diff options
Diffstat (limited to 'riscv_new/rtl/linux/riscv64/prt0.as')
| -rw-r--r-- | riscv_new/rtl/linux/riscv64/prt0.as | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/riscv_new/rtl/linux/riscv64/prt0.as b/riscv_new/rtl/linux/riscv64/prt0.as new file mode 100644 index 0000000000..d489b5dcad --- /dev/null +++ b/riscv_new/rtl/linux/riscv64/prt0.as @@ -0,0 +1,83 @@ +/* + Start-up code for Free Pascal Compiler, not in a shared library, + not linking with C library. + + Written by Edmund Grimley Evans in 2015 and released into the public domain. +*/ + + .text + .align 2 + + .globl _dynamic_start + .type _dynamic_start, function +_dynamic_start: +1: + auipc x5,%pcrel_hi(__dl_fini) + sd x10, %pcrel_lo(1b)(x5) + jal x0, _start + + .globl _start + .type _start, function +_start: +1: + auipc gp, %pcrel_hi(__bss_start+0x800) + addi gp, gp, %pcrel_lo(1b) + + /* Get argc, argv, envp */ + ld x5,(x2) + addi x6,x2,8 + addi x7,x5,1 + slli x7,x7,3 + add x7,x6,x7 + + /* Save argc, argv, envp, and initial stack pointer */ +1:auipc x8,%pcrel_hi(operatingsystem_parameter_argc) + sd x5,%pcrel_lo(1b)(x8) +1:auipc x8,%pcrel_hi(operatingsystem_parameter_argv) + sd x6,%pcrel_lo(1b)(x8) +1:auipc x8,%pcrel_hi(operatingsystem_parameter_envp) + sd x7,%pcrel_lo(1b)(x8) +1:auipc x5,%pcrel_hi(__stkptr) + addi x6, x2, 0 + sd x6,%pcrel_lo(1b)(x5) + + /* Initialise FP to zero */ + addi x8,x0,0 + + /* Call main */ + jal x1, PASCALMAIN + + .globl _haltproc + .type _haltproc,function +_haltproc: +1:auipc x10,%pcrel_hi(__dl_fini) + ld x10,%pcrel_lo(1b)(x10) + beq x10,x0,.Lexit + jalr x1,x10 +.Lexit: +1:auipc x10,%pcrel_hi(operatingsystem_result) + ld x10,%pcrel_lo(1b)(x10) + addi x17, x0, 94 + ecall + jal x0, _haltproc + + /* Define a symbol for the first piece of initialized data. */ + .data + .align 4 + .globl __data_start +__data_start: + .quad 0 + .weak data_start + data_start = __data_start + + .bss + .align 4 + + .comm __dl_fini,8 + .comm __stkptr,8 + + .comm operatingsystem_parameter_envp,8 + .comm operatingsystem_parameter_argc,8 + .comm operatingsystem_parameter_argv,8 + + .section .note.GNU-stack,"",%progbits |