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stand/efi: add modulep to kernel metadata

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This mirrors the functionality of the BIOS amd64 bi_load function,
that stashes the absolute address of the module metadata. This is
required for booting as a Xen dom0 that does relocate the modulep and
the loaded modules, and thus requires adjusting the offset.

No functional change introduced, further patches will make use of this
functionality for Xen dom0 loading.

Sponsored by:		Citrix Systems R&D
Reviewed by:		imp
Differential revision:	https://reviews.freebsd.org/D28496
This commit is contained in:
Roger Pau Monné 2021-02-05 11:11:36 +01:00
parent ed87efbe24
commit 7d3259775c
1 changed files with 6 additions and 3 deletions
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9
stand/efi/loader/bootinfo.c
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@ -439,7 +439,7 @@ bi_load(char *args, vm_offset_t *modulep, vm_offset_t *kernendp, bool exit_bs)
struct devdesc *rootdev;
struct file_metadata *md;
vm_offset_t addr;
uint64_t kernend;
uint64_t kernend, module;
uint64_t envp;
vm_offset_t size;
char *rootdevname;
@ -518,6 +518,10 @@ bi_load(char *args, vm_offset_t *modulep, vm_offset_t *kernendp, bool exit_bs)
if (kfp == NULL)
panic("can't find kernel file");
kernend = 0; /* fill it in later */
/* Figure out the size and location of the metadata. */
module = *modulep = addr;
file_addmetadata(kfp, MODINFOMD_HOWTO, sizeof(howto), &howto);
file_addmetadata(kfp, MODINFOMD_ENVP, sizeof(envp), &envp);
#if defined(LOADER_FDT_SUPPORT)
@ -528,14 +532,13 @@ bi_load(char *args, vm_offset_t *modulep, vm_offset_t *kernendp, bool exit_bs)
"device tree blob found!\n");
#endif
file_addmetadata(kfp, MODINFOMD_KERNEND, sizeof(kernend), &kernend);
file_addmetadata(kfp, MODINFOMD_MODULEP, sizeof(module), &module);
file_addmetadata(kfp, MODINFOMD_FW_HANDLE, sizeof(ST), &ST);
#ifdef LOADER_GELI_SUPPORT
geli_export_key_metadata(kfp);
#endif
bi_load_efi_data(kfp, exit_bs);
/* Figure out the size and location of the metadata. */
*modulep = addr;
size = bi_copymodules(0);
kernend = roundup(addr + size, PAGE_SIZE);
*kernendp = kernend;