diff options
Diffstat (limited to 'sysdeps/ia64')
| -rw-r--r-- | sysdeps/ia64/elf/entry.h | 7 | ||||
| -rw-r--r-- | sysdeps/ia64/elf/start.S | 45 |
2 files changed, 38 insertions, 14 deletions
diff --git a/sysdeps/ia64/elf/entry.h b/sysdeps/ia64/elf/entry.h new file mode 100644 index 0000000000..53ea9a2297 --- /dev/null +++ b/sysdeps/ia64/elf/entry.h @@ -0,0 +1,7 @@ +#ifndef __ASSEMBLY__ +extern void _start (void); +#endif + +/* The function's entry point is stored in the first word of the + function descriptor (plabel) of _start(). */ +#define ENTRY_POINT (((long int *) _start)[0]) diff --git a/sysdeps/ia64/elf/start.S b/sysdeps/ia64/elf/start.S index 5ba6196e3c..cc8b798b37 100644 --- a/sysdeps/ia64/elf/start.S +++ b/sysdeps/ia64/elf/start.S @@ -17,6 +17,8 @@ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ +#include <sysdep.h> + #include <asm/unistd.h> #include <asm/fpu.h> @@ -31,10 +33,12 @@ * out6: stack_end */ - .global _start - .proc _start + .align 32 + .global _start + .proc _start _start: + .prologue { .mlx alloc r2 = ar.pfs,0,0,7,0 movl r3 = FPSR_DEFAULT @@ -44,38 +48,46 @@ _start: movl gp = @gprel(0f) ;; } -0: { .mii +0: { .mmi ld8 out1 = [out2], 8 /* load argc and move out2 to become argv */ + mov.m r10 = ar.bsp /* fetch rbs base address */ mov r9 = ip ;; + } + { .mii + mov ar.fpsr = r3 sub gp = r9, gp /* back-compute gp value */ + adds out6 = 16, sp /* highest non-environment stack address */ ;; } - { .mfi - mov ar.fpsr = r3 + { + addl r11 = @ltoff(__libc_ia64_register_backing_store_base), gp addl out0 = @ltoff(@fptr(main)), gp - } - { .mfi - addl out4 = @ltoff(@fptr(_fini)), gp addl out3 = @ltoff(@fptr(_init)), gp ;; } { .mmi + ld8 r3 = [r11] /* pointer to __libc_ia64_register_backing_store_base */ ld8 out0 = [out0] /* pointer to `main' function descriptor */ + addl out4 = @ltoff(@fptr(_fini)), gp + ;; + } + { .mmi ld8 out3 = [out3] /* pointer to `init' function descriptor */ - adds out6 = 16, sp /* highest non-environment stack address */ + ld8 out4 = [out4] /* pointer to `fini' function descriptor */ + .save rp, r4 + mov r4 = r0 /* terminate unwind chain with a NULL return-pointer */ } + .body { .mib - ld8 out4 = [out4] /* pointer to `fini' function descriptor */ + st8 [r3] = r10 mov out5 = ret0 /* dynamic linker destructor */ br.call.sptk.few rp = __libc_start_main } { .mib - mov rp = r0 - br.ret.sptk.few rp /* break miserably if we ever return */ - ;; + break 0 /* break miserably if we ever return */ } - .endp _start + .endp _start /* Define a symbol for the first piece of initialized data. */ .data @@ -84,3 +96,8 @@ __data_start: .long 0 .weak data_start data_start = __data_start + + .global __libc_ia64_register_backing_store_base + .align 8 +__libc_ia64_register_backing_store_base: + .space 8 |