^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * IA-64-specific support for kernel module loader.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2003 Hewlett-Packard Co
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * David Mosberger-Tang <davidm@hpl.hp.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Loosely based on patch by Rusty Russell.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) /* relocs tested so far:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) DIR64LSB
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) FPTR64LSB
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) GPREL22
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) LDXMOV
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) LDXMOV
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) LTOFF22
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) LTOFF22X
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) LTOFF22X
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) LTOFF_FPTR22
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) PCREL21B (for br.call only; br.cond is not supported out of modules!)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) PCREL60B (for brl.cond only; brl.call is not supported for modules!)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) PCREL64LSB
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) SECREL32LSB
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) SEGREL64LSB
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include <linux/elf.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include <linux/moduleloader.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #include <linux/vmalloc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #include <asm/patch.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #include <asm/unaligned.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #include <asm/sections.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #define ARCH_MODULE_DEBUG 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #if ARCH_MODULE_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) # define DEBUGP printk
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) # define inline
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) # define DEBUGP(fmt , a...)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #ifdef CONFIG_ITANIUM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) # define USE_BRL 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) # define USE_BRL 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) #define MAX_LTOFF ((uint64_t) (1 << 22)) /* max. allowable linkage-table offset */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) /* Define some relocation helper macros/types: */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) #define FORMAT_SHIFT 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) #define FORMAT_BITS 3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) #define FORMAT_MASK ((1 << FORMAT_BITS) - 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) #define VALUE_SHIFT 3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) #define VALUE_BITS 5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) #define VALUE_MASK ((1 << VALUE_BITS) - 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) enum reloc_target_format {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) /* direct encoded formats: */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) RF_NONE = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) RF_INSN14 = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) RF_INSN22 = 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) RF_INSN64 = 3,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) RF_32MSB = 4,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) RF_32LSB = 5,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) RF_64MSB = 6,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) RF_64LSB = 7,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) /* formats that cannot be directly decoded: */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) RF_INSN60,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) RF_INSN21B, /* imm21 form 1 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) RF_INSN21M, /* imm21 form 2 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) RF_INSN21F /* imm21 form 3 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) enum reloc_value_formula {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) RV_DIRECT = 4, /* S + A */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) RV_GPREL = 5, /* @gprel(S + A) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) RV_LTREL = 6, /* @ltoff(S + A) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) RV_PLTREL = 7, /* @pltoff(S + A) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) RV_FPTR = 8, /* @fptr(S + A) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) RV_PCREL = 9, /* S + A - P */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) RV_LTREL_FPTR = 10, /* @ltoff(@fptr(S + A)) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) RV_SEGREL = 11, /* @segrel(S + A) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) RV_SECREL = 12, /* @secrel(S + A) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) RV_BDREL = 13, /* BD + A */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) RV_LTV = 14, /* S + A (like RV_DIRECT, except frozen at static link-time) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) RV_PCREL2 = 15, /* S + A - P */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) RV_SPECIAL = 16, /* various (see below) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) RV_RSVD17 = 17,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) RV_TPREL = 18, /* @tprel(S + A) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) RV_LTREL_TPREL = 19, /* @ltoff(@tprel(S + A)) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) RV_DTPMOD = 20, /* @dtpmod(S + A) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) RV_LTREL_DTPMOD = 21, /* @ltoff(@dtpmod(S + A)) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) RV_DTPREL = 22, /* @dtprel(S + A) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) RV_LTREL_DTPREL = 23, /* @ltoff(@dtprel(S + A)) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) RV_RSVD24 = 24,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) RV_RSVD25 = 25,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) RV_RSVD26 = 26,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) RV_RSVD27 = 27
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) /* 28-31 reserved for implementation-specific purposes. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) #define N(reloc) [R_IA64_##reloc] = #reloc
