diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/sparc/sparc32/init-first.h')
| -rw-r--r-- | sysdeps/unix/sysv/linux/sparc/sparc32/init-first.h | 98 |
1 files changed, 71 insertions, 27 deletions
diff --git a/sysdeps/unix/sysv/linux/sparc/sparc32/init-first.h b/sysdeps/unix/sysv/linux/sparc/sparc32/init-first.h index 39822fc595..9bbe6bcdab 100644 --- a/sysdeps/unix/sysv/linux/sparc/sparc32/init-first.h +++ b/sysdeps/unix/sysv/linux/sparc/sparc32/init-first.h @@ -21,32 +21,76 @@ This is done in one of two ways: either in the stack context of program start, or having dlopen pass them in. */ -#define SYSDEP_CALL_INIT(NAME, INIT) \ -void NAME (void *arg) \ -{ \ - int argc; \ - char **argv, **envp; \ - /* The next variable is only here to work around a bug in gcc <= 2.7.2.2. \ - If the address would be taken inside the expression the optimizer \ - would try to be too smart and throws it away. Grrr. */ \ - int *dummy_addr = &_dl_starting_up; \ - \ - __libc_multiple_libcs = dummy_addr && !_dl_starting_up; \ - \ - if (!__libc_multiple_libcs) \ - { \ - argc = *(int *) arg; \ - argv = (char **) (arg + 4); \ - envp = &argv[argc+1]; \ - } \ - else \ - { \ - argc = (int) arg; \ - argv = ((char ***) &arg)[1]; \ - envp = ((char ***) &arg)[2]; \ - } \ - \ - INIT (argc, argv, envp); \ -} +#include <sysdep.h> +#define __S1(x) #x +#define __S(x) __S1(x) +#ifdef PIC + +#define SYSDEP_CALL_INIT(NAME, INIT) asm("\ + .weak _dl_starting_up + .global " #NAME " + .type " #NAME ",@function +" #NAME ": + save %sp, -64, %sp +1: call 11f + sethi %hi(_GLOBAL_OFFSET_TABLE_-(1b-.)), %l7 +11: or %l7, %lo(_GLOBAL_OFFSET_TABLE_-(1b-.)), %l7 + add %l7, %o7, %l7 + /* Are we a dynamic libc being loaded into a static program? */ + sethi %hi(_dl_starting_up), %l2 + or %l2, %lo(_dl_starting_up), %l2 + ld [%l7+%l2], %l2 + cmp %l2, 0 + beq 3f + sethi %hi(__libc_multiple_libcs), %l3 + ld [%l2], %l2 + subcc %g0, %l2, %g0 + subx %g0, -1, %l2 +3: or %l3, %lo(__libc_multiple_libcs), %l3 + ld [%l7+%l3], %l3 + cmp %l2, 0 + st %l2, [%l3] + /* If so, argc et al are in %o0-%o2 already. Otherwise, load them. */ + bnz " #INIT " + restore + ld [%sp+22*4], %o0 + add %sp, 23*4, %o1 + sll %o0, 2, %o2 + add %o2, %o1, %o2 + ba " #INIT " + add %o2, 4, %o2 + .size "#NAME ", .-" #NAME); + +#else + +#define SYSDEP_CALL_INIT(NAME, INIT) asm("\ + .weak _dl_starting_up + .global " #NAME " + .type " #NAME ",@function +" #NAME ": + /* Are we a dynamic libc being loaded into a static program? */ + sethi %hi(_dl_starting_up), %g2 + or %g2, %lo(_dl_starting_up), %g2 + cmp %g2, 0 + beq 3f + sethi %hi(__libc_multiple_libcs), %g3 + ld [%g4+%g2], %g2 + subcc %g0, %g2, %g0 + subx %g0, -1, %g2 +3: or %g3, %lo(__libc_multiple_libcs), %g3 + cmp %g2, 0 + st %g2, [%g3+%g4] + /* If so, argc et al are in %o0-%o2 already. Otherwise, load them. */ + bnz " #INIT " + nop + ld [%sp+22*4], %o0 + add %sp, 23*4, %o1 + sll %o0, 2, %o2 + add %o2, %o1, %o2 + ba " #INIT " + add %o2, 4, %o2 + .size "#NAME ", .-" #NAME); + +#endif |