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/ia64/kernel/unwind_decoder.c | 460 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 460 insertions(+) create mode 100644 arch/ia64/kernel/unwind_decoder.c (limited to 'arch/ia64/kernel/unwind_decoder.c') diff --git a/arch/ia64/kernel/unwind_decoder.c b/arch/ia64/kernel/unwind_decoder.c new file mode 100644 index 000000000..83f54f792 --- /dev/null +++ b/arch/ia64/kernel/unwind_decoder.c @@ -0,0 +1,460 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2000 Hewlett-Packard Co + * Copyright (C) 2000 David Mosberger-Tang + * + * Generic IA-64 unwind info decoder. + * + * This file is used both by the Linux kernel and objdump. Please keep + * the two copies of this file in sync. + * + * You need to customize the decoder by defining the following + * macros/constants before including this file: + * + * Types: + * unw_word Unsigned integer type with at least 64 bits + * + * Register names: + * UNW_REG_BSP + * UNW_REG_BSPSTORE + * UNW_REG_FPSR + * UNW_REG_LC + * UNW_REG_PFS + * UNW_REG_PR + * UNW_REG_RNAT + * UNW_REG_PSP + * UNW_REG_RP + * UNW_REG_UNAT + * + * Decoder action macros: + * UNW_DEC_BAD_CODE(code) + * UNW_DEC_ABI(fmt,abi,context,arg) + * UNW_DEC_BR_GR(fmt,brmask,gr,arg) + * UNW_DEC_BR_MEM(fmt,brmask,arg) + * UNW_DEC_COPY_STATE(fmt,label,arg) + * UNW_DEC_EPILOGUE(fmt,t,ecount,arg) + * UNW_DEC_FRGR_MEM(fmt,grmask,frmask,arg) + * UNW_DEC_FR_MEM(fmt,frmask,arg) + * UNW_DEC_GR_GR(fmt,grmask,gr,arg) + * UNW_DEC_GR_MEM(fmt,grmask,arg) + * UNW_DEC_LABEL_STATE(fmt,label,arg) + * UNW_DEC_MEM_STACK_F(fmt,t,size,arg) + * UNW_DEC_MEM_STACK_V(fmt,t,arg) + * UNW_DEC_PRIUNAT_GR(fmt,r,arg) + * UNW_DEC_PRIUNAT_WHEN_GR(fmt,t,arg) + * UNW_DEC_PRIUNAT_WHEN_MEM(fmt,t,arg) + * UNW_DEC_PRIUNAT_WHEN_PSPREL(fmt,pspoff,arg) + * UNW_DEC_PRIUNAT_WHEN_SPREL(fmt,spoff,arg) + * UNW_DEC_PROLOGUE(fmt,body,rlen,arg) + * UNW_DEC_PROLOGUE_GR(fmt,rlen,mask,grsave,arg) + * UNW_DEC_REG_PSPREL(fmt,reg,pspoff,arg) + * UNW_DEC_REG_REG(fmt,src,dst,arg) + * UNW_DEC_REG_SPREL(fmt,reg,spoff,arg) + * UNW_DEC_REG_WHEN(fmt,reg,t,arg) + * UNW_DEC_RESTORE(fmt,t,abreg,arg) + * UNW_DEC_RESTORE_P(fmt,qp,t,abreg,arg) + * UNW_DEC_SPILL_BASE(fmt,pspoff,arg) + * UNW_DEC_SPILL_MASK(fmt,imaskp,arg) + * UNW_DEC_SPILL_PSPREL(fmt,t,abreg,pspoff,arg) + * UNW_DEC_SPILL_PSPREL_P(fmt,qp,t,abreg,pspoff,arg) + * UNW_DEC_SPILL_REG(fmt,t,abreg,x,ytreg,arg) + * UNW_DEC_SPILL_REG_P(fmt,qp,t,abreg,x,ytreg,arg) + * UNW_DEC_SPILL_SPREL(fmt,t,abreg,spoff,arg) + * UNW_DEC_SPILL_SPREL_P(fmt,qp,t,abreg,pspoff,arg) + */ + +static unw_word +unw_decode_uleb128 (unsigned char **dpp) +{ + unsigned shift = 0; + unw_word byte, result = 0; + unsigned char *bp = *dpp; + + while (1) + { + byte = *bp++; + result |= (byte & 0x7f) << shift; + if ((byte & 0x80) == 0) + break; + shift += 7; + } + *dpp = bp; + return result; +} + +static unsigned char * +unw_decode_x1 (unsigned char *dp, unsigned char code, void *arg) +{ + unsigned char byte1, abreg; + unw_word t, off; + + byte1 = *dp++; + t = unw_decode_uleb128 (&dp); + off = unw_decode_uleb128 (&dp); + abreg = (byte1 & 0x7f); + if (byte1 & 0x80) + UNW_DEC_SPILL_SPREL(X1, t, abreg, off, arg); + else + UNW_DEC_SPILL_PSPREL(X1, t, abreg, off, arg); + return dp; +} + +static unsigned char * +unw_decode_x2 (unsigned char *dp, unsigned char code, void *arg) +{ + unsigned char byte1, byte2, abreg, x, ytreg; + unw_word t; + + byte1 = *dp++; byte2 = *dp++; + t = unw_decode_uleb128 (&dp); + abreg = (byte1 & 0x7f); + ytreg = byte2; + x = (byte1 >> 7) & 1; + if ((byte1 & 0x80) == 0 && ytreg == 0) + UNW_DEC_RESTORE(X2, t, abreg, arg); + else + UNW_DEC_SPILL_REG(X2, t, abreg, x, ytreg, arg); + return dp; +} + +static unsigned char * +unw_decode_x3 (unsigned char *dp, unsigned char code, void *arg) +{ + unsigned char byte1, byte2, abreg, qp; + unw_word t, off; + + byte1 = *dp++; byte2 = *dp++; + t = unw_decode_uleb128 (&dp); + off = unw_decode_uleb128 (&dp); + + qp = (byte1 & 0x3f); + abreg = (byte2 & 0x7f); + + if (byte1 & 0x80) + UNW_DEC_SPILL_SPREL_P(X3, qp, t, abreg, off, arg); + else + UNW_DEC_SPILL_PSPREL_P(X3, qp, t, abreg, off, arg); + return dp; +} + +static unsigned char * +unw_decode_x4 (unsigned char *dp, unsigned char code, void *arg) +{ + unsigned char byte1, byte2, byte3, qp, abreg, x, ytreg; + unw_word t; + + byte1 = *dp++; byte2 = *dp++; byte3 = *dp++; + t = unw_decode_uleb128 (&dp); + + qp = (byte1 & 0x3f); + abreg = (byte2 & 0x7f); + x = (byte2 >> 7) & 1; + ytreg = byte3; + + if ((byte2 & 0x80) == 0 && byte3 == 0) + UNW_DEC_RESTORE_P(X4, qp, t, abreg, arg); + else + UNW_DEC_SPILL_REG_P(X4, qp, t, abreg, x, ytreg, arg); + return dp; +} + +static unsigned char * +unw_decode_r1 (unsigned char *dp, unsigned char code, void *arg) +{ + int body = (code & 0x20) != 0; + unw_word rlen; + + rlen = (code & 0x1f); + UNW_DEC_PROLOGUE(R1, body, rlen, arg); + return dp; +} + +static unsigned char * +unw_decode_r2 (unsigned char *dp, unsigned char code, void *arg) +{ + unsigned char byte1, mask, grsave; + unw_word rlen; + + byte1 = *dp++; + + mask = ((code & 0x7) << 1) | ((byte1 >> 7) & 1); + grsave = (byte1 & 0x7f); + rlen = unw_decode_uleb128 (&dp); + UNW_DEC_PROLOGUE_GR(R2, rlen, mask, grsave, arg); + return dp; +} + +static unsigned char * +unw_decode_r3 (unsigned char *dp, unsigned char code, void *arg) +{ + unw_word rlen; + + rlen = unw_decode_uleb128 (&dp); + UNW_DEC_PROLOGUE(R3, ((code & 0x3) == 1), rlen, arg); + return dp; +} + +static unsigned char * +unw_decode_p1 (unsigned char *dp, unsigned char code, void *arg) +{ + unsigned char brmask = (code & 0x1f); + + UNW_DEC_BR_MEM(P1, brmask, arg); + return dp; +} + +static unsigned char * +unw_decode_p2_p5 (unsigned char *dp, unsigned char code, void *arg) +{ + if ((code & 0x10) == 0) + { + unsigned char byte1 = *dp++; + + UNW_DEC_BR_GR(P2, ((code & 0xf) << 1) | ((byte1 >> 7) & 1), + (byte1 & 0x7f), arg); + } + else if ((code & 0x08) == 0) + { + unsigned char byte1 = *dp++, r, dst; + + r = ((code & 0x7) << 1) | ((byte1 >> 7) & 1); + dst = (byte1 & 0x7f); + switch (r) + { + case 0: UNW_DEC_REG_GR(P3, UNW_REG_PSP, dst, arg); break; + case 1: UNW_DEC_REG_GR(P3, UNW_REG_RP, dst, arg); break; + case 2: UNW_DEC_REG_GR(P3, UNW_REG_PFS, dst, arg); break; + case 3: UNW_DEC_REG_GR(P3, UNW_REG_PR, dst, arg); break; + case 4: