diff options
Diffstat (limited to 'arch/riscv')
| -rw-r--r-- | arch/riscv/Makefile | 1 | ||||
| -rw-r--r-- | arch/riscv/errata/andes/Makefile | 4 | ||||
| -rw-r--r-- | arch/riscv/include/asm/ftrace.h | 21 | ||||
| -rw-r--r-- | arch/riscv/include/asm/kprobes.h | 11 | ||||
| -rw-r--r-- | arch/riscv/include/asm/uprobes.h | 13 | ||||
| -rw-r--r-- | arch/riscv/kernel/irq.c | 4 | ||||
| -rw-r--r-- | arch/riscv/kernel/setup.c | 13 | ||||
| -rw-r--r-- | arch/riscv/kernel/signal.c | 7 | ||||
| -rw-r--r-- | arch/riscv/kernel/traps.c | 28 | ||||
| -rw-r--r-- | arch/riscv/net/bpf_jit_comp64.c | 18 |
10 files changed, 79 insertions, 41 deletions
diff --git a/arch/riscv/Makefile b/arch/riscv/Makefile index 1329e060c548..b43a6bb7e4dc 100644 --- a/arch/riscv/Makefile +++ b/arch/riscv/Makefile @@ -6,7 +6,6 @@ # for more details. # -OBJCOPYFLAGS := -O binary LDFLAGS_vmlinux := -z norelro ifeq ($(CONFIG_RELOCATABLE),y) LDFLAGS_vmlinux += -shared -Bsymbolic -z notext --emit-relocs diff --git a/arch/riscv/errata/andes/Makefile b/arch/riscv/errata/andes/Makefile index 2d644e19caef..6278c389b801 100644 --- a/arch/riscv/errata/andes/Makefile +++ b/arch/riscv/errata/andes/Makefile @@ -1 +1,5 @@ +ifdef CONFIG_RISCV_ALTERNATIVE_EARLY +CFLAGS_errata.o := -mcmodel=medany +endif + obj-y += errata.o diff --git a/arch/riscv/include/asm/ftrace.h b/arch/riscv/include/asm/ftrace.h index 740a979171e5..2b2f5df7ef2c 100644 --- a/arch/riscv/include/asm/ftrace.h +++ b/arch/riscv/include/asm/ftrace.h @@ -31,6 +31,27 @@ static inline unsigned long ftrace_call_adjust(unsigned long addr) return addr; } +/* + * Let's do like x86/arm64 and ignore the compat syscalls. + */ +#define ARCH_TRACE_IGNORE_COMPAT_SYSCALLS +static inline bool arch_trace_is_compat_syscall(struct pt_regs *regs) +{ + return is_compat_task(); +} + +#define ARCH_HAS_SYSCALL_MATCH_SYM_NAME +static inline bool arch_syscall_match_sym_name(const char *sym, + const char *name) +{ + /* + * Since all syscall functions have __riscv_ prefix, we must skip it. + * However, as we described above, we decided to ignore compat + * syscalls, so we don't care about __riscv_compat_ prefix here. + */ + return !strcmp(sym + 8, name); +} + struct dyn_arch_ftrace { }; #endif diff --git a/arch/riscv/include/asm/kprobes.h b/arch/riscv/include/asm/kprobes.h index e7882ccb0fd4..78ea44f76718 100644 --- a/arch/riscv/include/asm/kprobes.h +++ b/arch/riscv/include/asm/kprobes.h @@ -40,6 +40,15 @@ void arch_remove_kprobe(struct kprobe *p); int kprobe_fault_handler(struct pt_regs *regs, unsigned int trapnr); bool kprobe_breakpoint_handler(struct pt_regs *regs); bool kprobe_single_step_handler(struct pt_regs *regs); - +#else +static inline bool kprobe_breakpoint_handler(struct pt_regs *regs) +{ + return false; +} + +static inline bool kprobe_single_step_handler(struct pt_regs *regs) +{ + return false; +} #endif /* CONFIG_KPROBES */ #endif /* _ASM_RISCV_KPROBES_H */ diff --git a/arch/riscv/include/asm/uprobes.h