diff options
Diffstat (limited to 'arch/arm64/include/asm/module.h')
| -rw-r--r-- | arch/arm64/include/asm/module.h | 44 |
1 files changed, 13 insertions, 31 deletions
diff --git a/arch/arm64/include/asm/module.h b/arch/arm64/include/asm/module.h index 97d0ef12e2ff..905e1bb0e7bd 100644 --- a/arch/arm64/include/asm/module.h +++ b/arch/arm64/include/asm/module.h @@ -22,7 +22,7 @@ #ifdef CONFIG_ARM64_MODULE_PLTS struct mod_plt_sec { - struct elf64_shdr *plt; + int plt_shndx; int plt_num_entries; int plt_max_entries; }; @@ -36,10 +36,12 @@ struct mod_arch_specific { }; #endif -u64 module_emit_plt_entry(struct module *mod, void *loc, const Elf64_Rela *rela, +u64 module_emit_plt_entry(struct module *mod, Elf64_Shdr *sechdrs, + void *loc, const Elf64_Rela *rela, Elf64_Sym *sym); -u64 module_emit_veneer_for_adrp(struct module *mod, void *loc, u64 val); +u64 module_emit_veneer_for_adrp(struct module *mod, Elf64_Shdr *sechdrs, + void *loc, u64 val); #ifdef CONFIG_RANDOMIZE_BASE extern u64 module_alloc_base; @@ -56,39 +58,19 @@ struct plt_entry { * is exactly what we are dealing with here, we are free to use x16 * as a scratch register in the PLT veneers. */ - __le32 mov0; /* movn x16, #0x.... */ - __le32 mov1; /* movk x16, #0x...., lsl #16 */ - __le32 mov2; /* movk x16, #0x...., lsl #32 */ + __le32 adrp; /* adrp x16, .... */ + __le32 add; /* add x16, x16, #0x.... */ __le32 br; /* br x16 */ }; -static inline struct plt_entry get_plt_entry(u64 val) +static inline bool is_forbidden_offset_for_adrp(void *place) { - /* - * MOVK/MOVN/MOVZ opcode: - * +--------+------------+--------+-----------+-------------+---------+ - * | sf[31] | opc[30:29] | 100101 | hw[22:21] | imm16[20:5] | Rd[4:0] | - * +--------+------------+--------+-----------+-------------+---------+ - * - * Rd := 0x10 (x16) - * hw := 0b00 (no shift), 0b01 (lsl #16), 0b10 (lsl #32) - * opc := 0b11 (MOVK), 0b00 (MOVN), 0b10 (MOVZ) - * sf := 1 (64-bit variant) - */ - return (struct plt_entry){ - cpu_to_le32(0x92800010 | (((~val ) & 0xffff)) << 5), - cpu_to_le32(0xf2a00010 | ((( val >> 16) & 0xffff)) << 5), - cpu_to_le32(0xf2c00010 | ((( val >> 32) & 0xffff)) << 5), - cpu_to_le32(0xd61f0200) - }; + return IS_ENABLED(CONFIG_ARM64_ERRATUM_843419) && + cpus_have_const_cap(ARM64_WORKAROUND_843419) && + ((u64)place & 0xfff) >= 0xff8; } -static inline bool plt_entries_equal(const struct plt_entry *a, - const struct plt_entry *b) -{ - return a->mov0 == b->mov0 && - a->mov1 == b->mov1 && - a->mov2 == b->mov2; -} +struct plt_entry get_plt_entry(u64 dst, void *pc); +bool plt_entries_equal(const struct plt_entry *a, const struct plt_entry *b); #endif /* __ASM_MODULE_H */ |