mirror of https://gitee.com/openkylin/linux.git
csky: ELF and module probe
This patch adds ELF definition and module relocate codes. Signed-off-by: Guo Ren <ren_guo@c-sky.com> Reviewed-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Guo Ren
parent
a0ae62806f
commit
9d056df092
|
|
@ -0,0 +1,26 @@
|
|||
/* SPDX-License-Identifier: GPL-2.0 */
|
||||
|
||||
#ifndef __ABI_CSKY_ELF_H
|
||||
#define __ABI_CSKY_ELF_H
|
||||
|
||||
#define ELF_CORE_COPY_REGS(pr_reg, regs) do { \
|
||||
pr_reg[0] = regs->pc; \
|
||||
pr_reg[1] = regs->regs[9]; \
|
||||
pr_reg[2] = regs->usp; \
|
||||
pr_reg[3] = regs->sr; \
|
||||
pr_reg[4] = regs->a0; \
|
||||
pr_reg[5] = regs->a1; \
|
||||
pr_reg[6] = regs->a2; \
|
||||
pr_reg[7] = regs->a3; \
|
||||
pr_reg[8] = regs->regs[0]; \
|
||||
pr_reg[9] = regs->regs[1]; \
|
||||
pr_reg[10] = regs->regs[2]; \
|
||||
pr_reg[11] = regs->regs[3]; \
|
||||
pr_reg[12] = regs->regs[4]; \
|
||||
pr_reg[13] = regs->regs[5]; \
|
||||
pr_reg[14] = regs->regs[6]; \
|
||||
pr_reg[15] = regs->regs[7]; \
|
||||
pr_reg[16] = regs->regs[8]; \
|
||||
pr_reg[17] = regs->lr; \
|
||||
} while (0);
|
||||
#endif /* __ABI_CSKY_ELF_H */
|
||||
|
|
@ -0,0 +1,43 @@
|
|||
/* SPDX-License-Identifier: GPL-2.0 */
|
||||
|
||||
#ifndef __ABI_CSKY_ELF_H
|
||||
#define __ABI_CSKY_ELF_H
|
||||
|
||||
/* The member sort in array pr_reg[x] is defined by GDB. */
|
||||
#define ELF_CORE_COPY_REGS(pr_reg, regs) do { \
|
||||
pr_reg[0] = regs->pc; \
|
||||
pr_reg[1] = regs->a1; \
|
||||
pr_reg[2] = regs->a0; \
|
||||
pr_reg[3] = regs->sr; \
|
||||
pr_reg[4] = regs->a2; \
|
||||
pr_reg[5] = regs->a3; \
|
||||
pr_reg[6] = regs->regs[0]; \
|
||||
pr_reg[7] = regs->regs[1]; \
|
||||
pr_reg[8] = regs->regs[2]; \
|
||||
pr_reg[9] = regs->regs[3]; \
|
||||
pr_reg[10] = regs->regs[4]; \
|
||||
pr_reg[11] = regs->regs[5]; \
|
||||
pr_reg[12] = regs->regs[6]; \
|
||||
pr_reg[13] = regs->regs[7]; \
|
||||
pr_reg[14] = regs->regs[8]; \
|
||||
pr_reg[15] = regs->regs[9]; \
|
||||
pr_reg[16] = regs->usp; \
|
||||
pr_reg[17] = regs->lr; \
|
||||
pr_reg[18] = regs->exregs[0]; \
|
||||
pr_reg[19] = regs->exregs[1]; \
|
||||
pr_reg[20] = regs->exregs[2]; \
|
||||
pr_reg[21] = regs->exregs[3]; \
|
||||
pr_reg[22] = regs->exregs[4]; \
|
||||
pr_reg[23] = regs->exregs[5]; \
|
||||
pr_reg[24] = regs->exregs[6]; \
|
||||
pr_reg[25] = regs->exregs[7]; \
|
||||
pr_reg[26] = regs->exregs[8]; \
|
||||
pr_reg[27] = regs->exregs[9]; \
|
||||
pr_reg[28] = regs->exregs[10]; \
|
||||
pr_reg[29] = regs->exregs[11]; \
|
||||
pr_reg[30] = regs->exregs[12]; \
|
||||
pr_reg[31] = regs->exregs[13]; \
|
||||
pr_reg[32] = regs->exregs[14]; \
|
||||
pr_reg[33] = regs->tls; \
|
||||
