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Move APP stack to beginning of RAM #73

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Move APP stack to beginning of RAM #73

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15 changes: 14 additions & 1 deletion app.lds
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Original file line number Diff line number Diff line change
Expand Up @@ -6,6 +6,9 @@
OUTPUT_ARCH( "riscv" )
ENTRY(_start)

/* Define stack size */
STACK_SIZE = 16K;

MEMORY
{
RAM (rwx) : ORIGIN = 0x40000000, LENGTH = 0x20000 /* 128 KB */
Expand All @@ -18,9 +21,20 @@ SECTIONS
*(.text.init)
} >RAM

.stack (NOLOAD) :
{
. = ALIGN(16);
_sstack = .;
. += STACK_SIZE;
. = ALIGN(16);
_estack = .;
_sidata = _estack;
} >RAM

.text :
{
. = ALIGN(4);
_stext = .;
*(.text) /* .text sections (code) */
*(.text*) /* .text* sections (code) */
*(.rodata) /* .rodata sections (constants, strings, etc.) */
Expand Down Expand Up @@ -60,5 +74,4 @@ SECTIONS
_ebss = .;
} >RAM

/* libcrt0/crt0.S inits stack to start just below end of RAM */
}
4 changes: 2 additions & 2 deletions libcrt0/crt0.S
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Expand Up @@ -36,8 +36,8 @@ _start:
li x30,0
li x31,0

/* init stack below 0x40020000 (TK1_RAM_BASE+TK1_RAM_SIZE) */
li sp, 0x4001fff0
/* init stack */
la sp, _estack

/* zero-init bss section */
la a0, _sbss
Expand Down