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File tzdata-update.c of Package eglibc
#ifdef __sparc__ register void *__thread_self __asm ("g7"); #endif #define _GNU_SOURCE 1 #include <errno.h> #include <fcntl.h> #include <stdlib.h> #include <string.h> #include <syscall.h> #include <unistd.h> #if defined __i386__ # define INTERNAL_SYSCALL_DECL(err) do { } while (0) # define INTERNAL_SYSCALL(name, err, nr, args...) \ ({ \ register unsigned int resultvar; \ asm volatile ( \ "movl %1, %%eax\n\t" \ "int $0x80\n\t" \ : "=a" (resultvar) \ : "i" (__NR_##name) ASMFMT_##nr(args) : "memory", "cc"); \ (int) resultvar; }) # define INTERNAL_SYSCALL_ERROR_P(val, err) \ ((unsigned int) (val) >= 0xfffff001u) # define ASMFMT_0() # define ASMFMT_1(arg1) \ , "b" (arg1) # define ASMFMT_2(arg1, arg2) \ , "b" (arg1), "c" (arg2) # define ASMFMT_3(arg1, arg2, arg3) \ , "b" (arg1), "c" (arg2), "d" (arg3) #elif defined __x86_64__ # define INTERNAL_SYSCALL_DECL(err) do { } while (0) # define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \ ({ \ unsigned long resultvar; \ LOAD_ARGS_##nr (args) \ LOAD_REGS_##nr \ asm volatile ( \ "syscall\n\t" \ : "=a" (resultvar) \ : "0" (name) ASM_ARGS_##nr : "memory", "cc", "r11", "cx"); \ (long) resultvar; }) # define INTERNAL_SYSCALL(name, err, nr, args...) \ INTERNAL_SYSCALL_NCS (__NR_##name, err, nr, ##args) # define INTERNAL_SYSCALL_ERROR_P(val, err) \ ((unsigned long) (val) >= -4095L) # define LOAD_ARGS_0() # define LOAD_REGS_0 # define ASM_ARGS_0 # define LOAD_ARGS_1(a1) \ long int __arg1 = (long) (a1); \ LOAD_ARGS_0 () # define LOAD_REGS_1 \ register long int _a1 asm ("rdi") = __arg1; \ LOAD_REGS_0 # define ASM_ARGS_1 ASM_ARGS_0, "r" (_a1) # define LOAD_ARGS_2(a1, a2) \ long int __arg2 = (long) (a2); \ LOAD_ARGS_1 (a1) # define LOAD_REGS_2 \ register long int _a2 asm ("rsi") = __arg2; \ LOAD_REGS_1 # define ASM_ARGS_2 ASM_ARGS_1, "r" (_a2) # define LOAD_ARGS_3(a1, a2, a3) \ long int __arg3 = (long) (a3); \ LOAD_ARGS_2 (a1, a2) # define LOAD_REGS_3 \ register long int _a3 asm ("rdx") = __arg3; \ LOAD_REGS_2 # define ASM_ARGS_3 ASM_ARGS_2, "r" (_a3) #elif defined __powerpc__ # define INTERNAL_SYSCALL_DECL(err) long int err # define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \ ({ \ register long int r0 __asm__ ("r0"); \ register long int r3 __asm__ ("r3"); \ register long int r4 __asm__ ("r4"); \ register long int r5 __asm__ ("r5"); \ register long int r6 __asm__ ("r6"); \ register long int r7 __asm__ ("r7"); \ register long int r8 __asm__ ("r8"); \ LOADARGS_##nr(name, args); \ __asm__ __volatile__ \ ("sc\n\t" \ "mfcr %0\n\t" \ : "=&r" (r0), \ "=&r" (r3), "=&r" (r4), "=&r" (r5), \ "=&r" (r6), "=&r" (r7), "=&r" (r8) \ : ASM_INPUT_##nr \ : "r9", "r10", "r11", "r12", \ "cr0", "ctr", "memory"); \ err = r0; \ (int) r3; \ }) # define INTERNAL_SYSCALL(name, err, nr, args...) \ INTERNAL_SYSCALL_NCS (__NR_##name, err, nr, ##args) # define INTERNAL_SYSCALL_ERROR_P(val, err) \ ((void) (val), __builtin_expect ((err) & (1 << 28), 0)) # define LOADARGS_0(name, dummy) \ r0 = name # define LOADARGS_1(name, __arg1) \ long int arg1 = (long int) (__arg1); \ LOADARGS_0(name, 