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bd3e9ebaea
This change checks elf_flags for EF_RISCV_RVE and if present uses the RVE linux syscall ABI which uses t0 for the syscall number instead of a7. Warn and exit if a non-RVE ABI binary is run on a cpu with the RVE extension as it is incompatible. Backports relevant parts of 5836c3eccedb6dfab16b8f606f2de24b8938b69c from qemu
15 lines
411 B
C
15 lines
411 B
C
#define xRA 1 /* return address (aka link register) */
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#define xSP 2 /* stack pointer */
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#define xGP 3 /* global pointer */
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#define xTP 4 /* thread pointer */
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#define xA0 10 /* gpr[10-17] are syscall arguments */
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#define xA1 11
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#define xA2 12
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#define xA3 13
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#define xA4 14
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#define xA5 15
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#define xA6 16
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#define xA7 17 /* syscall number for RVI ABI */
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#define xT0 5 /* syscall number for RVE ABI */
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