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https://github.com/u-boot/u-boot.git
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nds32: Support relocation.
Enable pie option for relocation. Signed-off-by: rick <rick@andestech.com> Cc: Andes <uboot@andestech.com>
This commit is contained in:
rick
Andes
parent
06572f0301
commit
d607f6fa99
@ -19,4 +19,4 @@ PLATFORM_RELFLAGS += -fno-strict-aliasing -fno-common -mrelax
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PLATFORM_RELFLAGS += -gdwarf-2
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PLATFORM_CPPFLAGS += -D__nds32__ -G0 -ffixed-10 -fpie
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LDFLAGS_u-boot = --gc-sections --relax
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LDFLAGS_u-boot = --gc-sections --relax -pie
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@ -6,6 +6,8 @@
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* SPDX-License-Identifier: GPL-2.0+
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*/
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.pic
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.text
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#include <common.h>
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@ -248,16 +250,11 @@ relo_base:
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*/
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li $r5, AHBC_BSR6_A
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lwi $r8, [$r5]
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li $r4, 0xfff00000
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li $r4, 0xfff00000 /* r4 = bank6 base */
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and $r4, $r4, $r8
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li $r5, 0x0
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la $r1, relo_base /* get $pc or $lp */
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sub $r2, $r0, $r1
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sethi $r6, hi20(_end)
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ori $r6, $r6, lo12(_end)
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add $r6, $r6, $r2
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la $r5, _start@GOTOFF
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la $r6, _end@GOTOFF
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1:
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lwi.p $r7, [$r5], #4
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swi.p $r7, [$r4], #4
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@ -9,6 +9,8 @@
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* SPDX-License-Identifier: GPL-2.0+
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*/
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.pic
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#include <asm-offsets.h>
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#include <config.h>
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#include <common.h>
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@ -116,6 +118,18 @@ IRQ_STACK_START_IN:
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*/
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reset:
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/*
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* gp = ~0 for burn mode
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* = ~load_address for load mode
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*/
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reset_gp:
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.relax_hint 0
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sethi $gp, hi20(_GLOBAL_OFFSET_TABLE_-8)
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.relax_hint 0
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ori $gp, $gp, lo12(_GLOBAL_OFFSET_TABLE_-4)
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add5.pc $gp
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set_ivb:
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li $r0, 0x0
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@ -124,20 +138,31 @@ set_ivb:
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/* set IVIC, vector size: 4 bytes, base: 0x0 */
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mtsr $r0, $ivb
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load_lli:
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#ifndef CONFIG_SKIP_LOWLEVEL_INIT
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jal load_lowlevel_init
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jral $p0
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jal lowlevel_init
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/*
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* gp = ~VMA for burn mode
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* = ~load_address for load mode
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*/
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update_gp:
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.relax_hint 0
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sethi $gp, hi20(_GLOBAL_OFFSET_TABLE_-8)
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.relax_hint 0
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ori $gp, $gp, lo12(_GLOBAL_OFFSET_TABLE_-4)
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add5.pc $gp
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#endif
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/*
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* do critical initializations first (shall be in short time)
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* do self_relocation ASAP.
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*/
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/*
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* Set the N1213 (Whitiger) core to superuser mode
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* According to spec, it is already when reset
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*/
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turnoff_wtdog:
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#ifndef CONFIG_SKIP_TRUNOFF_WATCHDOG
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jal load_turnoff_watchdog
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jral $p0
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jal turnoff_watchdog
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#endif
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/*
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@ -145,7 +170,7 @@ turnoff_wtdog:
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* not when booting from ram
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*/
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#ifdef CONFIG_INIT_CRITICAL
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bal cpu_init_crit ! Do CPU critical regs init
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jal cpu_init_crit ! Do CPU critical regs init
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#endif
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/*
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@ -174,6 +199,11 @@ call_board_init_f:
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* after relocating the monitor code.
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*
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*/
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/*
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* gp = ~RAM_SIZE - TEXT_SIZE for burn/load mode
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*/
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.globl relocate_code
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relocate_code:
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move $r4, $r0 /* save addr_sp */
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@ -184,49 +214,43 @@ relocate_code:
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stack_setup:
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move $sp, $r4
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la $r0, _start
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la $r0, _start@GOTOFF
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beq $r0, $r6, clear_bss /* skip relocation */
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move $r1, $r6 /* r1 <- scratch for copy_loop */
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la $r3, __bss_start
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sub $r3, $r3, $r0 /* r3 <- __bss_start_ofs */
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add $r2, $r0, $r3 /* r2 <- source end address */
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la $r1, _end@GOTOFF
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move $r2, $r6 /* r2 <- scratch for copy_loop */
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copy_loop:
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lwi.p $r7, [$r0], #4
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swi.p $r7, [$r1], #4
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blt $r0, $r2, copy_loop
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swi.p $r7, [$r2], #4
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blt $r0, $r1, copy_loop
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/*
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* fix relocations related issues
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*/
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fix_relocations:
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l.w $r0, _TEXT_BASE /* r0 <- Text base */
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sub $r9, $r6, $r0 /* r9 <- relocation offset */
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l.w $r0, _TEXT_BASE@GOTOFF /* r0 <- Text base */
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sub $r9, $r6, $r0 /* r9 <- relocation offset */
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fix_got:
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/*
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* Now we want to update GOT.