UNW_DEC_REG_GR(P3, UNW_REG_UNAT, dst, arg); break; + case 5: UNW_DEC_REG_GR(P3, UNW_REG_LC, dst, arg); break; + case 6: UNW_DEC_RP_BR(P3, dst, arg); break; + case 7: UNW_DEC_REG_GR(P3, UNW_REG_RNAT, dst, arg); break; + case 8: UNW_DEC_REG_GR(P3, UNW_REG_BSP, dst, arg); break; + case 9: UNW_DEC_REG_GR(P3, UNW_REG_BSPSTORE, dst, arg); break; + case 10: UNW_DEC_REG_GR(P3, UNW_REG_FPSR, dst, arg); break; + case 11: UNW_DEC_PRIUNAT_GR(P3, dst, arg); break; + default: UNW_DEC_BAD_CODE(r); break; + } + } + else if ((code & 0x7) == 0) + UNW_DEC_SPILL_MASK(P4, dp, arg); + else if ((code & 0x7) == 1) + { + unw_word grmask, frmask, byte1, byte2, byte3; + + byte1 = *dp++; byte2 = *dp++; byte3 = *dp++; + grmask = ((byte1 >> 4) & 0xf); + frmask = ((byte1 & 0xf) << 16) | (byte2 << 8) | byte3; + UNW_DEC_FRGR_MEM(P5, grmask, frmask, arg); + } + else + UNW_DEC_BAD_CODE(code); + return dp; +} + +static unsigned char * +unw_decode_p6 (unsigned char *dp, unsigned char code, void *arg) +{ + int gregs = (code & 0x10) != 0; + unsigned char mask = (code & 0x0f); + + if (gregs) + UNW_DEC_GR_MEM(P6, mask, arg); + else + UNW_DEC_FR_MEM(P6, mask, arg); + return dp; +} + +static unsigned char * +unw_decode_p7_p10 (unsigned char *dp, unsigned char code, void *arg) +{ + unsigned char r, byte1, byte2; + unw_word t, size; + + if ((code & 0x10) == 0) + { + r = (code & 0xf); + t = unw_decode_uleb128 (&dp); + switch (r) + { + case 0: + size = unw_decode_uleb128 (&dp); + UNW_DEC_MEM_STACK_F(P7, t, size, arg); + break; + + case 1: UNW_DEC_MEM_STACK_V(P7, t, arg); break; + case 2: UNW_DEC_SPILL_BASE(P7, t, arg); break; + case 3: UNW_DEC_REG_SPREL(P7, UNW_REG_PSP, t, arg); break; + case 4: UNW_DEC_REG_WHEN(P7, UNW_REG_RP, t, arg); break; + case 5: UNW_DEC_REG_PSPREL(P7, UNW_REG_RP, t, arg); break; + case 6: UNW_DEC_REG_WHEN(P7, UNW_REG_PFS, t, arg); break; + case 7: UNW_DEC_REG_PSPREL(P7, UNW_REG_PFS, t, arg); break; + case 8: UNW_DEC_REG_WHEN(P7, UNW_REG_PR, t, arg); break; + case 9: UNW_DEC_REG_PSPREL(P7, UNW_REG_PR, t, arg); break; + case 10: UNW_DEC_REG_WHEN(P7, UNW_REG_LC, t, arg); break; + case 11: UNW_DEC_REG_PSPREL(P7, UNW_REG_LC, t, arg); break; + case 12: UNW_DEC_REG_WHEN(P7, UNW_REG_UNAT, t, arg); break; + case 13: UNW_DEC_REG_PSPREL(P7, UNW_REG_UNAT, t, arg); break; + case 14: UNW_DEC_REG_WHEN(P7, UNW_REG_FPSR, t, arg); break; + case 15: UNW_DEC_REG_PSPREL(P7, UNW_REG_FPSR, t, arg); break; + default: UNW_DEC_BAD_CODE(r); break; + } + } + else + { + switch (code & 0xf) + { + case 0x0: /* p8 */ + { + r = *dp++; + t = unw_decode_uleb128 (&dp); + switch (r) + { + case 1: UNW_DEC_REG_SPREL(P8, UNW_REG_RP, t, arg); break; + case 2: UNW_DEC_REG_SPREL(P8, UNW_REG_PFS, t, arg); break; + case 3: UNW_DEC_REG_SPREL(P8, UNW_REG_PR, t, arg); break; + case 4: UNW_DEC_REG_SPREL(P8, UNW_REG_LC, t, arg); break; + case 5: UNW_DEC_REG_SPREL(P8, UNW_REG_UNAT, t, arg); break; + case 6: UNW_DEC_REG_SPREL(P8, UNW_REG_FPSR, t, arg); break; + case 7: UNW_DEC_REG_WHEN(P8, UNW_REG_BSP, t, arg); break; + case 8: UNW_DEC_REG_PSPREL(P8, UNW_REG_BSP, t, arg); break; + case 9: UNW_DEC_REG_SPREL(P8, UNW_REG_BSP, t, arg); break; + case 10: UNW_DEC_REG_WHEN(P8, UNW_REG_BSPSTORE, t, arg); break; + case 