From 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 21 Feb 2023 18:24:12 -0800 Subject: Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next Pull networking updates from Jakub Kicinski: "Core: - Add dedicated kmem_cache for typical/small skb->head, avoid having to access struct page at kfree time, and improve memory use. - Introduce sysctl to set default RPS configuration for new netdevs. - Define Netlink protocol specification format which can be used to describe messages used by each family and auto-generate parsers. Add tools for generating kernel data structures and uAPI headers. - Expose all net/core sysctls inside netns. - Remove 4s sleep in netpoll if carrier is instantly detected on boot. - Add configurable limit of MDB entries per port, and port-vlan. - Continue populating drop reasons throughout the stack. - Retire a handful of legacy Qdiscs and classifiers. Protocols: - Support IPv4 big TCP (TSO frames larger than 64kB). - Add IP_LOCAL_PORT_RANGE socket option, to control local port range on socket by socket basis. - Track and report in procfs number of MPTCP sockets used. - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path manager. - IPv6: don't check net.ipv6.route.max_size and rely on garbage collection to free memory (similarly to IPv4). - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986). - ICMP: add per-rate limit counters. - Add support for user scanning requests in ieee802154. - Remove static WEP support. - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate reporting. - WiFi 7 EHT channel puncturing support (client & AP). BPF: - Add a rbtree data structure following the "next-gen data structure" precedent set by recently added linked list, that is, by using kfunc + kptr instead of adding a new BPF map type. - Expose XDP hints via kfuncs with initial support for RX hash and timestamp metadata. - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to better support decap on GRE tunnel devices not operating in collect metadata. - Improve x86 JIT's codegen for PROBE_MEM runtime error checks. - Remove the need for trace_printk_lock for bpf_trace_printk and bpf_trace_vprintk helpers. - Extend libbpf's bpf_tracing.h support for tracing arguments of kprobes/uprobes and syscall as a special case. - Significantly reduce the search time for module symbols by livepatch and BPF. - Enable cpumasks to be used as kptrs, which is useful for tracing programs tracking which tasks end up running on which CPUs in different time intervals. - Add support for BPF trampoline on s390x and riscv64. - Add capability to export the XDP features supported by the NIC. - Add __bpf_kfunc tag for marking kernel functions as kfuncs. - Add cgroup.memory=nobpf kernel parameter option to disable BPF memory accounting for container environments. Netfilter: - Remove the CLUSTERIP target. It has been marked as obsolete for years, and we still have WARN splats wrt races of the out-of-band /proc interface installed by this target. - Add 'destroy' commands to nf_tables. They are identical to the existing 'delete' commands, but do not return an error if the referenced object (set, chain, rule...) did not exist. Driver API: - Improve cpumask_local_spread() locality to help NICs set the right IRQ affinity on AMD platforms. - Separate C22 and C45 MDIO bus transactions more clearly. - Introduce new DCB table to control DSCP rewrite on egress. - Support configuration of