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*
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* GOT[0] is reserved. GOT[1] is also reserved for the dynamic object
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* generated by GNU ld. Skip these reserved entries from relocation.
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*/
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la $r2, __got_start /* r2 <- rel __got_start in FLASH */
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add $r2, $r2, $r9 /* r2 <- rel __got_start in RAM */
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la $r3, __got_end /* r3 <- rel __got_end in FLASH */
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add $r3, $r3, $r9 /* r3 <- rel __got_end in RAM */
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addi $r2, $r2, #8 /* skipping first two entries */
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fix_got_loop:
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lwi $r0, [$r2] /* r0 <- location in FLASH to fix up */
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add $r0, $r0, $r9 /* r0 <- location fix up to RAM */
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swi.p $r0, [$r2], #4 /* r0 <- store fix into .got in RAM */
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blt $r2, $r3, fix_got_loop
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la $r7, __rel_dyn_start@GOTOFF
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add $r7, $r7, $r9 /* r2 <- rel __got_start in RAM */
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la $r8, __rel_dyn_end@GOTOFF
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add $r8, $r8, $r9 /* r2 <- rel __got_start in RAM */
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li $r3, #0x2a /* R_NDS32_RELATIVE */
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1:
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lmw.bim $r0, [$r7], $r2 /* r0,r1,r2 <- adr,type,addend */
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bne $r1, $r3, 2f
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add $r0, $r0, $r9
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add $r2, $r2, $r9
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sw $r2, [$r0]
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2:
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blt $r7, $r8, 1b
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clear_bss:
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la $r0, __bss_start /* r0 <- rel __bss_start in FLASH */
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la $r0, __bss_start@GOTOFF /* r0 <- rel __bss_start in FLASH */
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add $r0, $r0, $r9 /* r0 <- rel __bss_start in FLASH */
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la $r1, __bss_end /* r1 <- rel __bss_end in RAM */
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la $r1, __bss_end@GOTOFF /* r1 <- rel __bss_end in RAM */
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add $r1, $r1, $r9 /* r0 <- rel __bss_end in RAM */
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li $r2, 0x00000000 /* clear */
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@ -240,7 +264,7 @@ clbss_l:
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* initialization, now running from RAM.
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*/
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call_board_init_r:
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la $r0, board_init_r
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la $r0, board_init_r@GOTOFF
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move $lp, $r0 /* offset of board_init_r() */
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add $lp, $lp, $r9 /* real address of board_init_r() */
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/* setup parameters for board_init_r */
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@ -275,8 +299,8 @@ cpu_init_crit:
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/* Flush caches and TLB */
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/* Invalidate caches */
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bal invalidate_icac
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bal invalidate_dcac
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jal invalidate_icac
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jal invalidate_dcac
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/* Flush TLB */
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mfsr $p0, $MMU_CFG
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@ -299,24 +323,6 @@ cpu_init_crit:
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2:
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ret
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#ifndef CONFIG_SKIP_LOWLEVEL_INIT
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load_lowlevel_init:
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la $r6, lowlevel_init
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la $r7, load_lli + 4
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sub $p0, $r6, $r7
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add $p0, $p0, $lp
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ret
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#endif
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#ifndef CONFIG_SKIP_TRUNOFF_WATCHDOG
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load_turnoff_watchdog:
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la $r6, turnoff_watchdog
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la $r7, turnoff_wtdog + 4
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sub $p0, $r6, $r7
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add $p0, $p0, $lp
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ret
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#endif
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/*
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* Invalidate I$
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*/
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@ -31,25 +31,28 @@ SECTIONS
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.got : {
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__got_start = .;
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*(.got.plt) *(.got)
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*(.got.plt) *(.got)
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__got_end = .;
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}
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. = .;
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. = ALIGN(4);
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.u_boot_list : {
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KEEP(*(SORT(.u_boot_list*)));
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}
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. = ALIGN(4);
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/DISCARD/ : { *(.rela.plt*) }
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.rela.dyn : {
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__rel_dyn_start = .;
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*(.rela*)
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__rel_dyn_end = .;
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}
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_end = .;
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.bss : {
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__bss_start = .;
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*(.bss)
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. = ALIGN(4);
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. = ALIGN(4);
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__bss_end = .;
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}
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@ -9,6 +9,4 @@
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#ifndef _ASM_CONFIG_H_
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#define _ASM_CONFIG_H_
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#define CONFIG_NEEDS_MANUAL_RELOC
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#endif
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@ -28,7 +28,6 @@
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#define CONFIG_CMDLINE_TAG /* send commandline to Kernel */
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#define CONFIG_SETUP_MEMORY_TAGS /* send memory definition to kernel */
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#define CONFIG_INITRD_TAG /* send initrd params */
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#define CONFIG_NEEDS_MANUAL_RELOC
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#ifndef CONFIG_SKIP_LOWLEVEL_INIT
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#define CONFIG_MEM_REMAP
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