 1, EM_68K, 0, 0);
entry = elf_entry;
if (kernel_size < 0) {
kernel_size = load_uimage(kernel_filename, &entry, NULL, NULL,
hw/microblaze/boot.c
+2 -2
View File
@@ -142,12 +142,12 @@ void microblaze_load_kernel(MicroBlazeCPU *cpu, hwaddr ddr_base,
/* Boots a kernel elf binary. */
kernel_size = load_elf(kernel_filename, NULL, NULL,
&entry, &low, &high,
big_endian, EM_MICROBLAZE, 0);
big_endian, EM_MICROBLAZE, 0, 0);
base32 = entry;
if (base32 == 0xc0000000) {
kernel_size = load_elf(kernel_filename, translate_kernel_address,
NULL, &entry, NULL, NULL,
big_endian, EM_MICROBLAZE, 0);
big_endian, EM_MICROBLAZE, 0, 0);
}
/* Always boot into physical ram. */
boot_info.bootstrap_pc = (uint32_t)entry;
hw/mips/mips_fulong2e.c
+1 -1
View File
@@ -117,7 +117,7 @@ static int64_t load_kernel (CPUMIPSState *env)
if (load_elf(loaderparams.kernel_filename, cpu_mips_kseg0_to_phys, NULL,
(uint64_t *)&kernel_entry, (uint64_t *)&kernel_low,
(uint64_t *)&kernel_high, 0, EM_MIPS, 1) < 0) {
(uint64_t *)&kernel_high, 0, EM_MIPS, 1, 0) < 0) {
fprintf(stderr, "qemu: could not load kernel '%s'\n",
loaderparams.kernel_filename);
exit(1);
hw/mips/mips_malta.c
+1 -1
View File
@@ -796,7 +796,7 @@ static int64_t load_kernel (void)
if (load_elf(loaderparams.kernel_filename, cpu_mips_kseg0_to_phys, NULL,
(uint64_t *)&kernel_entry, NULL, (uint64_t *)&kernel_high,
big_endian, EM_MIPS, 1) < 0) {
big_endian, EM_MIPS, 1, 0) < 0) {
fprintf(stderr, "qemu: could not load kernel '%s'\n",
loaderparams.kernel_filename);
exit(1);
hw/mips/mips_mipssim.c
+1 -1
View File
@@ -70,7 +70,7 @@ static int64_t load_kernel(void)
kernel_size = load_elf(loaderparams.kernel_filename, cpu_mips_kseg0_to_phys,
NULL, (uint64_t *)&entry, NULL,
(uint64_t *)&kernel_high, big_endian,
EM_MIPS, 1);
EM_MIPS, 1, 0);
if (kernel_size >= 0) {
if ((entry & ~0x7fffffffULL) == 0x80000000)
entry = (int32_t)entry;
hw/mips/mips_r4k.c
+1 -1
View File
@@ -88,7 +88,7 @@ static int64_t load_kernel(void)
kernel_size = load_elf(loaderparams.kernel_filename, cpu_mips_kseg0_to_phys,
NULL, (uint64_t *)&entry, NULL,
(uint64_t *)&kernel_high, big_endian,
EM_MIPS, 1);
EM_MIPS, 1, 0);
if (kernel_size >= 0) {
if ((entry & ~0x7fffffffULL) == 0x80000000)
entry = (int32_t)entry;
hw/moxie/moxiesim.c
+2 -1
View File
@@ -54,7 +54,8 @@ static void load_kernel(MoxieCPU *cpu, LoaderParams *loader_params)
ram_addr_t initrd_offset;
kernel_size = load_elf(loader_params->kernel_filename, NULL, NULL,
&entry, &kernel_low, &kernel_high, 1, EM_MOXIE, 0);
&entry, &kernel_low, &kernel_high, 1, EM_MOXIE,
0, 0);
if (kernel_size <= 0) {
fprintf(stderr, "qemu: could not load kernel '%s'\n",
hw/openrisc/openrisc_sim.c
+2 -1
View File
@@ -69,7 +69,8 @@ static void cpu_openrisc_load_kernel(ram_addr_t ram_size,
if (kernel_filename && !qtest_enabled()) {
kernel_size = load_elf(kernel_filename, NULL, NULL,
&elf_entry, NULL, NULL, 1, EM_OPENRISC, 1);
&elf_entry, NULL, NULL, 1, EM_OPENRISC,
1, 0);
entry = elf_entry;
if (kernel_size < 0) {
kernel_size = load_uimage(kernel_filename,
hw/pci-host/prep.c
+1 -1
View File
@@ -313,7 +313,7 @@ static void raven_realize(PCIDevice *d, Error **errp)
if (filename) {
if (s->elf_machine != EM_NONE) {
bios_size = load_elf(filename, NULL, NULL, NULL,
NULL, NULL, 1, s->elf_machine, 0);
NULL, NULL, 1, s->elf_machine, 0, 0);
}
if (bios_size < 0) {
bios_size = get_image_size(filename);
hw/ppc/e500.c
+1 -1
View File
@@ -1017,7 +1017,7 @@ void ppce500_init(MachineState *machine, PPCE500Params *params)
filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
bios_size = load_elf(filename, NULL, NULL, &bios_entry, &loadaddr, NULL,
1, PPC_ELF_MACHINE, 0);
1, PPC_ELF_MACHINE, 0, 0);
if (bios_size < 0) {
/*
* Hrm. No ELF image? Try a uImage, maybe someone is giving us an

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