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) static const char *reloc_name[256] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) N(NONE), N(IMM14), N(IMM22), N(IMM64),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) N(DIR32MSB), N(DIR32LSB), N(DIR64MSB), N(DIR64LSB),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) N(GPREL22), N(GPREL64I), N(GPREL32MSB), N(GPREL32LSB),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) N(GPREL64MSB), N(GPREL64LSB), N(LTOFF22), N(LTOFF64I),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) N(PLTOFF22), N(PLTOFF64I), N(PLTOFF64MSB), N(PLTOFF64LSB),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) N(FPTR64I), N(FPTR32MSB), N(FPTR32LSB), N(FPTR64MSB),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) N(FPTR64LSB), N(PCREL60B), N(PCREL21B), N(PCREL21M),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) N(PCREL21F), N(PCREL32MSB), N(PCREL32LSB), N(PCREL64MSB),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) N(PCREL64LSB), N(LTOFF_FPTR22), N(LTOFF_FPTR64I), N(LTOFF_FPTR32MSB),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) N(LTOFF_FPTR32LSB), N(LTOFF_FPTR64MSB), N(LTOFF_FPTR64LSB), N(SEGREL32MSB),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) N(SEGREL32LSB), N(SEGREL64MSB), N(SEGREL64LSB), N(SECREL32MSB),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) N(SECREL32LSB), N(SECREL64MSB), N(SECREL64LSB), N(REL32MSB),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) N(REL32LSB), N(REL64MSB), N(REL64LSB), N(LTV32MSB),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) N(LTV32LSB), N(LTV64MSB), N(LTV64LSB), N(PCREL21BI),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) N(PCREL22), N(PCREL64I), N(IPLTMSB), N(IPLTLSB),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) N(COPY), N(LTOFF22X), N(LDXMOV), N(TPREL14),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) N(TPREL22), N(TPREL64I), N(TPREL64MSB), N(TPREL64LSB),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) N(LTOFF_TPREL22), N(DTPMOD64MSB), N(DTPMOD64LSB), N(LTOFF_DTPMOD22),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) N(DTPREL14), N(DTPREL22), N(DTPREL64I), N(DTPREL32MSB),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) N(DTPREL32LSB), N(DTPREL64MSB), N(DTPREL64LSB), N(LTOFF_DTPREL22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) #undef N
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) /* Opaque struct for insns, to protect against derefs. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) struct insn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) static inline uint64_t
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) bundle (const struct insn *insn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) return (uint64_t) insn & ~0xfUL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) static inline int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) slot (const struct insn *insn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) return (uint64_t) insn & 0x3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) apply_imm64 (struct module *mod, struct insn *insn, uint64_t val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) if (slot(insn) != 1 && slot(insn) != 2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) printk(KERN_ERR "%s: invalid slot number %d for IMM64\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) mod->name, slot(insn));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) ia64_patch_imm64((u64) insn, val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) apply_imm60 (struct module *mod, struct insn *insn, uint64_t val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) if (slot(insn) != 1 && slot(insn) != 2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) printk(KERN_ERR "%s: invalid slot number %d for IMM60\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) mod->name, slot(insn));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) if (val + ((uint64_t) 1 << 59) >= (1UL << 60)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) printk(KERN_ERR "%s: value %ld out of IMM60 range\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) mod->name, (long) val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) ia64_patch_imm60((u64) insn, val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) apply_imm22 (struct module *mod, struct insn *insn, uint64_t val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) if (val + (1 << 21) >= (1 << 22)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) printk(KERN_ERR "%s: value %li out of IMM22 range\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) mod->name, (long)val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) ia64_patch((u64) insn, 0x01fffcfe000UL, ( ((val & 0x200000UL) << 15) /* bit 21 -> 36 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) | ((val & 0x1f0000UL) << 6) /* bit 16 -> 22 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) | ((val & 0x00ff80UL) << 20) /* bit 7 -> 27 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) | ((val & 0x00007fUL) << 13) /* bit 0 -> 13 */));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) apply_imm21b (struct module *mod, struct insn *insn, uint64_t val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) if (val + (1 << 20) >= (1 << 21)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) printk(KERN_ERR "%s: value %li out of IMM21b range\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) mod->name, (long)val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) ia64_patch((u64) insn, 0x11ffffe000UL, ( ((val & 0x100000UL) << 16) /* bit 20 -> 36 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) | ((val & 0x0fffffUL) << 13) /* bit 0 -> 13 */));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) #if USE_BRL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) struct plt_entry {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) /* Three instruction bundles in PLT. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) unsigned char bundle[2][16];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) static const struct plt_entry ia64_plt_template = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 0x04, 0x00, 0x00, 0x00, 0x01, 0x00, /* [MLX] nop.m 0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 0x00, 0x00, 0x00, 0x00, 0x00, 0x20, /* movl gp=TARGET_GP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 0x00, 0x00, 0x00, 0x60
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 0x05, 0x00, 0x00, 0x00, 0x01, 0x00, /* [MLX] nop.m 0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* brl.many gp=TARGET_GP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 0x08, 0x00, 0x00, 0xc0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) patch_plt (struct module *mod, struct plt_entry *plt, long target_ip, unsigned long target_gp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) if (apply_imm64(mod, (struct insn *) (plt->bundle[0] + 2), target_gp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) && apply_imm60(mod, (struct insn *) (plt->bundle[1] + 2),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) (target_ip - (int64_t) plt->bundle[1]) / 16))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) unsigned long
