diff options
Diffstat (limited to 'arch/sh/kernel/dwarf.c')
| -rw-r--r-- | arch/sh/kernel/dwarf.c | 58 |
1 files changed, 22 insertions, 36 deletions
diff --git a/arch/sh/kernel/dwarf.c b/arch/sh/kernel/dwarf.c index 49c09c7d5b77..a1b54bedc929 100644 --- a/arch/sh/kernel/dwarf.c +++ b/arch/sh/kernel/dwarf.c @@ -1,10 +1,7 @@ +// SPDX-License-Identifier: GPL-2.0 /* * Copyright (C) 2009 Matt Fleming <matt@console-pimps.org> * - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * * This is an implementation of a DWARF unwinder. Its main purpose is * for generating stacktrace information. Based on the DWARF 3 * specification from http://www.dwarfstd.org. @@ -27,7 +24,7 @@ #include <asm/dwarf.h> #include <asm/unwinder.h> #include <asm/sections.h> -#include <asm/unaligned.h> +#include <linux/unaligned.h> #include <asm/stacktrace.h> /* Reserve enough memory for two stack frames */ @@ -347,7 +344,7 @@ out: * dwarf_lookup_fde - locate the FDE that covers pc * @pc: the program counter */ -struct dwarf_fde *dwarf_lookup_fde(unsigned long pc) +static struct dwarf_fde *dwarf_lookup_fde(unsigned long pc) { struct rb_node **rb_node = &fde_root.rb_node; struct dwarf_fde *fde = NULL; @@ -599,7 +596,7 @@ struct dwarf_frame *dwarf_unwind_stack(unsigned long pc, * time this function makes its first function call. */ if (!pc || !prev) - pc = (unsigned long)current_text_addr(); + pc = _THIS_IP_; #ifdef CONFIG_FUNCTION_GRAPH_TRACER /* @@ -608,17 +605,18 @@ struct dwarf_frame *dwarf_unwind_stack(unsigned long pc, * expected to find the real return address. */ if (pc == (unsigned long)&return_to_handler) { - int index = current->curr_ret_stack; + struct ftrace_ret_stack *ret_stack; + ret_stack = ftrace_graph_get_ret_stack(current, 0); + if (ret_stack) + pc = ret_stack->ret; /* * We currently have no way of tracking how many * return_to_handler()'s we've seen. If there is more * than one patched return address on our stack, * complain loudly. */ - WARN_ON(index > 0); - - pc = current->ret_stack[index].ret; + WARN_ON(ftrace_graph_get_ret_stack(current, 1)); } #endif @@ -993,32 +991,24 @@ static struct unwinder dwarf_unwinder = { .rating = 150, }; -static void dwarf_unwinder_cleanup(void) +static void __init dwarf_unwinder_cleanup(void) { - struct rb_node **fde_rb_node = &fde_root.rb_node; - struct rb_node **cie_rb_node = &cie_root.rb_node; + struct dwarf_fde *fde, *next_fde; + struct dwarf_cie *cie, *next_cie; /* * Deallocate all the memory allocated for the DWARF unwinder. * Traverse all the FDE/CIE lists and remove and free all the * memory associated with those data structures. */ - while (*fde_rb_node) { - struct dwarf_fde *fde; - - fde = rb_entry(*fde_rb_node, struct dwarf_fde, node); - rb_erase(*fde_rb_node, &fde_root); + rbtree_postorder_for_each_entry_safe(fde, next_fde, &fde_root, node) kfree(fde); - } - - while (*cie_rb_node) { - struct dwarf_cie *cie; - cie = rb_entry(*cie_rb_node, struct dwarf_cie, node); - rb_erase(*cie_rb_node, &cie_root); + rbtree_postorder_for_each_entry_safe(cie, next_cie, &cie_root, node) kfree(cie); - } + mempool_destroy(dwarf_reg_pool); + mempool_destroy(dwarf_frame_pool); kmem_cache_destroy(dwarf_reg_cachep); kmem_cache_destroy(dwarf_frame_cachep); } @@ -1180,23 +1170,19 @@ static int __init dwarf_unwinder_init(void) dwarf_frame_cachep = kmem_cache_create("dwarf_frames", sizeof(struct dwarf_frame), 0, - SLAB_PANIC | SLAB_HWCACHE_ALIGN | SLAB_NOTRACK, NULL); + SLAB_PANIC | SLAB_HWCACHE_ALIGN, NULL); dwarf_reg_cachep = kmem_cache_create("dwarf_regs", sizeof(struct dwarf_reg), 0, - SLAB_PANIC | SLAB_HWCACHE_ALIGN | SLAB_NOTRACK, NULL); + SLAB_PANIC | SLAB_HWCACHE_ALIGN, NULL); - dwarf_frame_pool = mempool_create(DWARF_FRAME_MIN_REQ, - mempool_alloc_slab, - mempool_free_slab, - dwarf_frame_cachep); + dwarf_frame_pool = mempool_create_slab_pool(DWARF_FRAME_MIN_REQ, + dwarf_frame_cachep); if (!dwarf_frame_pool) goto out; - dwarf_reg_pool = mempool_create(DWARF_REG_MIN_REQ, - mempool_alloc_slab, - mempool_free_slab, - dwarf_reg_cachep); + dwarf_reg_pool = mempool_create_slab_pool(DWARF_REG_MIN_REQ, + dwarf_reg_cachep); if (!dwarf_reg_pool) goto out; |