0); \ r3 = arg1 # define LOADARGS_2(name, __arg1, __arg2) \ long int arg2 = (long int) (__arg2); \ LOADARGS_1(name, __arg1); \ r4 = arg2 # define LOADARGS_3(name, __arg1, __arg2, __arg3) \ long int arg3 = (long int) (__arg3); \ LOADARGS_2(name, __arg1, __arg2); \ r5 = arg3 # define ASM_INPUT_0 "0" (r0) # define ASM_INPUT_1 ASM_INPUT_0, "1" (r3) # define ASM_INPUT_2 ASM_INPUT_1, "2" (r4) # define ASM_INPUT_3 ASM_INPUT_2, "3" (r5) #elif defined __ia64__ # define DO_INLINE_SYSCALL_NCS(name, nr, args...) \ LOAD_ARGS_##nr (args) \ register long _r8 asm ("r8"); \ register long _r10 asm ("r10"); \ register long _r15 asm ("r15") = name; \ long _retval; \ LOAD_REGS_##nr \ __asm __volatile ("break 0x100000;;" \ : "=r" (_r8), "=r" (_r10), "=r" (_r15) \ ASM_OUTARGS_##nr \ : "2" (_r15) ASM_ARGS_##nr \ : "memory" ASM_CLOBBERS_##nr); \ _retval = _r8; # define INTERNAL_SYSCALL_DECL(err) long int err # define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \ ({ \ DO_INLINE_SYSCALL_NCS (name, nr, args) \ err = _r10; \ _retval; }) # define INTERNAL_SYSCALL(name, err, nr, args...) \ INTERNAL_SYSCALL_NCS (__NR_##name, err, nr, ##args) # define INTERNAL_SYSCALL_ERROR_P(val, err) (err == -1) # define LOAD_ARGS_0() # define LOAD_REGS_0 # define LOAD_ARGS_1(a1) \ long _arg1 = (long) (a1); \ LOAD_ARGS_0 () # define LOAD_REGS_1 \ register long _out0 asm ("out0") = _arg1; \ LOAD_REGS_0 # define LOAD_ARGS_2(a1, a2) \ long _arg2 = (long) (a2); \ LOAD_ARGS_1 (a1) # define LOAD_REGS_2 \ register long _out1 asm ("out1") = _arg2; \ LOAD_REGS_1 # define LOAD_ARGS_3(a1, a2, a3) \ long _arg3 = (long) (a3); \ LOAD_ARGS_2 (a1, a2) # define LOAD_REGS_3 \ register long _out2 asm ("out2") = _arg3; \ LOAD_REGS_2 # define ASM_OUTARGS_0 # define ASM_OUTARGS_1 ASM_OUTARGS_0, "=r" (_out0) # define ASM_OUTARGS_2 ASM_OUTARGS_1, "=r" (_out1) # define ASM_OUTARGS_3 ASM_OUTARGS_2, "=r" (_out2) # define ASM_ARGS_0 # define ASM_ARGS_1 ASM_ARGS_0, "3" (_out0) # define ASM_ARGS_2 ASM_ARGS_1, "4" (_out1) # define ASM_ARGS_3 ASM_ARGS_2, "5" (_out2) # define ASM_CLOBBERS_0 ASM_CLOBBERS_1, "out0" # define ASM_CLOBBERS_1 ASM_CLOBBERS_2, "out1" # define ASM_CLOBBERS_2 ASM_CLOBBERS_3, "out2" # define ASM_CLOBBERS_3 ASM_CLOBBERS_4, "out3" # define ASM_CLOBBERS_4 ASM_CLOBBERS_5, "out4" # define ASM_CLOBBERS_5 ASM_CLOBBERS_6, "out5" # define ASM_CLOBBERS_6_COMMON , "out6", "out7", \ /* Non-stacked integer registers, minus r8, r10, r15. */ \ "r2", "r3", "r9", "r11", "r12", "r13", "r14", "r16", "r17", "r18", \ "r19", "r20", "r21", "r22", "r23", "r24", "r25", "r26", "r27", \ "r28", "r29", "r30", "r31", \ /* Predicate registers. */ \ "p6", "p7", "p8", "p9", "p10", "p11", "p12", "p13", "p14", "p15", \ /* Non-rotating fp registers. */ \ "f6", "f7", "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", \ /* Branch registers. */ \ "b6" # define ASM_CLOBBERS_6 ASM_CLOBBERS_6_COMMON , "b7" #elif defined __s390__ # define INTERNAL_SYSCALL_DECL(err) do { } while (0) # define INTERNAL_SYSCALL_DIRECT(name, err, nr, args...) \ ({ \ DECLARGS_##nr(args) \ register long _ret asm("2"); \ asm volatile ( \ "svc %b1\n\t" \ : "=d" (_ret) \ : "i" (__NR_##name) ASMFMT_##nr \ : "memory" ); \ _ret; }) # define INTERNAL_SYSCALL_SVC0(name, err, nr, args...) \ ({ \ DECLARGS_##nr(args) \ register unsigned long _nr asm("1") = (unsigned long)(__NR_##name); \ register long _ret asm("2"); \ asm volatile ( \ "svc 0\n\t" \ : "=d" (_ret) \ : "d" (_nr) ASMFMT_##nr \ : "memory" ); \ _ret; }) # define INTERNAL_SYSCALL(name, err, nr, args...) \ (((__NR_##name) < 256) ? \ INTERNAL_SYSCALL_DIRECT(name, err, nr, args) : \ INTERNAL_SYSCALL_SVC0(name, err,nr, args)) # define INTERNAL_SYSCALL_ERROR_P(val, err) \ ((unsigned long) (val) >= -4095UL) # define DECLARGS_0() # define DECLARGS_1(arg1) \ register unsigned long gpr2 asm ("2") = (unsigned long)(arg1); # define DECLARGS_2(arg1, arg2) \ DECLARGS_1(arg1) \ register unsigned long gpr3 asm ("3") = (unsigned long)(arg2); # define DECLARGS_3(arg1, arg2, arg3) \ DECLARGS_2(arg1, arg2) \ register unsigned long gpr4 asm ("4") = (unsigned long)(arg3); # define ASMFMT_0 # define ASMFMT_1 , "0" (gpr2) # define ASMFMT_2 , "0" (gpr2), "d" (gpr3) # define ASMFMT_3 , "0" (gpr2), "d" (gpr3), "d" (gpr4) #elif defined __sparc__ # ifndef __arch64__ # define __INTERNAL_SYSCALL_STRING \ "ta 0x10;" \ "bcs,a 1f;" \ " sub %%g0, %%o0, %%o0;" \ "1:" # define __SYSCALL_CLOBBERS "g2", "g3", "g4", "g5", "g6", \ "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", \ "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", \ "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23", \ "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31", \ "cc", "memory" # else # define __INTERNAL_SYSCALL_STRING \ "ta 0x6d;" \ "bcs,a,pt %%xcc, 1f;" \ " sub %%g0, %%o0, %%o0;" \ "1:" # define __SYSCALL_CLOBBERS "g2", "g3", "g4", "g5", "g6", \ "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", \ "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", \ "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23", \ "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31", \ "f32", "f34", "f36", "f38", "f40", "f42", "f44", "f46", \ "f48", "f50", "f52", "f54", "f56", "f58", "f60", "f62", \ "cc", "memory" # endif #define INTERNAL_SYSCALL_DECL(err) do { } while (0) #define INTERNAL_SYSCALL(name, err, nr, args...) \ inline_syscall##nr(__INTERNAL_SYSCALL_STRING, __NR_##name, args) #define INTERNAL_SYSCALL_ERROR_P(val, err) \ ((unsigned long) (val) >= -515L) # define inline_syscall0(string,name,dummy...) \ ({ \ register long __o0 __asm__ ("o0"); \ register long __g1 __asm__ ("g1") = name; \ __asm __volatile (string : "=r" (__g1), "=r" (__o0) : \ "0" (__g1) : \ __SYSCALL_CLOBBERS); \ __o0; \ }) # define inline_syscall1(string,name,arg1) \ ({ \ register long __o0 __asm__ ("o0") = (long)(arg1); \ register long __g1 __asm__ ("g1") = name; \ __asm __volatile (string : "=r" (__g1), "=r" (__o0) : \ "0" (__g1), "1" (__o0) : \ __SYSCALL_CLOBBERS); \ __o0; \ }) # define inline_syscall2(string,name,arg1,arg2) \ ({ \ register long __o0 __asm__ ("o0") = (long)(arg1); \ register long __o1 __asm__ ("o1") = (long)(arg2); \ register long __g1 __asm__ ("g1") = name; \ __asm __volatile (string : "=r" (__g1), "=r" (__o0) : \ "0" (__g1), "1" (__o0), "r" (__o1) : \ __SYSCALL_CLOBBERS); \ __o0; \ }) # define inline_syscall3(string,name,arg1,arg2,arg3) \ ({ \ register long __o0 __asm__ ("o0") = (long)(arg1); \ register long __o1 __asm__ ("o1") = (long)(arg2); \ register long __o2 __asm__ ("o2") = (long)(arg3); \ register long __g1 __asm__ ("g1") = name; \ __asm __volatile (string : "=r" (__g1), "=r" (__o0) : \ "0" (__g1), "1" (__o0), "r" (__o1), \ "r" (__o2) : \ __SYSCALL_CLOBBERS); \ __o0; \ }) #elif defined __alpha__ # define INTERNAL_SYSCALL(name, err_out, nr, args...) \ INTERNAL_SYSCALL1(name, err_out, nr, args) # define INTERNAL_SYSCALL1(name, err_out, nr, args...) \ INTERNAL_SYSCALL_NCS(__NR_##name, err_out, nr, args) # define INTERNAL_SYSCALL_NCS(name, err_out, nr, args...) \ ({ \ long _sc_ret, _sc_err; \ inline_syscall##nr(name, args); \ err_out = _sc_err; \ _sc_ret; \ }) # define INTERNAL_SYSCALL_DECL(err) long int err # define INTERNAL_SYSCALL_ERROR_P(val, err) err # define inline_syscall_clobbers \ "$1", "$2", "$3", "$4", "$5", "$6", "$7", "$8", \ "$22", "$23", "$24", "$25", "$27", "$28", "memory" # define inline_syscall_r0_asm # define inline_syscall_r0_out_constraint "=v" # define inline_syscall0(name, args...) \ { \ register long _sc_0 inline_syscall_r0_asm; \ register long _sc_19 __asm__("$19"); \ \ _sc_0 = name; \ __asm__ __volatile__ \ ("callsys # %0 %1 <= %2" \ : inline_syscall_r0_out_constraint (_sc_0), \ "=r"(_sc_19) \ : "0"(_sc_0) \ : inline_syscall_clobbers, \ "$16", "$17", "$18", "$20", "$21"); \ _sc_ret = _sc_0, _sc_err = _sc_19; \ } # define inline_syscall1(name,arg1) \ { \ register long _sc_0 inline_syscall_r0_asm; \ register long _sc_16 __asm__("$16"); \ register long _sc_19 __asm__("$19"); \ \ _sc_0 = name; \ _sc_16 = (long) (arg1); \ __asm__ __volatile__ \ ("callsys # %0 %1 <= %2 %3" \ : inline_syscall_r0_out_constraint (_sc_0), \ "=r"(_sc_19), "=r"(_sc_16) \ : "0"(_sc_0), "2"(_sc_16) \ : inline_syscall_clobbers, \ "$17", "$18", "$20", "$21"); \ _sc_ret = _sc_0, _sc_err = _sc_19; \ } # define inline_syscall2(name,arg1,arg2) \ { \ register long _sc_0 inline_syscall_r0_asm; \ register long _sc_16 __asm__("$16"); \ register long _sc_17 __asm__("$17"); \ register long _sc_19 __asm__("$19"); \ \ _sc_0 = name; \ _sc_16 = (long) (arg1); \ _sc_17 = (long) (arg2); \ __asm__ __volatile__ \ ("callsys # %0 %1 <= %2 %3 %4" \ : inline_syscall_r0_out_constraint (_sc_0), \ "=r"(_sc_19), "=r"(_sc_16), "=r"(_sc_17) \ : "0"(_sc_0), "2"(_sc_16), "3"(_sc_17) \ : inline_syscall_clobbers, \ "$18", "$20", "$21"); \ _sc_ret = _sc_0, _sc_err = _sc_19; \ } # define inline_syscall3(name,arg1,arg2,arg3) \ { \ register long _sc_0 inline_syscall_r0_asm; \ register long _sc_16 __asm__("$16"); \ register long _sc_17 __asm__("$17"); \ register long _sc_18 __asm__("$18"); \ register long _sc_19 __asm__("$19"); \ \ _sc_0 = name; \ _sc_16 = (long) (arg1); \ _sc_17 = (long) (arg2); \ _sc_18 = (long) (arg3); \ __asm__ __volatile__ \ ("callsys # %0 %1 <= %2 %3 %4 %5" \ : inline_syscall_r0_out_constraint (_sc_0), \ "=r"(_sc_19), "=r"(_sc_16), "=r"(_sc_17), \ "=r"(_sc_18) \ : "0"(_sc_0), "2"(_sc_16), "3"(_sc_17), \ "4"(_sc_18) \ : inline_syscall_clobbers, "$20", "$21"); \ _sc_ret = _sc_0, _sc_err = _sc_19; \ } #elif defined __arm__ && defined __ARM_EABI__ # define INTERNAL_SYSCALL_DECL(err) do { } while (0) # define INTERNAL_SYSCALL(name, err, nr, args...) \ ({ \ register int _r0 __asm__("r0"); \ register int _nr __asm__("r7"); \ LOAD_ARGS_##nr(args) \ _nr = __NR_##name; \ asm volatile ("swi\t0\t@ syscall " #name "\n\t" \ : "=r" (_r0) \ : "r" (_nr) ASM_ARGS_##nr \ : "memory"); \ _r0; }) # define INTERNAL_SYSCALL_ERROR_P(val, err) \ ((unsigned int) (val) >= 0xfffff001u) # define ASM_ARGS_0 # define ASM_ARGS_1 , "r" (_r0) # define ASM_ARGS_2 , "r" (_r0), "r" (_r1) # define ASM_ARGS_3 , "r" (_r0), "r" (_r1), "r" (_r2) # define LOAD_ARGS_0() # define LOAD_ARGS_1(r0) \ _r0 = (int)r0; # define LOAD_ARGS_2(r0, r1) \ _r0 = (int)r0; \ register int _r1 __asm__("r1") = (int)r1; # define LOAD_ARGS_3(r0, r1, r2) \ _r0 = (int)r0; \ register int _r1 __asm__("r1") = (int)r1; \ register int _r2 __asm__("r2") = (int)r2; #endif char buffer[32768], data[32768]; size_t datasize; char zonename[1024]; static int simple_memcmp (const char *s1, const char *s2, size_t n) { int ret = 0; while (n-- && (ret = *(unsigned char *) s1++ - *(unsigned char *) s2++) == 0); return ret; } ssize_t readall (int fd, void *buf, size_t len) { INTERNAL_SYSCALL_DECL (err); size_t n = len; ssize_t ret; do { ret = INTERNAL_SYSCALL (read, err, 3, fd, buf, n); if (INTERNAL_SYSCALL_ERROR_P (ret, err)) { ret = -1; break; } else if (ret == 0) break; buf = (char *) buf + ret; n -= ret; } while (n > 0); return ret < 0 ? ret : (ssize_t) (len - n); } ssize_t writeall (int fd, const void *buf, size_t len) { INTERNAL_SYSCALL_DECL (err); size_t n = len; ssize_t ret; do { ret = INTERNAL_SYSCALL (write, err, 3, fd, buf, n); if (INTERNAL_SYSCALL_ERROR_P (ret, err)) { ret = -1; break; } else if (ret == 0) break; buf = (const char *) buf + ret; n -= ret; } while (n > 0); return ret < 0 ? ret : (ssize_t) (len - n); } void update (const char *filename) { INTERNAL_SYSCALL_DECL (err); long int fd = INTERNAL_SYSCALL (open, err, 2, filename, O_RDONLY); if (INTERNAL_SYSCALL_ERROR_P (fd, err)) return; ssize_t ret = readall (fd, buffer, sizeof (buffer)); INTERNAL_SYSCALL (close, err, 1, fd); if (ret <= 0 || (size_t) ret == sizeof (buffer)) return; /* Don't update the file unnecessarily. */ if ((size_t) ret == datasize && simple_memcmp (buffer, data, datasize) == 0) return; size_t len = strlen (filename); char tempfilename[len + sizeof (".tzupdate")]; memcpy (tempfilename, filename, len); memcpy (tempfilename + len, ".tzupdate", sizeof (".tzupdate")); fd = INTERNAL_SYSCALL (open, err, 3, tempfilename, O_WRONLY | O_CREAT | O_EXCL, 0600); if (INTERNAL_SYSCALL_ERROR_P (fd, err)) return; if (writeall (fd, data, datasize) != datasize) { clean_up: INTERNAL_SYSCALL (unlink, err, 1, tempfilename); INTERNAL_SYSCALL (close, err, 1, fd); return; } long int sret; sret = INTERNAL_SYSCALL (fchmod, err, 2, fd, 0644); if (INTERNAL_SYSCALL_ERROR_P (sret, err)) goto clean_up; INTERNAL_SYSCALL (close, err, 1, fd); sret = INTERNAL_SYSCALL (rename, err, 2, tempfilename, filename); if (INTERNAL_SYSCALL_ERROR_P (sret, err)) INTERNAL_SYSCALL (unlink, err, 1, tempfilename); } static