diff options
author | marcel <marcel@FreeBSD.org> | 2011-04-03 22:31:51 +0000 |
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committer | marcel <marcel@FreeBSD.org> | 2011-04-03 22:31:51 +0000 |
commit | e253ede76350c4b63552fb9fa2ab251200bba4d6 (patch) | |
tree | eca323dd0978bd6b21c62e82ce8932b641bfb4e0 /sys/boot/common | |
parent | 37c0565836f4c33ee4fcf4b66d577ca704ea5375 (diff) | |
download | FreeBSD-src-e253ede76350c4b63552fb9fa2ab251200bba4d6.zip FreeBSD-src-e253ede76350c4b63552fb9fa2ab251200bba4d6.tar.gz |
Add 2 new archsw interfaces:
1. arch_loadaddr - used by platform code to adjust the address at which
the object gets loaded. Implement PC98 using this new interface instead
of using conditional compilation. For ELF objects the ELF header is
passed as the data pointer. For raw files it's the filename. Note that
ELF objects are first considered as raw files.
2. arch_loadseg - used by platform code to keep track of actual segments,
so that (instruction) caches can be flushed or translations can be
created. Both the ELF header as well as the program header are passed
to allow platform code to treat the kernel proper differently from any
additional modules and to have all the relevant details of the loaded
segment (e.g. protection).
Diffstat (limited to 'sys/boot/common')
-rw-r--r-- | sys/boot/common/bootstrap.h | 18 | ||||
-rw-r--r-- | sys/boot/common/load_elf.c | 19 | ||||
-rw-r--r-- | sys/boot/common/load_elf_obj.c | 6 | ||||
-rw-r--r-- | sys/boot/common/module.c | 25 |
4 files changed, 38 insertions, 30 deletions
diff --git a/sys/boot/common/bootstrap.h b/sys/boot/common/bootstrap.h index bf3f962..d8b4551 100644 --- a/sys/boot/common/bootstrap.h +++ b/sys/boot/common/bootstrap.h @@ -296,6 +296,24 @@ struct arch_switch /* Perform ISA byte port I/O (only for systems with ISA) */ int (*arch_isainb)(int port); void (*arch_isaoutb)(int port, int value); + + /* + * Interface to adjust the load address according to the "object" + * being loaded. + */ + uint64_t (*arch_loadaddr)(u_int type, void *data, uint64_t addr); +#define LOAD_ELF 1 /* data points to the ELF header. */ +#define LOAD_RAW 2 /* data points to the file name. */ + + /* + * Interface to inform MD code about a loaded (ELF) segment. This + * can be used to flush caches and/or set up translations. + */ +#ifdef __elfN + void (*arch_loadseg)(Elf_Ehdr *eh, Elf_Phdr *ph, uint64_t delta); +#else + void (*arch_loadseg)(void *eh, void *ph, uint64_t delta); +#endif }; extern struct arch_switch archsw; diff --git a/sys/boot/common/load_elf.c b/sys/boot/common/load_elf.c index f0880b1..ee6389f 100644 --- a/sys/boot/common/load_elf.c +++ b/sys/boot/common/load_elf.c @@ -97,7 +97,6 @@ __elfN(loadfile)(char *filename, u_int64_t dest, struct preloaded_file **result) struct elf_file ef; Elf_Ehdr *ehdr; int err; - u_int pad; ssize_t bytes_read; fp = NULL; @@ -157,12 +156,6 @@ __elfN(loadfile)(char *filename, u_int64_t dest, struct preloaded_file **result) /* Looks OK, got ahead */ ef.kernel = 0; - /* Page-align the load address */ - pad = (u_int)dest & PAGE_MASK; - if (pad != 0) { - pad = PAGE_SIZE - pad; - dest += pad; - } } else if (ehdr->e_type == ET_EXEC) { /* Looks like a kernel */ if (kfp != NULL) { @@ -173,7 +166,7 @@ __elfN(loadfile)(char *filename, u_int64_t dest, struct preloaded_file **result) /* * Calculate destination address based on kernel entrypoint */ - dest = ehdr->e_entry; + dest = (ehdr->e_entry & ~PAGE_MASK); if (dest == 0) { printf("elf" __XSTRING(__ELF_WORD_SIZE) "_loadfile: not a kernel (maybe static binary?)