} while (0);
|
||||
#endif /* __ABI_CSKY_ELF_H */
|
||||
|
|
@ -0,0 +1,85 @@
|
|||
/* SPDX-License-Identifier: GPL-2.0 */
|
||||
// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
|
||||
|
||||
#ifndef __ASM_CSKY_ELF_H
|
||||
#define __ASM_CSKY_ELF_H
|
||||
|
||||
#include <asm/ptrace.h>
|
||||
#include <abi/regdef.h>
|
||||
|
||||
#define ELF_ARCH 252
|
||||
|
||||
/* CSKY Relocations */
|
||||
#define R_CSKY_NONE 0
|
||||
#define R_CSKY_32 1
|
||||
#define R_CSKY_PCIMM8BY4 2
|
||||
#define R_CSKY_PCIMM11BY2 3
|
||||
#define R_CSKY_PCIMM4BY2 4
|
||||
#define R_CSKY_PC32 5
|
||||
#define R_CSKY_PCRELJSR_IMM11BY2 6
|
||||
#define R_CSKY_GNU_VTINHERIT 7
|
||||
#define R_CSKY_GNU_VTENTRY 8
|
||||
#define R_CSKY_RELATIVE 9
|
||||
#define R_CSKY_COPY 10
|
||||
#define R_CSKY_GLOB_DAT 11
|
||||
#define R_CSKY_JUMP_SLOT 12
|
||||
#define R_CSKY_ADDR_HI16 24
|
||||
#define R_CSKY_ADDR_LO16 25
|
||||
#define R_CSKY_PCRELJSR_IMM26BY2 40
|
||||
|
||||
typedef unsigned long elf_greg_t;
|
||||
|
||||
typedef struct user_fp elf_fpregset_t;
|
||||
|
||||
#define ELF_NGREG (sizeof(struct pt_regs) / sizeof(elf_greg_t))
|
||||
|
||||
typedef elf_greg_t elf_gregset_t[ELF_NGREG];
|
||||
|
||||
/*
|
||||
* This is used to ensure we don't load something for the wrong architecture.
|
||||
*/
|
||||
#define elf_check_arch(x) ((x)->e_machine == ELF_ARCH)
|
||||
|
||||
/*
|
||||
* These are used to set parameters in the core dumps.
|
||||
*/
|
||||
#define USE_ELF_CORE_DUMP
|
||||
#define ELF_EXEC_PAGESIZE 4096
|
||||
#define ELF_CLASS ELFCLASS32
|
||||
#define ELF_PLAT_INIT(_r, load_addr) { _r->a0 = 0; }
|
||||
|
||||
#ifdef __cskyBE__
|
||||
#define ELF_DATA ELFDATA2MSB
|
||||
#else
|
||||
#define ELF_DATA ELFDATA2LSB
|
||||
#endif
|
||||
|
||||
/*
|
||||
* This is the location that an ET_DYN program is loaded if exec'ed. Typical
|
||||
* use of this is to invoke "./ld.so someprog" to test out a new version of
|
||||
* the loader. We need to make sure that it is out of the way of the program
|
||||
* that it will "exec", and that there is sufficient room for the brk.
|
||||
*/
|
||||
#define ELF_ET_DYN_BASE 0x0UL
|
||||
#include <abi/elf.h>
|
||||
|
||||
/* Similar, but for a thread other than current. */
|
||||
struct task_struct;
|
||||
extern int dump_task_regs(struct task_struct *tsk, elf_gregset_t *elf_regs);
|
||||
#define ELF_CORE_COPY_TASK_REGS(tsk, elf_regs) dump_task_regs(tsk, elf_regs)
|
||||
|
||||
#define ELF_HWCAP (0)
|
||||
|
||||
/*
|
||||
* This yields a string that ld.so will use to load implementation specific
|
||||
* libraries for optimization. This is more specific in intent than poking
|
||||
* at uname or /proc/cpuinfo.