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) plt_target (struct plt_entry *plt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) uint64_t b0, b1, *b = (uint64_t *) plt->bundle[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) long off;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) b0 = b[0]; b1 = b[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) off = ( ((b1 & 0x00fffff000000000UL) >> 36) /* imm20b -> bit 0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) | ((b0 >> 48) << 20) | ((b1 & 0x7fffffUL) << 36) /* imm39 -> bit 20 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) | ((b1 & 0x0800000000000000UL) << 0)); /* i -> bit 59 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) return (long) plt->bundle[1] + 16*off;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) #else /* !USE_BRL */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) struct plt_entry {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) /* Three instruction bundles in PLT. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) unsigned char bundle[3][16];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) static const struct plt_entry ia64_plt_template = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 0x05, 0x00, 0x00, 0x00, 0x01, 0x00, /* [MLX] nop.m 0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* movl r16=TARGET_IP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 0x02, 0x00, 0x00, 0x60
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 0x04, 0x00, 0x00, 0x00, 0x01, 0x00, /* [MLX] nop.m 0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 0x00, 0x00, 0x00, 0x00, 0x00, 0x20, /* movl gp=TARGET_GP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 0x00, 0x00, 0x00, 0x60
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 0x11, 0x00, 0x00, 0x00, 0x01, 0x00, /* [MIB] nop.m 0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 0x60, 0x80, 0x04, 0x80, 0x03, 0x00, /* mov b6=r16 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 0x60, 0x00, 0x80, 0x00 /* br.few b6 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) patch_plt (struct module *mod, struct plt_entry *plt, long target_ip, unsigned long target_gp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) if (apply_imm64(mod, (struct insn *) (plt->bundle[0] + 2), target_ip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) && apply_imm64(mod, (struct insn *) (plt->bundle[1] + 2), target_gp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) unsigned long
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) plt_target (struct plt_entry *plt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) uint64_t b0, b1, *b = (uint64_t *) plt->bundle[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) b0 = b[0]; b1 = b[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) return ( ((b1 & 0x000007f000000000) >> 36) /* imm7b -> bit 0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) | ((b1 & 0x07fc000000000000) >> 43) /* imm9d -> bit 7 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) | ((b1 & 0x0003e00000000000) >> 29) /* imm5c -> bit 16 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) | ((b1 & 0x0000100000000000) >> 23) /* ic -> bit 21 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) | ((b0 >> 46) << 22) | ((b1 & 0x7fffff) << 40) /* imm41 -> bit 22 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) | ((b1 & 0x0800000000000000) << 4)); /* i -> bit 63 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) #endif /* !USE_BRL */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) module_arch_freeing_init (struct module *mod)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) if (mod->arch.init_unw_table) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) unw_remove_unwind_table(mod->arch.init_unw_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) mod->arch.init_unw_table = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) /* Have we already seen one of these relocations? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) /* FIXME: we could look in other sections, too --RR */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) duplicate_reloc (const Elf64_Rela *rela, unsigned int num)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) for (i = 0; i < num; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) if (rela[i].r_info == rela[num].r_info && rela[i].r_addend == rela[num].r_addend)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) /* Count how many GOT entries we may need */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) static unsigned int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) count_gots (const Elf64_Rela *rela, unsigned int num)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) unsigned int i, ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) /* Sure, this is order(n^2), but it's usually short, and not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) time critical */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) for (i = 0; i < num; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) switch (ELF64_R_TYPE(rela[i].r_info)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) case R_IA64_LTOFF22:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) case R_IA64_LTOFF22X:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) case R_IA64_LTOFF64I:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) case R_IA64_LTOFF_FPTR22:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) case R_IA64_LTOFF_FPTR64I:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) case R_IA64_LTOFF_FPTR32MSB:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) case R_IA64_LTOFF_FPTR32LSB:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) case R_IA64_LTOFF_FPTR64MSB:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) case R_IA64_LTOFF_FPTR64LSB:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) if (!duplicate_reloc(rela, i))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) ret++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) /* Count how many PLT entries we may need */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) static unsigned int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) count_plts (const Elf64_Rela *rela, unsigned int num)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) unsigned int i, ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) /* Sure, this is order(n^2), but it's usually short, and not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) time critical */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) for (i = 0; i < num; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) switch (ELF64_R_TYPE(rela[i].r_info)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) case R_IA64_PCREL21B:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) case R_IA64_PLTOFF22:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) case R_IA64_PLTOFF64I:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) case R_IA64_PLTOFF64MSB:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) case R_IA64_PLTOFF64LSB:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) case R_IA64_IPLTMSB:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) case R_IA64_IPLTLSB:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) if (!duplicate_reloc(rela, i))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) ret++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) /* We need to create an function-descriptors for any internal function
