diff options
| -rw-r--r-- | sys/amd64/amd64/machdep.c | 2 | ||||
| -rw-r--r-- | sys/arm/arm/machdep.c | 6 | ||||
| -rw-r--r-- | sys/arm/xscale/ixp425/avila_machdep.c | 8 | ||||
| -rw-r--r-- | sys/i386/i386/machdep.c | 9 | ||||
| -rw-r--r-- | sys/kern/kern_environment.c | 38 | ||||
| -rw-r--r-- | sys/sparc64/sparc64/machdep.c | 3 |
6 files changed, 50 insertions, 16 deletions
diff --git a/sys/amd64/amd64/machdep.c b/sys/amd64/amd64/machdep.c index 03334f1..15265aa 100644 --- a/sys/amd64/amd64/machdep.c +++ b/sys/amd64/amd64/machdep.c @@ -1847,7 +1847,7 @@ hammer_time(u_int64_t modulep, u_int64_t physfree) if (kmdp == NULL) kmdp = preload_search_by_type("elf64 kernel"); boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int); - kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *) + KERNBASE; + init_static_kenv(MD_FETCH(kmdp, MODINFOMD_ENVP, char *) + KERNBASE, 0); #ifdef DDB ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t); ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t); diff --git a/sys/arm/arm/machdep.c b/sys/arm/arm/machdep.c index a59ecbb..443cc5b 100644 --- a/sys/arm/arm/machdep.c +++ b/sys/arm/arm/machdep.c @@ -826,6 +826,8 @@ fake_preload_metadata(struct arm_boot_params *abp __unused) fake_preload[i] = 0; preload_metadata = (void *)fake_preload; + init_static_kenv(NULL, 0); + return (lastaddr); } @@ -901,6 +903,8 @@ linux_parse_boot_param(struct arm_boot_params *abp) bcopy(atag_list, atags, (char *)walker - (char *)atag_list + ATAG_SIZE(walker)); + init_static_kenv(NULL, 0); + return fake_preload_metadata(abp); } #endif @@ -929,7 +933,7 @@ freebsd_parse_boot_param(struct arm_boot_params *abp) return 0; boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int); - kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *); + init_static_kenv(MD_FETCH(kmdp, MODINFOMD_ENVP, char *), 0); lastaddr = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t); #ifdef DDB ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t); diff --git a/sys/arm/xscale/ixp425/avila_machdep.c b/sys/arm/xscale/ixp425/avila_machdep.c index b1d6734..e72798a 100644 --- a/sys/arm/xscale/ixp425/avila_machdep.c +++ b/sys/arm/xscale/ixp425/avila_machdep.c @@ -223,8 +223,8 @@ initarm(struct arm_boot_params *abp) pcpu_init(pcpup, 0, sizeof(struct pcpu)); PCPU_SET(curthread, &thread0); - if (envmode == 1) - kern_envp = static_env; + init_static_kenv(NULL, 0); + /* Do basic tuning, hz etc */ init_param1(); @@ -420,10 +420,6 @@ initarm(struct arm_boot_params *abp) init_param2(physmem); kdb_init(); - /* use static kernel environment if so configured */ - if (envmode == 1) - kern_envp = static_env; - return ((void *)(kernelstack.pv_va + USPACE_SVC_STACK_TOP - sizeof(struct pcb))); #undef next_page diff --git a/sys/i386/i386/machdep.c b/sys/i386/i386/machdep.c index 36aeca5..f55900c 100644 --- a/sys/i386/i386/machdep.c +++ b/sys/i386/i386/machdep.c @@ -3190,10 +3190,11 @@ init386(first) } else { metadata_missing = 1; } - if (envmode == 1) - kern_envp = static_env; - else if (bootinfo.bi_envp) - kern_envp = (caddr_t)bootinfo.bi_envp + KERNBASE; + + if (bootinfo.bi_envp) + init_static_kenv((caddr_t)bootinfo.bi_envp + KERNBASE, 0); + else + init_static_kenv(NULL, 0); /* Init basic tunables, hz etc */ init_param1(); diff --git a/sys/kern/kern_environment.c b/sys/kern/kern_environment.c index ff453cb..05c4f62 100644 --- a/sys/kern/kern_environment.c +++ b/sys/kern/kern_environment.c @@ -210,12 +210,44 @@ done: return (error); } +/* + * Populate the initial kernel environment. + * + * This is called very early in MD startup, either to provide a copy of the + * environment obtained from a boot loader, or to provide an empty buffer into + * which MD code can store an initial environment using kern_setenv() calls. + * + * If the global envmode is 1, the environment is initialized from the global + * static_env[], regardless of the arguments passed. This implements the env + * keyword described in config(5). In this case env_pos is set to env_len, + * causing kern_setenv() to return -1 (if len > 0) or panic (if len == 0) until + * the dynamic environment is available. The envmode and static_env variables + * are defined in env.c which is generated by config(8). + * + * If len is non-zero, the caller is providing an empty buffer. The caller will + * subsequently use kern_setenv() to add up to len bytes of initial environment + * before the dynamic environment is available. + * + * If len is zero, the caller is providing a pre-loaded buffer containing + * environment strings. Additional strings cannot be added until the dynamic + * environment is available. The memory pointed to must remain stable at least + * until sysinit runs init_dynamic_kenv(). If no initial environment is + * available from the boot loader, passing a NULL pointer allows the static_env + * to be installed if it is configured. + */ void init_static_kenv(char *buf, size_t len) { - kern_envp = buf; - env_len = len; - env_pos = 0; + + if (envmode == 1) { + kern_envp = static_env; + env_len = len; + env_pos = len; + } else { + kern_envp = buf; + env_len = len; + env_pos = 0; + } } /* diff --git a/sys/sparc64/sparc64/machdep.c b/sys/sparc64/sparc64/machdep.c index dd6f31c..e49e449 100644 --- a/sys/sparc64/sparc64/machdep.c +++ b/sys/sparc64/sparc64/machdep.c @@ -383,7 +383,8 @@ sparc64_init(caddr_t mdp, u_long o1, u_long o2, u_long o3, ofw_vec_t *vec) kmdp = preload_search_by_type("elf kernel"); if (kmdp != NULL) { boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int); - kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *); + init_static_kenv(MD_FETCH(kmdp, MODINFOMD_ENVP, char *), + 0); end = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t); kernel_tlb_slots = MD_FETCH(kmdp, MODINFOMD_DTLB_SLOTS, int); |