|
||||
*/
|
||||
#define ELF_PLATFORM (NULL)
|
||||
#define SET_PERSONALITY(ex) set_personality(PER_LINUX)
|
||||
|
||||
#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
|
||||
struct linux_binprm;
|
||||
extern int arch_setup_additional_pages(struct linux_binprm *bprm,
|
||||
int uses_interp);
|
||||
#endif /* __ASM_CSKY_ELF_H */
|
||||
|
|
@ -0,0 +1,92 @@
|
|||
// SPDX-License-Identifier: GPL-2.0
|
||||
// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
|
||||
|
||||
#include <linux/moduleloader.h>
|
||||
#include <linux/elf.h>
|
||||
#include <linux/mm.h>
|
||||
#include <linux/vmalloc.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/fs.h>
|
||||
#include <linux/string.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/spinlock.h>
|
||||
#include <asm/pgtable.h>
|
||||
|
||||
#if defined(__CSKYABIV2__)
|
||||
#define IS_BSR32(hi16, lo16) (((hi16) & 0xFC00) == 0xE000)
|
||||
#define IS_JSRI32(hi16, lo16) ((hi16) == 0xEAE0)
|
||||
|
||||
#define CHANGE_JSRI_TO_LRW(addr) do { \
|
||||
*(uint16_t *)(addr) = (*(uint16_t *)(addr) & 0xFF9F) | 0x001a; \
|
||||
*((uint16_t *)(addr) + 1) = *((uint16_t *)(addr) + 1) & 0xFFFF; \
|
||||
} while (0)
|
||||
|
||||
#define SET_JSR32_R26(addr) do { \
|
||||
*(uint16_t *)(addr) = 0xE8Fa; \
|
||||
*((uint16_t *)(addr) + 1) = 0x0000; \
|
||||
} while (0)
|
||||
#endif
|
||||
|
||||
int apply_relocate_add(Elf32_Shdr *sechdrs, const char *strtab,
|
||||
unsigned int symindex, unsigned int relsec, struct module *me)
|
||||
{
|
||||
unsigned int i;
|
||||
Elf32_Rela *rel = (void *) sechdrs[relsec].sh_addr;
|
||||
Elf32_Sym *sym;
|
||||
uint32_t *location;
|
||||
short *temp;
|
||||
#if defined(__CSKYABIV2__)
|
||||
uint16_t *location_tmp;
|
||||
#endif
|
||||
|
||||
for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
|
||||
/* This is where to make the change */
|
||||
location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr
|
||||
+ rel[i].r_offset;
|
||||
sym = (Elf32_Sym *)sechdrs[symindex].sh_addr
|
||||
+ ELF32_R_SYM(rel[i].r_info);
|
||||
|
||||
switch (ELF32_R_TYPE(rel[i].r_info)) {
|
||||
case R_CSKY_32:
|
||||
/* We add the value into the location given */
|
||||
*location = rel[i].r_addend + sym->st_value;
|
||||
break;
|
||||
case R_CSKY_PC32:
|
||||
/* Add the value, subtract its postition */
|
||||
*location = rel[i].r_addend + sym->st_value
|
||||
- (uint32_t)location;
|
||||
break;
|
||||
case R_CSKY_PCRELJSR_IMM11BY2:
|
||||
break;
|
||||
case R_CSKY_PCRELJSR_IMM26BY2:
|
||||
#if defined(__CSKYABIV2__)
|
||||
location_tmp = (uint16_t *)location;
|
||||
if (IS_BSR32(*location_tmp, *(location_tmp + 1)))
|
||||
break;
|
||||
|
||||
if (IS_JSRI32(*location_tmp, *(location_tmp + 1))) {
|
||||
/* jsri 0x... --> lrw r26, 0x... */
|
||||
CHANGE_JSRI_TO_LRW(location);
|
||||
/* lsli r0, r0 --> jsr r26 */
|
||||
SET_JSR32_R26(location + 1);
|
||||
}
|
||||
#endif
|
||||
break;
|
||||
case R_CSKY_ADDR_HI16:
|
||||
temp = ((short *)location) + 1;
|
||||
*temp = (short)
|
||||
((rel[i].r_addend + sym->st_value) >> 16);
|
||||
break;
|
||||
case R_CSKY_ADDR_LO16:
|
||||
temp = ((short *)location) + 1;
|
||||
*temp = (short)
|
||||
((rel[i].r_addend + sym->st_value) & 0xffff);
|
||||
break;
|
||||
default:
|
||||
pr_err("module %s: Unknown relocation: %u\n",
|
||||
me->name, ELF32_R_TYPE(rel[i].r_info));
|
||||
return -ENOEXEC;
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
Loading…
Reference in New Issue