| Message ID | 200341833.8193594.1554193736818.JavaMail.zimbra@kalray.eu (mailing list archive) |
|---|---|
| State | RFC |
| Headers | show |
| Series | [RFC] rproc: Add elf64 support in elf loader | expand |
Ping ? ----- Original Message ----- From: "Clément Leger" <cleger@kalray.eu> To: "linux-remoteproc" <linux-remoteproc@vger.kernel.org>, "Ohad Ben-Cohen" <ohad@wizery.com>, "Bjorn Andersson" <bjorn.andersson@linaro.org> Cc: "Loic PALLARDY" <loic.pallardy@st.com> Sent: Tuesday, 2 April, 2019 10:28:56 Subject: [RFC PATCH] rproc: Add elf64 support in elf loader elf32 and elf64 mainly differ by their types. In order to avoid copy/pasting the whole loader code, generate static inline functions which will access values according to the elf class. It allows to keep a common loader basis. In order to accomodate both elf types sizes, the maximum size for a elf header member is chosen using the maximum value of both elf class. Signed-off-by: Clement Leger <clement.leger@kalray.eu> --- drivers/remoteproc/remoteproc_elf_loader.c | 130 +++++++++++++++++------------ drivers/remoteproc/remoteproc_elf_loader.h | 78 +++++++++++++++++ drivers/remoteproc/remoteproc_internal.h | 2 +- include/linux/remoteproc.h | 4 +- 4 files changed, 159 insertions(+), 55 deletions(-) create mode 100644 drivers/remoteproc/remoteproc_elf_loader.h diff --git a/drivers/remoteproc/remoteproc_elf_loader.c b/drivers/remoteproc/remoteproc_elf_loader.c index b17d72ec8603..f6aefa46e45c 100644 --- a/drivers/remoteproc/remoteproc_elf_loader.c +++ b/drivers/remoteproc/remoteproc_elf_loader.c @@ -31,6 +31,7 @@ #include <linux/elf.h> #include "remoteproc_internal.h" +#include "remoteproc_elf_loader.h" /** * rproc_elf_sanity_check() - Sanity Check ELF firmware image @@ -44,7 +45,10 @@ int rproc_elf_sanity_check(struct rproc *rproc, const struct firmware *fw) const char *name = rproc->firmware; struct device *dev = &rproc->dev; struct elf32_hdr *ehdr; + u32 elf_shdr_size; + u64 phoff, shoff; char class; + u16 phnum; if (!fw) { dev_err(dev, "failed to load %s\n", name); @@ -58,9 +62,13 @@ int rproc_elf_sanity_check(struct rproc *rproc, const struct firmware *fw) ehdr = (struct elf32_hdr *)fw->data; - /* We only support ELF32 at this point */ + if (memcmp(ehdr->e_ident, ELFMAG, SELFMAG)) { + dev_err(dev, "Image is corrupted (bad magic)\n"); + return -EINVAL; + } + class = ehdr->e_ident[EI_CLASS]; - if (class != ELFCLASS32) { + if (class != ELFCLASS32 && class != ELFCLASS64) { dev_err(dev, "Unsupported class: %d\n", class); return -EINVAL; } @@ -75,26 +83,29 @@ int rproc_elf_sanity_check(struct rproc *rproc, const struct firmware *fw) return -EINVAL; } - if (fw->size < ehdr->e_shoff + sizeof(struct elf32_shdr)) { - dev_err(dev, "Image is too small\n"); - return -EINVAL; - } + phoff = elf_hdr_e_phoff(class, fw->data); + shoff = elf_hdr_e_shoff(class, fw->data); + phnum = elf_hdr_e_phnum(class, fw->data); + elf_shdr_size = elf_size_of_shdr(class); - if (memcmp(ehdr->e_ident, ELFMAG, SELFMAG)) { - dev_err(dev, "Image is corrupted (bad magic)\n"); + if (fw->size < shoff + elf_shdr_size) { + dev_err(dev, "Image is too small\n"); return -EINVAL; } - if (ehdr->e_phnum == 0) { + if (phnum == 0) { dev_err(dev, "No loadable segments\n"); return -EINVAL; } - if (ehdr->e_phoff > fw->size) { + if (phoff > fw->size) { dev_err(dev, "Firmware size is too small\n"); return -EINVAL; } + dev_dbg(dev, "Firmware is an elf%d file\n", + class == ELFCLASS32 ? 32 : 64); + return 0; } EXPORT_SYMBOL(rproc_elf_sanity_check); @@ -110,11 +121,9 @@ EXPORT_SYMBOL(rproc_elf_sanity_check); * Note that the boot address is not a configurable property of all remote * processors. Some will always boot at a specific hard-coded address. */ -u32 rproc_elf_get_boot_addr(struct rproc *rproc, const struct firmware *fw) +u64 rproc_elf_get_boot_addr(struct rproc *rproc, const struct firmware *fw) { - struct elf32_hdr *ehdr = (struct elf32_hdr *)fw->data; - - return ehdr->e_entry; + return elf_hdr_e_entry(fw_elf_get_class(fw), fw->data); } EXPORT_SYMBOL(rproc_elf_get_boot_addr); @@ -145,37 +154,41 @@ EXPORT_SYMBOL(rproc_elf_get_boot_addr); int rproc_elf_load_segments(struct rproc *rproc, const struct firmware *fw) { struct device *dev = &rproc->dev; - struct elf32_hdr *ehdr; - struct elf32_phdr *phdr; + const void *ehdr, *phdr; int i, ret = 0; + u16 phnum; const u8 *elf_data = fw->data; + u8 class = fw_elf_get_class(fw); + u32 elf_phdr_size = elf_size_of_phdr(class); - ehdr = (struct elf32_hdr *)elf_data; - phdr = (struct elf32_phdr *)(elf_data + ehdr->e_phoff); + ehdr = elf_data; + phnum = elf_hdr_e_phnum(class, ehdr); + phdr = elf_data + elf_hdr_e_phoff(class, ehdr); /* go through the available ELF segments */ - for (i = 0; i < ehdr->e_phnum; i++, phdr++) { - u32 da = phdr->p_paddr; - u32 memsz = phdr->p_memsz; - u32 filesz = phdr->p_filesz; - u32 offset = phdr->p_offset; + for (i = 0; i < phnum; i++, phdr += elf_phdr_size) { + u64 da = elf_phdr_p_paddr(class, phdr); + u64 memsz = elf_phdr_p_memsz(class, phdr); + u64 filesz = elf_phdr_p_filesz(class, phdr); + u64 offset = elf_phdr_p_offset(class, phdr); + u32 type = elf_phdr_p_type(class, phdr); void *ptr; - if (phdr->p_type != PT_LOAD) + if (type != PT_LOAD) continue; - dev_dbg(dev, "phdr: type %d da 0x%x memsz 0x%x filesz 0x%x\n", - phdr->p_type, da, memsz, filesz); + dev_dbg(dev, "phdr: type %d da 0x%llx memsz 0x%llx filesz 0x%llx\n", + type, da, memsz, filesz); if (filesz > memsz) { - dev_err(dev, "bad phdr filesz 0x%x memsz 0x%x\n", + dev_err(dev, "bad phdr filesz 0x%llx memsz 0x%llx\n", filesz, memsz); ret = -EINVAL; break; } if (offset + filesz > fw->size) { - dev_err(dev, "truncated fw: need 0x%x avail 0x%zx\n", + dev_err(dev, "truncated fw: need 0x%llx avail 0x%zx\n", offset + filesz, fw->size); ret = -EINVAL; break; @@ -184,14 +197,15 @@ int rproc_elf_load_segments(struct rproc *rproc, const struct firmware *fw) /* grab the kernel address for this device address */ ptr = rproc_da_to_va(rproc, da, memsz); if (!ptr) { - dev_err(dev, "bad phdr da 0x%x mem 0x%x\n", da, memsz); + dev_err(dev, "bad phdr da 0x%llx mem 0x%llx\n", da, + memsz); ret = -EINVAL; break; } /* put the segment where the remote processor expects it */ - if (phdr->p_filesz) - memcpy(ptr, elf_data + phdr->p_offset, filesz); + if (filesz) + memcpy(ptr, elf_data + offset, filesz); /* * Zero out remaining memory for this segment. @@ -208,24 +222,32 @@ int rproc_elf_load_segments(struct rproc *rproc, const struct firmware *fw) } EXPORT_SYMBOL(rproc_elf_load_segments); -static struct elf32_shdr * -find_table(struct device *dev, struct elf32_hdr *ehdr, size_t fw_size) +static const void * +find_table(struct device *dev, const struct firmware *fw) { - struct elf32_shdr *shdr; + const void *shdr, *name_table_shdr; int i; const char *name_table; struct resource_table *table = NULL; - const u8 *elf_data = (void *)ehdr; + const u8 *elf_data = (void *)fw->data; + u8 class = fw_elf_get_class(fw); + size_t fw_size = fw->size; + const void *ehdr = elf_data; + u16 shnum = elf_hdr_e_shnum(class, ehdr); + u32 elf_shdr_size = elf_size_of_shdr(class); + u16 shstrndx = elf_hdr_e_shstrndx(class, ehdr); /* look for the resource table and handle it */ - shdr = (struct elf32_shdr *)(elf_data + ehdr->e_shoff); - name_table = elf_data + shdr[ehdr->e_shstrndx].sh_offset; + shdr = elf_data + elf_hdr_e_shoff(class, ehdr); + name_table_shdr = shdr + (shstrndx * elf_shdr_size); + name_table = elf_data + elf_shdr_sh_offset(class, name_table_shdr); - for (i = 0; i < ehdr->e_shnum; i++, shdr++) { - u32 size = shdr->sh_size; - u32 offset = shdr->sh_offset; + for (i = 0; i < shnum; i++, shdr += elf_shdr_size) { + u64 size = elf_shdr_sh_size(class, shdr); + u64 offset = elf_shdr_sh_offset(class, shdr); + u32 name = elf_shdr_sh_name(class, shdr); - if (strcmp(name_table + shdr->sh_name, ".resource_table")) + if (strcmp(name_table + name, ".resource_table")) continue; table = (struct resource_table *)(elf_data + offset); @@ -279,21 +301,21 @@ find_table(struct device *dev, struct elf32_hdr *ehdr, size_t fw_size) */ int rproc_elf_load_rsc_table(struct rproc *rproc, const struct firmware *fw) { - struct elf32_hdr *ehdr; - struct elf32_shdr *shdr; + const void *shdr; struct device *dev = &rproc->dev; struct resource_table *table = NULL; const u8 *elf_data = fw->data; size_t tablesz; + u8 class = fw_elf_get_class(fw); + u64 sh_offset; - ehdr = (struct elf32_hdr *)elf_data; - - shdr = find_table(dev, ehdr, fw->size); + shdr = find_table(dev, fw); if (!shdr) return -EINVAL; - table = (struct resource_table *)(elf_data + shdr->sh_offset); - tablesz = shdr->sh_size; + sh_offset = elf_shdr_sh_offset(class, shdr); + table = (struct resource_table *)(elf_data + sh_offset); + tablesz = elf_shdr_sh_size(class, shdr); /* * Create a copy of the resource table. When a virtio device starts @@ -326,13 +348,17 @@ EXPORT_SYMBOL(rproc_elf_load_rsc_table); struct resource_table *rproc_elf_find_loaded_rsc_table(struct rproc *rproc, const struct firmware *fw) { - struct elf32_hdr *ehdr = (struct elf32_hdr *)fw->data; - struct elf32_shdr *shdr; + const void *shdr; + u64 sh_addr, sh_size; + u8 class = fw_elf_get_class(fw); - shdr = find_table(&rproc->dev, ehdr, fw->size); + shdr = find_table(&rproc->dev, fw); if (!shdr) return NULL; - return rproc_da_to_va(rproc, shdr->sh_addr, shdr->sh_size); + sh_addr = elf_shdr_sh_addr(class, shdr); + sh_size = elf_shdr_sh_size(class, shdr); + + return rproc_da_to_va(rproc, sh_addr, sh_size); } EXPORT_SYMBOL(rproc_elf_find_loaded_rsc_table); diff --git a/drivers/remoteproc/remoteproc_elf_loader.h b/drivers/remoteproc/remoteproc_elf_loader.h new file mode 100644 index 000000000000..e37a55c61eae --- /dev/null +++ b/drivers/remoteproc/remoteproc_elf_loader.h @@ -0,0 +1,78 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Remote processor elf loader defines + * + * Copyright (C) 2019 Kalray, Inc. + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef REMOTEPROC_ELF_LOADER_H +#define REMOTEPROC_ELF_LOADER_H + +#include <linux/elf.h> +#include <linux/types.h> + +/** + * fw_elf_get_class - Get elf class + * @fw: the ELF firmware image + * + * Note that we use and elf32_hdr to access the class since the start of the + * struct is the same for both elf class + * + * Return: elf class of the firmware + */ +static inline u8 fw_elf_get_class(const struct firmware *fw) +{ + struct elf32_hdr *ehdr = (struct elf32_hdr *)fw->data; + + return ehdr->e_ident[EI_CLASS]; +} + +#define ELF_GET_FIELD(__s, __field, __type) \ +static inline __type elf_##__s##_##__field(u8 class, const void *arg) \ +{ \ + if (class == ELFCLASS32) \ + return (__type) ((const struct elf32_##__s *) arg)->__field; \ + else \ + return (__type) ((const struct elf64_##__s *) arg)->__field; \ +} + +ELF_GET_FIELD(hdr, e_entry, u64) +ELF_GET_FIELD(hdr, e_phnum, u16) +ELF_GET_FIELD(hdr, e_shnum, u16) +ELF_GET_FIELD(hdr, e_phoff, u64) +ELF_GET_FIELD(hdr, e_shoff, u64) +ELF_GET_FIELD(hdr, e_shstrndx, u16) + +ELF_GET_FIELD(phdr, p_paddr, u64) +ELF_GET_FIELD(phdr, p_filesz, u64) +ELF_GET_FIELD(phdr, p_memsz, u64) +ELF_GET_FIELD(phdr, p_type, u32) +ELF_GET_FIELD(phdr, p_offset, u64) + +ELF_GET_FIELD(shdr, sh_size, u64) +ELF_GET_FIELD(shdr, sh_offset, u64) +ELF_GET_FIELD(shdr, sh_name, u32) +ELF_GET_FIELD(shdr, sh_addr, u64) + +#define ELF_STRUCT_SIZE(__s) \ +static inline unsigned long elf_size_of_##__s(u8 class) \ +{ \ + if (class == ELFCLASS32)\ + return sizeof(struct elf32_##__s); \ + else \ + return sizeof(struct elf64_##__s); \ +} + +ELF_STRUCT_SIZE(shdr) +ELF_STRUCT_SIZE(phdr) + +#endif /* REMOTEPROC_ELF_LOADER_H */ diff --git a/drivers/remoteproc/remoteproc_internal.h b/drivers/remoteproc/remoteproc_internal.h index b02b15f74a5e..6d4a5ffcb28b 100644 --- a/drivers/remoteproc/remoteproc_internal.h +++ b/drivers/remoteproc/remoteproc_internal.h @@ -55,7 +55,7 @@ void *rproc_da_to_va(struct rproc *rproc, u64 da, int len); int rproc_trigger_recovery(struct rproc *rproc); int rproc_elf_sanity_check(struct rproc *rproc, const struct firmware *fw); -u32 rproc_elf_get_boot_addr(struct rproc *rproc, const struct firmware *fw); +u64 rproc_elf_get_boot_addr(struct rproc *rproc, const struct firmware *fw); int rproc_elf_load_segments(struct rproc *rproc, const struct firmware *fw); int rproc_elf_load_rsc_table(struct rproc *rproc, const struct firmware *fw); struct resource_table *rproc_elf_find_loaded_rsc_table(struct rproc *rproc, diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h index a3edd981220e..9a7c4c3f1c92 100644 --- a/include/linux/remoteproc.h +++ b/include/linux/remoteproc.h @@ -381,7 +381,7 @@ struct rproc_ops { struct rproc *rproc, const struct firmware *fw); int (*load)(struct rproc *rproc, const struct firmware *fw); int (*sanity_check)(struct rproc *rproc, const struct firmware *fw); - u32 (*get_boot_addr)(struct rproc *rproc, const struct firmware *fw); + u64 (*get_boot_addr)(struct rproc *rproc, const struct firmware *fw); }; /** @@ -497,7 +497,7 @@ struct rproc { int num_traces; struct list_head carveouts; struct list_head mappings; - u32 bootaddr; + u64 bootaddr; struct list_head rvdevs; struct list_head subdevs; struct idr notifyids;