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) which is referenced. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) static unsigned int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) count_fdescs (const Elf64_Rela *rela, unsigned int num)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) unsigned int i, ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) /* Sure, this is order(n^2), but it's usually short, and not time critical. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) for (i = 0; i < num; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) switch (ELF64_R_TYPE(rela[i].r_info)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) case R_IA64_FPTR64I:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) case R_IA64_FPTR32LSB:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) case R_IA64_FPTR32MSB:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) case R_IA64_FPTR64LSB:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) case R_IA64_FPTR64MSB:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) case R_IA64_LTOFF_FPTR22:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) case R_IA64_LTOFF_FPTR32LSB:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) case R_IA64_LTOFF_FPTR32MSB:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) case R_IA64_LTOFF_FPTR64I:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) case R_IA64_LTOFF_FPTR64LSB:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) case R_IA64_LTOFF_FPTR64MSB:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) case R_IA64_IPLTMSB:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) case R_IA64_IPLTLSB:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) * Jumps to static functions sometimes go straight to their
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) * offset. Of course, that may not be possible if the jump is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) * from init -> core or vice. versa, so we need to generate an
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) * FDESC (and PLT etc) for that.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) case R_IA64_PCREL21B:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) if (!duplicate_reloc(rela, i))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) ret++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) module_frob_arch_sections (Elf_Ehdr *ehdr, Elf_Shdr *sechdrs, char *secstrings,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) struct module *mod)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) unsigned long core_plts = 0, init_plts = 0, gots = 0, fdescs = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) Elf64_Shdr *s, *sechdrs_end = sechdrs + ehdr->e_shnum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) * To store the PLTs and function-descriptors, we expand the .text section for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) * core module-code and the .init.text section for initialization code.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) for (s = sechdrs; s < sechdrs_end; ++s)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) if (strcmp(".core.plt", secstrings + s->sh_name) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) mod->arch.core_plt = s;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) else if (strcmp(".init.plt", secstrings + s->sh_name) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) mod->arch.init_plt = s;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) else if (strcmp(".got", secstrings + s->sh_name) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) mod->arch.got = s;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) else if (strcmp(".opd", secstrings + s->sh_name) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) mod->arch.opd = s;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) else if (strcmp(".IA_64.unwind", secstrings + s->sh_name) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) mod->arch.unwind = s;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) if (!mod->arch.core_plt || !mod->arch.init_plt || !mod->arch.got || !mod->arch.opd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) printk(KERN_ERR "%s: sections missing\n", mod->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) return -ENOEXEC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) /* GOT and PLTs can occur in any relocated section... */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) for (s = sechdrs + 1; s < sechdrs_end; ++s) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) const Elf64_Rela *rels = (void *)ehdr + s->sh_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) unsigned long numrels = s->sh_size/sizeof(Elf64_Rela);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) if (s->sh_type != SHT_RELA)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) gots += count_gots(rels, numrels);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) fdescs += count_fdescs(rels, numrels);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) if (strstr(secstrings + s->sh_name, ".init"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) init_plts += count_plts(rels, numrels);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) core_plts += count_plts(rels, numrels);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) mod->arch.core_plt->sh_type = SHT_NOBITS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) mod->arch.core_plt->sh_flags = SHF_EXECINSTR | SHF_ALLOC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) mod->arch.core_plt->sh_addralign = 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) mod->arch.core_plt->sh_size = core_plts * sizeof(struct plt_entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) mod->arch.init_plt->sh_type = SHT_NOBITS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) mod->arch.init_plt->sh_flags = SHF_EXECINSTR | SHF_ALLOC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) mod->arch.init_plt->sh_addralign = 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) mod->arch.init_plt->sh_size = init_plts * sizeof(struct plt_entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) mod->arch.got->sh_type = SHT_NOBITS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) mod->arch.got->sh_flags = ARCH_SHF_SMALL | SHF_ALLOC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) mod->arch.got->sh_addralign = 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) mod->arch.got->sh_size = gots * sizeof(struct got_entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) mod->arch.opd->sh_type = SHT_NOBITS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) mod->arch.opd->sh_flags = SHF_ALLOC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) mod->arch.opd->sh_addralign = 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) mod->arch.opd->sh_size = fdescs * sizeof(struct fdesc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) DEBUGP("%s: core.plt=%lx, init.plt=%lx, got=%lx, fdesc=%lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) __func__, mod->arch.core_plt->sh_size, mod->arch.init_plt->sh_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) mod->arch.got->sh_size, mod->arch.opd->sh_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) static inline int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) in_init (const struct module *mod, uint64_t addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) return addr - (uint64_t) mod->init_layout.base < mod->init_layout.size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) static inline int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) in_core (const struct module *mod, uint64_t addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) return addr - (uint64_t) mod->core_layout.base < mod->core_layout.size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) static inline int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) is_internal (const struct module *mod, uint64_t value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) return in_init(mod, value) || in_core(mod, value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) * Get gp-relative offset for the linkage-table entry of VALUE.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) static uint64_t
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) get_ltoff (struct module *mod, uint64_t value, int *okp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) struct got_entry *got, *e;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) if (!*okp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) got = (void *) mod->arch.got->sh_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) for (e = got; e < got + mod->arch.next_got_entry; ++e)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) if (e->val == value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) goto found;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) /* Not enough GOT entries? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) BUG_ON(e >= (struct got_entry *) (mod->arch.got->sh_addr + mod->arch.got->sh_size));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) e->val = value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) ++mod->arch.next_got_entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) found:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) return (uint64_t) e - mod->arch.gp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) static inline int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) gp_addressable (struct module *mod, uint64_t value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) return value - mod->arch.gp + MAX_LTOFF/2 < MAX_LTOFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) /* Get PC-relative PLT entry for this value. Returns 0 on failure. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) static uint64_t
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) get_plt (struct module *mod, const struct insn *insn, uint64_t value, int *okp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) struct plt_entry *plt, *plt_end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) uint64_t target_ip, target_gp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) if (!*okp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) if (in_init(mod, (uint64_t) insn)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) plt = (void *) mod->arch.init_plt->sh_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) plt_end = (void *) plt + mod->arch.init_plt->sh_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) plt = (void *) mod->arch.core_plt->sh_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) plt_end = (void *) plt + mod->arch.core_plt->sh_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) /* "value" is a pointer to a function-descriptor; fetch the target ip/gp from it: */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) target_ip = ((uint64_t *) value)[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) target_gp = ((uint64_t *) value)[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) /* Look for existing PLT entry. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) while (plt->bundle[0][0]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) if (plt_target(plt) == target_ip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) goto found;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) if (++plt >= plt_end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) BUG();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) *plt = ia64_plt_template;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) if (!patch_plt(mod, plt, target_ip, target_gp)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) *okp = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) #if ARCH_MODULE_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) if (plt_target(plt) != target_ip) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) printk("%s: mistargeted PLT: wanted %lx, got %lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) __func__, target_ip, plt_target(plt));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) *okp = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) found:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) return (uint64_t) plt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) /* Get function descriptor for VALUE. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) static uint64_t
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) get_fdesc (struct module *mod, uint64_t value, int *okp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) struct fdesc *fdesc = (void *) mod->arch.opd->sh_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) if (!*okp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) if (!value) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) printk(KERN_ERR "%s: fdesc for zero requested!\n", mod->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) if (!is_internal(mod, value))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) * If it's not a module-local entry-point, "value" already points to a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) * function-descriptor.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) return value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) /* Look for existing function descriptor. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) while (fdesc->ip) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) if (fdesc->ip == value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) return (uint64_t)fdesc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) if ((uint64_t) ++fdesc >= mod->arch.opd->sh_addr + mod->arch.opd->sh_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) BUG();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) /* Create new one */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) fdesc->ip = value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) fdesc->gp = mod->arch.gp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) return (uint64_t) fdesc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) static inline int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) do_reloc (struct module *mod, uint8_t r_type, Elf64_Sym *sym, uint64_t addend,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) Elf64_Shdr *sec, void *location)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) enum reloc_target_format format = (r_type >> FORMAT_SHIFT) & FORMAT_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) enum reloc_value_formula formula = (r_type >> VALUE_SHIFT) & VALUE_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) uint64_t val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) int ok = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) val = sym->st_value + addend;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) switch (formula) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) case RV_SEGREL: /* segment base is arbitrarily chosen to be 0 for kernel modules */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) case RV_DIRECT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) case RV_GPREL: val -= mod->arch.gp; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) case RV_LTREL: val = get_ltoff(mod, val, &ok); break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) case RV_PLTREL: val = get_plt(mod, location, val, &ok); break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) case RV_FPTR: val = get_fdesc(mod, val, &ok); break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) case RV_SECREL: val -= sec->sh_addr; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) case RV_LTREL_FPTR: val = get_ltoff(mod, get_fdesc(mod, val, &ok), &ok); break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) case RV_PCREL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) switch (r_type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) case R_IA64_PCREL21B:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) if ((in_init(mod, val) && in_core(mod, (uint64_t)location)) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) (in_core(mod, val) && in_init(mod, (uint64_t)location))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) * Init section may have been allocated far away from core,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) * if the branch won't reach, then allocate a plt for it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) uint64_t delta = ((int64_t)val - (int64_t)location) / 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) if (delta + (1 << 20) >= (1 << 21)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) val = get_fdesc(mod, val, &ok);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) val = get_plt(mod, location, val, &ok);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) } else if (!is_internal(mod, val))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) val = get_plt(mod, location, val, &ok);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) val -= bundle(location);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) case R_IA64_PCREL32MSB:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) case R_IA64_PCREL32LSB:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) case R_IA64_PCREL64MSB:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) case R_IA64_PCREL64LSB:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) val -= (uint64_t) location;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) switch (r_type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) case R_IA64_PCREL60B: format = RF_INSN60; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) case R_IA64_PCREL21B: format = RF_INSN21B; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) case R_IA64_PCREL21M: format = RF_INSN21M; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) case R_IA64_PCREL21F: format = RF_INSN21F; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) default: break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) case RV_BDREL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) val -= (uint64_t) (in_init(mod, val) ? mod->init_layout.base : mod->core_layout.base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) case RV_LTV:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) /* can link-time value relocs happen here? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) BUG();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) case RV_PCREL2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) if (r_type == R_IA64_PCREL21BI) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) if (!is_internal(mod, val)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) printk(KERN_ERR "%s: %s reloc against "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) "non-local symbol (%lx)\n", __func__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) reloc_name[r_type], (unsigned long)val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) return -ENOEXEC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) format = RF_INSN21B;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) val -= bundle(location);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) case RV_SPECIAL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) switch (r_type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) case R_IA64_IPLTMSB:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) case R_IA64_IPLTLSB:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) val = get_fdesc(mod, get_plt(mod, location, val, &ok), &ok);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) format = RF_64LSB;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) if (r_type == R_IA64_IPLTMSB)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) format = RF_64MSB;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) case R_IA64_SUB:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) val = addend - sym->st_value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) format = RF_INSN64;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) case R_IA64_LTOFF22X:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) if (gp_addressable(mod, val))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) val -= mod->arch.gp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) val = get_ltoff(mod, val, &ok);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) format = RF_INSN22;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) case R_IA64_LDXMOV:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) if (gp_addressable(mod, val)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) /* turn "ld8" into "mov": */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) DEBUGP("%s: patching ld8 at %p to mov\n", __func__, location);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) ia64_patch((u64) location, 0x1fff80fe000UL, 0x10000000000UL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) if (reloc_name[r_type])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) printk(KERN_ERR "%s: special reloc %s not supported",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) mod->name, reloc_name[r_type]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) printk(KERN_ERR "%s: unknown special reloc %x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) mod->name, r_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) return -ENOEXEC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) case RV_TPREL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) case RV_LTREL_TPREL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) case RV_DTPMOD:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) case RV_LTREL_DTPMOD:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) case RV_DTPREL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) case RV_LTREL_DTPREL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) printk(KERN_ERR "%s: %s reloc not supported\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) mod->name, reloc_name[r_type] ? reloc_name[r_type] : "?");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) return -ENOEXEC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) printk(KERN_ERR "%s: unknown reloc %x\n", mod->name, r_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) return -ENOEXEC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) if (!ok)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) return -ENOEXEC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) DEBUGP("%s: [%p]<-%016lx = %s(%lx)\n", __func__, location, val,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) reloc_name[r_type] ? reloc_name[r_type] : "?", sym->st_value + addend);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) switch (format) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) case RF_INSN21B: ok = apply_imm21b(mod, location, (int64_t) val / 16); break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) case RF_INSN22: ok = apply_imm22(mod, location, val); break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) case RF_INSN64: ok = apply_imm64(mod, location, val); break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) case RF_INSN60: ok = apply_imm60(mod, location, (int64_t) val / 16); break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) case RF_32LSB: put_unaligned(val, (uint32_t *) location); break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) case RF_64LSB: put_unaligned(val, (uint64_t *) location); break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) case RF_32MSB: /* ia64 Linux is little-endian... */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) case RF_64MSB: /* ia64 Linux is little-endian... */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) case RF_INSN14: /* must be within-module, i.e., resolved by "ld -r" */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) case RF_INSN21M: /* must be within-module, i.e., resolved by "ld -r" */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) case RF_INSN21F: /* must be within-module, i.e., resolved by "ld -r" */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) printk(KERN_ERR "%s: format %u needed by %s reloc is not supported\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) mod->name, format, reloc_name[r_type] ? reloc_name[r_type] : "?");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) return -ENOEXEC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) printk(KERN_ERR "%s: relocation %s resulted in unknown format %u\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) mod->name, reloc_name[r_type] ? reloc_name[r_type] : "?", format);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) return -ENOEXEC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) return ok ? 0 : -ENOEXEC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) apply_relocate_add (Elf64_Shdr *sechdrs, const char *strtab, unsigned int symindex,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) unsigned int relsec, struct module *mod)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) unsigned int i, n = sechdrs[relsec].sh_size / sizeof(Elf64_Rela);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) Elf64_Rela *rela = (void *) sechdrs[relsec].sh_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) Elf64_Shdr *target_sec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) DEBUGP("%s: applying section %u (%u relocs) to %u\n", __func__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) relsec, n, sechdrs[relsec].sh_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) target_sec = sechdrs + sechdrs[relsec].sh_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) if (target_sec->sh_entsize == ~0UL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) * If target section wasn't allocated, we don't need to relocate it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) * Happens, e.g., for debug sections.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) if (!mod->arch.gp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) * XXX Should have an arch-hook for running this after final section
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) * addresses have been selected...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) uint64_t gp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) if (mod->core_layout.size > MAX_LTOFF)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) * This takes advantage of fact that SHF_ARCH_SMALL gets allocated
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) * at the end of the module.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) gp = mod->core_layout.size - MAX_LTOFF / 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) gp = mod->core_layout.size / 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) gp = (uint64_t) mod->core_layout.base + ((gp + 7) & -8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) mod->arch.gp = gp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) DEBUGP("%s: placing gp at 0x%lx\n", __func__, gp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) for (i = 0; i < n; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) ret = do_reloc(mod, ELF64_R_TYPE(rela[i].r_info),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) ((Elf64_Sym *) sechdrs[symindex].sh_addr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) + ELF64_R_SYM(rela[i].r_info)),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) rela[i].r_addend, target_sec,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) (void *) target_sec->sh_addr + rela[i].r_offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) * Modules contain a single unwind table which covers both the core and the init text
