riscv64.h

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// SPDX-FileCopyrightText: 2020 Zi Fan <zifan.tan@gmail.com>
// SPDX-License-Identifier: LGPL-3.0-only
 
return strdup(
    "=PC    pc\n"
    "=SP    sp\n" // ABI: stack pointer
    "=LR    ra\n" // ABI: return address
    "=BP    s0\n" // ABI: frame pointer
    "=A0    a0\n"
    "=A1    a1\n"
    "=A2    a2\n"
    "=A3    a3\n"
    "=A4    a4\n"
    "=A5    a5\n"
    "=A6    a6\n"
    "=A7    a7\n"
    "=R0    a0\n"
    "=R1    a1\n"
    "=SN    a7\n" // ABI: syscall numer
    "gpr    zero    .64 0   0\n" // seems to be allocated in the arena too
    // RV64I regs (ABI names)
    // From user-Level ISA Specification, section 2.1 and 4.1
    // "zero" has been left out as it ignores writes and always reads as zero
    "gpr    ra  .64 8   0\n" // =x1
    "gpr    sp  .64 16  0\n" // =x2
    "gpr    gp  .64 24  0\n" // =x3
    "gpr    tp  .64 32  0\n" // =x4
    "gpr    t0  .64 40  0\n" // =x5
    "gpr    t1  .64 48  0\n" // =x6
    "gpr    t2  .64 56  0\n" // =x7
    "gpr    s0  .64 64  0\n" // =x8 // fp
    "gpr    s1  .64 72  0\n" // =x9
    "gpr    a0  .64 80  0\n" // =x10
    "gpr    a1  .64 88  0\n" // =x11
    "gpr    a2  .64 96  0\n" // =x12
    "gpr    a3  .64 104 0\n" // =x13
    "gpr    a4  .64 112 0\n" // =x14
    "gpr    a5  .64 120 0\n" // =x15
    "gpr    a6  .64 128 0\n" // =x16
    "gpr    a7  .64 136 0\n" // =x17
    "gpr    s2  .64 144 0\n" // =x18
    "gpr    s3  .64 152 0\n" // =x19
    "gpr    s4  .64 160 0\n" // =x20
    "gpr    s5  .64 168 0\n" // =x21
    "gpr    s6  .64 176 0\n" // =x22
    "gpr    s7  .64 184 0\n" // =x23
    "gpr    s8  .64 192 0\n" // =x24
    "gpr    s9  .64 200 0\n" // =x25
    "gpr    s10 .64 208 0\n" // =x26
    "gpr    s11 .64 216 0\n" // =x27
    "gpr    t3  .64 224 0\n" // =x28
    "gpr    t4  .64 232 0\n" // =x29
    "gpr    t5  .64 240 0\n" // =x30
    "gpr    t6  .64 248 0\n" // =x31
    "gpr    pc  .64 248 0\n");