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根据KP修复

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This commit is contained in:
liankong
2025-03-30 18:10:14 +08:00
parent 5e77c08872
commit 656cd11876
1 changed files with 51 additions and 5 deletions
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56
kernel/kpm/kpm.c
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@@ -38,6 +38,9 @@
#include <linux/kprobes.h>
#include <linux/stacktrace.h>
#include <linux/kallsyms.h>
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5,0,0) && defined(CONFIG_MODULES)
#include <linux/moduleloader.h> // 需要启用 CONFIG_MODULES
#endif
#include "kpm.h"
#include "compact.h"
@@ -56,8 +59,8 @@ static inline void flush_icache_all(void)
asm volatile("isb" : : : "memory");
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5,0,0) && defined(CONFIG_MODULES)
#include <linux/moduleloader.h> // 需要启用 CONFIG_MODULES
#ifndef align
#define align(X) ALIGN(X, page_size)
#endif
/**
@@ -300,18 +303,61 @@ static long kpm_get_offset(struct kpm_module *mod, unsigned int *size, Elf64_Shd
return ret;
}
static void kpm_layout_sections(struct kpm_module *mod, struct kpm_load_info *info)
/*static void kpm_layout_sections(struct kpm_module *mod, struct kpm_load_info *info)
{
int i;
for (i = 0; i < info->ehdr->e_shnum; i++)
info->sechdrs[i].sh_entsize = ~0UL;
for (i = 0; i < info->ehdr->e_shnum; i++) {
Elf64_Shdr *s = &info->sechdrs[i];
if (!(s->sh_flags & SHF_ALLOC))
continue;
s->sh_entsize = kpm_get_offset(mod, &mod->size, s);
}
mod->size = ALIGN(mod->size, 8);
}*/
static void kpm_layout_sections(struct kpm_module *mod, struct kpm_load_info *info)
{
static unsigned long const masks[][2] = {
/* NOTE: all executable code must be the first section in this array; otherwise modify the text_size finder in the two loops below */
{ SHF_EXECINSTR | SHF_ALLOC, ARCH_SHF_SMALL },
{ SHF_ALLOC, SHF_WRITE | ARCH_SHF_SMALL },
{ SHF_WRITE | SHF_ALLOC, ARCH_SHF_SMALL },
{ ARCH_SHF_SMALL | SHF_ALLOC, 0 }
};
int i, m;
for (i = 0; i < info->ehdr->e_shnum; i++)
info->sechdrs[i].sh_entsize = ~0UL;
// todo: tslf alloc all rwx and not page aligned
for (m = 0; m < sizeof(masks) / sizeof(masks[0]); ++m) {
for (i = 0; i < info->ehdr->e_shnum; ++i) {
Elf_Shdr *s = &info->sechdrs[i];
if ((s->sh_flags & masks[m][0]) != masks[m][0] || (s->sh_flags & masks[m][1]) || s->sh_entsize != ~0UL)
continue;
s->sh_entsize = get_offset(mod, &mod->size, s, i);
// const char *sname = info->secstrings + s->sh_name;
}
switch (m) {
case 0: /* executable */
mod->size = align(mod->size);
mod->text_size = mod->size;
break;
case 1: /* RO: text and ro-data */
mod->size = align(mod->size);
mod->ro_size = mod->size;
break;
case 2:
break;
case 3: /* whole */
mod->size = align(mod->size);
break;
}
}
}
/*-----------------------------------------------------------
@@ -838,8 +884,6 @@ static int kpm_move_module(struct kpm_module *mod, struct kpm_load_info *info)
}
}
flush_icache_all();
/* 更新段头中的虚拟地址 */
shdr->sh_addr = (unsigned long)dest;
curr_offset += shdr->sh_size;
@@ -867,6 +911,8 @@ static int kpm_move_module(struct kpm_module *mod, struct kpm_load_info *info)
mod->info.description = (const char *)((unsigned long)info->info.description + delta);
}
flush_icache_all();
return 0;
}