Hi Clément, I tested your patch on stm32MP1, no regression observed when loading my ELF32 firmware. Now i'm not enough expert on the loader to ack your patch. For stm32 MP1 platform: Tested-by: Arnaud POULIQUEN <arnaud.pouliquen@st.com> Please find few remarks in your code Regards Arnaud On 5/7/19 2:09 PM, Clément Leger wrote: > Ping ? > > ----- Original Message ----- > From: "Clément Leger" <cleger@kalray.eu> > To: "linux-remoteproc" <linux-remoteproc@vger.kernel.org>, "Ohad Ben-Cohen" <ohad@wizery.com>, "Bjorn Andersson" <bjorn.andersson@linaro.org> > Cc: "Loic PALLARDY" <loic.pallardy@st.com> > Sent: Tuesday, 2 April, 2019 10:28:56 > Subject: [RFC PATCH] rproc: Add elf64 support in elf loader > > elf32 and elf64 mainly differ by their types. In order to avoid > copy/pasting the whole loader code, generate static inline functions > which will access values according to the elf class. It allows to keep a > common loader basis. > In order to accomodate both elf types sizes, the maximum size for a > elf header member is chosen using the maximum value of both elf class. > > Signed-off-by: Clement Leger <clement.leger@kalray.eu> > --- > drivers/remoteproc/remoteproc_elf_loader.c | 130 +++++++++++++++++------------ > drivers/remoteproc/remoteproc_elf_loader.h | 78 +++++++++++++++++ > drivers/remoteproc/remoteproc_internal.h | 2 +- > include/linux/remoteproc.h | 4 +- > 4 files changed, 159 insertions(+), 55 deletions(-) > create mode 100644 drivers/remoteproc/remoteproc_elf_loader.h > > diff --git a/drivers/remoteproc/remoteproc_elf_loader.c b/drivers/remoteproc/remoteproc_elf_loader.c > index b17d72ec8603..f6aefa46e45c 100644 > --- a/drivers/remoteproc/remoteproc_elf_loader.c > +++ b/drivers/remoteproc/remoteproc_elf_loader.c > @@ -31,6 +31,7 @@ > #include <linux/elf.h> > > #include "remoteproc_internal.h" > +#include "remoteproc_elf_loader.h" > > /** > * rproc_elf_sanity_check() - Sanity Check ELF firmware image > @@ -44,7 +45,10 @@ int rproc_elf_sanity_check(struct rproc *rproc, const struct firmware *fw) > const char *name = rproc->firmware; > struct device *dev = &rproc->dev; > struct elf32_hdr *ehdr; This is confusing because this function handles elf64 and elf32, i suggest using e_ident table pointer directly, or adding a comment as in remoteproc_elf_loader.h > + u32 elf_shdr_size; > + u64 phoff, shoff; > char class; > + u16 phnum; > > if (!fw) { > dev_err(dev, "failed to load %s\n", name); > @@ -58,9 +62,13 @@ int rproc_elf_sanity_check(struct rproc *rproc, const struct firmware *fw) > > ehdr = (struct elf32_hdr *)fw->data; > > - /* We only support ELF32 at this point */ > + if (memcmp(ehdr->e_ident, ELFMAG, SELFMAG)) { > + dev_err(dev, "Image is corrupted (bad magic)\n"); > + return -EINVAL; > + } > + > class = ehdr->e_ident[EI_CLASS]; > - if (class != ELFCLASS32) { > + if (class != ELFCLASS32 && class != ELFCLASS64) { > dev_err(dev, "Unsupported class: %d\n", class); > return -EINVAL; > } > @@ -75,26 +83,29 @@ int rproc_elf_sanity_check(struct rproc *rproc, const struct firmware *fw) > return -EINVAL; > } > > - if (fw->size < ehdr->e_shoff + sizeof(struct elf32_shdr)) { > - dev_err(dev, "Image is too small\n"); > - return -EINVAL; > - } > + phoff = elf_hdr_e_phoff(class, fw->data); > + shoff = elf_hdr_e_shoff(class, fw->data); > + phnum = elf_hdr_e_phnum(class, fw->data); > + elf_shdr_size = elf_size_of_shdr(class); > > - if (memcmp(ehdr->e_ident, ELFMAG, SELFMAG)) { > - dev_err(dev, "Image is corrupted (bad magic)\n"); > + if (fw->size < shoff + elf_shdr_size) { > + dev_err(dev, "Image is too small\n"); > return -EINVAL; > } > > - if (ehdr->e_phnum == 0) { > + if (phnum == 0) { > dev_err(dev, "No loadable segments\n"); > return -EINVAL; > } > > - if (ehdr->e_phoff > fw->size) { > + if (phoff > fw->size) { > dev_err(dev, "Firmware size is too small\n"); > return -EINVAL; > } > > + dev_dbg(dev, "Firmware is an elf%d file\n", > + class == ELFCLASS32 ? 32 : 64); > + > return 0; > } > EXPORT_SYMBOL(rproc_elf_sanity_check); > @@ -110,11 +121,9 @@ EXPORT_SYMBOL(rproc_elf_sanity_check); > * Note that the boot address is not a configurable property of all remote > * processors. Some will always boot at a specific hard-coded address. > */ > -u32 rproc_elf_get_boot_addr(struct rproc *rproc, const struct firmware *fw) > +u64 rproc_elf_get_boot_addr(struct rproc *rproc, const struct firmware *fw) > { > - struct elf32_hdr *ehdr = (struct elf32_hdr *)fw->data; > - > - return ehdr->e_entry; > + return elf_hdr_e_entry(fw_elf_get_class(fw), fw->data); > } > EXPORT_SYMBOL(rproc_elf_get_boot_addr); > > @@ -145,37 +154,41 @@ EXPORT_SYMBOL(rproc_elf_get_boot_addr); > int rproc_elf_load_segments(struct rproc *rproc, const struct firmware *fw) > { > struct device *dev = &rproc->dev; > - struct elf32_hdr *ehdr; > - struct elf32_phdr *phdr; > + const void *ehdr, *phdr; > int i, ret = 0; > + u16 phnum; > const u8 *elf_data = fw->data; > + u8 class = fw_elf_get_class(fw); > + u32 elf_phdr_size = elf_size_of_phdr(class); > > - ehdr = (struct elf32_hdr *)elf_data; > - phdr = (struct elf32_phdr *)(elf_data + ehdr->e_phoff); > + ehdr = elf_data; > + phnum = elf_hdr_e_phnum(class, ehdr); > + phdr = elf_data + elf_hdr_e_phoff(class, ehdr); > > /* go through the available ELF segments */ > - for (i = 0; i < ehdr->e_phnum; i++, phdr++) { > - u32 da = phdr->p_paddr; > - u32 memsz = phdr->p_memsz; > - u32 filesz = phdr->p_filesz; > - u32 offset = phdr->p_offset; > + for (i = 0; i < phnum; i++, phdr += elf_phdr_size) { > + u64 da = elf_phdr_p_paddr(class, phdr); > + u64 memsz = elf_phdr_p_memsz(class, phdr); > + u64 filesz = elf_phdr_p_filesz(class, phdr); > + u64 offset = elf_phdr_p_offset(class, phdr); > + u32 type = elf_phdr_p_type(class, phdr); > void *ptr; > > - if (phdr->p_type != PT_LOAD) > + if (type != PT_LOAD) > continue; > > - dev_dbg(dev, "phdr: type %d da 0x%x memsz 0x%x filesz 0x%x\n", > - phdr->p_type, da, memsz, filesz); > + dev_dbg(dev, "phdr: type %d da 0x%llx memsz 0x%llx filesz 0x%llx\n", > + type, da, memsz, filesz); > > if (filesz > memsz) { > - dev_err(dev, "bad phdr filesz 0x%x memsz 0x%x\n", > + dev_err(dev, "bad phdr filesz 0x%llx memsz 0x%llx\n", > filesz, memsz); > ret = -EINVAL; > break; > } > > if (offset + filesz > fw->size) { > - dev_err(dev, "truncated fw: need 0x%x avail 0x%zx\n", > + dev_err(dev, "truncated fw: need 0x%llx avail 0x%zx\n", > offset + filesz, fw->size); > ret = -EINVAL; > break; > @@ -184,14 +197,15 @@ int rproc_elf_load_segments(struct rproc *rproc, const struct firmware *fw) > /* grab the kernel address for this device address */ > ptr = rproc_da_to_va(rproc, da, memsz); > if (!ptr) { > - dev_err(dev, "bad phdr da 0x%x mem 0x%x\n", da, memsz); > + dev_err(dev, "bad phdr da 0x%llx mem 0x%llx\n", da, > + memsz); > ret = -EINVAL; > break; > } > > /* put the segment where the remote processor expects it */ > - if (phdr->p_filesz) > - memcpy(ptr, elf_data + phdr->p_offset, filesz); > + if (filesz) > + memcpy(ptr, elf_data + offset, filesz); > > /* > * Zero out remaining memory for this segment. > @@ -208,24 +222,32 @@ int rproc_elf_load_segments(struct rproc *rproc, const struct firmware *fw) > } > EXPORT_SYMBOL(rproc_elf_load_segments); > > -static struct elf32_shdr * > -find_table(struct device *dev, struct elf32_hdr *ehdr, size_t fw_size) > +static const void * > +find_table(struct device *dev, const struct firmware *fw) > { > - struct elf32_shdr *shdr; > + const void *shdr, *name_table_shdr; > int i; > const char *name_table; > struct resource_table *table = NULL; > - const u8 *elf_data = (void *)ehdr; > + const u8 *elf_data = (void *)fw->data; > + u8 class = fw_elf_get_class(fw); > + size_t fw_size = fw->size; > + const void *ehdr = elf_data; > + u16 shnum = elf_hdr_e_shnum(class, ehdr); > + u32 elf_shdr_size = elf_size_of_shdr(class); > + u16 shstrndx = elf_hdr_e_shstrndx(class, ehdr); > > /* look for the resource table and handle it */ > - shdr = (struct elf32_shdr *)(elf_data + ehdr->e_shoff); > - name_table = elf_data + shdr[ehdr->e_shstrndx].sh_offset; > + shdr = elf_data + elf_hdr_e_shoff(class, ehdr); > + name_table_shdr = shdr + (shstrndx * elf_shdr_size); > + name_table = elf_data + elf_shdr_sh_offset(class, name_table_shdr); > > - for (i = 0; i < ehdr->e_shnum; i++, shdr++) { > - u32 size = shdr->sh_size; > - u32 offset = shdr->sh_offset; > + for (i = 0; i < shnum; i++, shdr += elf_shdr_size) { > + u64 size = elf_shdr_sh_size(class, shdr); > + u64 offset = elf_shdr_sh_offset(class, shdr); > + u32 name = elf_shdr_sh_name(class, shdr); > > - if (strcmp(name_table + shdr->sh_name, ".resource_table")) > + if (strcmp(name_table + name, ".resource_table")) > continue; > > table = (struct resource_table *)(elf_data + offset); > @@ -279,21 +301,21 @@ find_table(struct device *dev, struct elf32_hdr *ehdr, size_t fw_size) > */ > int rproc_elf_load_rsc_table(struct rproc *rproc, const struct firmware *fw) > { > - struct elf32_hdr *ehdr; > - struct elf32_shdr *shdr; > + const void *shdr; > struct device *dev = &rproc->dev; > struct resource_table *table = NULL; > const u8 *elf_data = fw->data; > size_t tablesz; > + u8 class = fw_elf_get_class(fw); > + u64 sh_offset; > > - ehdr = (struct elf32_hdr *)elf_data; > - > - shdr = find_table(dev, ehdr, fw->size); > + shdr = find_table(dev, fw); > if (!shdr) > return -EINVAL; > > - table = (struct resource_table *)(elf_data + shdr->sh_offset); > - tablesz = shdr->sh_size; > + sh_offset = elf_shdr_sh_offset(class, shdr); > + table = (struct resource_table *)(elf_data + sh_offset); > + tablesz = elf_shdr_sh_size(class, shdr); > > /* > * Create a copy of the resource table. When a virtio device starts > @@ -326,13 +348,17 @@ EXPORT_SYMBOL(rproc_elf_load_rsc_table); > struct resource_table *rproc_elf_find_loaded_rsc_table(struct rproc *rproc, > const struct firmware *fw) > { > - struct elf32_hdr *ehdr = (struct elf32_hdr *)fw->data; > - struct elf32_shdr *shdr; > + const void *shdr; > + u64 sh_addr, sh_size; > + u8 class = fw_elf_get_class(fw); > > - shdr = find_table(&rproc->dev, ehdr, fw->size); > + shdr = find_table(&rproc->dev, fw); > if (!shdr) > return NULL; > > - return rproc_da_to_va(rproc, shdr->sh_addr, shdr->sh_size); > + sh_addr = elf_shdr_sh_addr(class, shdr); > + sh_size = elf_shdr_sh_size(class, shdr); > + > + return rproc_da_to_va(rproc, sh_addr, sh_size); > } > EXPORT_SYMBOL(rproc_elf_find_loaded_rsc_table); > diff --git a/drivers/remoteproc/remoteproc_elf_loader.h b/drivers/remoteproc/remoteproc_elf_loader.h > new file mode 100644 > index 000000000000..e37a55c61eae > --- /dev/null > +++ b/drivers/remoteproc/remoteproc_elf_loader.h > @@ -0,0 +1,78 @@ > +/* SPDX-License-Identifier: GPL-2.0 */ > +/* > + * Remote processor elf loader defines > + * > + * Copyright (C) 2019 Kalray, Inc. The rest of the header should be cleaned > + * > + * This software is licensed under the terms of the GNU General Public > + * License version 2, as published by the Free Software Foundation, and > + * may be copied, distributed, and modified under those terms. > + * > + * This program is distributed in the hope that it will be useful, > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + * GNU General Public License for more details. > + */ > + > +#ifndef REMOTEPROC_ELF_LOADER_H > +#define REMOTEPROC_ELF_LOADER_H > + > +#include <linux/elf.h> > +#include <linux/types.h> > + > +/** > + * fw_elf_get_class - Get elf class > + * @fw: the ELF firmware image > + * > + * Note that we use and elf32_hdr to access the class since the start of the > + * struct is the same for both elf class > + * > + * Return: elf class of the firmware > + */ > +static inline u8 fw_elf_get_class(const struct firmware *fw) > +{ > + struct elf32_hdr *ehdr = (struct elf32_hdr *)fw->data; > + > + return ehdr->e_ident[EI_CLASS]; > +} > + > +#define ELF_GET_FIELD(__s, __field, __type) \ > +static inline __type elf_##__s##_##__field(u8 class, const void *arg) \ > +{ \ > + if (class == ELFCLASS32) \ > + return (__type) ((const struct elf32_##__s *) arg)->__field; \ > + else \ > + return (__type) ((const struct elf64_##__s *) arg)->__field; \ > +} > + > +ELF_GET_FIELD(hdr, e_entry, u64) > +ELF_GET_FIELD(hdr, e_phnum, u16) > +ELF_GET_FIELD(hdr, e_shnum, u16) > +ELF_GET_FIELD(hdr, e_phoff, u64) > +ELF_GET_FIELD(hdr, e_shoff, u64) > +ELF_GET_FIELD(hdr, e_shstrndx, u16) > + > +ELF_GET_FIELD(phdr, p_paddr, u64) > +ELF_GET_FIELD(phdr, p_filesz, u64) > +ELF_GET_FIELD(phdr, p_memsz, u64) > +ELF_GET_FIELD(phdr, p_type, u32) > +ELF_GET_FIELD(phdr, p_offset, u64) > + > +ELF_GET_FIELD(shdr, sh_size, u64) > +ELF_GET_FIELD(shdr, sh_offset, u64) > +ELF_GET_FIELD(shdr, sh_name, u32) > +ELF_GET_FIELD(shdr, sh_addr, u64) > + > +#define ELF_STRUCT_SIZE(__s) \ > +static inline unsigned long elf_size_of_##__s(u8 class) \ > +{ \ > + if (class == ELFCLASS32)\ > + return sizeof(struct elf32_##__s); \ > + else \ > + return sizeof(struct elf64_##__s); \ > +} > + > +ELF_STRUCT_SIZE(shdr) > +ELF_STRUCT_SIZE(phdr) > + > +#endif /* REMOTEPROC_ELF_LOADER_H */ > diff --git a/drivers/remoteproc/remoteproc_internal.h b/drivers/remoteproc/remoteproc_internal.h > index b02b15f74a5e..6d4a5ffcb28b 100644 > --- a/drivers/remoteproc/remoteproc_internal.h > +++ b/drivers/remoteproc/remoteproc_internal.h > @@ -55,7 +55,7 @@ void *rproc_da_to_va(struct rproc *rproc, u64 da, int len); > int rproc_trigger_recovery(struct rproc *rproc); > > int rproc_elf_sanity_check(struct rproc *rproc, const struct firmware *fw); > -u32 rproc_elf_get_boot_addr(struct rproc *rproc, const struct firmware *fw); > +u64 rproc_elf_get_boot_addr(struct rproc *rproc, const struct firmware *fw); > int rproc_elf_load_segments(struct rproc *rproc, const struct firmware *fw); > int rproc_elf_load_rsc_table(struct rproc *rproc, const struct firmware *fw); > struct resource_table *rproc_elf_find_loaded_rsc_table(struct rproc *rproc, > diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h > index a3edd981220e..9a7c4c3f1c92 100644 > --- a/include/linux/remoteproc.h > +++ b/include/linux/remoteproc.h > @@ -381,7 +381,7 @@ struct rproc_ops { > struct rproc *rproc, const struct firmware *fw); > int (*load)(struct rproc *rproc, const struct firmware *fw); > int (*sanity_check)(struct rproc *rproc, const struct firmware *fw); > - u32 (*get_boot_addr)(struct rproc *rproc, const struct firmware *fw); > + u64 (*get_boot_addr)(struct rproc *rproc, const struct firmware *fw); > }; > > /** > @@ -497,7 +497,7 @@ struct rproc { > int num_traces; > struct list_head carveouts; > struct list_head mappings; > - u32 bootaddr; > + u64 bootaddr; This generates a warning in remote proc: drivers/remoteproc/st_remoteproc.c:196:24: warning: format ‘%x’ expects argument of type ‘unsigned int’, but argument 3 has type ‘u64’ {aka ‘long long unsigned int’} [-Wformat=] dev_info(&rproc->dev, "Started from 0x%x\n", rproc->bootaddr); > struct list_head rvdevs; > struct list_head subdevs; > struct idr notifyids; >