Physical Layer Collision Avoidance (PLCA) Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of shared medium Ethernet. - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing preemption of low priority frames by high priority frames. - Add support for controlling MACSec offload using netlink SET. - Rework devlink instance refcounts to allow registration and de-registration under the instance lock. Split the code into multiple files, drop some of the unnecessarily granular locks and factor out common parts of netlink operation handling. - Add TX frame aggregation parameters (for USB drivers). - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning messages with notifications for debug. - Allow offloading of UDP NEW connections via act_ct. - Add support for per action HW stats in TC. - Support hardware miss to TC action (continue processing in SW from a specific point in the action chain). - Warn if old Wireless Extension user space interface is used with modern cfg80211/mac80211 drivers. Do not support Wireless Extensions for Wi-Fi 7 devices at all. Everyone should switch to using nl80211 interface instead. - Improve the CAN bit timing configuration. Use extack to return error messages directly to user space, update the SJW handling, including the definition of a new default value that will benefit CAN-FD controllers, by increasing their oscillator tolerance. New hardware / drivers: - Ethernet: - nVidia BlueField-3 support (control traffic driver) - Ethernet support for imx93 SoCs - Motorcomm yt8531 gigabit Ethernet PHY - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA) - Microchip LAN8841 PHY (incl. cable diagnostics and PTP) - Amlogic gxl MDIO mux - WiFi: - RealTek RTL8188EU (rtl8xxxu) - Qualcomm Wi-Fi 7 devices (ath12k) - CAN: - Renesas R-Car V4H Drivers: - Bluetooth: - Set Per Platform Antenna Gain (PPAG) for Intel controllers. - Ethernet NICs: - Intel (1G, igc): - support TSN / Qbv / packet scheduling features of i226 model - Intel (100G, ice): - use GNSS subsystem instead of TTY - multi-buffer XDP support - extend support for GPIO pins to E823 devices - nVidia/Mellanox: - update the shared buffer configuration on PFC commands - implement PTP adjphase function for HW offset control - TC support for Geneve and GRE with VF tunnel offload - more efficient crypto key management method - multi-port eswitch support - Netronome/Corigine: - add DCB IEEE support - support IPsec offloading for NFP3800 - Freescale/NXP (enetc): - support XDP_REDIRECT for XDP non-linear buffers - improve reconfig, avoid link flap and waiting for idle - support MAC Merge layer - Other NICs: - sfc/ef100: add basic devlink support for ef100 - ionic: rx_push mode operation (writing descriptors via MMIO) - bnxt: use the auxiliary bus abstraction for RDMA - r8169: disable ASPM and reset bus in case of tx timeout - cpsw: support QSGMII mode for J721e CPSW9G - cpts: support pulse-per-second output - ngbe: add an mdio bus driver - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing - r8152: handle devices with FW with NCM support - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation - virtio-net: support multi buffer XDP - virtio/vsock: replace virtio_vsock_pkt with sk_buff - tsnep: XDP support - Ethernet high-speed switches: - nVidia/Mellanox (mlxsw): - add support for latency TLV (in FW control messages) - Microchip (sparx5): - separate explicit and implicit traffic forwarding rules, make