b/arch/riscv/include/asm/uprobes.h index f2183e00fdd2..3fc7deda9190 100644 --- a/arch/riscv/include/asm/uprobes.h +++ b/arch/riscv/include/asm/uprobes.h @@ -34,7 +34,18 @@ struct arch_uprobe { bool simulate; }; +#ifdef CONFIG_UPROBES bool uprobe_breakpoint_handler(struct pt_regs *regs); bool uprobe_single_step_handler(struct pt_regs *regs); - +#else +static inline bool uprobe_breakpoint_handler(struct pt_regs *regs) +{ + return false; +} + +static inline bool uprobe_single_step_handler(struct pt_regs *regs) +{ + return false; +} +#endif /* CONFIG_UPROBES */ #endif /* _ASM_RISCV_UPROBES_H */ diff --git a/arch/riscv/kernel/irq.c b/arch/riscv/kernel/irq.c index a8efa053c4a5..9cc0a7669271 100644 --- a/arch/riscv/kernel/irq.c +++ b/arch/riscv/kernel/irq.c @@ -60,7 +60,7 @@ static void init_irq_stacks(void) } #endif /* CONFIG_VMAP_STACK */ -#ifdef CONFIG_HAVE_SOFTIRQ_ON_OWN_STACK +#ifdef CONFIG_SOFTIRQ_ON_OWN_STACK void do_softirq_own_stack(void) { #ifdef CONFIG_IRQ_STACKS @@ -92,7 +92,7 @@ void do_softirq_own_stack(void) #endif __do_softirq(); } -#endif /* CONFIG_HAVE_SOFTIRQ_ON_OWN_STACK */ +#endif /* CONFIG_SOFTIRQ_ON_OWN_STACK */ #else static void init_irq_stacks(void) {} diff --git a/arch/riscv/kernel/setup.c b/arch/riscv/kernel/setup.c index e600aab116a4..aac853ae4eb7 100644 --- a/arch/riscv/kernel/setup.c +++ b/arch/riscv/kernel/setup.c @@ -173,19 +173,6 @@ static void __init init_resources(void) if (ret < 0) goto error; -#ifdef CONFIG_KEXEC_CORE - if (crashk_res.start != crashk_res.end) { - ret = add_resource(&iomem_resource, &crashk_res); - if (ret < 0) - goto error; - } - if (crashk_low_res.start != crashk_low_res.end) { - ret = add_resource(&iomem_resource, &crashk_low_res); - if (ret < 0) - goto error; - } -#endif - #ifdef CONFIG_CRASH_DUMP if (elfcorehdr_size > 0) { elfcorehdr_res.start = elfcorehdr_addr; diff --git a/arch/riscv/kernel/signal.c b/arch/riscv/kernel/signal.c index 180d951d3624..21a4d0e111bc 100644 --- a/arch/riscv/kernel/signal.c +++ b/arch/riscv/kernel/signal.c @@ -311,13 +311,6 @@ static inline void __user *get_sigframe(struct ksignal *ksig, /* Align the stack frame. */ sp &= ~0xfUL; - /* - * Fail if the size of the altstack is not large enough for the - * sigframe construction. - */ - if (current->sas_ss_size && sp < current->sas_ss_sp) - return (void __user __force *)-1UL; - return (void __user *)sp; } diff --git a/arch/riscv/kernel/traps.c b/arch/riscv/kernel/traps.c index 19807c4d3805..fae8f610d867 100644 --- a/arch/riscv/kernel/traps.c +++ b/arch/riscv/kernel/traps.c @@ -13,6 +13,8 @@ #include <linux/kdebug.h> #include <linux/uaccess.h> #include <linux/kprobes.h> +#include <linux/uprobes.h> +#include <asm/uprobes.h> #include <linux/mm.h> #include <linux/module.h> #include <linux/irq.h> @@ -247,22 +249,28 @@ static inline unsigned long get_break_insn_length(unsigned long pc) return GET_INSN_LENGTH(insn); } +static bool probe_single_step_handler(struct pt_regs *regs) +{ + bool user = user_mode(regs); + + return user ? uprobe_single_step_handler(regs) : kprobe_single_step_handler(regs); +} + +static bool probe_breakpoint_handler(struct pt_regs *regs) +{ + bool user = user_mode(regs); + + return user ? uprobe_breakpoint_handler(regs) : kprobe_breakpoint_handler(regs); +} + void handle_break(struct pt_regs *regs) { -#ifdef CONFIG_KPROBES - if (kprobe_single_step_handler(regs)) + if (probe_single_step_handler(regs)) return; - if (kprobe_breakpoint_handler(regs)) - return; -#endif -#ifdef CONFIG_UPROBES - if (uprobe_single_step_handler(regs)) + if (probe_breakpoint_handler(regs)) return; - if (uprobe_breakpoint_handler(regs)) - return; -#endif current->thread.bad_cause = regs->cause; if (user_mode(regs)) diff --git a/arch/riscv/net/bpf_jit_comp64.c b/arch/riscv/net/bpf_jit_comp64.c index ecd3ae6f4116..8581693e62d3 100644 --- a/arch/riscv/net/bpf_jit_comp64.c +++ b/arch/riscv/net/bpf_jit_comp64.c @@ -245,7 +245,7 @@ static void __build_epilogue(bool is_tail_call, struct rv_jit_context *ctx) emit_addi(RV_REG_SP, RV_REG_SP, stack_adjust, ctx); /* Set return value. */ if (!is_tail_call) - emit_mv(RV_REG_A0, RV_REG_A5, ctx); + emit_addiw(RV_REG_A0, RV_REG_A5, 0, ctx); emit_jalr(RV_REG_ZERO, is_tail_call ? RV_REG_T3 : RV_REG_RA, is_tail_call ? (RV_FENTRY_NINSNS + 1) * 4 : 0, /* skip reserved nops and TCC init */ ctx); @@ -759,8 +759,10 @@ static int invoke_bpf_prog(struct bpf_tramp_link *l, int args_off, int retval_of if (ret) return ret; - if (save_ret) - emit_sd(RV_REG_FP, -retval_off, regmap[BPF_REG_0], ctx); + if (save_ret) { + emit_sd(RV_REG_FP, -retval_off, RV_REG_A0, ctx); + emit_sd(RV_REG_FP, -(retval_off - 8), regmap[BPF_REG_0], ctx); + } /* update branch with beqz */ if (ctx->insns) { @@ -853,7 +855,7 @@ static int __arch_prepare_bpf_trampoline(struct bpf_tramp_image *im, save_ret = flags & (BPF_TRAMP_F_CALL_ORIG | BPF_TRAMP_F_RET_FENTRY_RET); if (save_ret) { - stack_size += 8; + stack_size += 16; /* Save both A5 (BPF R0) and A0 */ retval_off = stack_size; } @@ -957,6 +959,7 @@ static int __arch_prepare_bpf_trampoline(struct bpf_tramp_image *im, if (ret) goto out; emit_sd(RV_REG_FP, -retval_off, RV_REG_A0, ctx); + emit_sd(RV_REG_FP, -(retval_off - 8), regmap[BPF_REG_0], ctx); im->ip_after_call = ctx->insns + ctx->ninsns; /* 2 nops reserved for auipc+jalr pair */ emit(rv_nop(), ctx); @@ -988,8 +991,10 @@ static int __arch_prepare_bpf_trampoline(struct bpf_tramp_image *im, if (flags & BPF_TRAMP_F_RESTORE_REGS) restore_args(nregs, args_off, ctx); - if (save_ret) + if (save_ret) { emit_ld(RV_REG_A0, -retval_off, RV_REG_FP, ctx); + emit_ld(regmap[BPF_REG_0], -(retval_off - 8), RV_REG_FP, ctx); + } emit_ld(RV_REG_S1, -sreg_off, RV_REG_FP, ctx); @@ -1515,7 +1520,8 @@ out_be: if (ret) return ret; - emit_mv(bpf_to_rv_reg(BPF_REG_0, ctx), RV_REG_A0, ctx); + if (insn->src_reg != BPF_PSEUDO_CALL) + emit_mv(bpf_to_rv_reg(BPF_REG_0, ctx), RV_REG_A0, ctx); break; } /* tail call */ |