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readelf: Add RISC-V DWARF register aliases

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This allows DWARF debugging output to use the common register
mneumonics, such as ra, sp, or t0.

DWARF registers 0-31 are mapped to the 32 general purpose registers,
which are then followed by the 32 floating point registers.

Reviewed by:	markj
Approved by:	markj (mentor)
MFC after:	3 days
Differential Revision:	https://reviews.freebsd.org/D20779
This commit is contained in:
Mitchell Horne 2019-06-30 19:47:15 +00:00
parent 5bb13a0b50
commit 1a0c2201f6
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=349563
1 changed files with 68 additions and 0 deletions
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68
contrib/elftoolchain/readelf/readelf.c
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@ -2080,6 +2080,74 @@ dwarf_reg(unsigned int mach, unsigned int reg)
case 49: return "ldtr";
default: return (NULL);
}
case EM_RISCV:
switch (reg) {
case 0: return "zero";
case 1: return "ra";
case 2: return "sp";
case 3: return "gp";
case 4: return "tp";
case 5: return "t0";
case 6: return "t1";
case 7: return "t2";
case 8: return "s0";
case 9: return "s1";
case 10: return "a0";
case 11: return "a1";
case 12: return "a2";
case 13: return "a3";
case 14: return "a4";
case 15: return "a5";
case 16: return "a6";
case 17: return "a7";
case 18: return "s2";
case 19: return "s3";
case 20: return "s4";
case 21: return "s5";
case 22: return "s6";
case 23: return "s7";
case 24: return "s8";
case 25: return "s9";
case 26: return "s10";
case 27: return "s11";
case 28: return "t3";
case 29: return "t4";
case 30: return "t5";
case 31: return "t6";
case 32: return "ft0";
case 33: return "ft1";
case 34: return "ft2";
case 35: return "ft3";
case 36: return "ft4";
case 37: return "ft5";
case 38: return "ft6";
case 39: return "ft7";
case 40: return "fs0";
case 41: return "fs1";
case 42: return "fa0";
case 43: return "fa1";
case 44: return "fa2";
case 45: return "fa3";
case 46: return "fa4";
case 47: return "fa5";
case 48: return "fa6";
case 49: return "fa7";
case 50: return "fs2";
case 51: return "fs3";
case 52: return "fs4";
case 53: return "fs5";
case 54: return "fs6";
case 55: return "fs7";
case 56: return "fs8";
case 57: return "fs9";
case 58: return "fs10";
case 59: return "fs11";
case 60: return "ft8";
case 61: return "ft9";
case 62: return "ft10";
case 63: return "ft11";
default: return (NULL);
}
case EM_X86_64:
switch (reg) {
case 0: return "rax";