11: UNW_DEC_REG_PSPREL(P8, UNW_REG_BSPSTORE, t, arg); break; + case 12: UNW_DEC_REG_SPREL(P8, UNW_REG_BSPSTORE, t, arg); break; + case 13: UNW_DEC_REG_WHEN(P8, UNW_REG_RNAT, t, arg); break; + case 14: UNW_DEC_REG_PSPREL(P8, UNW_REG_RNAT, t, arg); break; + case 15: UNW_DEC_REG_SPREL(P8, UNW_REG_RNAT, t, arg); break; + case 16: UNW_DEC_PRIUNAT_WHEN_GR(P8, t, arg); break; + case 17: UNW_DEC_PRIUNAT_PSPREL(P8, t, arg); break; + case 18: UNW_DEC_PRIUNAT_SPREL(P8, t, arg); break; + case 19: UNW_DEC_PRIUNAT_WHEN_MEM(P8, t, arg); break; + default: UNW_DEC_BAD_CODE(r); break; + } + } + break; + + case 0x1: + byte1 = *dp++; byte2 = *dp++; + UNW_DEC_GR_GR(P9, (byte1 & 0xf), (byte2 & 0x7f), arg); + break; + + case 0xf: /* p10 */ + byte1 = *dp++; byte2 = *dp++; + UNW_DEC_ABI(P10, byte1, byte2, arg); + break; + + case 0x9: + return unw_decode_x1 (dp, code, arg); + + case 0xa: + return unw_decode_x2 (dp, code, arg); + + case 0xb: + return unw_decode_x3 (dp, code, arg); + + case 0xc: + return unw_decode_x4 (dp, code, arg); + + default: + UNW_DEC_BAD_CODE(code); + break; + } + } + return dp; +} + +static unsigned char * +unw_decode_b1 (unsigned char *dp, unsigned char code, void *arg) +{ + unw_word label = (code & 0x1f); + + if ((code & 0x20) != 0) + UNW_DEC_COPY_STATE(B1, label, arg); + else + UNW_DEC_LABEL_STATE(B1, label, arg); + return dp; +} + +static unsigned char * +unw_decode_b2 (unsigned char *dp, unsigned char code, void *arg) +{ + unw_word t; + + t = unw_decode_uleb128 (&dp); + UNW_DEC_EPILOGUE(B2, t, (code & 0x1f), arg); + return dp; +} + +static unsigned char * +unw_decode_b3_x4 (unsigned char *dp, unsigned char code, void *arg) +{ + unw_word t, ecount, label; + + if ((code & 0x10) == 0) + { + t = unw_decode_uleb128 (&dp); + ecount = unw_decode_uleb128 (&dp); + UNW_DEC_EPILOGUE(B3, t, ecount, arg); + } + else if ((code & 0x07) == 0) + { + label = unw_decode_uleb128 (&dp); + if ((code & 0x08) != 0) + UNW_DEC_COPY_STATE(B4, label, arg); + else + UNW_DEC_LABEL_STATE(B4, label, arg); + } + else + switch (code & 0x7) + { + case 1: return unw_decode_x1 (dp, code, arg); + case 2: return unw_decode_x2 (dp, code, arg); + case 3: return unw_decode_x3 (dp, code, arg); + case 4: return unw_decode_x4 (dp, code, arg); + default: UNW_DEC_BAD_CODE(code); break; + } + return dp; +} + +typedef unsigned char *(*unw_decoder) (unsigned char *, unsigned char, void *); + +static unw_decoder unw_decode_table[2][8] = +{ + /* prologue table: */ + { + unw_decode_r1, /* 0 */ + unw_decode_r1, + unw_decode_r2, + unw_decode_r3, + unw_decode_p1, /* 4 */ + unw_decode_p2_p5, + unw_decode_p6, + unw_decode_p7_p10 + }, + { + unw_decode_r1, /* 0 */ + unw_decode_r1, + unw_decode_r2, + unw_decode_r3, + unw_decode_b1, /* 4 */ + unw_decode_b1, + unw_decode_b2, + unw_decode_b3_x4 + } +}; + +/* + * Decode one descriptor and return address of next descriptor. + */ +static inline unsigned char * +unw_decode (unsigned char *dp, int inside_body, void *arg) +{ + unw_decoder decoder; + unsigned char code; + + code = *dp++; + decoder = unw_decode_table[inside_body][code >> 5]; + dp = (*decoder) (dp, code, arg); + return dp; +} -- cgit v1.2.3