diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/alpha/init-first.h')
| -rw-r--r-- | sysdeps/unix/sysv/linux/alpha/init-first.h | 39 |
1 files changed, 28 insertions, 11 deletions
diff --git a/sysdeps/unix/sysv/linux/alpha/init-first.h b/sysdeps/unix/sysv/linux/alpha/init-first.h index c27c589a28..ffbcaf1521 100644 --- a/sysdeps/unix/sysv/linux/alpha/init-first.h +++ b/sysdeps/unix/sysv/linux/alpha/init-first.h @@ -1,12 +1,29 @@ -/* This fragment is invoked in the stack context of program start. - Its job is to set up a pointer to argc as an argument, pass - control to `INIT', and, if necessary, clean up after the call - to leave the stack in the same condition it was found in. */ +/* The job of this fragment it to find argc and friends for INIT. + 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) \ - asm(".globl " #NAME "\n" \ - #NAME ":\n\t" \ - "ldgp $29, 0($27)\n\t" \ - ".prologue 1\n\t" \ - "mov $30, $16\n\t" \ - "br $31, " #INIT "..ng"); +#define SYSDEP_CALL_INIT(NAME, INIT) \ + asm(".weak _dl_starting_up\n\t" \ + ".globl " #NAME "\n\t" \ + ".ent " #NAME "\n" \ + #NAME ":\n\t" \ + "ldgp $29, 0($27)\n\t" \ + ".prologue 1\n\t" \ + ".set at\n\t" \ + /* Are we a dynamic libc being loaded into a static program? */ \ + "lda $0, _dl_starting_up\n\t" \ + "beq $0, 1f\n\t" \ + "ldl $0, 0($0)\n" \ + "cmpeq $31, $0, $0\n" \ + "1:\t" \ + "stl $0, __libc_multiple_libcs\n\t" \ + /* If so, argc et al are in a0-a2 already. Otherwise, load them. */ \ + "bne $0, 2f\n\t" \ + "ldl $16, 0($30)\n\t" \ + "lda $17, 8($30)\n\t" \ + "s8addq $16, $17, $18\n\t" \ + "addq $18, 8, $18\n" \ + "2:\t" \ + "br $31, " #INIT "..ng\n\t" \ + ".set noat\n\t" \ + ".end " #NAME); |