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) * sections but since the two are not contiguous, we need to split this table up such that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) * we can register (and unregister) each "segment" separately. Fortunately, this sounds
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) * more complicated than it really is.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) static void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) register_unwind_table (struct module *mod)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) struct unw_table_entry *start = (void *) mod->arch.unwind->sh_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) struct unw_table_entry *end = start + mod->arch.unwind->sh_size / sizeof (*start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) struct unw_table_entry tmp, *e1, *e2, *core, *init;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) unsigned long num_init = 0, num_core = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) /* First, count how many init and core unwind-table entries there are. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) for (e1 = start; e1 < end; ++e1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) if (in_init(mod, e1->start_offset))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) ++num_init;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) ++num_core;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) * Second, sort the table such that all unwind-table entries for the init and core
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) * text sections are nicely separated. We do this with a stupid bubble sort
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) * (unwind tables don't get ridiculously huge).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) for (e1 = start; e1 < end; ++e1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) for (e2 = e1 + 1; e2 < end; ++e2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) if (e2->start_offset < e1->start_offset) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) tmp = *e1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) *e1 = *e2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) *e2 = tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) * Third, locate the init and core segments in the unwind table:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) if (in_init(mod, start->start_offset)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) init = start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) core = start + num_init;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) core = start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) init = start + num_core;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) DEBUGP("%s: name=%s, gp=%lx, num_init=%lu, num_core=%lu\n", __func__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) mod->name, mod->arch.gp, num_init, num_core);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) * Fourth, register both tables (if not empty).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) if (num_core > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) mod->arch.core_unw_table = unw_add_unwind_table(mod->name, 0, mod->arch.gp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) core, core + num_core);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) DEBUGP("%s: core: handle=%p [%p-%p)\n", __func__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) mod->arch.core_unw_table, core, core + num_core);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) if (num_init > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) mod->arch.init_unw_table = unw_add_unwind_table(mod->name, 0, mod->arch.gp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) init, init + num_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) DEBUGP("%s: init: handle=%p [%p-%p)\n", __func__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) mod->arch.init_unw_table, init, init + num_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) module_finalize (const Elf_Ehdr *hdr, const Elf_Shdr *sechdrs, struct module *mod)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) struct mod_arch_specific *mas = &mod->arch;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) DEBUGP("%s: init: entry=%p\n", __func__, mod->init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) if (mas->unwind)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) register_unwind_table(mod);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) * ".opd" was already relocated to the final destination. Store
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) * it's address for use in symbolizer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918) mas->opd_addr = (void *)mas->opd->sh_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) mas->opd_size = mas->opd->sh_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) * Module relocation was already done at this point. Section
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923) * headers are about to be deleted. Wipe out load-time context.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) mas->core_plt = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) mas->init_plt = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) mas->got = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) mas->opd = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) mas->unwind = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) mas->gp = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) mas->next_got_entry = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) module_arch_cleanup (struct module *mod)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) if (mod->arch.init_unw_table) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) unw_remove_unwind_table(mod->arch.init_unw_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) mod->arch.init_unw_table = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) if (mod->arch.core_unw_table) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) unw_remove_unwind_table(mod->arch.core_unw_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) mod->arch.core_unw_table = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) void *dereference_module_function_descriptor(struct module *mod, void *ptr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) struct mod_arch_specific *mas = &mod->arch;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) if (ptr < mas->opd_addr || ptr >= mas->opd_addr + mas->opd_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) return ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) return dereference_function_descriptor(ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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