the implicit rules always active - add support for egress DSCP rewrite - IS0 VCAP support (Ingress Classification) - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS etc.) - ES2 VCAP support (Egress Access Control) - support for Per-Stream Filtering and Policing (802.1Q, 8.6.5.1) - Ethernet embedded switches: - Marvell (mv88e6xxx): - add MAB (port auth) offload support - enable PTP receive for mv88e6390 - NXP (ocelot): - support MAC Merge layer - support for the the vsc7512 internal copper phys - Microchip: - lan9303: convert to PHYLINK - lan966x: support TC flower filter statistics - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x - lan937x: support Credit Based Shaper configuration - ksz9477: support Energy Efficient Ethernet - other: - qca8k: convert to regmap read/write API, use bulk operations - rswitch: Improve TX timestamp accuracy - Intel WiFi (iwlwifi): - EHT (Wi-Fi 7) rate reporting - STEP equalizer support: transfer some STEP (connection to radio on platforms with integrated wifi) related parameters from the BIOS to the firmware. - Qualcomm 802.11ax WiFi (ath11k): - IPQ5018 support - Fine Timing Measurement (FTM) responder role support - channel 177 support - MediaTek WiFi (mt76): - per-PHY LED support - mt7996: EHT (Wi-Fi 7) support - Wireless Ethernet Dispatch (WED) reset support - switch to using page pool allocator - RealTek WiFi (rtw89): - support new version of Bluetooth co-existance - Mobile: - rmnet: support TX aggregation" * tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits) page_pool: add a comment explaining the fragment counter usage net: ethtool: fix __ethtool_dev_mm_supported() implementation ethtool: pse-pd: Fix double word in comments xsk: add linux/vmalloc.h to xsk.c sefltests: netdevsim: wait for devlink instance after netns removal selftest: fib_tests: Always cleanup before exit net/mlx5e: Align IPsec ASO result memory to be as required by hardware net/mlx5e: TC, Set CT miss to the specific ct action instance net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG net/mlx5: Refactor tc miss handling to a single function net/mlx5: Kconfig: Make tc offload depend on tc skb extension net/sched: flower: Support hardware miss to tc action net/sched: flower: Move filter handle initialization earlier net/sched: cls_api: Support hardware miss to tc action net/sched: Rename user cookie and act cookie sfc: fix builds without CONFIG_RTC_LIB sfc: clean up some inconsistent indentings net/mlx4_en: Introduce flexible array to silence overflow warning net: lan966x: Fix possible deadlock inside PTP net/ulp: Remove redundant ->clone() test in inet_clone_ulp(). ... --- arch/loongarch/kernel/module.c | 509 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 509 insertions(+) create mode 100644 arch/loongarch/kernel/module.c (limited to 'arch/loongarch/kernel/module.c') diff --git a/arch/loongarch/kernel/module.c b/arch/loongarch/kernel/module.c new file mode 100644 index 000000000..b8b86088b --- /dev/null +++ b/arch/loongarch/kernel/module.c @@ -0,0 +1,509 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Author: Hanlu Li + * Huacai Chen + * + * Copyright (C) 2020-2022 Loongson Technology Corporation Limited + */ + +#define pr_fmt(fmt) "kmod: " fmt + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +static int rela_stack_push(s64 stack_value, s64 *rela_stack, size_t *rela_stack_top) +{ + if (*rela_stack_top >= RELA_STACK_DEPTH) + return -ENOEXEC; + + rela_stack[(*rela_stack_top)++] = stack_value; + pr_debug("%s stack_value = 0x%llx\n", __func__, stack_value); + + return 0; +} + +static int rela_stack_pop(s64 *stack_value, s64 *rela_stack, size_t *rela_stack_top) +{ + if (*rela_stack_top == 0) + return -ENOEXEC; + + *stack_value = rela_stack[--(*rela_stack_top)]; + pr_debug("%s stack_value = 0x%llx\n", __func__, *stack_value); + + return 0; +} + +static int apply_r_larch_none(struct module *mod, u32 *location, Elf_Addr v, + s64 *rela_stack, size_t *rela_stack_top, unsigned int type) +{ + return 0; +} + +static int apply_r_larch_error(struct module *me, u32 *location, Elf_Addr v, + s64 *rela_stack, size_t *rela_stack_top, unsigned int type) +{ + pr_err("%s: Unsupport relocation type %u, please add its support.\n", me->name, type); + return -EINVAL; +} + +static int apply_r_larch_32(struct module *mod, u32 *location, Elf_Addr v, + s64 *rela_stack, size_t *rela_stack_top, unsigned int type) +{ + *location = v; + return 0; +} + +static int apply_r_larch_64(struct module *mod, u32 *location, Elf_Addr v, + s64 *rela_stack, size_t *rela_stack_top, unsigned int type) +{ + *(Elf_Addr *)location = v; + return 0; +} + +static int apply_r_larch_sop_push_pcrel(struct module *mod, u32 *location, Elf_Addr v, + s64 *rela_stack, size_t *rela_stack_top, unsigned int type) +{ + return rela_stack_push(v - (u64)location, rela_stack, rela_stack_top); +} + +static int apply_r_larch_sop_push_absolute(struct module *mod, u32 *location, Elf_Addr v, + s64 *rela_stack, size_t *rela_stack_top, unsigned int type) +{ + return rela_stack_push(v, rela_stack, rela_stack_top); +} + +static int apply_r_larch_sop_push_dup(struct module *mod, u32 *location, Elf_Addr v, + s64 *rela_stack, size_t *rela_stack_top, unsigned int type) +{ + int err = 0; + s64 opr1; + + err = rela_stack_pop(&opr1, rela_stack, rela_stack_top); + if (err) + return err; + err = rela_stack_push(opr1, rela_stack, rela_stack_top); + if (err) + return err; + err = rela_stack_push(opr1, rela_stack, rela_stack_top); + if (err) + return err; + + return 0; +} + +static int apply_r_larch_sop_push_plt_pcrel(struct module *mod, + Elf_Shdr *sechdrs, u32 *location, Elf_Addr v, + s64 *rela_stack, size_t *rela_stack_top, unsigned int type) +{ + ptrdiff_t offset = (void *)v - (void *)location; + + if (offset >= SZ_128M) + v = module_emit_plt_entry(mod, sechdrs, v); + + if (offset < -SZ_128M) + v = module_emit_plt_entry(mod, sechdrs, v); + + return apply_r_larch_sop_push_pcrel(mod, location, v, rela_stack, rela_stack_top, type); +} + +static int apply_r_larch_sop(struct module *mod, u32 *location, Elf_Addr v, + s64 *rela_stack, size_t *rela_stack_top, unsigned int type) +{ + int err = 0; + s64 opr1, opr2, opr3; + + if (type == R_LARCH_SOP_IF_ELSE) { + err = rela_stack_pop(&opr3, rela_stack, rela_stack_top); + if (err) + return err; + } + + err = rela_stack_pop(&opr2, rela_stack, rela_stack_top); + if (err) + return err; + err = rela_stack_pop(&opr1, rela_stack, rela_stack_top); + if (err) + return err; + + switch (type) { + case R_LARCH_SOP_AND: + err = rela_stack_push(opr1 & opr2, rela_stack, rela_stack_top); + break; + case R_LARCH_SOP_ADD: + err = rela_stack_push(opr1 + opr2, rela_stack, rela_stack_top); + break; + case R_LARCH_SOP_SUB: + err = rela_stack_push(opr1 - opr2, rela_stack, rela_stack_top); + break; + case R_LARCH_SOP_SL: + err = rela_stack_push(opr1 << opr2, rela_stack, rela_stack_top); + break; + case R_LARCH_SOP_SR: + err = rela_stack_push(opr1 >> opr2, rela_stack, rela_stack_top); + break; + case R_LARCH_SOP_IF_ELSE: + err = rela_stack_push(opr1 ? opr2 : opr3, rela_stack, rela_stack_top); + break; + default: + pr_err("%s: Unsupport relocation type %u\n", mod->name, type); + return -EINVAL; + } + + return err; +} + +static int apply_r_larch_sop_imm_field(struct module *mod, u32 *location, Elf_Addr v, + s64 *rela_stack, size_t *rela_stack_top, unsigned int type) +{ + int err = 0; + s64 opr1; + union loongarch_instruction *insn = (union loongarch_instruction *)location; + + err = rela_stack_pop(&opr1, rela_stack, rela_stack_top); + if (err) + return err; + + switch (type) { + case R_LARCH_SOP_POP_32_U_10_12: + if (!unsigned_imm_check(opr1, 12)) + goto overflow; + + /* (*(uint32_t *) PC) [21 ... 10] = opr [11 ... 0] */ + insn->reg2i12_format.immediate = opr1 & 0xfff; + return 0; + case R_LARCH_SOP_POP_32_S_10_12: + if (!signed_imm_check(opr1, 12)) + goto overflow; + + insn->reg2i12_format.immediate = opr1 & 0xfff; + return 0; + case R_LARCH_SOP_POP_32_S_10_16: + if (!signed_imm_check(opr1, 16)) + goto overflow; + + insn->reg2i16_format.immediate = opr1 & 0xffff; + return 0; + case R_LARCH_SOP_POP_32_S_10_16_S2: + if (opr1 % 4) + goto unaligned; + + if (!signed_imm_check(opr1, 18)) + goto overflow; + + insn->reg2i16_format.immediate = (opr1 >> 2) & 0xffff; + return 0; + case R_LARCH_SOP_POP_32_S_5_20: + if (!signed_imm_check(opr1, 20)) + goto overflow; + + insn->reg1i20_format.immediate = (opr1) & 0xfffff; + return 0; + case R_LARCH_SOP_POP_32_S_0_5_10_16_S2: + if (opr1 % 4) + goto unaligned; + + if (!signed_imm_check(opr1, 23)) + goto overflow; + + opr1 >>= 2; + insn->reg1i21_format.immediate_l = opr1 & 0xffff; + insn->reg1i21_format.immediate_h = (opr1 >> 16) & 0x1f; + return 0; + case R_LARCH_SOP_POP_32_S_0_10_10_16_S2: + if (opr1 % 4) + goto unaligned; + + if (!signed_imm_check(opr1, 28)) + goto overflow; + + opr1 >>= 2; + insn->reg0i26_format.immediate_l = opr1 & 0xffff; + insn->reg0i26_format.immediate_h = (opr1 >> 16) & 0x3ff; + return 0; + case R_LARCH_SOP_POP_32_U: + if (!unsigned_imm_check(opr1, 32)) + goto overflow; + + /* (*(uint32_t *) PC) = opr */ + *location = (u32)opr1; + return 0; + default: + pr_err("%s: Unsupport relocation type %u\n", mod->name, type); + return -EINVAL; + } + +overflow: + pr_err("module %s: opr1 = 0x%llx overflow! dangerous %s (%u) relocation\n", + mod->name, opr1, __func__, type); + return -ENOEXEC; + +unaligned: + pr_err("module %s: opr1 = 0x%llx unaligned! dangerous %s (%u) relocation\n", + mod->name, opr1, __func__, type); + return -ENOEXEC; +} + +static int apply_r_larch_add_sub(struct module *mod, u32 *location, Elf_Addr v, + s64 *rela_stack, size_t *rela_stack_top, unsigned int type) +{ + switch (type) { + case R_LARCH_ADD32: + *(s32 *)location += v; + return 0; + case R_LARCH_ADD64: + *(s64 *)location += v; + return 0; + case R_LARCH_SUB32: + *(s32 *)location -= v; + return 0; + case R_LARCH_SUB64: + *(s64 *)location -= v; + return 0; + default: + pr_err("%s: Unsupport relocation type %u\n", mod->name, type); + return -EINVAL; + } +} + +static int apply_r_larch_b26(struct module *mod, + Elf_Shdr *sechdrs, u32 *location, Elf_Addr v, + s64 *rela_stack, size_t *rela_stack_top, unsigned int type) +{ + ptrdiff_t offset = (void *)v - (void *)location; + union loongarch_instruction *insn = (union