Thanks Arnaud, I will apply your comment in patch V2. Regards, Clément On 7 May, 2019, at 15:37, Arnaud Pouliquen wrote: > Hi Clément, > > I tested your patch on stm32MP1, no regression observed when loading my > ELF32 firmware. > Now i'm not enough expert on the loader to ack your patch. > For stm32 MP1 platform: > Tested-by: Arnaud POULIQUEN <arnaud.pouliquen@st.com> > > Please find few remarks in your code > > Regards > Arnaud > > On 5/7/19 2:09 PM, Clément Leger wrote: >> Ping ? >> >> ----- Original Message ----- >> From: "Clément Leger" <cleger@kalray.eu> >> To: "linux-remoteproc" <linux-remoteproc@vger.kernel.org>, "Ohad Ben-Cohen" >> <ohad@wizery.com>, "Bjorn Andersson" <bjorn.andersson@linaro.org> >> Cc: "Loic PALLARDY" <loic.pallardy@st.com> >> Sent: Tuesday, 2 April, 2019 10:28:56 >> Subject: [RFC PATCH] rproc: Add elf64 support in elf loader >> >> elf32 and elf64 mainly differ by their types. In order to avoid >> copy/pasting the whole loader code, generate static inline functions >> which will access values according to the elf class. It allows to keep a >> common loader basis. >> In order to accomodate both elf types sizes, the maximum size for a >> elf header member is chosen using the maximum value of both elf class. >> >> Signed-off-by: Clement Leger <clement.leger@kalray.eu> >> --- >> drivers/remoteproc/remoteproc_elf_loader.c | 130 +++++++++++++++++------------ >> drivers/remoteproc/remoteproc_elf_loader.h | 78 +++++++++++++++++ >> drivers/remoteproc/remoteproc_internal.h | 2 +- >> include/linux/remoteproc.h | 4 +- >> 4 files changed, 159 insertions(+), 55 deletions(-) >> create mode 100644 drivers/remoteproc/remoteproc_elf_loader.h >> >> diff --git a/drivers/remoteproc/remoteproc_elf_loader.c >> b/drivers/remoteproc/remoteproc_elf_loader.c >> index b17d72ec8603..f6aefa46e45c 100644 >> --- a/drivers/remoteproc/remoteproc_elf_loader.c >> +++ b/drivers/remoteproc/remoteproc_elf_loader.c >> @@ -31,6 +31,7 @@ >> #include <linux/elf.h> >> >> #include "remoteproc_internal.h" >> +#include "remoteproc_elf_loader.h" >> >> /** >> * rproc_elf_sanity_check() - Sanity Check ELF firmware image >> @@ -44,7 +45,10 @@ int rproc_elf_sanity_check(struct rproc *rproc, const struct >> firmware *fw) >> const char *name = rproc->firmware; >> struct device *dev = &rproc->dev; >> struct elf32_hdr *ehdr; > This is confusing because this function handles elf64 and elf32, i > suggest using e_ident table pointer directly, or adding a comment as in > remoteproc_elf_loader.h >> + u32 elf_shdr_size; >> + u64 phoff, shoff; >> char class; >> + u16 phnum; >> >> if (!fw) { >> dev_err(dev, "failed to load %s\n", name); >> @@ -58,9 +62,13 @@ int rproc_elf_sanity_check(struct rproc *rproc, const struct >> firmware *fw) >> >> ehdr = (struct elf32_hdr *)fw->data; >> >> - /* We only support ELF32 at this point */ >> + if (memcmp(ehdr->e_ident, ELFMAG, SELFMAG)) { >> + dev_err(dev, "Image is corrupted (bad magic)\n"); >> + return -EINVAL; >> + } >> + >> class = ehdr->e_ident[EI_CLASS]; >> - if (class != ELFCLASS32) { >> + if (class != ELFCLASS32 && class != ELFCLASS64) { >> dev_err(dev, "Unsupported class: %d\n", class); >> return -EINVAL; >> } >> @@ -75,26 +83,29 @@ int rproc_elf_sanity_check(struct rproc *rproc, const struct >> firmware *fw) >> return -EINVAL; >> } >> >> - if (fw->size < ehdr->e_shoff + sizeof(struct elf32_shdr)) { >> - dev_err(dev, "Image is too small\n"); >> - return -EINVAL; >> - } >> + phoff = elf_hdr_e_phoff(class, fw->data); >> + shoff = elf_hdr_e_shoff(class, fw->data); >> + phnum = elf_hdr_e_phnum(class, fw->data); >> + elf_shdr_size = elf_size_of_shdr(class); >> >> - if (memcmp(ehdr->e_ident, ELFMAG, SELFMAG)) { >> - dev_err(dev, "Image is corrupted (bad magic)\n"); >> + if (fw->size < shoff + elf_shdr_size) { >> + dev_err(dev, "Image is too small\n"); >> return -EINVAL; >> } >> >> - if (ehdr->e_phnum == 0) { >> + if (phnum == 0) { >> dev_err(dev, "No loadable segments\n"); >> return -EINVAL; >> } >> >> - if (ehdr->e_phoff > fw->size) { >> + if (phoff > fw->size) { >> dev_err(dev, "Firmware size is too small\n"); >> return -EINVAL; >> } >> >> + dev_dbg(dev, "Firmware is an elf%d file\n", >> + class == ELFCLASS32 ? 32 : 64); >> + >> return 0; >> } >> EXPORT_SYMBOL(rproc_elf_sanity_check); >> @@ -110,11 +121,9 @@ EXPORT_SYMBOL(rproc_elf_sanity_check); >> * Note that the boot address is not a configurable property of all remote >> * processors. Some will always boot at a specific hard-coded address. >> */ >> -u32 rproc_elf_get_boot_addr(struct rproc *rproc, const struct firmware *fw) >> +u64 rproc_elf_get_boot_addr(struct rproc *rproc, const struct firmware *fw) >> { >> - struct elf32_hdr *ehdr = (struct elf32_hdr *)fw->data; >> - >> - return ehdr->e_entry; >> + return elf_hdr_e_entry(fw_elf_get_class(fw), fw->data); >> } >> EXPORT_SYMBOL(rproc_elf_get_boot_addr); >> >> @@ -145,37 +154,41 @@ EXPORT_SYMBOL(rproc_elf_get_boot_addr); >> int rproc_elf_load_segments(struct rproc *rproc, const struct firmware *fw) >> { >> struct device *dev = &rproc->dev; >> - struct elf32_hdr *ehdr; >> - struct elf32_phdr *phdr; >> + const void *ehdr, *phdr; >> int i, ret = 0; >> + u16 phnum; >> const u8 *elf_data = fw->data; >> + u8 class = fw_elf_get_class(fw); >> + u32 elf_phdr_size = elf_size_of_phdr(class); >> >> - ehdr = (struct elf32_hdr *)elf_data; >> - phdr = (struct elf32_phdr *)(elf_data + ehdr->e_phoff); >> + ehdr = elf_data; >> + phnum = elf_hdr_e_phnum(class, ehdr); >> + phdr = elf_data + elf_hdr_e_phoff(class, ehdr); >> >> /* go through the available ELF segments */ >> - for (i = 0; i < ehdr->e_phnum; i++, phdr++) { >> - u32 da = phdr->p_paddr; >> - u32 memsz = phdr->p_memsz; >> - u32 filesz = phdr->p_filesz; >> - u32 offset = phdr->p_offset; >> + for (i = 0; i < phnum; i++, phdr += elf_phdr_size) { >> + u64 da = elf_phdr_p_paddr(class, phdr); >> + u64 memsz = elf_phdr_p_memsz(class, phdr); >> + u64 filesz = elf_phdr_p_filesz(class, phdr); >> + u64 offset = elf_phdr_p_offset(class, phdr); >> + u32 type = elf_phdr_p_type(class, phdr); >> void *ptr; >> >> - if (phdr->p_type != PT_LOAD) >> + if (type != PT_LOAD) >> continue; >> >> - dev_dbg(dev, "phdr: type %d da 0x%x memsz 0x%x filesz 0x%x\n", >> - phdr->p_type, da, memsz, filesz); >> + dev_dbg(dev, "phdr: type %d da 0x%llx memsz 0x%llx filesz 0x%llx\n", >> + type, da, memsz, filesz); >> >> if (filesz > memsz) { >> - dev_err(dev, "bad phdr filesz 0x%x memsz 0x%x\n", >> + dev_err(dev, "bad phdr filesz 0x%llx memsz 0x%llx\n", >> filesz, memsz); >> ret = -EINVAL; >> break; >> } >> >> if (offset + filesz > fw->size) { >> - dev_err(dev, "truncated fw: need 0x%x avail 0x%zx\n", >> + dev_err(dev, "truncated fw: need 0x%llx avail 0x%zx\n", >> offset + filesz, fw->size); >> ret = -EINVAL; >> break; >> @@ -184,14 +197,15 @@ int rproc_elf_load_segments(struct rproc *rproc, const >> struct firmware *fw) >> /* grab the kernel address for this device address */ >> ptr = rproc_da_to_va(rproc, da, memsz); >> if (!ptr) { >> - dev_err(dev, "bad phdr da 0x%x mem 0x%x\n", da, memsz); >> + dev_err(dev, "bad phdr da 0x%llx mem 