char * simple_strchr (const char *s, int c) { for (; *s != (char) c; ++s) if (*s == '\0') return NULL; return (char *) s; } int main (int argc, char **argv) { INTERNAL_SYSCALL_DECL (err); long int fd = INTERNAL_SYSCALL (open, err, 2, "/etc/sysconfig/clock", O_RDONLY); if (INTERNAL_SYSCALL_ERROR_P (fd, err)) return 0; ssize_t ret = readall (fd, buffer, sizeof (buffer) - 1); INTERNAL_SYSCALL (close, err, 1, fd); if (ret <= 0 || (size_t) ret == sizeof (buffer) - 1) return 0; char *p = buffer; while (p != NULL) { while (*p == ' ' || *p == '\t') p++; if (simple_memcmp (p, "ZONE", 4) == 0) { p += 4; while (*p == ' ' || *p == '\t') p++; if (*p == '=') { p++; while (*p == ' ' || *p == '\t') p++; if (*p == '"') p++; char *q = p; while (simple_strchr (" \t\n\"", *p) == NULL) p++; const char path[] = "/usr/share/zoneinfo/"; if (p - q >= sizeof (zonename) - sizeof (path)) return 0; memcpy (zonename, path, sizeof (path) - 1); memcpy (zonename + sizeof (path) - 1, q, p - q); break; } } p = simple_strchr (p, '\n'); if (p) p++; } if (*zonename == '\0') return 0; fd = INTERNAL_SYSCALL (open, err, 2, zonename, O_RDONLY); if (INTERNAL_SYSCALL_ERROR_P (fd, err)) return 0; ret = readall (fd, data, sizeof (data)); INTERNAL_SYSCALL (close, err, 1, fd); if (ret <= 0 || (size_t) ret == sizeof (data)) return 0; datasize = (size_t) ret; update ("/etc/localtime"); update ("/var/spool/postfix/etc/localtime"); return 0; } int __libc_multiple_threads __attribute__((nocommon)); int __libc_enable_asynccancel (void) { return 0; } void __libc_disable_asynccancel (int x) { } void __libc_csu_init (void) { } void __libc_csu_fini (void) { } pid_t __fork (void) { return -1; } char thr_buf[65536]; #if defined __arm__ /* Prevent pulling in libc-start.o (which also defines * __libc_start_main.) */ unsigned int __stack_chk_guard = ~0U; #endif #ifndef __powerpc__ int __libc_start_main (int (*main) (int argc, char **argv), int argc, char **argv, void (*init) (void), void (*fini) (void), void (*rtld_fini) (void), void * stack_end) #else struct startup_info { void *sda_base; int (*main) (int, char **, char **, void *); int (*init) (int, char **, char **, void *); void (*fini) (void); }; int __libc_start_main (int argc, char **argv, char **ev, void *auxvec, void (*rtld_fini) (void), struct startup_info *stinfo, char **stack_on_entry) #endif { #if defined __ia64__ || defined __powerpc64__ register void *r13 __asm ("r13") = thr_buf + 32768; __asm ("" : : "r" (r13)); #elif defined __sparc__ register void *g6 __asm ("g6") = thr_buf + 32768; __thread_self = thr_buf + 32768; __asm ("" : : "r" (g6), "r" (__thread_self)); #elif defined __s390__ && !defined __s390x__ __asm ("sar %%a0,%0" : : "d" (thr_buf + 32768)); #elif defined __s390x__ __asm ("sar %%a1,%0; srlg 0,%0,32; sar %%a0,0" : : "d" (thr_buf + 32768) : "0"); #elif defined __powerpc__ && !defined __powerpc64__ register void *r2 __asm ("r2") = thr_buf + 32768; __asm ("" : : "r" (r2)); #endif #ifdef __powerpc__ argc = (long)*stack_on_entry; argv = stack_on_entry + 1; #endif long ret = main (argc, argv); INTERNAL_SYSCALL_DECL (err); INTERNAL_SYSCALL (exit, err, 1, ret); return 110; }