loongarch_instruction *)location; + + if (offset >= SZ_128M) + v = module_emit_plt_entry(mod, sechdrs, v); + + if (offset < -SZ_128M) + v = module_emit_plt_entry(mod, sechdrs, v); + + offset = (void *)v - (void *)location; + + if (offset & 3) { + pr_err("module %s: jump offset = 0x%llx unaligned! dangerous R_LARCH_B26 (%u) relocation\n", + mod->name, (long long)offset, type); + return -ENOEXEC; + } + + if (!signed_imm_check(offset, 28)) { + pr_err("module %s: jump offset = 0x%llx overflow! dangerous R_LARCH_B26 (%u) relocation\n", + mod->name, (long long)offset, type); + return -ENOEXEC; + } + + offset >>= 2; + insn->reg0i26_format.immediate_l = offset & 0xffff; + insn->reg0i26_format.immediate_h = (offset >> 16) & 0x3ff; + + return 0; +} + +static int apply_r_larch_pcala(struct module *mod, u32 *location, Elf_Addr v, + s64 *rela_stack, size_t *rela_stack_top, unsigned int type) +{ + union loongarch_instruction *insn = (union loongarch_instruction *)location; + /* Use s32 for a sign-extension deliberately. */ + s32 offset_hi20 = (void *)((v + 0x800) & ~0xfff) - + (void *)((Elf_Addr)location & ~0xfff); + Elf_Addr anchor = (((Elf_Addr)location) & ~0xfff) + offset_hi20; + ptrdiff_t offset_rem = (void *)v - (void *)anchor; + + switch (type) { + case R_LARCH_PCALA_LO12: + insn->reg2i12_format.immediate = v & 0xfff; + break; + case R_LARCH_PCALA_HI20: + v = offset_hi20 >> 12; + insn->reg1i20_format.immediate = v & 0xfffff; + break; + case R_LARCH_PCALA64_LO20: + v = offset_rem >> 32; + insn->reg1i20_format.immediate = v & 0xfffff; + break; + case R_LARCH_PCALA64_HI12: + v = offset_rem >> 52; + insn->reg2i12_format.immediate = v & 0xfff; + break; + default: + pr_err("%s: Unsupport relocation type %u\n", mod->name, type); + return -EINVAL; + } + + return 0; +} + +static int apply_r_larch_got_pc(struct module *mod, + Elf_Shdr *sechdrs, u32 *location, Elf_Addr v, + s64 *rela_stack, size_t *rela_stack_top, unsigned int type) +{ + Elf_Addr got = module_emit_got_entry(mod, sechdrs, v); + + if (!got) + return -EINVAL; + + switch (type) { + case R_LARCH_GOT_PC_LO12: + type = R_LARCH_PCALA_LO12; + break; + case R_LARCH_GOT_PC_HI20: + type = R_LARCH_PCALA_HI20; + break; + default: + pr_err("%s: Unsupport relocation type %u\n", mod->name, type); + return -EINVAL; + } + + return apply_r_larch_pcala(mod, location, got, rela_stack, rela_stack_top, type); +} + +/* + * reloc_handlers_rela() - Apply a particular relocation to a module + * @mod: the module to apply the reloc to + * @location: the address at which the reloc is to be applied + * @v: the value of the reloc, with addend for RELA-style + * @rela_stack: the stack used for store relocation info, LOCAL to THIS module + * @rela_stac_top: where the stack operation(pop/push) applies to + * + * Return: 0 upon success, else -ERRNO + */ +typedef int (*reloc_rela_handler)(struct module *mod, u32 *location, Elf_Addr v, + s64 *rela_stack, size_t *rela_stack_top, unsigned int type); + +/* The handlers for known reloc types */ +static reloc_rela_handler reloc_rela_handlers[] = { + [R_LARCH_NONE ... R_LARCH_RELAX] = apply_r_larch_error, + + [R_LARCH_NONE] = apply_r_larch_none, + [R_LARCH_32] = apply_r_larch_32, + [R_LARCH_64] = apply_r_larch_64, + [R_LARCH_MARK_LA] = apply_r_larch_none, + [R_LARCH_MARK_PCREL] = apply_r_larch_none, + [R_LARCH_SOP_PUSH_PCREL] = apply_r_larch_sop_push_pcrel, + [R_LARCH_SOP_PUSH_ABSOLUTE] = apply_r_larch_sop_push_absolute, + [R_LARCH_SOP_PUSH_DUP] = apply_r_larch_sop_push_dup, + [R_LARCH_SOP_SUB ... R_LARCH_SOP_IF_ELSE] = apply_r_larch_sop, + [R_LARCH_SOP_POP_32_S_10_5 ... R_LARCH_SOP_POP_32_U] = apply_r_larch_sop_imm_field, + [R_LARCH_ADD32 ... R_LARCH_SUB64] = apply_r_larch_add_sub, + [R_LARCH_PCALA_HI20...R_LARCH_PCALA64_HI12] = apply_r_larch_pcala, +}; + +int apply_relocate_add(Elf_Shdr *sechdrs, const char *strtab, + unsigned int symindex, unsigned int relsec, + struct module *mod) +{ + int i, err; + unsigned int type; + s64 rela_stack[RELA_STACK_DEPTH]; + size_t rela_stack_top = 0; + reloc_rela_handler handler; + void *location; + Elf_Addr v; + Elf_Sym *sym; + Elf_Rela *rel = (void *) sechdrs[relsec].sh_addr; + + pr_debug("%s: Applying relocate section %u to %u\n", __func__, relsec, + sechdrs[relsec].sh_info); + + rela_stack_top = 0; + 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; + /* This is the symbol it is referring to */ + sym = (Elf_Sym *)sechdrs[symindex].sh_addr + ELF_R_SYM(rel[i].r_info); + if (IS_ERR_VALUE(sym->st_value)) { + /* Ignore unresolved weak symbol */ + if (ELF_ST_BIND(sym->st_info) == STB_WEAK) + continue; + pr_warn("%s: Unknown symbol %s\n", mod->name, strtab + sym->st_name); + return -ENOENT; + } + + type = ELF_R_TYPE(rel[i].r_info); + + if (type < ARRAY_SIZE(reloc_rela_handlers)) + handler = reloc_rela_handlers[type]; + else + handler = NULL; + + if (!handler) { + pr_err("%s: Unknown relocation type %u\n", mod->name, type); + return -EINVAL; + } + + pr_debug("type %d st_value %llx r_addend %llx loc %llx\n", + (int)ELF_R_TYPE(rel[i].r_info), + sym->st_value, rel[i].r_addend, (u64)location); + + v = sym->st_value + rel[i].r_addend; + switch (type) { + case R_LARCH_B26: + err = apply_r_larch_b26(mod, sechdrs, location, + v, rela_stack, &rela_stack_top, type); + break; + case R_LARCH_GOT_PC_HI20...R_LARCH_GOT_PC_LO12: + err = apply_r_larch_got_pc(mod, sechdrs, location, + v, rela_stack, &rela_stack_top, type); + break; + case R_LARCH_SOP_PUSH_PLT_PCREL: + err = apply_r_larch_sop_push_plt_pcrel(mod, sechdrs, location, + v, rela_stack, &rela_stack_top, type); + break; + default: + err = handler(mod, location, v, rela_stack, &rela_stack_top, type); + } + if (err) + return err; + } + + return 0; +} + +void *module_alloc(unsigned long size) +{ + return __vmalloc_node_range(size, 1, MODULES_VADDR, MODULES_END, + GFP_KERNEL, PAGE_KERNEL, 0, NUMA_NO_NODE, __builtin_return_address(0)); +} + +static void module_init_ftrace_plt(const Elf_Ehdr *hdr, + const Elf_Shdr *sechdrs, struct module *mod) +{ +#ifdef CONFIG_DYNAMIC_FTRACE + struct plt_entry *ftrace_plts; + + ftrace_plts = (void *)sechdrs->sh_addr; + + ftrace_plts[FTRACE_PLT_IDX] = emit_plt_entry(FTRACE_ADDR); + + if (IS_ENABLED(CONFIG_DYNAMIC_FTRACE_WITH_REGS)) + ftrace_plts[FTRACE_REGS_PLT_IDX] = emit_plt_entry(FTRACE_REGS_ADDR); + + mod->arch.ftrace_trampolines = ftrace_plts; +#endif +} + +int module_finalize(const Elf_Ehdr *hdr, + const Elf_Shdr *sechdrs, struct module *mod) +{ + const Elf_Shdr *s, *se; + const char *secstrs = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset; + + for (s = sechdrs, se = sechdrs + hdr->e_shnum; s < se; s++) { + if (!strcmp(".altinstructions", secstrs + s->sh_name)) + apply_alternatives((void *)s->sh_addr, (void *)s->sh_addr + s->sh_size); + if (!strcmp(".ftrace_trampoline", secstrs + s->sh_name)) + module_init_ftrace_plt(hdr, s, mod); + } + + return 0; +} -- cgit v1.2.3