0x%llx\n", da, >> + memsz); >> ret = -EINVAL; >> break; >> } >> >> /* put the segment where the remote processor expects it */ >> - if (phdr->p_filesz) >> - memcpy(ptr, elf_data + phdr->p_offset, filesz); >> + if (filesz) >> + memcpy(ptr, elf_data + offset, filesz); >> >> /* >> * Zero out remaining memory for this segment. >> @@ -208,24 +222,32 @@ int rproc_elf_load_segments(struct rproc *rproc, const >> struct firmware *fw) >> } >> EXPORT_SYMBOL(rproc_elf_load_segments); >> >> -static struct elf32_shdr * >> -find_table(struct device *dev, struct elf32_hdr *ehdr, size_t fw_size) >> +static const void * >> +find_table(struct device *dev, const struct firmware *fw) >> { >> - struct elf32_shdr *shdr; >> + const void *shdr, *name_table_shdr; >> int i; >> const char *name_table; >> struct resource_table *table = NULL; >> - const u8 *elf_data = (void *)ehdr; >> + const u8 *elf_data = (void *)fw->data; >> + u8 class = fw_elf_get_class(fw); >> + size_t fw_size = fw->size; >> + const void *ehdr = elf_data; >> + u16 shnum = elf_hdr_e_shnum(class, ehdr); >> + u32 elf_shdr_size = elf_size_of_shdr(class); >> + u16 shstrndx = elf_hdr_e_shstrndx(class, ehdr); >> >> /* look for the resource table and handle it */ >> - shdr = (struct elf32_shdr *)(elf_data + ehdr->e_shoff); >> - name_table = elf_data + shdr[ehdr->e_shstrndx].sh_offset; >> + shdr = elf_data + elf_hdr_e_shoff(class, ehdr); >> + name_table_shdr = shdr + (shstrndx * elf_shdr_size); >> + name_table = elf_data + elf_shdr_sh_offset(class, name_table_shdr); >> >> - for (i = 0; i < ehdr->e_shnum; i++, shdr++) { >> - u32 size = shdr->sh_size; >> - u32 offset = shdr->sh_offset; >> + for (i = 0; i < shnum; i++, shdr += elf_shdr_size) { >> + u64 size = elf_shdr_sh_size(class, shdr); >> + u64 offset = elf_shdr_sh_offset(class, shdr); >> + u32 name = elf_shdr_sh_name(class, shdr); >> >> - if (strcmp(name_table + shdr->sh_name, ".resource_table")) >> + if (strcmp(name_table + name, ".resource_table")) >> continue; >> >> table = (struct resource_table *)(elf_data + offset); >> @@ -279,21 +301,21 @@ find_table(struct device *dev, struct elf32_hdr *ehdr, >> size_t fw_size) >> */ >> int rproc_elf_load_rsc_table(struct rproc *rproc, const struct firmware *fw) >> { >> - struct elf32_hdr *ehdr; >> - struct elf32_shdr *shdr; >> + const void *shdr; >> struct device *dev = &rproc->dev; >> struct resource_table *table = NULL; >> const u8 *elf_data = fw->data; >> size_t tablesz; >> + u8 class = fw_elf_get_class(fw); >> + u64 sh_offset; >> >> - ehdr = (struct elf32_hdr *)elf_data; >> - >> - shdr = find_table(dev, ehdr, fw->size); >> + shdr = find_table(dev, fw); >> if (!shdr) >> return -EINVAL; >> >> - table = (struct resource_table *)(elf_data + shdr->sh_offset); >> - tablesz = shdr->sh_size; >> + sh_offset = elf_shdr_sh_offset(class, shdr); >> + table = (struct resource_table *)(elf_data + sh_offset); >> + tablesz = elf_shdr_sh_size(class, shdr); >> >> /* >> * Create a copy of the resource table. When a virtio device starts >> @@ -326,13 +348,17 @@ EXPORT_SYMBOL(rproc_elf_load_rsc_table); >> struct resource_table *rproc_elf_find_loaded_rsc_table(struct rproc *rproc, >> const struct firmware *fw) >> { >> - struct elf32_hdr *ehdr = (struct elf32_hdr *)fw->data; >> - struct elf32_shdr *shdr; >> + const void *shdr; >> + u64 sh_addr, sh_size; >> + u8 class = fw_elf_get_class(fw); >> >> - shdr = find_table(&rproc->dev, ehdr, fw->size); >> + shdr = find_table(&rproc->dev, fw); >> if (!shdr) >> return NULL; >> >> - return rproc_da_to_va(rproc, shdr->sh_addr, shdr->sh_size); >> + sh_addr = elf_shdr_sh_addr(class, shdr); >> + sh_size = elf_shdr_sh_size(class, shdr); >> + >> + return rproc_da_to_va(rproc, sh_addr, sh_size); >> } >> EXPORT_SYMBOL(rproc_elf_find_loaded_rsc_table); >> diff --git a/drivers/remoteproc/remoteproc_elf_loader.h >> b/drivers/remoteproc/remoteproc_elf_loader.h >> new file mode 100644 >> index 000000000000..e37a55c61eae >> --- /dev/null >> +++ b/drivers/remoteproc/remoteproc_elf_loader.h >> @@ -0,0 +1,78 @@ >> +/* SPDX-License-Identifier: GPL-2.0 */ >> +/* >> + * Remote processor elf loader defines >> + * >> + * Copyright (C) 2019 Kalray, Inc. > The rest of the header should be cleaned >> + * >> + * This software is licensed under the terms of the GNU General Public >> + * License version 2, as published by the Free Software Foundation, and >> + * may be copied, distributed, and modified under those terms. >> + * >> + * This program is distributed in the hope that it will be useful, >> + * but WITHOUT ANY WARRANTY; without even the implied warranty of >> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the >> + * GNU General Public License for more details. >> + */ >> + >> +#ifndef REMOTEPROC_ELF_LOADER_H >> +#define REMOTEPROC_ELF_LOADER_H >> + >> +#include <linux/elf.h> >> +#include <linux/types.h> >> + >> +/** >> + * fw_elf_get_class - Get elf class >> + * @fw: the ELF firmware image >> + * >> + * Note that we use and elf32_hdr to access the class since the start of the >> + * struct is the same for both elf class >> + * >> + * Return: elf class of the firmware >> + */ >> +static inline u8 fw_elf_get_class(const struct firmware *fw) >> +{ >> + struct elf32_hdr *ehdr = (struct elf32_hdr *)fw->data; >> + >> + return ehdr->e_ident[EI_CLASS]; >> +} >> + >> +#define ELF_GET_FIELD(__s, __field, __type) \ >> +static inline __type elf_##__s##_##__field(u8 class, const void *arg) \ >> +{ \ >> + if (class == ELFCLASS32) \ >> + return (__type) ((const struct elf32_##__s *) arg)->__field; \ >> + else \ >> + return (__type) ((const struct elf64_##__s *) arg)->__field; \ >> +} >> + >> +ELF_GET_FIELD(hdr, e_entry, u64) >> +ELF_GET_FIELD(hdr, e_phnum, u16) >> +ELF_GET_FIELD(hdr, e_shnum, u16) >> +ELF_GET_FIELD(hdr, e_phoff, u64) >> +ELF_GET_FIELD(hdr, e_shoff, u64) >> +ELF_GET_FIELD(hdr, e_shstrndx, u16) >> + >> +ELF_GET_FIELD(phdr, p_paddr, u64) >> +ELF_GET_FIELD(phdr, p_filesz, u64) >> +ELF_GET_FIELD(phdr, p_memsz, u64) >> +ELF_GET_FIELD(phdr, p_type, u32) >> +ELF_GET_FIELD(phdr, p_offset, u64) >> + >> +ELF_GET_FIELD(shdr, sh_size, u64) >> +ELF_GET_FIELD(shdr, sh_offset, u64) >> +ELF_GET_FIELD(shdr, sh_name, u32) >> +ELF_GET_FIELD(shdr, sh_addr, u64) >> + >> +#define ELF_STRUCT_SIZE(__s) \ >> +static inline unsigned long elf_size_of_##__s(u8 class) \ >> +{ \ >> + if (class == ELFCLASS32)\ >> + return sizeof(struct elf32_##__s); \ >> + else \ >> + return sizeof(struct elf64_##__s); \ >> +} >> + >> +ELF_STRUCT_SIZE(shdr) >> +ELF_STRUCT_SIZE(phdr) >> + >> +#endif /* REMOTEPROC_ELF_LOADER_H */ >> diff --git a/drivers/remoteproc/remoteproc_internal.h >> b/drivers/remoteproc/remoteproc_internal.h >> index b02b15f74a5e..6d4a5ffcb28b 100644 >> --- a/drivers/remoteproc/remoteproc_internal.h >> +++ b/drivers/remoteproc/remoteproc_internal.h >> @@ -55,7 +55,7 @@ void *rproc_da_to_va(struct rproc *rproc, u64 da, int len); >> int rproc_trigger_recovery(struct rproc *rproc); >> >> int rproc_elf_sanity_check(struct rproc *rproc, const struct firmware *fw); >> -u32 rproc_elf_get_boot_addr(struct