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author | Aaron Durbin <adurbin@chromium.org> | 2014-03-10 16:13:58 -0500 |
---|---|---|
committer | Stefan Reinauer <stefan.reinauer@coreboot.org> | 2014-03-20 23:55:55 +0100 |
commit | 3eb8eb7eba55cdfd64c8d50181ea066526ff6485 (patch) | |
tree | 6e465cb8cdd4c4f31450f387ae6560d65c9a8224 /src/lib/rmodule.c | |
parent | 4fde5a66b4a2b4117a45519ab0f63a9fd6bff835 (diff) | |
download | coreboot-3eb8eb7eba55cdfd64c8d50181ea066526ff6485.tar.xz |
rmodules: use rmodtool to create rmodules
Start using the rmodtool for generating rmodules.
rmodule_link() has been changed to create 2 rules:
one for the passed in <name>, the other for creating
<name>.rmod which is an ELF file in the format of
an rmodule.
Since the header is not compiled and linked together
with an rmodule there needs to be a way of marking
which symbol is the entry point. __rmodule_entry is
the symbol used for knowing the entry point. There
was a little churn in SMM modules to ensure an
rmodule entry point symbol takes a single argument.
Change-Id: Ie452ed866f6596bf13f137f5b832faa39f48d26e
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/5379
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Tested-by: build bot (Jenkins)
Diffstat (limited to 'src/lib/rmodule.c')
-rw-r--r-- | src/lib/rmodule.c | 86 |
1 files changed, 15 insertions, 71 deletions
diff --git a/src/lib/rmodule.c b/src/lib/rmodule.c index 2cb70b8f33..a73e667fef 100644 --- a/src/lib/rmodule.c +++ b/src/lib/rmodule.c @@ -26,44 +26,6 @@ /* Change this define to get more verbose debugging for module loading. */ #define PK_ADJ_LEVEL BIOS_NEVER -#if CONFIG_ARCH_X86 -/* - * On X86, the only relocations currently allowed are R_386_RELATIVE which - * have '0' for the symbol info in the relocation metadata (in r_info). - * The reason is that the module is fully linked and just has the relocations' - * locations. - */ -typedef struct { - uint32_t r_offset; - uint32_t r_info; -} Elf32_Rel; - -#define R_386_RELATIVE 8 - -#define RELOCTION_ENTRY_SIZE sizeof(Elf32_Rel) -static inline int rmodule_reloc_offset(const void *reloc) -{ - const Elf32_Rel *rel = reloc; - return rel->r_offset; -} - -static inline int rmodule_reloc_valid(const void *reloc) -{ - const Elf32_Rel *rel = reloc; - return (rel->r_info == R_386_RELATIVE); -} - -static inline void *remodule_next_reloc(const void *reloc) -{ - const Elf32_Rel *rel = reloc; - rel++; - return (void *)rel; -} - -#else -#error Arch needs to add relocation information support for RMODULE -#endif - static inline int rmodule_is_loaded(const struct rmodule *module) { return module->location != NULL; @@ -71,7 +33,7 @@ static inline int rmodule_is_loaded(const struct rmodule *module) /* Calculate a loaded program address based on the blob address. */ static inline void *rmodule_load_addr(const struct rmodule *module, - uint32_t blob_addr) + uintptr_t blob_addr) { char *loc = module->location; return &loc[blob_addr - module->header->module_link_start_address]; @@ -151,13 +113,13 @@ static void rmodule_clear_bss(struct rmodule *module) memset(begin, 0, size); } -static inline int rmodule_number_relocations(const struct rmodule *module) +static inline size_t rmodule_number_relocations(const struct rmodule *module) { - int r; + size_t r; r = module->header->relocations_end_offset; r -= module->header->relocations_begin_offset; - r /= RELOCTION_ENTRY_SIZE; + r /= sizeof(uintptr_t); return r; } @@ -176,51 +138,33 @@ static void rmodule_copy_payload(const struct rmodule *module) memcpy(module->location, module->payload, module->payload_size); } -static inline uint32_t *rmodule_adjustment_location(const struct rmodule *module, - const void *reloc) -{ - int reloc_offset; - - /* Don't relocate header field entries -- only program relocations. */ - reloc_offset = rmodule_reloc_offset(reloc); - if (reloc_offset < module->header->module_link_start_address) - return NULL; - - return rmodule_load_addr(module, reloc_offset); -} - static int rmodule_relocate(const struct rmodule *module) { - int num_relocations; - const void *reloc; - uint32_t adjustment; + size_t num_relocations; + const uintptr_t *reloc; + uintptr_t adjustment; /* Each relocation needs to be adjusted relative to the beginning of * the loaded program. */ - adjustment = (uint32_t)rmodule_load_addr(module, 0); + adjustment = (uintptr_t)rmodule_load_addr(module, 0); reloc = module->relocations; num_relocations = rmodule_number_relocations(module); - printk(BIOS_DEBUG, "Processing %d relocs with adjust value of 0x%08x\n", + printk(BIOS_DEBUG, "Processing %zu relocs. Offset value of 0x%08x\n", num_relocations, adjustment); while (num_relocations > 0) { - uint32_t *adjust_loc; - - if (!rmodule_reloc_valid(reloc)) - return -1; + uintptr_t *adjust_loc; /* If the adjustment location is non-NULL adjust it. */ - adjust_loc = rmodule_adjustment_location(module, reloc); - if (adjust_loc != NULL) { - printk(PK_ADJ_LEVEL, "Adjusting %p: 0x%08x -> 0x%08x\n", + adjust_loc = rmodule_load_addr(module, *reloc); + printk(PK_ADJ_LEVEL, "Adjusting %p: 0x%08x -> 0x%08x\n", adjust_loc, *adjust_loc, *adjust_loc + adjustment); *adjust_loc += adjustment; - } - reloc = remodule_next_reloc(reloc); + reloc++; num_relocations--; } @@ -232,8 +176,8 @@ int rmodule_load_alignment(const struct rmodule *module) /* The load alignment is the start of the program's linked address. * The base address where the program is loaded needs to be a multiple * of the program's starting link address. That way all data alignment - * in the program is preserved. */ - return module->header->module_link_start_address; + * in the program is preserved. Default to 4KiB. */ + return 4096; } int rmodule_load(void *base, struct rmodule *module) |