\n"); err = EPERM; @@ -186,6 +179,11 @@ __elfN(loadfile)(char *filename, u_int64_t dest, struct preloaded_file **result) goto oerr; } + if (archsw.arch_loadaddr != NULL) + dest = archsw.arch_loadaddr(LOAD_ELF, ehdr, dest); + else + dest = roundup(dest, PAGE_SIZE); + /* * Ok, we think we should handle this. */ @@ -202,7 +200,7 @@ __elfN(loadfile)(char *filename, u_int64_t dest, struct preloaded_file **result) #ifdef ELF_VERBOSE if (ef.kernel) - printf("%s entry at 0x%jx\n", filename, (uintmax_t)dest); + printf("%s entry at 0x%jx\n", filename, (uintmax_t)ehdr->e_entry); #else printf("%s ", filename); #endif @@ -362,6 +360,9 @@ __elfN(loadimage)(struct preloaded_file *fp, elf_file_t ef, u_int64_t off) printf("\n"); #endif + if (archsw.arch_loadseg != NULL) + archsw.arch_loadseg(ehdr, phdr + i, off); + if (firstaddr == 0 || firstaddr > (phdr[i].p_vaddr + off)) firstaddr = phdr[i].p_vaddr + off; if (lastaddr == 0 || lastaddr < (phdr[i].p_vaddr + off + phdr[i].p_memsz)) diff --git a/sys/boot/common/load_elf_obj.c b/sys/boot/common/load_elf_obj.c index 6f3b349..dcd71ef 100644 --- a/sys/boot/common/load_elf_obj.c +++ b/sys/boot/common/load_elf_obj.c @@ -144,8 +144,10 @@ __elfN(obj_loadfile)(char *filename, u_int64_t dest, goto oerr; } - /* Page-align the load address */ - dest = roundup(dest, PAGE_SIZE); + if (archsw.arch_loadaddr != NULL) + dest = archsw.arch_loadaddr(LOAD_ELF, hdr, dest); + else + dest = roundup(dest, PAGE_SIZE); /* * Ok, we think we should handle this. diff --git a/sys/boot/common/module.c b/sys/boot/common/module.c index 063fcdf..728992d 100644 --- a/sys/boot/common/module.c +++ b/sys/boot/common/module.c @@ -275,6 +275,9 @@ file_load(char *filename, vm_offset_t dest, struct preloaded_file **result) int error; int i; + if (archsw.arch_loadaddr != NULL) + dest = archsw.arch_loadaddr(LOAD_RAW, filename, dest); + error = EFTYPE; for (i = 0, fp = NULL; file_formats[i] && fp == NULL; i++) { error = (file_formats[i]->l_load)(filename, loadaddr, &fp); @@ -352,9 +355,6 @@ file_loadraw(char *type, char *name) char *cp; int fd, got; vm_offset_t laddr; -#ifdef PC98 - struct stat st; -#endif /* We can't load first */ if ((file_findfile(NULL, NULL)) == NULL) { @@ -369,20 +369,15 @@ file_loadraw(char *type, char *name) return(CMD_ERROR); } name = cp; - + if ((fd = open(name, O_RDONLY)) < 0) { sprintf(command_errbuf, "can't open '%s': %s", name, strerror(errno)); free(name); return(CMD_ERROR); } -#ifdef PC98 - /* We cannot use 15M-16M area on pc98. */ - if (loadaddr < 0x1000000 && - fstat(fd, &st) == 0 && - (st.st_size == -1 || loadaddr + st.st_size > 0xf00000)) - loadaddr = 0x1000000; -#endif + if (archsw.arch_loadaddr != NULL) + loadaddr = archsw.arch_loadaddr(LOAD_RAW, name, loadaddr); laddr = loadaddr; for (;;) { @@ -489,14 +484,6 @@ mod_loadkld(const char *kldname, int argc, char *argv[]) ; do { -#ifdef PC98 - /* We cannot use 15M-16M area on pc98. */ - struct stat st; - if (loadaddr < 0x1000000 && - stat(filename, &st) == 0 && - (st.st_size == -1 || loadaddr + st.st_size > 0xf00000)) - loadaddr = 0x1000000; -#endif err = file_load(filename, loadaddr, &fp); if (err) break; |