rproc *rproc, const struct firmware *fw); >> +u64 rproc_elf_get_boot_addr(struct rproc *rproc, const struct firmware *fw); >> int rproc_elf_load_segments(struct rproc *rproc, const struct firmware *fw); >> int rproc_elf_load_rsc_table(struct rproc *rproc, const struct firmware *fw); >> struct resource_table *rproc_elf_find_loaded_rsc_table(struct rproc *rproc, >> diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h >> index a3edd981220e..9a7c4c3f1c92 100644 >> --- a/include/linux/remoteproc.h >> +++ b/include/linux/remoteproc.h >> @@ -381,7 +381,7 @@ struct rproc_ops { >> struct rproc *rproc, const struct firmware *fw); >> int (*load)(struct rproc *rproc, const struct firmware *fw); >> int (*sanity_check)(struct rproc *rproc, const struct firmware *fw); >> - u32 (*get_boot_addr)(struct rproc *rproc, const struct firmware *fw); >> + u64 (*get_boot_addr)(struct rproc *rproc, const struct firmware *fw); >> }; >> >> /** >> @@ -497,7 +497,7 @@ struct rproc { >> int num_traces; >> struct list_head carveouts; >> struct list_head mappings; >> - u32 bootaddr; >> + u64 bootaddr; > This generates a warning in remote proc: > drivers/remoteproc/st_remoteproc.c:196:24: warning: format ‘%x’ expects > argument of type ‘unsigned int’, but argument 3 has type ‘u64’ {aka > ‘long long unsigned int’} [-Wformat=] > dev_info(&rproc->dev, "Started from 0x%x\n", rproc->bootaddr); >> struct list_head rvdevs; >> struct list_head subdevs; >> struct idr notifyids;
diff --git a/drivers/remoteproc/remoteproc_elf_loader.c b/drivers/remoteproc/remoteproc_elf_loader.c index b17d72ec8603..f6aefa46e45c 100644 --- a/drivers/remoteproc/remoteproc_elf_loader.c +++ b/drivers/remoteproc/remoteproc_elf_loader.c @@ -31,6 +31,7 @@ #include <linux/elf.h> #include "remoteproc_internal.h" +#include "remoteproc_elf_loader.h" /** * rproc_elf_sanity_check() - Sanity Check ELF firmware image @@ -44,7 +45,10 @@ int rproc_elf_sanity_check(struct rproc *rproc, const struct firmware *fw) const char *name = rproc->firmware; struct device *dev = &rproc->dev; struct elf32_hdr *ehdr; + u32 elf_shdr_size; + u64 phoff, shoff; char class; + u16 phnum; if (!fw) { dev_err(dev, "failed to load %s\n", name); @@ -58,9 +62,13 @@ int rproc_elf_sanity_check(struct rproc *rproc, const struct firmware *fw) ehdr = (struct elf32_hdr *)fw->data; - /* We only support ELF32 at this point */ + if (memcmp(ehdr->e_ident, ELFMAG, SELFMAG)) { + dev_err(dev, "Image is corrupted (bad magic)\n"); + return -EINVAL; + } + class = ehdr->e_ident[EI_CLASS]; - if (class != ELFCLASS32) { + if (class != ELFCLASS32 && class != ELFCLASS64) { dev_err(dev, "Unsupported class: %d\n", class); return -EINVAL; } @@ -75,26 +83,29 @@ int rproc_elf_sanity_check(struct rproc *rproc, const struct firmware *fw) return -EINVAL; } - if (fw->size < ehdr->e_shoff + sizeof(struct elf32_shdr)) { - dev_err(dev, "Image is too small\n"); - return -EINVAL; - } + phoff = elf_hdr_e_phoff(class, fw->data); + shoff = elf_hdr_e_shoff(class, fw->data); + phnum = elf_hdr_e_phnum(class, fw->data); + elf_shdr_size = elf_size_of_shdr(class); - if (memcmp(ehdr->e_ident, ELFMAG, SELFMAG)) { - dev_err(dev, "Image is corrupted (bad magic)\n"); + if (fw->size < shoff + elf_shdr_size) { + dev_err(dev, "Image is too small\n"); return -EINVAL; } - if (ehdr->e_phnum == 0) { + if (phnum == 0) { dev_err(dev, "No loadable segments\n"); return -EINVAL; } - if (ehdr->e_phoff > fw->size) { + if (phoff > fw->size) { dev_err(dev, "Firmware size is too small\n"); return -EINVAL; } + dev_dbg(dev, "Firmware is an elf%d file\n", + class == ELFCLASS32 ? 32 : 64); + return 0; } EXPORT_SYMBOL(rproc_elf_sanity_check); @@ -110,11 +121,9 @@ EXPORT_SYMBOL(rproc_elf_sanity_check); * Note that the boot address is not a configurable property of all remote * processors. Some will always boot at a specific hard-coded address. */ -u32 rproc_elf_get_boot_addr(struct rproc *rproc, const struct firmware *fw) +u64 rproc_elf_get_boot_addr(struct rproc *rproc, const struct firmware *fw) { - struct elf32_hdr *ehdr = (struct elf32_hdr *)fw->data; - - return ehdr->e_entry; + return elf_hdr_e_entry(fw_elf_get_class(fw), fw->data); } EXPORT_SYMBOL(rproc_elf_get_boot_addr); @@ -145,37 +154,41 @@ EXPORT_SYMBOL(rproc_elf_get_boot_addr); int rproc_elf_load_segments(struct rproc *rproc, const struct firmware *fw) { struct device *dev = &rproc->dev; - struct elf32_hdr *ehdr; - struct elf32_phdr *phdr; + const void *ehdr, *phdr; int i, ret = 0; + u16 phnum; const u8 *elf_data = fw->data; + u8 class = fw_elf_get_class(fw); + u32 elf_phdr_size = elf_size_of_phdr(class); - ehdr = (struct elf32_hdr *)elf_data; - phdr = (struct elf32_phdr *)(elf_data + ehdr->e_phoff); + ehdr = elf_data; + phnum = elf_hdr_e_phnum(class, ehdr); + phdr = elf_data + elf_hdr_e_phoff(class, ehdr); /* go through the available ELF segments */ - for (i = 0; i < ehdr->e_phnum; i++, phdr++) { - u32 da = phdr->p_paddr; - u32 memsz = phdr->p_memsz; - u32 filesz = phdr->p_filesz; - u32 offset = phdr->p_offset; + for (i = 0; i < phnum; i++, phdr += elf_phdr_size) { + u64 da = elf_phdr_p_paddr(class, phdr); + u64 memsz = elf_phdr_p_memsz(class, phdr); + u64 filesz = elf_phdr_p_filesz(class, phdr); + u64 offset = elf_phdr_p_offset(class, phdr); + u32 type = elf_phdr_p_type(class, phdr); void *ptr; - if (phdr->p_type != PT_LOAD) + if (type != PT_LOAD) continue; - dev_dbg(dev, "phdr: type %d da 0x%x memsz 0x%x filesz 0x%x\n", - phdr->p_type, da, memsz, filesz); + dev_dbg(dev, "phdr: type %d da 0x%llx memsz 0x%llx filesz 0x%llx\n", + type, da, memsz, filesz); if (filesz > memsz) { - dev_err(dev, "bad phdr filesz 0x%x memsz 0x%x\n", + dev_err(dev, "bad phdr filesz 0x%llx memsz 0x%llx\n", filesz, memsz); ret = -EINVAL; break; } if (offset + filesz > fw->size) { - dev_err(dev, "truncated fw: need 0x%x avail 0x%zx\n", + dev_err(dev, "truncated fw: need 0x%llx avail 0x%zx\n", offset + filesz, fw->size); ret = -EINVAL; break; @@ -184,14 +197,15 @@ int rproc_elf_load_segments(struct rproc *rproc, const struct firmware *fw) /* grab the kernel address for this device address */ ptr = rproc_da_to_va(rproc, da, memsz); if (!ptr) { - dev_err(dev, "bad phdr da 0x%x mem 0x%x\n", da, memsz); + dev_err(dev, "bad phdr da 0x%llx mem 0x%llx\n", da, + memsz); ret = -EINVAL; break; } /* put the segment where the remote processor expects it */ - if (phdr->p_filesz) - memcpy(ptr, elf_data + phdr->p_offset, filesz); + if (filesz) + memcpy(ptr, elf_data + offset, filesz); /* * Zero out remaining memory for this segment. @@ -208,24 +222,32 @@ int rproc_elf_load_segments(struct rproc *rproc, const struct firmware *fw) } EXPORT_SYMBOL(rproc_elf_load_segments); -static struct elf32_shdr * -find_table(struct device *dev, struct elf32_hdr *ehdr, size_t fw_size) +static const void * +find_table(struct device *dev, const struct firmware *fw) { - struct elf32_shdr *shdr; + const void *shdr, *name_table_shdr; int i; const char *name_table; struct resource_table *table = NULL; - const u8 *elf_data = (void *)ehdr; + const u8 *elf_data = (void *)fw->data; + u8 class = fw_elf_get_class(fw); + size_t fw_size = fw->size; + const void *ehdr = elf_data; + u16 shnum = elf_hdr_e_shnum(class, ehdr); + u32 elf_shdr_size = elf_size_of_shdr(class); + u16 shstrndx = elf_hdr_e_shstrndx(class, ehdr); /* look for the resource table and handle it */ - shdr = (struct elf32_shdr *)(elf_data + ehdr->e_shoff); - name_table = elf_data + shdr[ehdr->e_shstrndx].sh_offset; + shdr = elf_data + elf_hdr_e_shoff(class, ehdr); + name_table_shdr = shdr + (shstrndx * elf_shdr_size); + name_table = elf_data + elf_shdr_sh_offset(class, name_table_shdr); - for (i = 0; i < ehdr->e_shnum; i++, shdr++) { - u32 size = shdr->sh_size; - u32 offset = shdr->sh_offset; + for (i = 0; i < shnum; i++, shdr += elf_shdr_size) { + u64 size = elf_shdr_sh_size(class, shdr); + u64 offset = elf_shdr_sh_offset(class, shdr); + u32 name = elf_shdr_sh_name(class, shdr); - if (strcmp(name_table + shdr->sh_name, ".resource_table")) + if (strcmp(name_table + name, ".resource_table")) continue; table = (struct resource_table *)(elf_data + offset); @@ -279,21 +301,21 @@ find_table(struct device *dev, struct elf32_hdr *ehdr, size_t fw_size) */ int rproc_elf_load_rsc_table(struct rproc *rproc, const struct firmware *fw) { - struct elf32_hdr *ehdr; - struct elf32_shdr *shdr; + const void *shdr; struct device *dev = &rproc->dev; struct resource_table *table = NULL; const u8 *elf_data = fw->data; size_t tablesz; + u8 class = fw_elf_get_class(fw); + u64 sh_offset; - ehdr = (struct elf32_hdr *)elf_data; - - shdr = find_table(dev, ehdr, fw->size); + shdr = find_table(dev, fw); if (!shdr) return -EINVAL; - table = (struct resource_table *)(elf_data + shdr->sh_offset); - tablesz = shdr->sh_size; + sh_offset = elf_shdr_sh_offset(class, shdr); + table = (struct resource_table *)(elf_data + sh_offset); + tablesz = elf_shdr_sh_size(class, shdr); /* * Create a copy of the resource table. When a virtio device starts @@ -326,13 +348,17 @@ EXPORT_SYMBOL(rproc_elf_load_rsc_table); struct resource_table *rproc_elf_find_loaded_rsc_table(struct rproc *rproc, const struct firmware *fw) { - struct elf32_hdr *ehdr = (struct elf32_hdr *)fw->data; - struct elf32_shdr *shdr; + const void *shdr; + u64 sh_addr, sh_size; + u8 class = fw_elf_get_class(fw); - shdr = find_table(&rproc->dev, ehdr, fw->size); + shdr = find_table(&rproc->dev, fw); if (!shdr) return NULL; - return rproc_da_to_va(rproc, shdr->sh_addr, shdr->sh_size); + sh_addr = elf_shdr_sh_addr(class, shdr); + sh_size = elf_shdr_sh_size(class, shdr); + + return rproc_da_to_va(rproc, sh_addr, sh_size); } EXPORT_SYMBOL(rproc_elf_find_loaded_rsc_table); diff --git a/drivers/remoteproc/remoteproc_elf_loader.h b/drivers/remoteproc/remoteproc_elf_loader.h new file mode 100644 index 000000000000..e37a55c61eae --- /dev/null +++ b/drivers/remoteproc/remoteproc_elf_loader.h @@ -0,0 +1,78 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Remote processor elf loader defines + * + * Copyright (C) 2019 Kalray, Inc. + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef REMOTEPROC_ELF_LOADER_H +#define REMOTEPROC_ELF_LOADER_H + +#include <linux/elf.h> +#include <linux/types.h> + +/** + * fw_elf_get_class - Get elf class + * @fw: the ELF firmware image + * + * Note that we use and elf32_hdr to access the class since the start of the + * struct is the same for both elf class + * + * Return: elf class of the firmware + */ +static inline u8 fw_elf_get_class(const struct firmware *fw) +{ + struct elf32_hdr *ehdr = (struct elf32_hdr *)fw->data; + + return ehdr->e_ident[EI_CLASS]; +} + +#define ELF_GET_FIELD(__s, __field, __type) \ +static inline __type elf_##__s##_##__field(u8 class, const void *arg) \ +{ \ + if (class == ELFCLASS32) \ + return (__type) ((const struct elf32_##__s *) arg)->__field; \ + else \ + return (__type) ((const struct elf64_##__s *) arg)->__field; \ +} + +ELF_GET_FIELD(hdr, e_entry, u64) +ELF_GET_FIELD(hdr, e_phnum, u16) +ELF_GET_FIELD(hdr, e_shnum, u16) +ELF_GET_FIELD(hdr, e_phoff, u64) +ELF_GET_FIELD(hdr, e_shoff, u64) +ELF_GET_FIELD(hdr, e_shstrndx, u16) + +ELF_GET_FIELD(phdr, p_paddr, u64) +ELF_GET_FIELD(phdr, p_filesz, u64) +ELF_GET_FIELD(phdr, p_memsz, u64) +ELF_GET_FIELD(phdr, p_type, u32) +ELF_GET_FIELD(phdr, p_offset, u64) + +ELF_GET_FIELD(shdr, sh_size, u64) +ELF_GET_FIELD(shdr, sh_offset, u64) +ELF_GET_FIELD(shdr, sh_name, u32) +ELF_GET_FIELD(shdr, sh_addr, u64) + +#define ELF_STRUCT_SIZE(__s) \ +static inline unsigned long elf_size_of_##__s(u8 class) \ +{ \ + if (class == ELFCLASS32)\ + return sizeof(struct elf32_##__s); \ + else \ + return sizeof(struct elf64_##__s); \ +} + +ELF_STRUCT_SIZE(shdr) +ELF_STRUCT_SIZE(phdr) + +#endif /* REMOTEPROC_ELF_LOADER_H */ diff --git a/drivers/remoteproc/remoteproc_internal.h b/drivers/remoteproc/remoteproc_internal.h index b02b15f74a5e..6d4a5ffcb28b 100644 --- a/drivers/remoteproc/remoteproc_internal.h +++ b/drivers/remoteproc/remoteproc_internal.h @@ -55,7 +55,7 @@ void *rproc_da_to_va(struct rproc *rproc, u64 da, int len); int rproc_trigger_recovery(struct rproc *rproc); int rproc_elf_sanity_check(struct rproc *rproc, const struct firmware *fw); -u32 rproc_elf_get_boot_addr(struct rproc *rproc, const struct firmware *fw); +u64 rproc_elf_get_boot_addr(struct rproc *rproc, const struct firmware *fw); int rproc_elf_load_segments(struct rproc *rproc, const struct firmware *fw); int rproc_elf_load_rsc_table(struct rproc *rproc, const struct firmware *fw); struct resource_table *rproc_elf_find_loaded_rsc_table(struct rproc *rproc, diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h index a3edd981220e..9a7c4c3f1c92 100644 --- a/include/linux/remoteproc.h +++ b/include/linux/remoteproc.h @@ -381,7 +381,7 @@ struct rproc_ops { struct rproc *rproc, const struct firmware *fw); int (*load)(struct rproc *rproc, const struct firmware *fw); int (*sanity_check)(struct rproc *rproc, const struct firmware *fw); - u32 (*get_boot_addr)(struct rproc *rproc, const struct firmware *fw); + u64 (*get_boot_addr)(struct rproc *rproc, const struct firmware *fw); }; /** @@ -497,7 +497,7 @@ struct rproc { int num_traces; struct list_head carveouts; struct list_head mappings; - u32 bootaddr; + u64 bootaddr; struct list_head rvdevs; struct list_head subdevs; struct idr notifyids;
elf32 and elf64 mainly differ by their types. In order to avoid copy/pasting the whole loader code, generate static inline functions which will access values according to the elf class. It allows to keep a common loader basis. In order to accomodate both elf types sizes, the maximum size for a elf header member is chosen using the maximum value of both elf class. Signed-off-by: Clement Leger <clement.leger@kalray.eu> --- drivers/remoteproc/remoteproc_elf_loader.c | 130 +++++++++++++++++------------ drivers/remoteproc/remoteproc_elf_loader.h | 78 +++++++++++++++++ drivers/remoteproc/remoteproc_internal.h | 2 +- include/linux/remoteproc.h | 4 +- 4 files changed, 159 insertions(+), 55 deletions(-) create mode 100644 drivers/remoteproc/remoteproc_elf_loader.h