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ARM64 kimage_offset can be calculated if kaslr voffset is known. Add #7

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ARM64 kimage_offset can be calculated if kaslr voffset is known. Add #7

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19 changes: 19 additions & 0 deletions arm64.c
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Original file line number Diff line number Diff line change
Expand Up @@ -27,6 +27,7 @@
static struct machine_specific arm64_machine_specific = { 0 };
static int arm64_verify_symbol(const char *, ulong, char);
static void arm64_parse_cmdline_args(void);
static void arm64_calc_kimage_voffset(void);
static void arm64_calc_phys_offset(void);
static void arm64_calc_virtual_memory_ranges(void);
static int arm64_kdump_phys_base(ulong *);
Expand Down Expand Up @@ -323,6 +324,9 @@ arm64_init(int when)
machdep->verify_line_number = NULL;
machdep->init_kernel_pgd = arm64_init_kernel_pgd;

/* use machdep parameters */
arm64_calc_kimage_voffset();

/* use machdep parameters */
arm64_calc_phys_offset();

Expand Down Expand Up @@ -735,6 +739,21 @@ arm64_parse_cmdline_args(void)
}
}

static void
arm64_calc_kimage_voffset(void)
{
struct machine_specific *ms = machdep->machspec;
ulong phys_offset;

if (ms->kimage_voffset) /* vmcoreinfo/--machdep override */
return;

if ((kt->flags2 & KASLR) && (kt->flags & RELOC_SET)){
arm_kdump_phys_base(&phys_offset);
ms->kimage_voffset = ms->vmalloc_start_addr + (kt->relocate * -1) - phys_offset;
}

}

static void
arm64_calc_phys_offset(void)
Expand Down