Add support for __FreeBSD_kernel__ kernel

Add support for kfreebsd-i386 and kfreebsd-amd64 Debian arch with
thanks to Pierre Chifflier <chifflier@cpe.fr>.

lib/bcheck.c

@@ -21,7 +21,8 @@
 #include <stdio.h>
 #include <stdarg.h>
 #include <string.h>
-#if !defined(__FreeBSD__) && !defined(__DragonFly__) && !defined(__OpenBSD__)
+#if !defined(__FreeBSD__) && !defined(__FreeBSD_kernel__) \
+    && !defined(__DragonFly__) && !defined(__OpenBSD__)
 #include <malloc.h>
 #endif
 
@@ -35,7 +36,8 @@
 #define CONFIG_TCC_MALLOC_HOOKS
 #define HAVE_MEMALIGN
 
-#if defined(__FreeBSD__) || defined(__DragonFly__) || defined(__dietlibc__) \
+#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) \
+    || defined(__DragonFly__) || defined(__dietlibc__) \
     || defined(__UCLIBC__) || defined(__OpenBSD__) || defined(_WIN32)
 #warning Bound checking does not support malloc (etc.) in this environment.
 #undef CONFIG_TCC_MALLOC_HOOKS

libtcc.c

@@ -943,6 +943,9 @@ LIBTCCAPI TCCState *tcc_new(void)
     tcc_define_symbol(s, "__FreeBSD__", str( __FreeBSD__));
 #undef str
 #endif
+#if defined(__FreeBSD_kernel__)
+    tcc_define_symbol(s, "__FreeBSD_kernel__", NULL);
+#endif
 #if defined(__linux)
     tcc_define_symbol(s, "__linux__", NULL);
     tcc_define_symbol(s, "__linux", NULL);

tcc.h

@@ -808,7 +808,8 @@ enum tcc_token {
   #define strtof (float)strtod
   #define strtoll (long long)strtol
 #endif
-#elif defined(TCC_UCLIBC) || defined(__FreeBSD__) || defined(__DragonFly__) \
+#elif defined(TCC_UCLIBC) || defined(__FreeBSD__) \
+    || defined(__FreeBSD_kernel__) || defined(__DragonFly__) \
     || defined(__OpenBSD__)
 /* currently incorrect */
 static inline long double strtold(const char *nptr, char **endptr)

tccelf.c

@@ -1332,6 +1332,8 @@ ST_FUNC void tcc_add_linker_symbols(TCCState *s1)
 /* name of ELF interpreter */
 #if defined __FreeBSD__
 static const char elf_interp[] = "/libexec/ld-elf.so.1";
+#elif defined __FreeBSD_kernel__
+static char elf_interp[] = "/lib/ld.so.1";
 #elif defined TCC_ARM_EABI
 static const char elf_interp[] = "/lib/ld-linux.so.3";
 #elif defined(TCC_TARGET_X86_64)
@@ -1368,7 +1370,7 @@ static void tcc_output_binary(TCCState *s1, FILE *f,
     }
 }
 
-#if defined(__FreeBSD__)
+#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 #define	HAVE_PHDR	1
 #define	EXTRA_RELITEMS	14
 
@@ -1851,7 +1853,7 @@ static int elf_output_file(TCCState *s1, const char *filename)
                     }
                     /* update dynamic relocation infos */
                     if (s->sh_type == SHT_RELX) {
-#if defined(__FreeBSD__)
+#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
                         if (!strcmp(strsec->data + s->sh_name, ".rel.got")) { // rel_size == 0) {
                             rel_addr = addr;
 			    rel_size += s->sh_size;	// XXX only first rel.
@@ -1892,7 +1894,7 @@ static int elf_output_file(TCCState *s1, const char *filename)
         if (interp) {
             ph = &phdr[0];
 
-#if defined(__FreeBSD__)
+#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 	    {
 		int len = phnum * sizeof(ElfW(Phdr));
 
@@ -2007,7 +2009,7 @@ static int elf_output_file(TCCState *s1, const char *filename)
             put_dt(dynamic, DT_RELASZ, rel_size);
             put_dt(dynamic, DT_RELAENT, sizeof(ElfW_Rel));
 #else
-#if defined(__FreeBSD__)
+#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
             put_dt(dynamic, DT_PLTGOT, s1->got->sh_addr);
             put_dt(dynamic, DT_PLTRELSZ, rel_size);
             put_dt(dynamic, DT_JMPREL, rel_addr);
@@ -2115,7 +2117,7 @@ static int elf_output_file(TCCState *s1, const char *filename)
         ehdr.e_ident[4] = TCC_ELFCLASS;
         ehdr.e_ident[5] = ELFDATA2LSB;
         ehdr.e_ident[6] = EV_CURRENT;
-#ifdef __FreeBSD__
+#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
         ehdr.e_ident[EI_OSABI] = ELFOSABI_FREEBSD;
 #endif
 #ifdef TCC_TARGET_ARM
@@ -2153,7 +2155,7 @@ static int elf_output_file(TCCState *s1, const char *filename)
         for(i=1;i<s1->nb_sections;i++) {
             s = s1->sections[section_order[i]];
             if (s->sh_type != SHT_NOBITS) {
-#if defined(__FreeBSD__)
+#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 		if (s->sh_type == SHT_DYNSYM)
 		    patch_dynsym_undef(s1, s);
 #endif

tccrun.c

@@ -438,7 +438,7 @@ static int rt_get_caller_pc(unsigned long *paddr, ucontext_t *uc, int level)
     int i;
 
     if (level == 0) {
-#if defined(__FreeBSD__)
+#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
         *paddr = uc->uc_mcontext.mc_eip;
 #elif defined(__dietlibc__)
         *paddr = uc->uc_mcontext.eip;
@@ -447,7 +447,7 @@ static int rt_get_caller_pc(unsigned long *paddr, ucontext_t *uc, int level)
 #endif
         return 0;
     } else {
-#if defined(__FreeBSD__)
+#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
         fp = uc->uc_mcontext.mc_ebp;
 #elif defined(__dietlibc__)
         fp = uc->uc_mcontext.ebp;
@@ -477,14 +477,14 @@ static int rt_get_caller_pc(unsigned long *paddr,
 
     if (level == 0) {
         /* XXX: only support linux */
-#if defined(__FreeBSD__)
+#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
         *paddr = uc->uc_mcontext.mc_rip;
 #else
         *paddr = uc->uc_mcontext.gregs[REG_RIP];
 #endif
         return 0;
     } else {
-#if defined(__FreeBSD__)
+#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
         fp = uc->uc_mcontext.mc_rbp;
 #else
         fp = uc->uc_mcontext.gregs[REG_RBP];