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Diffstat (limited to 'lib/csu/powerpc64/md_init.h')
| -rw-r--r-- | lib/csu/powerpc64/md_init.h | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/lib/csu/powerpc64/md_init.h b/lib/csu/powerpc64/md_init.h new file mode 100644 index 00000000000..0b46df1d426 --- /dev/null +++ b/lib/csu/powerpc64/md_init.h @@ -0,0 +1,124 @@ +/* $OpenBSD: md_init.h,v 1.1 2020/06/25 04:09:39 drahn Exp $ */ + +/* + * Copyright (c) 2020 Dale Rahn <drahn@openbsd.org> + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#define MD_SECT_CALL_FUNC(section, func) \ + __asm (".section "#section", \"ax\" \n" \ + " bl " #func " \n" \ + " .previous") + +#define MD_SECTION_PROLOGUE(sect, entry_pt) \ + __asm ( \ + ".section "#sect",\"ax\",@progbits \n" \ + " .globl " #entry_pt " \n" \ + " .type " #entry_pt ",@function \n" \ + " .align 4 \n" \ + #entry_pt": \n" \ + ".L_"sect"_gep: \n" \ + " addis %r2, %r12, .TOC.-.L_"sect"_gep@ha \n" \ + " addi %r2, %r2, .TOC.-.L_"sect"_gep@l \n" \ + ".L_"sect"_lep: \n" \ + " .localentry " #entry_pt", .L_"sect"_lep-.L_"sect"_gep; \n" \ + " mflr %r0 \n" \ + " std %r0,16(%r1) \n" \ + " stdu %r1,-64(%r1) \n" \ + " /* fall thru */ \n" \ + " .previous") + + +#define MD_SECTION_EPILOGUE(sect) \ + __asm ( \ + ".section "#sect",\"ax\",@progbits \n" \ + " addi %r1,%r1,64 \n" \ + " ld %r0,16(%r1) \n" \ + " mtlr %r0 \n" \ + " blr \n" \ + " .previous") + +#include <sys/syscall.h> /* for SYS_mprotect */ + +#define STR(x) __STRING(x) + +#define MD_CRT0_START \ +__asm( \ +" .text \n" \ +" .section \".text\" \n" \ +" .align 2 \n" \ +" .globl _start \n" \ +" .type _start, @function \n" \ +" .globl __start \n" \ +" .type __start, @function \n" \ +"_start: \n" \ +"__start: \n" \ +" bl 1f \n" \ +"1: \n" \ +" mflr %r30 \n" \ +" addis %r2, %r30, .TOC.-1b@ha \n" \ +" addi %r2, %r2, .TOC.-1b@l \n" \ +" # put cleanup in r6 instead of r7 \n" \ +" mr %r6, %r7 \n" \ +" li %r7, 0 \n" \ +" stdu %r7, -64(%r1) \n" \ +" b ___start \n" \ +) + +#define MD_RCRT0_START \ +__asm( \ +" .text \n" \ +" .section \".text\" \n" \ +" .align 2 \n" \ +" .globl _start \n" \ +" .type _start, @function \n" \ +" .globl __start \n" \ +" .type __start, @function \n" \ +"_start: \n" \ +"__start: \n" \ +" bl 1f \n" \ +"1: \n" \ +" mflr %r31 \n" \ +" addis %r2, %r31, .TOC.-1b@ha \n" \ +" addi %r2, %r2, .TOC.-1b@l \n" \ +" stdu 1, (-48 -((9+3)*8))(%r1) # allocate dl_data \n" \ +" \n" \ +" # Preserve program parameters during setup \n" \ +" mr %r15, %r3 # argc \n" \ +" mr %r16, %r4 # argv \n" \ +" mr %r17, %r5 # envp \n" \ +" \n" \ +" addis %r14, %r2, _DYNAMIC@toc@ha \n" \ +" addi %r14, %r14, _DYNAMIC@toc@l \n" \ +" \n" \ +" subi %r3, %r16, 8 # pointer to argc on stack. \n" \ +" addi %r4, %r1, 48 # dl_data \n" \ +" mr %r5, %r14 # dynamicp \n" \ +" \n" \ +" bl _dl_boot_bind \n" \ +" \n" \ +" # restore program arguments \n" \ +" mr %r3, %r15 \n" \ +" mr %r4, %r30 \n" \ +" mr %r5, %r17 \n" \ +" li %r6, 0 \n" \ +" bl ___start \n" \ +" \n" \ +" .globl _dl_exit \n" \ +" .type _dl_exit, @function \n" \ +"_dl_exit: \n" \ +" li %r0, " STR(SYS_exit) " \n" \ +" sc \n" \ +" blr \n" \ +) |