diff options
Diffstat (limited to 'lib/csu')
| -rw-r--r-- | lib/csu/riscv64/md_init.h | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/lib/csu/riscv64/md_init.h b/lib/csu/riscv64/md_init.h new file mode 100644 index 00000000000..83d3b4502c3 --- /dev/null +++ b/lib/csu/riscv64/md_init.h @@ -0,0 +1,156 @@ +/* $OpenBSD: md_init.h,v 1.1 2021/04/28 00:11:11 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. + */ + +#ifdef __PIC__ +#define MD_SECT_CALL_FUNC(section, func) \ + __asm (".section "#section", \"ax\" \n" \ + "call " # func "@plt \n" \ +" .previous") +#else +#define MD_SECT_CALL_FUNC(section, func) \ + __asm (".section "#section", \"ax\" \n" \ + "call " # func " \n" \ +" .previous") +#endif + +#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" \ + " addi sp, sp, -16 \n" \ + " sd ra,8(sp) \n" \ + " sd s0,0(sp) \n" \ + " addi s0, sp, 16 \n" \ + " /* fall thru */ \n" \ + " .previous") + + +#define MD_SECTION_EPILOGUE(sect) \ + __asm ( \ + ".section "#sect",\"ax\",%progbits \n" \ + " ld ra, 8(sp) \n" \ + " ld s0, 0(sp) \n" \ + " addi sp, sp, 16 \n" \ + " jr ra \n" \ + " .previous") + + +#define MD_CRT0_START \ + __asm( \ + ".text \n" \ + " .align 0 \n" \ + " .globl _start \n" \ + " .globl __start \n" \ + " .type _start, @function \n" \ + " .type __start, @function \n" \ + "_start: \n" \ + "__start: \n" \ + " mv a3, a2 # cleanup \n" \ + "/* Get argc/argv/envp from stack */ \n" \ + " ld a0, (sp) \n" \ + " addi a1, sp, 0x8 \n" \ + " slli t0, a0, 0x3 \n" \ + " add a2, a1, t0 \n" \ + " addi a2, a2, 0x8 \n" \ + " \n" \ + " addi sp, sp, -16 \n" \ + " li t0, 0 \n" \ + " sd t0,(sp) \n" \ + " \n" \ + " j ___start \n" \ + " .size _start, .-_start \n" \ + " .size __start, .-__start \n" \ + ".previous"); + +#ifdef __PIC__ +#define MD_RCRT0_START \ + char **environ, *__progname; \ + __asm( \ + ".text \n" \ + " .align 0 \n" \ + " .globl _start \n" \ + " .globl __start \n" \ + " .type _start, @function \n" \ + " .type __start, @function \n" \ + "_start: \n" \ + "__start: \n" \ + " mv a0, sp \n" \ + " mv fp, sp \n" \ + " \n" \ + " addi sp, sp, -(8+8+(16*8)) \n" \ + " addi a1, sp, 4 \n" \ + " \n" \ + "1: auipc a2, %pcrel_hi(_DYNAMIC) \n" \ + " addi a2, a2, %pcrel_lo(1b) \n" \ + " \n" \ + " call _dl_boot_bind \n" \ + " \n" \ + " mv sp, fp \n" \ + " li fp, 0x0 \n" \ + " \n" \ + " li a3, 0x0 /* cleanup */ \n" \ + "/* Get argc/argv/envp from stack */ \n" \ + " ld a0, (sp) \n" \ + " addi a1, sp, 0x0008 \n" \ + " slli a2, a0, 0x3 \n" \ + " add a2, a1, a2 \n" \ + " addi a2, a2, 0x0008 \n" \ + " \n" \ + " j ___start \n" \ + " .size _start, .-_start \n" \ + " .size __start, .-__start \n" \ + "_dl_exit: \n" \ + " li t0, " STR(SYS_exit) " \n" \ + " ecall \n" \ + " unimp \n" \ + ".previous"); +#else /* non-pic/pie */ +#define MD_RCRT0_START \ + char **environ, *__progname; \ + __asm( \ + ".text \n" \ + " .align 0 \n" \ + " .globl _start \n" \ + " .globl __start \n" \ + " .type _start, @function \n" \ + " .type __start, @function \n" \ + "_start: \n" \ + "__start: \n" \ + " mv a0, sp \n" \ + " li fp, 0x0 \n" \ + " \n" \ + " li a3, 0x0 /* cleanup */ \n" \ + "/* Get argc/argv/envp from stack */ \n" \ + " ld a0, (sp) \n" \ + " addi a1, sp, 0x0008 \n" \ + " slli a2, a0, 0x3 \n" \ + " add a2, a1, a2 \n" \ + " addi a2, a2, 0x0008 \n" \ + " \n" \ + " j ___start \n" \ + " .size _start, .-_start \n" \ + " .size __start, .-__start \n" \ + "_dl_exit: \n" \ + " li t0, " STR(SYS_exit) " \n" \ + " ecall \n" \ + " unimp \n" \ + + ".previous"); +#endif |